Clinical Endocrinology News

Severe obesity among preschool-age children from low-income families is on the rise in the United States, according to a new analysis of federal data.

An estimated 2% of children ages 2 to 4 years old had severe obesity in 2020, up from 1.8% in 2016, according to the report that appeared Dec. 18 in Pediatrics, a journal published by the American Academy of Pediatrics. 

The increase is “small but significant,” a group of experts not involved in the research wrote in a companion commentary published alongside the research.

The new data put an end to hopes that childhood obesity was on the retreat following a small decrease in rates from 2010 to 2016. Instead, the researchers noted that the new childhood obesity figures reflect those of the general population. In the United States, about 20% of children and teens are obese, and about 42% of adults are obese, according to the CDC.

This latest study looked for severe obesity, which was defined as being well above the 95th percentile for the combined height-weight measure known as body mass index. The figures are important because rates of severe obesity among young children can foreshadow health problems that may occur on a scale to warrant concerns among public health officials, policymakers, and health care professionals.

Compared with children who have moderate obesity, children with severe obesity “are at a greater risk of various health complications, including cardiovascular disease, metabolic syndrome, type 2 diabetes, fatty liver disease, and premature death,” the study authors wrote.

The largest increases from 2016 to 2020 in severe obesity were observed among 4-year-olds and among Hispanic children. When looking at state-level data, Alaska was the only state to report a decline in severe obesity among young children from 2016 to 2020.

The new estimates were drawn from data on children enrolled in the federal Special Supplemental Nutrition Program for Women, Infants, and Children (WIC).

“WIC is a federal assistance program that provides healthy foods, nutrition education, health care referrals, and other services to millions of low-income pregnant and postpartum women, as well as infants and children up to age 5, who are at nutritional risk,” the researchers noted.

The new figures indicate 16.6 million children ages 2 to 4 years old have severe obesity. Having severe obesity at these early ages is “nearly irreversible,” the authors of the commentary article noted, adding that little research exists that indicates how to effectively treat obesity before age 6.

“The study underscores the need for ongoing monitoring ... post pandemic of children’s health status,” a news release from the American Academy of Pediatrics stated. “It also further supports the need for children and families from households with lower incomes across the nation to have access to early clinical detection, such as health care screenings and referrals to effective family-based interventions to support healthy growth.”
 

A version of this article first appeared on WebMD.com.

Severe obesity among preschool-age children from low-income families is on the rise in the United States, according to a new analysis of federal data.

An estimated 2% of children ages 2 to 4 years old had severe obesity in 2020, up from 1.8% in 2016, according to the report that appeared Dec. 18 in Pediatrics, a journal published by the American Academy of Pediatrics. 

The increase is “small but significant,” a group of experts not involved in the research wrote in a companion commentary published alongside the research.

The new data put an end to hopes that childhood obesity was on the retreat following a small decrease in rates from 2010 to 2016. Instead, the researchers noted that the new childhood obesity figures reflect those of the general population. In the United States, about 20% of children and teens are obese, and about 42% of adults are obese, according to the CDC.

This latest study looked for severe obesity, which was defined as being well above the 95th percentile for the combined height-weight measure known as body mass index. The figures are important because rates of severe obesity among young children can foreshadow health problems that may occur on a scale to warrant concerns among public health officials, policymakers, and health care professionals.

Compared with children who have moderate obesity, children with severe obesity “are at a greater risk of various health complications, including cardiovascular disease, metabolic syndrome, type 2 diabetes, fatty liver disease, and premature death,” the study authors wrote.

The largest increases from 2016 to 2020 in severe obesity were observed among 4-year-olds and among Hispanic children. When looking at state-level data, Alaska was the only state to report a decline in severe obesity among young children from 2016 to 2020.

The new estimates were drawn from data on children enrolled in the federal Special Supplemental Nutrition Program for Women, Infants, and Children (WIC).

“WIC is a federal assistance program that provides healthy foods, nutrition education, health care referrals, and other services to millions of low-income pregnant and postpartum women, as well as infants and children up to age 5, who are at nutritional risk,” the researchers noted.

The new figures indicate 16.6 million children ages 2 to 4 years old have severe obesity. Having severe obesity at these early ages is “nearly irreversible,” the authors of the commentary article noted, adding that little research exists that indicates how to effectively treat obesity before age 6.

“The study underscores the need for ongoing monitoring ... post pandemic of children’s health status,” a news release from the American Academy of Pediatrics stated. “It also further supports the need for children and families from households with lower incomes across the nation to have access to early clinical detection, such as health care screenings and referrals to effective family-based interventions to support healthy growth.”
 

A version of this article first appeared on WebMD.com.

Severe obesity among preschool-age children from low-income families is on the rise in the United States, according to a new analysis of federal data.

An estimated 2% of children ages 2 to 4 years old had severe obesity in 2020, up from 1.8% in 2016, according to the report that appeared Dec. 18 in Pediatrics, a journal published by the American Academy of Pediatrics. 

The increase is “small but significant,” a group of experts not involved in the research wrote in a companion commentary published alongside the research.

The new data put an end to hopes that childhood obesity was on the retreat following a small decrease in rates from 2010 to 2016. Instead, the researchers noted that the new childhood obesity figures reflect those of the general population. In the United States, about 20% of children and teens are obese, and about 42% of adults are obese, according to the CDC.

This latest study looked for severe obesity, which was defined as being well above the 95th percentile for the combined height-weight measure known as body mass index. The figures are important because rates of severe obesity among young children can foreshadow health problems that may occur on a scale to warrant concerns among public health officials, policymakers, and health care professionals.

Compared with children who have moderate obesity, children with severe obesity “are at a greater risk of various health complications, including cardiovascular disease, metabolic syndrome, type 2 diabetes, fatty liver disease, and premature death,” the study authors wrote.

The largest increases from 2016 to 2020 in severe obesity were observed among 4-year-olds and among Hispanic children. When looking at state-level data, Alaska was the only state to report a decline in severe obesity among young children from 2016 to 2020.

The new estimates were drawn from data on children enrolled in the federal Special Supplemental Nutrition Program for Women, Infants, and Children (WIC).

“WIC is a federal assistance program that provides healthy foods, nutrition education, health care referrals, and other services to millions of low-income pregnant and postpartum women, as well as infants and children up to age 5, who are at nutritional risk,” the researchers noted.

The new figures indicate 16.6 million children ages 2 to 4 years old have severe obesity. Having severe obesity at these early ages is “nearly irreversible,” the authors of the commentary article noted, adding that little research exists that indicates how to effectively treat obesity before age 6.

“The study underscores the need for ongoing monitoring ... post pandemic of children’s health status,” a news release from the American Academy of Pediatrics stated. “It also further supports the need for children and families from households with lower incomes across the nation to have access to early clinical detection, such as health care screenings and referrals to effective family-based interventions to support healthy growth.”
 

A version of this article first appeared on WebMD.com.

Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) are associated with a reduced risk for colorectal cancer (CRC) in patients with type 2 diabetes, with and without overweight or obesity, according to a new analysis.

In particular, GLP-1 RAs were associated with decreased risk compared with other antidiabetic treatments, including insulin, metformin, sodium-glucose cotransporter 2 (SGLT2) inhibitors, sulfonylureas, and thiazolidinediones.

More profound effects were seen in patients with overweight or obesity, “suggesting a potential protective effect against CRC partially mediated by weight loss and other mechanisms related to weight loss,” Lindsey Wang, an undergraduate student at Case Western Reserve University, Cleveland, Ohio, and colleagues wrote in JAMA Oncology.
 

Testing Treatments

GLP-1 RAs, usually given by injection, are approved by the US Food and Drug Administration to treat type 2 diabetes. They can lower blood sugar levels, improve insulin sensitivity, and help patients manage their weight.

Diabetes, overweight, and obesity are known risk factors for CRC and make prognosis worse. Ms. Wang and colleagues hypothesized that GLP-1 RAs might reduce CRC risk compared with other antidiabetics, including metformin and insulin, which have also been shown to reduce CRC risk.

Using a national database of more than 101 million electronic health records, Ms. Wang and colleagues conducted a population-based study of more than 1.2 million patients who had medical encounters for type 2 diabetes and were subsequently prescribed antidiabetic medications between 2005 and 2019. The patients had no prior antidiabetic medication use nor CRC diagnosis.

The researchers analyzed the effects of GLP-1 RAs on CRC incidence compared with the other prescribed antidiabetic drugs, matching for demographics, adverse socioeconomic determinants of health, preexisting medical conditions, family and personal history of cancers and colonic polyps, lifestyle factors, and procedures such as colonoscopy.

During a 15-year follow-up, GLP-1 RAs were associated with decreased risk for CRC compared with insulin (hazard ratio [HR], 0.56), metformin (HR, 0.75), SGLT2 inhibitors (HR, 0.77), sulfonylureas (HR, 0.82), and thiazolidinediones (HR, 0.82) in the overall study population.

For instance, among 22,572 patients who took insulin, 167 cases of CRC occurred, compared with 94 cases among the matched GLP-1 RA cohort. Among 18,518 patients who took metformin, 153 cases of CRC occurred compared with 96 cases among the matched GLP-1 RA cohort.

GLP-1 RAs also were associated with lower but not statistically significant risk than alpha-glucosidase inhibitors (HR, 0.59) and dipeptidyl-peptidase-4 (DPP-4) inhibitors (HR, 0.93).

In patients with overweight or obesity, GLP-1 RAs were associated with a lower risk for CRC than most of the other antidiabetics, including insulin (HR, 0.5), metformin (HR, 0.58), SGLT2 inhibitors (HR, 0.68), sulfonylureas (HR, 0.63), thiazolidinediones (HR, 0.73), and DPP-4 inhibitors (HR, 0.77).

Consistent findings were observed in women and men.

“Our results clearly demonstrate that GLP-1 RAs are significantly more effective than popular antidiabetic drugs, such as metformin or insulin, at preventing the development of CRC,” said Nathan Berger, MD, co-lead researcher, professor of experimental medicine, and member of the Case Comprehensive Cancer Center.
 

Targets for Future Research

Study limitations include potential unmeasured or uncontrolled confounders, self-selection, reverse causality, and other biases involved in observational studies, the research team noted.

Further research is warranted to investigate the effects in patients with prior antidiabetic treatments, underlying mechanisms, potential variation in effects among different GLP-1 RAs, and the potential of GLP-1 RAs to reduce the risks for other obesity-associated cancers, the researchers wrote.

“To our knowledge, this is the first indication this popular weight loss and antidiabetic class of drugs reduces incidence of CRC, relative to other antidiabetic agents,” said Rong Xu, PhD, co-lead researcher, professor of medicine, and member of the Case Comprehensive Cancer Center.

The study was supported by the National Cancer Institute Case Comprehensive Cancer Center, American Cancer Society, Landon Foundation-American Association for Cancer Research, National Institutes of Health Director’s New Innovator Award Program, National Institute on Aging, and National Institute on Alcohol Abuse and Alcoholism. Several authors reported grants from the National Institutes of Health during the conduct of the study.
 

A version of this article appeared on Medscape.com.

Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) are associated with a reduced risk for colorectal cancer (CRC) in patients with type 2 diabetes, with and without overweight or obesity, according to a new analysis.

In particular, GLP-1 RAs were associated with decreased risk compared with other antidiabetic treatments, including insulin, metformin, sodium-glucose cotransporter 2 (SGLT2) inhibitors, sulfonylureas, and thiazolidinediones.

More profound effects were seen in patients with overweight or obesity, “suggesting a potential protective effect against CRC partially mediated by weight loss and other mechanisms related to weight loss,” Lindsey Wang, an undergraduate student at Case Western Reserve University, Cleveland, Ohio, and colleagues wrote in JAMA Oncology.
 

Testing Treatments

GLP-1 RAs, usually given by injection, are approved by the US Food and Drug Administration to treat type 2 diabetes. They can lower blood sugar levels, improve insulin sensitivity, and help patients manage their weight.

Diabetes, overweight, and obesity are known risk factors for CRC and make prognosis worse. Ms. Wang and colleagues hypothesized that GLP-1 RAs might reduce CRC risk compared with other antidiabetics, including metformin and insulin, which have also been shown to reduce CRC risk.

Using a national database of more than 101 million electronic health records, Ms. Wang and colleagues conducted a population-based study of more than 1.2 million patients who had medical encounters for type 2 diabetes and were subsequently prescribed antidiabetic medications between 2005 and 2019. The patients had no prior antidiabetic medication use nor CRC diagnosis.

The researchers analyzed the effects of GLP-1 RAs on CRC incidence compared with the other prescribed antidiabetic drugs, matching for demographics, adverse socioeconomic determinants of health, preexisting medical conditions, family and personal history of cancers and colonic polyps, lifestyle factors, and procedures such as colonoscopy.

During a 15-year follow-up, GLP-1 RAs were associated with decreased risk for CRC compared with insulin (hazard ratio [HR], 0.56), metformin (HR, 0.75), SGLT2 inhibitors (HR, 0.77), sulfonylureas (HR, 0.82), and thiazolidinediones (HR, 0.82) in the overall study population.

For instance, among 22,572 patients who took insulin, 167 cases of CRC occurred, compared with 94 cases among the matched GLP-1 RA cohort. Among 18,518 patients who took metformin, 153 cases of CRC occurred compared with 96 cases among the matched GLP-1 RA cohort.

GLP-1 RAs also were associated with lower but not statistically significant risk than alpha-glucosidase inhibitors (HR, 0.59) and dipeptidyl-peptidase-4 (DPP-4) inhibitors (HR, 0.93).

In patients with overweight or obesity, GLP-1 RAs were associated with a lower risk for CRC than most of the other antidiabetics, including insulin (HR, 0.5), metformin (HR, 0.58), SGLT2 inhibitors (HR, 0.68), sulfonylureas (HR, 0.63), thiazolidinediones (HR, 0.73), and DPP-4 inhibitors (HR, 0.77).

Consistent findings were observed in women and men.

“Our results clearly demonstrate that GLP-1 RAs are significantly more effective than popular antidiabetic drugs, such as metformin or insulin, at preventing the development of CRC,” said Nathan Berger, MD, co-lead researcher, professor of experimental medicine, and member of the Case Comprehensive Cancer Center.
 

Targets for Future Research

Study limitations include potential unmeasured or uncontrolled confounders, self-selection, reverse causality, and other biases involved in observational studies, the research team noted.

Further research is warranted to investigate the effects in patients with prior antidiabetic treatments, underlying mechanisms, potential variation in effects among different GLP-1 RAs, and the potential of GLP-1 RAs to reduce the risks for other obesity-associated cancers, the researchers wrote.

“To our knowledge, this is the first indication this popular weight loss and antidiabetic class of drugs reduces incidence of CRC, relative to other antidiabetic agents,” said Rong Xu, PhD, co-lead researcher, professor of medicine, and member of the Case Comprehensive Cancer Center.

The study was supported by the National Cancer Institute Case Comprehensive Cancer Center, American Cancer Society, Landon Foundation-American Association for Cancer Research, National Institutes of Health Director’s New Innovator Award Program, National Institute on Aging, and National Institute on Alcohol Abuse and Alcoholism. Several authors reported grants from the National Institutes of Health during the conduct of the study.
 

A version of this article appeared on Medscape.com.

Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) are associated with a reduced risk for colorectal cancer (CRC) in patients with type 2 diabetes, with and without overweight or obesity, according to a new analysis.

In particular, GLP-1 RAs were associated with decreased risk compared with other antidiabetic treatments, including insulin, metformin, sodium-glucose cotransporter 2 (SGLT2) inhibitors, sulfonylureas, and thiazolidinediones.

More profound effects were seen in patients with overweight or obesity, “suggesting a potential protective effect against CRC partially mediated by weight loss and other mechanisms related to weight loss,” Lindsey Wang, an undergraduate student at Case Western Reserve University, Cleveland, Ohio, and colleagues wrote in JAMA Oncology.
 

Testing Treatments

GLP-1 RAs, usually given by injection, are approved by the US Food and Drug Administration to treat type 2 diabetes. They can lower blood sugar levels, improve insulin sensitivity, and help patients manage their weight.

Diabetes, overweight, and obesity are known risk factors for CRC and make prognosis worse. Ms. Wang and colleagues hypothesized that GLP-1 RAs might reduce CRC risk compared with other antidiabetics, including metformin and insulin, which have also been shown to reduce CRC risk.

Using a national database of more than 101 million electronic health records, Ms. Wang and colleagues conducted a population-based study of more than 1.2 million patients who had medical encounters for type 2 diabetes and were subsequently prescribed antidiabetic medications between 2005 and 2019. The patients had no prior antidiabetic medication use nor CRC diagnosis.

The researchers analyzed the effects of GLP-1 RAs on CRC incidence compared with the other prescribed antidiabetic drugs, matching for demographics, adverse socioeconomic determinants of health, preexisting medical conditions, family and personal history of cancers and colonic polyps, lifestyle factors, and procedures such as colonoscopy.

During a 15-year follow-up, GLP-1 RAs were associated with decreased risk for CRC compared with insulin (hazard ratio [HR], 0.56), metformin (HR, 0.75), SGLT2 inhibitors (HR, 0.77), sulfonylureas (HR, 0.82), and thiazolidinediones (HR, 0.82) in the overall study population.

For instance, among 22,572 patients who took insulin, 167 cases of CRC occurred, compared with 94 cases among the matched GLP-1 RA cohort. Among 18,518 patients who took metformin, 153 cases of CRC occurred compared with 96 cases among the matched GLP-1 RA cohort.

GLP-1 RAs also were associated with lower but not statistically significant risk than alpha-glucosidase inhibitors (HR, 0.59) and dipeptidyl-peptidase-4 (DPP-4) inhibitors (HR, 0.93).

In patients with overweight or obesity, GLP-1 RAs were associated with a lower risk for CRC than most of the other antidiabetics, including insulin (HR, 0.5), metformin (HR, 0.58), SGLT2 inhibitors (HR, 0.68), sulfonylureas (HR, 0.63), thiazolidinediones (HR, 0.73), and DPP-4 inhibitors (HR, 0.77).

Consistent findings were observed in women and men.

“Our results clearly demonstrate that GLP-1 RAs are significantly more effective than popular antidiabetic drugs, such as metformin or insulin, at preventing the development of CRC,” said Nathan Berger, MD, co-lead researcher, professor of experimental medicine, and member of the Case Comprehensive Cancer Center.
 

Targets for Future Research

Study limitations include potential unmeasured or uncontrolled confounders, self-selection, reverse causality, and other biases involved in observational studies, the research team noted.

Further research is warranted to investigate the effects in patients with prior antidiabetic treatments, underlying mechanisms, potential variation in effects among different GLP-1 RAs, and the potential of GLP-1 RAs to reduce the risks for other obesity-associated cancers, the researchers wrote.

“To our knowledge, this is the first indication this popular weight loss and antidiabetic class of drugs reduces incidence of CRC, relative to other antidiabetic agents,” said Rong Xu, PhD, co-lead researcher, professor of medicine, and member of the Case Comprehensive Cancer Center.

The study was supported by the National Cancer Institute Case Comprehensive Cancer Center, American Cancer Society, Landon Foundation-American Association for Cancer Research, National Institutes of Health Director’s New Innovator Award Program, National Institute on Aging, and National Institute on Alcohol Abuse and Alcoholism. Several authors reported grants from the National Institutes of Health during the conduct of the study.
 

A version of this article appeared on Medscape.com.

Nearly three quarters of dedicated thyroid ultrasounds don’t identify biopsy-recommended nodules, and over a third don’t identify any nodules, new research finds.

“The number of thyroid ultrasounds performed in the United States has increased fivefold since 2002. This substantial increase produces a significant strain on healthcare resources and leads to over-detection and overtreatment of benign thyroid nodules and small, indolent cancers with questionable clinical relevance,” wrote Elena Kennedy, MD, then a medical student in the department of surgery at the University of Wisconsin School of Medicine and Public Health, Madison, and colleagues.

The data, published online in Thyroid, come from a retrospective chart analysis of more than 1700 people who underwent dedicated (ie, specifically to look for a nodule) thyroid ultrasounds at a tertiary academic center. The rates of detecting both nodules and biopsy-recommended nodules were highest when the indication was a nodule seen incidentally on other imaging (aka “incidentaloma”) and lowest when the ultrasound was ordered because the patient had either metabolic or compressive symptoms.

And for the most commonly listed indication, a suspected palpable nodule, nearly half of the ultrasounds found no nodule, and only one in five detected a nodule that warranted a biopsy.

The principal investigator of the study David O. Francis, MD, an otolaryngologist at the University of Wisconsin, Madison, said in an interview, “Thyroid cancer has grown in incidence three to four times over the last 30 years without a good explanation for why…It seems to be that we’re detecting smaller and smaller nodules…Why are people being referred for all these ultrasounds? We looked for the upstream factors.”

One clear clinical implication of the new data, Dr. Francis noted, is that “if someone has compressive symptoms including dysphagia, swallowing problems, voice change, or globus sensation, ultrasound should not be the first way to work them up…It would be smarter to have someone evaluate their voice or their swallowing to see if there’s another reason besides the thyroid. The thyroid would have to get pretty big to cause dysphagia or swallowing problems.”
 

No Current Guidelines Advise When not to Order a Thyroid Ultrasound

Problematically, while there are professional society guidelines for what to do when a thyroid “incidentaloma” is found and other specific situations, there are no overall guidelines addressing when it’s appropriate to order a thyroid ultrasound, Dr. Kennedy, now an otolaryngology resident at the Indiana University of Indianapolis, and colleagues, point out.

According to Dr. Francis, “Ultrasounds are low cost and low risk. Those two factors result in people ordering more tests…The problem with that is we find things, and then we have to figure out what to do with them. That leads to incidentalomas, the surveillance, worry and anxiety, and costs…It’s tricky. We don’t want to discourage people from ever ordering ultrasounds, but there need to be some guidelines around when it’s appropriate to order.”

Asked to comment, Trevor E. Angell, MD, associate medical director of Thyroid Center at Keck School of Medicine of the University of Southern California, Los Angeles, said that the study is “clinically very important.”

Dr. Angell pointed out that the current American Thyroid Association (ATA) guidelines on thyroid nodule management, of which he is an author, recommend ultrasound for a known or suspected nodule. But he added, “there certainly should be a message that obtaining ultrasound for these other reasons are less likely to identify a nodule or anything causative. Whether it’s gastroesophageal reflux or allergic rhinitis or vocal cord dysfunction, an ultrasound isn’t a good test for those either.”

Dr. Angell said that the next ATA thyroid nodule guidelines, expected out in 2024, will address this topic more fully, but he couldn’t provide more specific information because the document is still in development. He did say, however, “Addressing when not to do an ultrasound will be an important consideration in the next guidelines.”
 

Low Detection Rates for Most Indications

The retrospective observational cohort study included 1739 adults (76% women; mean age, 53 years) who underwent dedicated thyroid ultrasounds between 2017 and 2019. In most cases, the recommendation for biopsy was determined using the American College of Radiology TI-RADS system, based on nodule size and TI-RADS category.

The most common indication for thyroid ultrasound, suspected palpable nodule, accounted for 40% of those performed. Follow-up for an “incidentaloma” was the indication in 28% of patients, and referral for compressive and metabolic symptoms accounted for 13% and 6% of ultrasounds, respectively.

Among all ultrasounds performed, 62% identified a thyroid nodule. Patients referred for incidental findings had the highest percentage of ultrasounds with thyroid nodules present at 94%. By contrast, in those referred for suspected palpable nodule on exam and for compressive symptoms, nodules were identified on 55% and 39% of ultrasounds, respectively. Patients with metabolic symptoms had a nodule identified on ultrasound 43% of the time. Among those referred for high risk factors, 57% had a nodule present.

Overall, only 27% of ultrasounds identified a thyroid nodule that was recommended for a biopsy. Again, those referred because of an incidental imaging finding had the highest percentage (55%), followed by those referred for a suspected palpable nodule (21%), high risk factors (20%), combined indications (16%), metabolic symptoms (10%), and compressive symptoms (6%).

Mean nodule size was largest among the patients referred for incidentalomas (2.4 cm), whereas all the other groups had mean nodule sizes between 1.2 cm and 1.8 cm, a significant difference (P < .05). The median size of nodules among those referred to ultrasound for a suspected palpable nodule was 1.4 cm.

“That’s pretty small. It would have had to be in the front of the thyroid where they could actually touch it. I would argue that the number of clinicians who actually palpated something was smaller. We’ve done several projects looking at how small a nodule a clinician can actually feel in the thyroid gland from the neck. It turns out we’re pretty bad at physical examination of the thyroid. This paper kind of reinforces that,” Dr. Francis said in an interview.

Patients with incidental nodules were over 10 times more likely to have a nodule found on an ultrasound than those referred for a suspected palpable nodule on exam (odds ratio [OR], 10.6). Conversely, those referred for compressive symptoms were half as likely to have an identifiable nodule compared with those referred for physical exam findings (OR, 0.5).

The odds of finding a nodule increased with age, especially for those aged ≥ 65 years compared with those younger than 45 years (OR, 3.6). Women were twice as likely to have a nodule found on thyroid ultrasound (OR, 2.0). Results were similar for the biopsy-recommended nodules, except that there was no difference between sexes (female vs male OR, 1.2).

Dr. Angell called the study “a very robust comprehensive evaluation,” but also noted that the single center source is a limitation. “It would be nice to have those big databases of national healthcare settings, but getting that granular level of information about why something was done is nearly impossible in that context.”

Dr. Kennedy, Dr. Francis, and Dr. Angell have no disclosures.

A version of this article appeared on Medscape.com.

Nearly three quarters of dedicated thyroid ultrasounds don’t identify biopsy-recommended nodules, and over a third don’t identify any nodules, new research finds.

“The number of thyroid ultrasounds performed in the United States has increased fivefold since 2002. This substantial increase produces a significant strain on healthcare resources and leads to over-detection and overtreatment of benign thyroid nodules and small, indolent cancers with questionable clinical relevance,” wrote Elena Kennedy, MD, then a medical student in the department of surgery at the University of Wisconsin School of Medicine and Public Health, Madison, and colleagues.

The data, published online in Thyroid, come from a retrospective chart analysis of more than 1700 people who underwent dedicated (ie, specifically to look for a nodule) thyroid ultrasounds at a tertiary academic center. The rates of detecting both nodules and biopsy-recommended nodules were highest when the indication was a nodule seen incidentally on other imaging (aka “incidentaloma”) and lowest when the ultrasound was ordered because the patient had either metabolic or compressive symptoms.

And for the most commonly listed indication, a suspected palpable nodule, nearly half of the ultrasounds found no nodule, and only one in five detected a nodule that warranted a biopsy.

The principal investigator of the study David O. Francis, MD, an otolaryngologist at the University of Wisconsin, Madison, said in an interview, “Thyroid cancer has grown in incidence three to four times over the last 30 years without a good explanation for why…It seems to be that we’re detecting smaller and smaller nodules…Why are people being referred for all these ultrasounds? We looked for the upstream factors.”

One clear clinical implication of the new data, Dr. Francis noted, is that “if someone has compressive symptoms including dysphagia, swallowing problems, voice change, or globus sensation, ultrasound should not be the first way to work them up…It would be smarter to have someone evaluate their voice or their swallowing to see if there’s another reason besides the thyroid. The thyroid would have to get pretty big to cause dysphagia or swallowing problems.”
 

No Current Guidelines Advise When not to Order a Thyroid Ultrasound

Problematically, while there are professional society guidelines for what to do when a thyroid “incidentaloma” is found and other specific situations, there are no overall guidelines addressing when it’s appropriate to order a thyroid ultrasound, Dr. Kennedy, now an otolaryngology resident at the Indiana University of Indianapolis, and colleagues, point out.

According to Dr. Francis, “Ultrasounds are low cost and low risk. Those two factors result in people ordering more tests…The problem with that is we find things, and then we have to figure out what to do with them. That leads to incidentalomas, the surveillance, worry and anxiety, and costs…It’s tricky. We don’t want to discourage people from ever ordering ultrasounds, but there need to be some guidelines around when it’s appropriate to order.”

Asked to comment, Trevor E. Angell, MD, associate medical director of Thyroid Center at Keck School of Medicine of the University of Southern California, Los Angeles, said that the study is “clinically very important.”

Dr. Angell pointed out that the current American Thyroid Association (ATA) guidelines on thyroid nodule management, of which he is an author, recommend ultrasound for a known or suspected nodule. But he added, “there certainly should be a message that obtaining ultrasound for these other reasons are less likely to identify a nodule or anything causative. Whether it’s gastroesophageal reflux or allergic rhinitis or vocal cord dysfunction, an ultrasound isn’t a good test for those either.”

Dr. Angell said that the next ATA thyroid nodule guidelines, expected out in 2024, will address this topic more fully, but he couldn’t provide more specific information because the document is still in development. He did say, however, “Addressing when not to do an ultrasound will be an important consideration in the next guidelines.”
 

Low Detection Rates for Most Indications

The retrospective observational cohort study included 1739 adults (76% women; mean age, 53 years) who underwent dedicated thyroid ultrasounds between 2017 and 2019. In most cases, the recommendation for biopsy was determined using the American College of Radiology TI-RADS system, based on nodule size and TI-RADS category.

The most common indication for thyroid ultrasound, suspected palpable nodule, accounted for 40% of those performed. Follow-up for an “incidentaloma” was the indication in 28% of patients, and referral for compressive and metabolic symptoms accounted for 13% and 6% of ultrasounds, respectively.

Among all ultrasounds performed, 62% identified a thyroid nodule. Patients referred for incidental findings had the highest percentage of ultrasounds with thyroid nodules present at 94%. By contrast, in those referred for suspected palpable nodule on exam and for compressive symptoms, nodules were identified on 55% and 39% of ultrasounds, respectively. Patients with metabolic symptoms had a nodule identified on ultrasound 43% of the time. Among those referred for high risk factors, 57% had a nodule present.

Overall, only 27% of ultrasounds identified a thyroid nodule that was recommended for a biopsy. Again, those referred because of an incidental imaging finding had the highest percentage (55%), followed by those referred for a suspected palpable nodule (21%), high risk factors (20%), combined indications (16%), metabolic symptoms (10%), and compressive symptoms (6%).

Mean nodule size was largest among the patients referred for incidentalomas (2.4 cm), whereas all the other groups had mean nodule sizes between 1.2 cm and 1.8 cm, a significant difference (P < .05). The median size of nodules among those referred to ultrasound for a suspected palpable nodule was 1.4 cm.

“That’s pretty small. It would have had to be in the front of the thyroid where they could actually touch it. I would argue that the number of clinicians who actually palpated something was smaller. We’ve done several projects looking at how small a nodule a clinician can actually feel in the thyroid gland from the neck. It turns out we’re pretty bad at physical examination of the thyroid. This paper kind of reinforces that,” Dr. Francis said in an interview.

Patients with incidental nodules were over 10 times more likely to have a nodule found on an ultrasound than those referred for a suspected palpable nodule on exam (odds ratio [OR], 10.6). Conversely, those referred for compressive symptoms were half as likely to have an identifiable nodule compared with those referred for physical exam findings (OR, 0.5).

The odds of finding a nodule increased with age, especially for those aged ≥ 65 years compared with those younger than 45 years (OR, 3.6). Women were twice as likely to have a nodule found on thyroid ultrasound (OR, 2.0). Results were similar for the biopsy-recommended nodules, except that there was no difference between sexes (female vs male OR, 1.2).

Dr. Angell called the study “a very robust comprehensive evaluation,” but also noted that the single center source is a limitation. “It would be nice to have those big databases of national healthcare settings, but getting that granular level of information about why something was done is nearly impossible in that context.”

Dr. Kennedy, Dr. Francis, and Dr. Angell have no disclosures.

A version of this article appeared on Medscape.com.

Nearly three quarters of dedicated thyroid ultrasounds don’t identify biopsy-recommended nodules, and over a third don’t identify any nodules, new research finds.

“The number of thyroid ultrasounds performed in the United States has increased fivefold since 2002. This substantial increase produces a significant strain on healthcare resources and leads to over-detection and overtreatment of benign thyroid nodules and small, indolent cancers with questionable clinical relevance,” wrote Elena Kennedy, MD, then a medical student in the department of surgery at the University of Wisconsin School of Medicine and Public Health, Madison, and colleagues.

The data, published online in Thyroid, come from a retrospective chart analysis of more than 1700 people who underwent dedicated (ie, specifically to look for a nodule) thyroid ultrasounds at a tertiary academic center. The rates of detecting both nodules and biopsy-recommended nodules were highest when the indication was a nodule seen incidentally on other imaging (aka “incidentaloma”) and lowest when the ultrasound was ordered because the patient had either metabolic or compressive symptoms.

And for the most commonly listed indication, a suspected palpable nodule, nearly half of the ultrasounds found no nodule, and only one in five detected a nodule that warranted a biopsy.

The principal investigator of the study David O. Francis, MD, an otolaryngologist at the University of Wisconsin, Madison, said in an interview, “Thyroid cancer has grown in incidence three to four times over the last 30 years without a good explanation for why…It seems to be that we’re detecting smaller and smaller nodules…Why are people being referred for all these ultrasounds? We looked for the upstream factors.”

One clear clinical implication of the new data, Dr. Francis noted, is that “if someone has compressive symptoms including dysphagia, swallowing problems, voice change, or globus sensation, ultrasound should not be the first way to work them up…It would be smarter to have someone evaluate their voice or their swallowing to see if there’s another reason besides the thyroid. The thyroid would have to get pretty big to cause dysphagia or swallowing problems.”
 

No Current Guidelines Advise When not to Order a Thyroid Ultrasound

Problematically, while there are professional society guidelines for what to do when a thyroid “incidentaloma” is found and other specific situations, there are no overall guidelines addressing when it’s appropriate to order a thyroid ultrasound, Dr. Kennedy, now an otolaryngology resident at the Indiana University of Indianapolis, and colleagues, point out.

According to Dr. Francis, “Ultrasounds are low cost and low risk. Those two factors result in people ordering more tests…The problem with that is we find things, and then we have to figure out what to do with them. That leads to incidentalomas, the surveillance, worry and anxiety, and costs…It’s tricky. We don’t want to discourage people from ever ordering ultrasounds, but there need to be some guidelines around when it’s appropriate to order.”

Asked to comment, Trevor E. Angell, MD, associate medical director of Thyroid Center at Keck School of Medicine of the University of Southern California, Los Angeles, said that the study is “clinically very important.”

Dr. Angell pointed out that the current American Thyroid Association (ATA) guidelines on thyroid nodule management, of which he is an author, recommend ultrasound for a known or suspected nodule. But he added, “there certainly should be a message that obtaining ultrasound for these other reasons are less likely to identify a nodule or anything causative. Whether it’s gastroesophageal reflux or allergic rhinitis or vocal cord dysfunction, an ultrasound isn’t a good test for those either.”

Dr. Angell said that the next ATA thyroid nodule guidelines, expected out in 2024, will address this topic more fully, but he couldn’t provide more specific information because the document is still in development. He did say, however, “Addressing when not to do an ultrasound will be an important consideration in the next guidelines.”
 

Low Detection Rates for Most Indications

The retrospective observational cohort study included 1739 adults (76% women; mean age, 53 years) who underwent dedicated thyroid ultrasounds between 2017 and 2019. In most cases, the recommendation for biopsy was determined using the American College of Radiology TI-RADS system, based on nodule size and TI-RADS category.

The most common indication for thyroid ultrasound, suspected palpable nodule, accounted for 40% of those performed. Follow-up for an “incidentaloma” was the indication in 28% of patients, and referral for compressive and metabolic symptoms accounted for 13% and 6% of ultrasounds, respectively.

Among all ultrasounds performed, 62% identified a thyroid nodule. Patients referred for incidental findings had the highest percentage of ultrasounds with thyroid nodules present at 94%. By contrast, in those referred for suspected palpable nodule on exam and for compressive symptoms, nodules were identified on 55% and 39% of ultrasounds, respectively. Patients with metabolic symptoms had a nodule identified on ultrasound 43% of the time. Among those referred for high risk factors, 57% had a nodule present.

Overall, only 27% of ultrasounds identified a thyroid nodule that was recommended for a biopsy. Again, those referred because of an incidental imaging finding had the highest percentage (55%), followed by those referred for a suspected palpable nodule (21%), high risk factors (20%), combined indications (16%), metabolic symptoms (10%), and compressive symptoms (6%).

Mean nodule size was largest among the patients referred for incidentalomas (2.4 cm), whereas all the other groups had mean nodule sizes between 1.2 cm and 1.8 cm, a significant difference (P < .05). The median size of nodules among those referred to ultrasound for a suspected palpable nodule was 1.4 cm.

“That’s pretty small. It would have had to be in the front of the thyroid where they could actually touch it. I would argue that the number of clinicians who actually palpated something was smaller. We’ve done several projects looking at how small a nodule a clinician can actually feel in the thyroid gland from the neck. It turns out we’re pretty bad at physical examination of the thyroid. This paper kind of reinforces that,” Dr. Francis said in an interview.

Patients with incidental nodules were over 10 times more likely to have a nodule found on an ultrasound than those referred for a suspected palpable nodule on exam (odds ratio [OR], 10.6). Conversely, those referred for compressive symptoms were half as likely to have an identifiable nodule compared with those referred for physical exam findings (OR, 0.5).

The odds of finding a nodule increased with age, especially for those aged ≥ 65 years compared with those younger than 45 years (OR, 3.6). Women were twice as likely to have a nodule found on thyroid ultrasound (OR, 2.0). Results were similar for the biopsy-recommended nodules, except that there was no difference between sexes (female vs male OR, 1.2).

Dr. Angell called the study “a very robust comprehensive evaluation,” but also noted that the single center source is a limitation. “It would be nice to have those big databases of national healthcare settings, but getting that granular level of information about why something was done is nearly impossible in that context.”

Dr. Kennedy, Dr. Francis, and Dr. Angell have no disclosures.

A version of this article appeared on Medscape.com.

VANCOUVER — Glucagon-like peptide-1 (GLP-1) agonists, like semaglutide, liraglutide, and the newly US Food and Drug Administration–approved tirzepatide, not only are gaining popularity among the public for weight loss but also are the focus of considerable attention from gastroenterology researchers.

The robust interest in GLP-1 agonists was on full display here at the annual meeting of the American College of Gastroenterology, with investigators sharing results on which agent is most effective for weight loss, how they compare to bariatric surgery for weight loss or prevention of metabolic dysfunction–associated steatotic liver disease, and their potential role to prevent regain after weight-loss surgery.
 

Head-to-Head Comparison

Tirzepatide 15 mg emerged as superior to other GLP-1 agonists for weight loss, for example, in a network meta-analysis of randomized controlled trials looking into obesity management.

Tirzepatide 15 mg was associated with the most effective mean weight loss at just over 15% when Jena Velji-Ibrahim, MD, and colleagues combined data from 14 studies with 18,714 participants with overweight or obesity but without diabetes.

Next up in order of weight-loss efficacy was tirzepatide 10 mg with 13% mean weight loss, semaglutide 2.4 mg with just over 11% mean weight loss, and tirzepatide 5 mg with almost 10% mean weight loss. The only outlier was dulaglutide 0.75 mg, which was linked to about 8% weight gain.

“While clinical trials have been conducted to assess the weight-loss efficacy of GLP-1 agonists, there has been limited head-to-head comparisons, and the data that has been obtained has been quite inconsistent,” Dr. Velji-Ibrahim said when presenting results at the meeting.

Researchers found little difference in efficacies between tirzepatide 15 mg and 10 mg, suggesting both are a viable option for weight loss, said Dr. Velji-Ibrahim of Prisma Health Greenville Memorial Hospital and University of South Carolina School of Medicine in Greenville.

She also reported similar efficacies between oral semaglutide 50 mg and subcutaneous semaglutide 2.4 mg, “meaning that we have another option for weight management.”

Side effects among the different GLP-1 agonists, and among the same agent at different doses, were not significantly different.
 

Comparison With Bariatric Surgery for Reducing Major Adverse Cardiovascular Events (MACE)

For many years, bariatric surgeons have pointed to the health benefits of weight-loss surgery in the right candidates, including a reduced risk for adverse cardiovascular events.

The weight loss associated with GLP-1 agonists has likewise shown benefits in reducing MACE. However, it remains unclear if one of these weight-loss strategies is better than the other in reducing these outcomes.

To determine this, researchers compared 118,828 people who had bariatric surgery to another propensity-matched group of 118,828 others prescribed GLP-1 agonists. They included adults with a body mass index (BMI) of 35 or higher in the national TriNetX database.

The multicenter, retrospective study revealed bariatric surgery was superior in reducing the risk for heart failure, MACE, and cerebrovascular disease at 3, 5, 7, and 10 years. At 10 years, for example, bariatric surgery was associated with 31% fewer composite cardiovascular events than the GLP-1 agonists.

“Our results suggest that bariatric surgery is more effective than GLP-1 analogs in preventing adverse cardiovascular events in obese patients,” Ayowumi A. Adekolu, MD, an internal medicine resident at West Virginia School of Medicine in Morgantown, said in audio comments accompanying his ePoster at the meeting. “Although these findings highlight the benefit of bariatric surgery in mitigating adverse cardiovascular events, well-designed prospective studies are necessary to confirm these benefits in this patient population.”

Possible Role in Fatty Liver Disease Prevention
 

In another large multicenter study from the same institution, Ethan M. Cohen, MD, along with co-author Dr. Adekolu and others, compared the effectiveness of bariatric surgery to GLP-1 agonists for preventing nonalcoholic fatty liver disease (NAFLD). Since the study was conducted, the official name of NAFLD has changed to metabolic dysfunction–associated steatotic liver disease.

Dr. Cohen and colleagues evaluated data from the TriNetX database and included adults with a BMI of 35 or higher. They propensity matched 124,022 people who had sleeve gastrectomy or Roux-en-Y gastric bypass to another 124,022 others prescribed GLP-1 agonists. Again, they looked at outcomes at 3, 5, 7, and 10 years.

They found bariatric surgery superior to GLP-1 agonists for reducing the risk of developing NAFLD. Relative risk reduction was 25% at 3 years, 28% at 5 years, 27% at 7 years, and 26% at 10 years.

Although not to the same extent as surgery in this study, GLP-1–associated weight loss did reduce risks as well.

“An important aspect of this is that for some of these people, bariatric surgery is not even an option,” Dr. Cohen said in an interview, citing as an example those who do not meet the criteria for surgery.

Dr. Cohen and colleagues plan to continue the study with a larger number of participants.
 

Real-World Weight Regain

In another instance where a surgical procedure trumped GLP-1 agonists, revisional endoscopic sleeve gastroplasty (ESG) offered significantly higher weight loss than GLP-1 agonists among people who regained weight following initial weight-loss surgery, according to a case-control real-world study presented at the meeting.

“Laparoscopic sleeve gastrectomy [LSG] is a frequently performed bariatric surgery worldwide resulting in significant weight loss and improvement in obesity-related comorbidities,” said Firas Bahdi, MD, gastroenterology fellow at the David Geffen School of Medicine at University of California, Los Angeles. “Despite its success, around one third of patients, unfortunately, develop weight regain warranting intervention.”

Dr. Bahdi and colleagues retrospectively studied 68 adults prescribed subcutaneous semaglutide or tirzepatide after LSG, another 20 who had ESG for weight regain after LSG, and 87 controls with intact stomachs who also took GLP-1 agonists for weight loss.

They found that the ESG group experienced a significantly higher percentage of total body weight loss at 3 months than the GLP-1 group (10% vs 4.3%, respectively; P = .0001). Similarly, at the 6-month follow-up, the ESG group experienced 11.5% total body weight loss compared to 6.8% in the GLP-1 group (P = .03).

The GLP-1 after LSG group still fared better than the GLP-1 control group of people who never had surgery. Total body weight loss was 4.3% vs 5.7% at 3 months (P = .02), 6.8% vs 9.2% at 6 months (P = .02), and 9.2% vs 12.7% at 12 months (P = .03).

“In this real-world experience, revisional ESG offers significantly more weight loss than GLP-1 agonists for patients with weight regain, while also avoiding the challenges of medication refills, making it an attractive option,” Dr. Bahdi said.

Future multicenter studies are warranted to confirm these results and explore physiological explanations, he added.

The study received an Outstanding Research Award in the Obesity Category (Trainee).

Dr. Velji-Ibrahim, Dr. Adekolu, Dr. Cohen, and Dr. Bahdi indicated no relevant financial relationships.

A version of this article appeared on Medscape.com.

VANCOUVER — Glucagon-like peptide-1 (GLP-1) agonists, like semaglutide, liraglutide, and the newly US Food and Drug Administration–approved tirzepatide, not only are gaining popularity among the public for weight loss but also are the focus of considerable attention from gastroenterology researchers.

The robust interest in GLP-1 agonists was on full display here at the annual meeting of the American College of Gastroenterology, with investigators sharing results on which agent is most effective for weight loss, how they compare to bariatric surgery for weight loss or prevention of metabolic dysfunction–associated steatotic liver disease, and their potential role to prevent regain after weight-loss surgery.
 

Head-to-Head Comparison

Tirzepatide 15 mg emerged as superior to other GLP-1 agonists for weight loss, for example, in a network meta-analysis of randomized controlled trials looking into obesity management.

Tirzepatide 15 mg was associated with the most effective mean weight loss at just over 15% when Jena Velji-Ibrahim, MD, and colleagues combined data from 14 studies with 18,714 participants with overweight or obesity but without diabetes.

Next up in order of weight-loss efficacy was tirzepatide 10 mg with 13% mean weight loss, semaglutide 2.4 mg with just over 11% mean weight loss, and tirzepatide 5 mg with almost 10% mean weight loss. The only outlier was dulaglutide 0.75 mg, which was linked to about 8% weight gain.

“While clinical trials have been conducted to assess the weight-loss efficacy of GLP-1 agonists, there has been limited head-to-head comparisons, and the data that has been obtained has been quite inconsistent,” Dr. Velji-Ibrahim said when presenting results at the meeting.

Researchers found little difference in efficacies between tirzepatide 15 mg and 10 mg, suggesting both are a viable option for weight loss, said Dr. Velji-Ibrahim of Prisma Health Greenville Memorial Hospital and University of South Carolina School of Medicine in Greenville.

She also reported similar efficacies between oral semaglutide 50 mg and subcutaneous semaglutide 2.4 mg, “meaning that we have another option for weight management.”

Side effects among the different GLP-1 agonists, and among the same agent at different doses, were not significantly different.
 

Comparison With Bariatric Surgery for Reducing Major Adverse Cardiovascular Events (MACE)

For many years, bariatric surgeons have pointed to the health benefits of weight-loss surgery in the right candidates, including a reduced risk for adverse cardiovascular events.

The weight loss associated with GLP-1 agonists has likewise shown benefits in reducing MACE. However, it remains unclear if one of these weight-loss strategies is better than the other in reducing these outcomes.

To determine this, researchers compared 118,828 people who had bariatric surgery to another propensity-matched group of 118,828 others prescribed GLP-1 agonists. They included adults with a body mass index (BMI) of 35 or higher in the national TriNetX database.

The multicenter, retrospective study revealed bariatric surgery was superior in reducing the risk for heart failure, MACE, and cerebrovascular disease at 3, 5, 7, and 10 years. At 10 years, for example, bariatric surgery was associated with 31% fewer composite cardiovascular events than the GLP-1 agonists.

“Our results suggest that bariatric surgery is more effective than GLP-1 analogs in preventing adverse cardiovascular events in obese patients,” Ayowumi A. Adekolu, MD, an internal medicine resident at West Virginia School of Medicine in Morgantown, said in audio comments accompanying his ePoster at the meeting. “Although these findings highlight the benefit of bariatric surgery in mitigating adverse cardiovascular events, well-designed prospective studies are necessary to confirm these benefits in this patient population.”

Possible Role in Fatty Liver Disease Prevention
 

In another large multicenter study from the same institution, Ethan M. Cohen, MD, along with co-author Dr. Adekolu and others, compared the effectiveness of bariatric surgery to GLP-1 agonists for preventing nonalcoholic fatty liver disease (NAFLD). Since the study was conducted, the official name of NAFLD has changed to metabolic dysfunction–associated steatotic liver disease.

Dr. Cohen and colleagues evaluated data from the TriNetX database and included adults with a BMI of 35 or higher. They propensity matched 124,022 people who had sleeve gastrectomy or Roux-en-Y gastric bypass to another 124,022 others prescribed GLP-1 agonists. Again, they looked at outcomes at 3, 5, 7, and 10 years.

They found bariatric surgery superior to GLP-1 agonists for reducing the risk of developing NAFLD. Relative risk reduction was 25% at 3 years, 28% at 5 years, 27% at 7 years, and 26% at 10 years.

Although not to the same extent as surgery in this study, GLP-1–associated weight loss did reduce risks as well.

“An important aspect of this is that for some of these people, bariatric surgery is not even an option,” Dr. Cohen said in an interview, citing as an example those who do not meet the criteria for surgery.

Dr. Cohen and colleagues plan to continue the study with a larger number of participants.
 

Real-World Weight Regain

In another instance where a surgical procedure trumped GLP-1 agonists, revisional endoscopic sleeve gastroplasty (ESG) offered significantly higher weight loss than GLP-1 agonists among people who regained weight following initial weight-loss surgery, according to a case-control real-world study presented at the meeting.

“Laparoscopic sleeve gastrectomy [LSG] is a frequently performed bariatric surgery worldwide resulting in significant weight loss and improvement in obesity-related comorbidities,” said Firas Bahdi, MD, gastroenterology fellow at the David Geffen School of Medicine at University of California, Los Angeles. “Despite its success, around one third of patients, unfortunately, develop weight regain warranting intervention.”

Dr. Bahdi and colleagues retrospectively studied 68 adults prescribed subcutaneous semaglutide or tirzepatide after LSG, another 20 who had ESG for weight regain after LSG, and 87 controls with intact stomachs who also took GLP-1 agonists for weight loss.

They found that the ESG group experienced a significantly higher percentage of total body weight loss at 3 months than the GLP-1 group (10% vs 4.3%, respectively; P = .0001). Similarly, at the 6-month follow-up, the ESG group experienced 11.5% total body weight loss compared to 6.8% in the GLP-1 group (P = .03).

The GLP-1 after LSG group still fared better than the GLP-1 control group of people who never had surgery. Total body weight loss was 4.3% vs 5.7% at 3 months (P = .02), 6.8% vs 9.2% at 6 months (P = .02), and 9.2% vs 12.7% at 12 months (P = .03).

“In this real-world experience, revisional ESG offers significantly more weight loss than GLP-1 agonists for patients with weight regain, while also avoiding the challenges of medication refills, making it an attractive option,” Dr. Bahdi said.

Future multicenter studies are warranted to confirm these results and explore physiological explanations, he added.

The study received an Outstanding Research Award in the Obesity Category (Trainee).

Dr. Velji-Ibrahim, Dr. Adekolu, Dr. Cohen, and Dr. Bahdi indicated no relevant financial relationships.

A version of this article appeared on Medscape.com.

VANCOUVER — Glucagon-like peptide-1 (GLP-1) agonists, like semaglutide, liraglutide, and the newly US Food and Drug Administration–approved tirzepatide, not only are gaining popularity among the public for weight loss but also are the focus of considerable attention from gastroenterology researchers.

The robust interest in GLP-1 agonists was on full display here at the annual meeting of the American College of Gastroenterology, with investigators sharing results on which agent is most effective for weight loss, how they compare to bariatric surgery for weight loss or prevention of metabolic dysfunction–associated steatotic liver disease, and their potential role to prevent regain after weight-loss surgery.
 

Head-to-Head Comparison

Tirzepatide 15 mg emerged as superior to other GLP-1 agonists for weight loss, for example, in a network meta-analysis of randomized controlled trials looking into obesity management.

Tirzepatide 15 mg was associated with the most effective mean weight loss at just over 15% when Jena Velji-Ibrahim, MD, and colleagues combined data from 14 studies with 18,714 participants with overweight or obesity but without diabetes.

Next up in order of weight-loss efficacy was tirzepatide 10 mg with 13% mean weight loss, semaglutide 2.4 mg with just over 11% mean weight loss, and tirzepatide 5 mg with almost 10% mean weight loss. The only outlier was dulaglutide 0.75 mg, which was linked to about 8% weight gain.

“While clinical trials have been conducted to assess the weight-loss efficacy of GLP-1 agonists, there has been limited head-to-head comparisons, and the data that has been obtained has been quite inconsistent,” Dr. Velji-Ibrahim said when presenting results at the meeting.

Researchers found little difference in efficacies between tirzepatide 15 mg and 10 mg, suggesting both are a viable option for weight loss, said Dr. Velji-Ibrahim of Prisma Health Greenville Memorial Hospital and University of South Carolina School of Medicine in Greenville.

She also reported similar efficacies between oral semaglutide 50 mg and subcutaneous semaglutide 2.4 mg, “meaning that we have another option for weight management.”

Side effects among the different GLP-1 agonists, and among the same agent at different doses, were not significantly different.
 

Comparison With Bariatric Surgery for Reducing Major Adverse Cardiovascular Events (MACE)

For many years, bariatric surgeons have pointed to the health benefits of weight-loss surgery in the right candidates, including a reduced risk for adverse cardiovascular events.

The weight loss associated with GLP-1 agonists has likewise shown benefits in reducing MACE. However, it remains unclear if one of these weight-loss strategies is better than the other in reducing these outcomes.

To determine this, researchers compared 118,828 people who had bariatric surgery to another propensity-matched group of 118,828 others prescribed GLP-1 agonists. They included adults with a body mass index (BMI) of 35 or higher in the national TriNetX database.

The multicenter, retrospective study revealed bariatric surgery was superior in reducing the risk for heart failure, MACE, and cerebrovascular disease at 3, 5, 7, and 10 years. At 10 years, for example, bariatric surgery was associated with 31% fewer composite cardiovascular events than the GLP-1 agonists.

“Our results suggest that bariatric surgery is more effective than GLP-1 analogs in preventing adverse cardiovascular events in obese patients,” Ayowumi A. Adekolu, MD, an internal medicine resident at West Virginia School of Medicine in Morgantown, said in audio comments accompanying his ePoster at the meeting. “Although these findings highlight the benefit of bariatric surgery in mitigating adverse cardiovascular events, well-designed prospective studies are necessary to confirm these benefits in this patient population.”

Possible Role in Fatty Liver Disease Prevention
 

In another large multicenter study from the same institution, Ethan M. Cohen, MD, along with co-author Dr. Adekolu and others, compared the effectiveness of bariatric surgery to GLP-1 agonists for preventing nonalcoholic fatty liver disease (NAFLD). Since the study was conducted, the official name of NAFLD has changed to metabolic dysfunction–associated steatotic liver disease.

Dr. Cohen and colleagues evaluated data from the TriNetX database and included adults with a BMI of 35 or higher. They propensity matched 124,022 people who had sleeve gastrectomy or Roux-en-Y gastric bypass to another 124,022 others prescribed GLP-1 agonists. Again, they looked at outcomes at 3, 5, 7, and 10 years.

They found bariatric surgery superior to GLP-1 agonists for reducing the risk of developing NAFLD. Relative risk reduction was 25% at 3 years, 28% at 5 years, 27% at 7 years, and 26% at 10 years.

Although not to the same extent as surgery in this study, GLP-1–associated weight loss did reduce risks as well.

“An important aspect of this is that for some of these people, bariatric surgery is not even an option,” Dr. Cohen said in an interview, citing as an example those who do not meet the criteria for surgery.

Dr. Cohen and colleagues plan to continue the study with a larger number of participants.
 

Real-World Weight Regain

In another instance where a surgical procedure trumped GLP-1 agonists, revisional endoscopic sleeve gastroplasty (ESG) offered significantly higher weight loss than GLP-1 agonists among people who regained weight following initial weight-loss surgery, according to a case-control real-world study presented at the meeting.

“Laparoscopic sleeve gastrectomy [LSG] is a frequently performed bariatric surgery worldwide resulting in significant weight loss and improvement in obesity-related comorbidities,” said Firas Bahdi, MD, gastroenterology fellow at the David Geffen School of Medicine at University of California, Los Angeles. “Despite its success, around one third of patients, unfortunately, develop weight regain warranting intervention.”

Dr. Bahdi and colleagues retrospectively studied 68 adults prescribed subcutaneous semaglutide or tirzepatide after LSG, another 20 who had ESG for weight regain after LSG, and 87 controls with intact stomachs who also took GLP-1 agonists for weight loss.

They found that the ESG group experienced a significantly higher percentage of total body weight loss at 3 months than the GLP-1 group (10% vs 4.3%, respectively; P = .0001). Similarly, at the 6-month follow-up, the ESG group experienced 11.5% total body weight loss compared to 6.8% in the GLP-1 group (P = .03).

The GLP-1 after LSG group still fared better than the GLP-1 control group of people who never had surgery. Total body weight loss was 4.3% vs 5.7% at 3 months (P = .02), 6.8% vs 9.2% at 6 months (P = .02), and 9.2% vs 12.7% at 12 months (P = .03).

“In this real-world experience, revisional ESG offers significantly more weight loss than GLP-1 agonists for patients with weight regain, while also avoiding the challenges of medication refills, making it an attractive option,” Dr. Bahdi said.

Future multicenter studies are warranted to confirm these results and explore physiological explanations, he added.

The study received an Outstanding Research Award in the Obesity Category (Trainee).

Dr. Velji-Ibrahim, Dr. Adekolu, Dr. Cohen, and Dr. Bahdi indicated no relevant financial relationships.

A version of this article appeared on Medscape.com.

TOPLINE:

Pregnancy weight gain is lower in women with a history of gastric bypass or sleeve gastrectomy than in those without such a history, especially when the interval between surgery and conception is shorter, new data suggest.

METHODOLOGY:

• Using Swedish national registers, researchers investigated the association of pregnancy weight gain with  history in 12,776 pregnancies — 6388 in women with a history of bariatric surgery and 6388 in women without such a history.
• Pregnancies were propensity score matched to patients’ early-pregnancy body mass index (BMI), prepregnancy diabetes, , smoking status, education, height, country of birth, and delivery year.
• Post-gastric bypass pregnancies were matched to post-sleeve gastrectomy pregnancies using the same matching strategy.
• Time from surgery to conception was also assessed.

TAKEAWAY:

• Across all early-pregnancy BMI strata, women with a history of bariatric surgery had lower pregnancy weight gain than matched controls.
• The magnitude of difference was largest for women with normal weight or overweight early-pregnancy BMI status (adjusted mean difference in z score, −0.33), which then decreased stepwise within the  subclasses (−0.21, −0.16, and −0.08 for obesity classes I, II, and III, respectively).
• Pregnancy weight gain did not differ by surgery type, but lower pregnancy weight gain was associated with a shorter surgery-to-conception interval (particularly within 1 year) or lower surgery-to-conception weight loss.

IN PRACTICE:

“The highest proportion of weight gain below the recommendations was found among women with a normal weight status. Hence, clinical attention to women with history of bariatric surgery and a normal weight status in early pregnancy might be warranted,” the authors advised.

SOURCE:

The study, with the first author Huiling Xu, MD, MSc, Karolinska Institutet, Stockholm, Sweden, was published online in JAMA Network Open.

LIMITATIONS:

Despite rigorous matching, residual confounding was possible. The sample size was limited for some subgroups, possibly affecting statistical power. Although the study provides an overview of pregnancy outcomes within surgery-to-conception interval and pregnancy weight gain z scores, a more in-depth investigation is needed to understand the associations among bariatric surgery, pregnancy weight gain, and pregnancy outcomes.

DISCLOSURES:

Research for this study was supported by the Swedish Research Council for Health, Working Life and Welfare, and the Swedish Research Council. The authors have no relevant disclosures.

A version of this article appeared on Medscape.com.

TOPLINE:

Pregnancy weight gain is lower in women with a history of gastric bypass or sleeve gastrectomy than in those without such a history, especially when the interval between surgery and conception is shorter, new data suggest.

METHODOLOGY:

• Using Swedish national registers, researchers investigated the association of pregnancy weight gain with  history in 12,776 pregnancies — 6388 in women with a history of bariatric surgery and 6388 in women without such a history.
• Pregnancies were propensity score matched to patients’ early-pregnancy body mass index (BMI), prepregnancy diabetes, , smoking status, education, height, country of birth, and delivery year.
• Post-gastric bypass pregnancies were matched to post-sleeve gastrectomy pregnancies using the same matching strategy.
• Time from surgery to conception was also assessed.

TAKEAWAY:

• Across all early-pregnancy BMI strata, women with a history of bariatric surgery had lower pregnancy weight gain than matched controls.
• The magnitude of difference was largest for women with normal weight or overweight early-pregnancy BMI status (adjusted mean difference in z score, −0.33), which then decreased stepwise within the  subclasses (−0.21, −0.16, and −0.08 for obesity classes I, II, and III, respectively).
• Pregnancy weight gain did not differ by surgery type, but lower pregnancy weight gain was associated with a shorter surgery-to-conception interval (particularly within 1 year) or lower surgery-to-conception weight loss.

IN PRACTICE:

“The highest proportion of weight gain below the recommendations was found among women with a normal weight status. Hence, clinical attention to women with history of bariatric surgery and a normal weight status in early pregnancy might be warranted,” the authors advised.

SOURCE:

The study, with the first author Huiling Xu, MD, MSc, Karolinska Institutet, Stockholm, Sweden, was published online in JAMA Network Open.

LIMITATIONS:

Despite rigorous matching, residual confounding was possible. The sample size was limited for some subgroups, possibly affecting statistical power. Although the study provides an overview of pregnancy outcomes within surgery-to-conception interval and pregnancy weight gain z scores, a more in-depth investigation is needed to understand the associations among bariatric surgery, pregnancy weight gain, and pregnancy outcomes.

DISCLOSURES:

Research for this study was supported by the Swedish Research Council for Health, Working Life and Welfare, and the Swedish Research Council. The authors have no relevant disclosures.

A version of this article appeared on Medscape.com.

TOPLINE:

Pregnancy weight gain is lower in women with a history of gastric bypass or sleeve gastrectomy than in those without such a history, especially when the interval between surgery and conception is shorter, new data suggest.

METHODOLOGY:

• Using Swedish national registers, researchers investigated the association of pregnancy weight gain with  history in 12,776 pregnancies — 6388 in women with a history of bariatric surgery and 6388 in women without such a history.
• Pregnancies were propensity score matched to patients’ early-pregnancy body mass index (BMI), prepregnancy diabetes, , smoking status, education, height, country of birth, and delivery year.
• Post-gastric bypass pregnancies were matched to post-sleeve gastrectomy pregnancies using the same matching strategy.
• Time from surgery to conception was also assessed.

TAKEAWAY:

• Across all early-pregnancy BMI strata, women with a history of bariatric surgery had lower pregnancy weight gain than matched controls.
• The magnitude of difference was largest for women with normal weight or overweight early-pregnancy BMI status (adjusted mean difference in z score, −0.33), which then decreased stepwise within the  subclasses (−0.21, −0.16, and −0.08 for obesity classes I, II, and III, respectively).
• Pregnancy weight gain did not differ by surgery type, but lower pregnancy weight gain was associated with a shorter surgery-to-conception interval (particularly within 1 year) or lower surgery-to-conception weight loss.

IN PRACTICE:

“The highest proportion of weight gain below the recommendations was found among women with a normal weight status. Hence, clinical attention to women with history of bariatric surgery and a normal weight status in early pregnancy might be warranted,” the authors advised.

SOURCE:

The study, with the first author Huiling Xu, MD, MSc, Karolinska Institutet, Stockholm, Sweden, was published online in JAMA Network Open.

LIMITATIONS:

Despite rigorous matching, residual confounding was possible. The sample size was limited for some subgroups, possibly affecting statistical power. Although the study provides an overview of pregnancy outcomes within surgery-to-conception interval and pregnancy weight gain z scores, a more in-depth investigation is needed to understand the associations among bariatric surgery, pregnancy weight gain, and pregnancy outcomes.

DISCLOSURES:

Research for this study was supported by the Swedish Research Council for Health, Working Life and Welfare, and the Swedish Research Council. The authors have no relevant disclosures.

A version of this article appeared on Medscape.com.

Bass-heavy rock music applied directly to the abdomen of diabetic mice implanted with music-sensitive insulin-releasing cells attenuates postprandial glycemic excursions and restores normoglycemia, reveals a series of experiments.

The research was published in The Lancet Diabetes & Endocrinology.

After developing a cell line in which music-sensitive calcium channels triggered the release of insulin-containing vesicles, the researchers conducted a series of studies identifying the optimal frequency, pitch, and volume of sounds for triggering release.

After settling on low-bass heavy popular music, they tested their system on mice with type 1 diabetes that had the insulin-releasing cells implanted in their abdomen. Applying the music directly at 60 dB led to near wild-type levels of insulin in the blood within 15 minutes.

“With only 4 hours required for a full refill, [the system] can provide several therapeutic doses a day,” says Martin Fussenegger, PhD, professor of biotechnology and bioengineering, Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland, and colleagues.

“This would match the typical needs of people with type 2 diabetes consuming three meals a day, and for whom administration of prandial insulin is an established treatment option, as they do not have capability for early postprandial insulin secretion from preformed insulin.”

As the system requires nothing more than portable battery-powered commercially available loudspeakers, the multiple daily dosing of biopharmaceuticals becomes “straightforward in the absence of medical infrastructure or staff, simply by having the patient listen to the prescribed music.”

It therefore “could be an interesting option for cell-based therapies, especially where the need for frequent dosing raises compliance issues.”

It is a “very exciting piece of work, no doubt,” said Anandwardhan A. Hardikar, PhD, group leader, Diabetes and Islet Biology Group, Translational Health Research Institute, Western Sydney University, Penrith NSW, Australia.

He pointed out that the concept of using music to drive gene expression “is something we’ve known for the last 20 years,” but bringing the different strands of research together to generate cells that can be implanted into mice is “an amazing idea.”

Dr. Hardikar, who was not involved in the study, said, however, the publication of the study as a correspondence “does not allow for a lot of the detail that I would have expected as an academic,” and consequently some questions remain.

The most important is whether the music itself is required to trigger the insulin release, as opposed simply to sounds in general.

Is Music or Sound the “Trigger?”

Music is “frequency, it’s the amplitude of the waveform, and it’s the duration for which those waveforms are present,” he noted, but the same profile can be achieved by cutting up and editing the melody so it becomes a jumble of sounds.

For Dr. Hardikar, the “best control” for the study would be to have no music as well as the edited song, with “bits of pieces” played randomly so “it sounds like it’s the same frequency and amplitude.”

Then it would be clear whether the effect is owing to the “noise, or we have to appreciate the melody.”

The other outstanding question is whether the results “can directly translate to larger animals,” such as humans, Dr. Hardikar said.

The authors point out that when translated into mechanical vibrations in the middle ear, the acoustic waves of music activate mechanosensitive ion channels, a form of trigger that is seen across the animal kingdom.

They go on to highlight that while gene switches have been developed for use in next-generation cell-based therapies for a range of conditions, small-molecular trigger compounds face a number of challenges and may cause adverse effects.

With “traceless triggers” such as light, ultrasound, magnetic fields, radio waves, electricity, and heat also facing issues, there is a “need for new switching modalities.”

The researchers therefore developed a music-inducible cellular control (MUSIC) system, which leverages the known intracellular calcium surge in response to music, via calcium-permeable mechanosensitive channels, to drive the release of biopharmaceuticals from vesicles.

They then generated MUSIC-controlled insulin-releasing cell lines, finding that, using a customized box containing off-the-shelf loudspeakers, they could induce channel activation and insulin release with 60 dB at 50 Hz, which is “within the safe range for the human ear.”

Further experiments revealed that insulin release was greatest at 50-100 Hz, and higher than that seen with potassium chloride, the “gold-standard” depolarization control for calcium channels.

The researchers then showed that with optimal stimulation at 50 Hz and 60 dB, channel activation and subsequent insulin release required at least 3 seconds of continuous music, “which might protect the cellular device from inadvertent activation during everyday activities.”

Next, they examined the impact of different musical genres on insulin release, finding that low-bass heavy popular music and movie soundtracks induced maximum release, while the responses were more diverse to classical and guitar-based music.

Specifically, “We Will Rock You,” by the British rock band Queen, induced the release of 70% of available insulin within 5 minutes and 100% within 15 minutes. This, the team notes, is “similar to the dynamics of glucose-triggered insulin release by human pancreatic islets.”

Exposing the cells to a second music session at different intervals revealed that full insulin refill was achieved within 4 hours, which “would be appropriate to attenuate glycemic excursions associated with typical dietary habits.”

Finally, the researchers tested the system in vivo, constructing a box with two off-the-shelf loudspeakers that focuses acoustic waves, via deflectors, onto the abdomens of mice with type 1 diabetes.

Exposing the mice, which had been implanted with microencapsulated MUSIC cells in the peritoneum, to low-bass acoustic waves at 60 dB (50 m/s2) for 15 minutes allowed them to achieve near wild-type levels of insulin in the blood and restored normoglycemia.

Moreover, “Queen’s song ‘We Will Rock You’ generated sufficient insulin to rapidly attenuate postprandial glycemic excursions during glucose tolerance tests,” the team says.

In contrast, animals without implants, or those that had implants but did not have music immersion, remained severely hyperglycemic, they add.

They also note that the effect was seen only when the sound waves “directly impinge on the skin just above the implantation site” for at least 15 minutes, with no increase in insulin release observed with commercially available headphones or ear plugs, such as Apple AirPods, or with loud environmental noises.

Consequently, “therapeutic MUSIC sessions would still be compatible with listening to other types of music or listening to all types of music via headphones,” the researchers write, and are “compatible with standard drug administration schemes.”

The study was supported by a European Research Council advanced grant and in part by the Swiss National Science Foundation NCCR Molecular Systems Engineering. One author acknowledges the support of the Chinese Scholarship Council.

No relevant financial relationships were declared.

A version of this article appeared on Medscape.com.

Bass-heavy rock music applied directly to the abdomen of diabetic mice implanted with music-sensitive insulin-releasing cells attenuates postprandial glycemic excursions and restores normoglycemia, reveals a series of experiments.

The research was published in The Lancet Diabetes & Endocrinology.

After developing a cell line in which music-sensitive calcium channels triggered the release of insulin-containing vesicles, the researchers conducted a series of studies identifying the optimal frequency, pitch, and volume of sounds for triggering release.

After settling on low-bass heavy popular music, they tested their system on mice with type 1 diabetes that had the insulin-releasing cells implanted in their abdomen. Applying the music directly at 60 dB led to near wild-type levels of insulin in the blood within 15 minutes.

“With only 4 hours required for a full refill, [the system] can provide several therapeutic doses a day,” says Martin Fussenegger, PhD, professor of biotechnology and bioengineering, Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland, and colleagues.

“This would match the typical needs of people with type 2 diabetes consuming three meals a day, and for whom administration of prandial insulin is an established treatment option, as they do not have capability for early postprandial insulin secretion from preformed insulin.”

As the system requires nothing more than portable battery-powered commercially available loudspeakers, the multiple daily dosing of biopharmaceuticals becomes “straightforward in the absence of medical infrastructure or staff, simply by having the patient listen to the prescribed music.”

It therefore “could be an interesting option for cell-based therapies, especially where the need for frequent dosing raises compliance issues.”

It is a “very exciting piece of work, no doubt,” said Anandwardhan A. Hardikar, PhD, group leader, Diabetes and Islet Biology Group, Translational Health Research Institute, Western Sydney University, Penrith NSW, Australia.

He pointed out that the concept of using music to drive gene expression “is something we’ve known for the last 20 years,” but bringing the different strands of research together to generate cells that can be implanted into mice is “an amazing idea.”

Dr. Hardikar, who was not involved in the study, said, however, the publication of the study as a correspondence “does not allow for a lot of the detail that I would have expected as an academic,” and consequently some questions remain.

The most important is whether the music itself is required to trigger the insulin release, as opposed simply to sounds in general.

Is Music or Sound the “Trigger?”

Music is “frequency, it’s the amplitude of the waveform, and it’s the duration for which those waveforms are present,” he noted, but the same profile can be achieved by cutting up and editing the melody so it becomes a jumble of sounds.

For Dr. Hardikar, the “best control” for the study would be to have no music as well as the edited song, with “bits of pieces” played randomly so “it sounds like it’s the same frequency and amplitude.”

Then it would be clear whether the effect is owing to the “noise, or we have to appreciate the melody.”

The other outstanding question is whether the results “can directly translate to larger animals,” such as humans, Dr. Hardikar said.

The authors point out that when translated into mechanical vibrations in the middle ear, the acoustic waves of music activate mechanosensitive ion channels, a form of trigger that is seen across the animal kingdom.

They go on to highlight that while gene switches have been developed for use in next-generation cell-based therapies for a range of conditions, small-molecular trigger compounds face a number of challenges and may cause adverse effects.

With “traceless triggers” such as light, ultrasound, magnetic fields, radio waves, electricity, and heat also facing issues, there is a “need for new switching modalities.”

The researchers therefore developed a music-inducible cellular control (MUSIC) system, which leverages the known intracellular calcium surge in response to music, via calcium-permeable mechanosensitive channels, to drive the release of biopharmaceuticals from vesicles.

They then generated MUSIC-controlled insulin-releasing cell lines, finding that, using a customized box containing off-the-shelf loudspeakers, they could induce channel activation and insulin release with 60 dB at 50 Hz, which is “within the safe range for the human ear.”

Further experiments revealed that insulin release was greatest at 50-100 Hz, and higher than that seen with potassium chloride, the “gold-standard” depolarization control for calcium channels.

The researchers then showed that with optimal stimulation at 50 Hz and 60 dB, channel activation and subsequent insulin release required at least 3 seconds of continuous music, “which might protect the cellular device from inadvertent activation during everyday activities.”

Next, they examined the impact of different musical genres on insulin release, finding that low-bass heavy popular music and movie soundtracks induced maximum release, while the responses were more diverse to classical and guitar-based music.

Specifically, “We Will Rock You,” by the British rock band Queen, induced the release of 70% of available insulin within 5 minutes and 100% within 15 minutes. This, the team notes, is “similar to the dynamics of glucose-triggered insulin release by human pancreatic islets.”

Exposing the cells to a second music session at different intervals revealed that full insulin refill was achieved within 4 hours, which “would be appropriate to attenuate glycemic excursions associated with typical dietary habits.”

Finally, the researchers tested the system in vivo, constructing a box with two off-the-shelf loudspeakers that focuses acoustic waves, via deflectors, onto the abdomens of mice with type 1 diabetes.

Exposing the mice, which had been implanted with microencapsulated MUSIC cells in the peritoneum, to low-bass acoustic waves at 60 dB (50 m/s2) for 15 minutes allowed them to achieve near wild-type levels of insulin in the blood and restored normoglycemia.

Moreover, “Queen’s song ‘We Will Rock You’ generated sufficient insulin to rapidly attenuate postprandial glycemic excursions during glucose tolerance tests,” the team says.

In contrast, animals without implants, or those that had implants but did not have music immersion, remained severely hyperglycemic, they add.

They also note that the effect was seen only when the sound waves “directly impinge on the skin just above the implantation site” for at least 15 minutes, with no increase in insulin release observed with commercially available headphones or ear plugs, such as Apple AirPods, or with loud environmental noises.

Consequently, “therapeutic MUSIC sessions would still be compatible with listening to other types of music or listening to all types of music via headphones,” the researchers write, and are “compatible with standard drug administration schemes.”

The study was supported by a European Research Council advanced grant and in part by the Swiss National Science Foundation NCCR Molecular Systems Engineering. One author acknowledges the support of the Chinese Scholarship Council.

No relevant financial relationships were declared.

A version of this article appeared on Medscape.com.

Bass-heavy rock music applied directly to the abdomen of diabetic mice implanted with music-sensitive insulin-releasing cells attenuates postprandial glycemic excursions and restores normoglycemia, reveals a series of experiments.

The research was published in The Lancet Diabetes & Endocrinology.

After developing a cell line in which music-sensitive calcium channels triggered the release of insulin-containing vesicles, the researchers conducted a series of studies identifying the optimal frequency, pitch, and volume of sounds for triggering release.

After settling on low-bass heavy popular music, they tested their system on mice with type 1 diabetes that had the insulin-releasing cells implanted in their abdomen. Applying the music directly at 60 dB led to near wild-type levels of insulin in the blood within 15 minutes.

“With only 4 hours required for a full refill, [the system] can provide several therapeutic doses a day,” says Martin Fussenegger, PhD, professor of biotechnology and bioengineering, Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland, and colleagues.

“This would match the typical needs of people with type 2 diabetes consuming three meals a day, and for whom administration of prandial insulin is an established treatment option, as they do not have capability for early postprandial insulin secretion from preformed insulin.”

As the system requires nothing more than portable battery-powered commercially available loudspeakers, the multiple daily dosing of biopharmaceuticals becomes “straightforward in the absence of medical infrastructure or staff, simply by having the patient listen to the prescribed music.”

It therefore “could be an interesting option for cell-based therapies, especially where the need for frequent dosing raises compliance issues.”

It is a “very exciting piece of work, no doubt,” said Anandwardhan A. Hardikar, PhD, group leader, Diabetes and Islet Biology Group, Translational Health Research Institute, Western Sydney University, Penrith NSW, Australia.

He pointed out that the concept of using music to drive gene expression “is something we’ve known for the last 20 years,” but bringing the different strands of research together to generate cells that can be implanted into mice is “an amazing idea.”

Dr. Hardikar, who was not involved in the study, said, however, the publication of the study as a correspondence “does not allow for a lot of the detail that I would have expected as an academic,” and consequently some questions remain.

The most important is whether the music itself is required to trigger the insulin release, as opposed simply to sounds in general.

Is Music or Sound the “Trigger?”

Music is “frequency, it’s the amplitude of the waveform, and it’s the duration for which those waveforms are present,” he noted, but the same profile can be achieved by cutting up and editing the melody so it becomes a jumble of sounds.

For Dr. Hardikar, the “best control” for the study would be to have no music as well as the edited song, with “bits of pieces” played randomly so “it sounds like it’s the same frequency and amplitude.”

Then it would be clear whether the effect is owing to the “noise, or we have to appreciate the melody.”

The other outstanding question is whether the results “can directly translate to larger animals,” such as humans, Dr. Hardikar said.

The authors point out that when translated into mechanical vibrations in the middle ear, the acoustic waves of music activate mechanosensitive ion channels, a form of trigger that is seen across the animal kingdom.

They go on to highlight that while gene switches have been developed for use in next-generation cell-based therapies for a range of conditions, small-molecular trigger compounds face a number of challenges and may cause adverse effects.

With “traceless triggers” such as light, ultrasound, magnetic fields, radio waves, electricity, and heat also facing issues, there is a “need for new switching modalities.”

The researchers therefore developed a music-inducible cellular control (MUSIC) system, which leverages the known intracellular calcium surge in response to music, via calcium-permeable mechanosensitive channels, to drive the release of biopharmaceuticals from vesicles.

They then generated MUSIC-controlled insulin-releasing cell lines, finding that, using a customized box containing off-the-shelf loudspeakers, they could induce channel activation and insulin release with 60 dB at 50 Hz, which is “within the safe range for the human ear.”

Further experiments revealed that insulin release was greatest at 50-100 Hz, and higher than that seen with potassium chloride, the “gold-standard” depolarization control for calcium channels.

The researchers then showed that with optimal stimulation at 50 Hz and 60 dB, channel activation and subsequent insulin release required at least 3 seconds of continuous music, “which might protect the cellular device from inadvertent activation during everyday activities.”

Next, they examined the impact of different musical genres on insulin release, finding that low-bass heavy popular music and movie soundtracks induced maximum release, while the responses were more diverse to classical and guitar-based music.

Specifically, “We Will Rock You,” by the British rock band Queen, induced the release of 70% of available insulin within 5 minutes and 100% within 15 minutes. This, the team notes, is “similar to the dynamics of glucose-triggered insulin release by human pancreatic islets.”

Exposing the cells to a second music session at different intervals revealed that full insulin refill was achieved within 4 hours, which “would be appropriate to attenuate glycemic excursions associated with typical dietary habits.”

Finally, the researchers tested the system in vivo, constructing a box with two off-the-shelf loudspeakers that focuses acoustic waves, via deflectors, onto the abdomens of mice with type 1 diabetes.

Exposing the mice, which had been implanted with microencapsulated MUSIC cells in the peritoneum, to low-bass acoustic waves at 60 dB (50 m/s2) for 15 minutes allowed them to achieve near wild-type levels of insulin in the blood and restored normoglycemia.

Moreover, “Queen’s song ‘We Will Rock You’ generated sufficient insulin to rapidly attenuate postprandial glycemic excursions during glucose tolerance tests,” the team says.

In contrast, animals without implants, or those that had implants but did not have music immersion, remained severely hyperglycemic, they add.

They also note that the effect was seen only when the sound waves “directly impinge on the skin just above the implantation site” for at least 15 minutes, with no increase in insulin release observed with commercially available headphones or ear plugs, such as Apple AirPods, or with loud environmental noises.

Consequently, “therapeutic MUSIC sessions would still be compatible with listening to other types of music or listening to all types of music via headphones,” the researchers write, and are “compatible with standard drug administration schemes.”

The study was supported by a European Research Council advanced grant and in part by the Swiss National Science Foundation NCCR Molecular Systems Engineering. One author acknowledges the support of the Chinese Scholarship Council.

No relevant financial relationships were declared.

A version of this article appeared on Medscape.com.

For much of his life, 32-year-old Michael Smith had a war going on in his head.

After a big meal, he knew he should be full. But an inexplicable hunger would drive him to pick up the fork again. 

Cravings for fried chicken or gummy bears overwhelmed him, fueling late-night DoorDash orders that — despite their bounty of fat and sugar — never satisfied him.

He recalls waking up on the couch, half-eaten takeout in his lap, feeling sluggish and out of control. 

“It was like I was food drunk,” recalls Smith, who lives in Boston. “I had a moment I looked at myself in the mirror. I was around 380 pounds, and I said, ‘OK, something has got to give.’ “ 

Smith is among the 42% of U.S. adults living with obesity, a misunderstood and stubbornly hard-to-manage condition that doctors have only recently begun to call a disease. Its root causes have been debated for decades, with studies suggesting everything from genes to lifestyle to a shifting food supply loaded with carbohydrates and ultra-processed foods. Solutions have long targeted self-discipline and a simple “eat less, move more” strategy with remarkably grim results. 

Those who successfully slim down tend to gain back 50% of that weight within 2 years, and 80% within 5 years. Meanwhile, the obesity epidemic marches on.

But a new frontier of brain-based therapies — from GLP-1 agonist drugs thought to act on reward and appetite centers to deep brain stimulation aimed at resetting neural circuits — has kindled hope among patients like Smith and the doctors who treat them. The treatments, and theories behind them, are not without controversy. They’re expensive, have side effects, and, critics contend, pull focus from diet and exercise. 

But most agree that in the battle against obesity, one crucial organ has been overlooked.

“Obesity, in almost all circumstances, is most likely a disorder of the brain,” said Casey Halpern, MD, associate professor of neurosurgery at the University of Pennsylvania. “What these individuals need is not simply more willpower, but the therapeutic equivalent of an electrician that can make right these connections inside their brain.”

A Break in the Machine

Throughout the day, the machine that is our brain is constantly humming in the background, taking in subtle signals from our gut, hormones, and environment to determine when we’re hungry, how food makes us feel, and whether we are taking in enough energy, or expending too much, to survive.

“We like to think that we have control over what we eat, but the brain is also integrating all of these factors that we don’t fully understand in ways that shape our decisions,” said Kevin Hall, PhD, an obesity researcher with the National Institute of Diabetes and Digestive and Kidney Diseases. “I liken it to holding your breath. I can do that for a period of time, and I have some conscious control. But eventually, physiology wins out.”

Mounting evidence suggests that in people with obesity, something in the machine is broken.

One seminal 2001 study in The Lancet suggested that, like people addicted to cocaine or alcohol, they lack receptors to the feel-good brain chemical dopamine and overeat in pursuit of the pleasure they lack. 

A recent study, not yet published, from Dr. Hall’s lab drew a slightly different conclusion, suggesting that people with obesity actually have too much dopamine, filling up those receptors so the pleasure spike from eating doesn’t feel like much.

“It’s kind of like trying to shout in a noisy room. You’re going to have to shout louder to have the same effect,” said Dr. Hall.

Gut-brain pathways that tell us we’re full may also be impaired.

In another study, Yale researchers tube-fed 500 calories of sugar or fat directly into the stomachs of 28 lean people and 30 people with obesity. Then they observed brain activity using functional magnetic resonance imaging (fMRI).

In lean people, about 30 regions of the brain quieted after the meal, including parts of the striatum (associated with cravings).

In those with obesity, the brain barely responded at all. 

“In my clinic, patients will often say ‘I just finished my dinner, but it doesn’t feel like it,’” said senior author Mireille Serlie, MD, PhD, an obesity researcher at the Yale School of Medicine. “It may be that this nutrient-sensing interaction between the gut and the brain is less pronounced or comes too late for them after the meal.”

Dr. Halpern recently identified a brain circuit linking a memory center (hippocampus) to an appetite control region (hypothalamus). In people with obesity and binge eating disorder, the circuit appears jammed. This may cause them to, in a sense, forget they just ate.

“Some of their eating episodes are almost dissociative — they’re not realizing how much they are eating and can’t keep track of it,” he said.

Another brain system works to maintain longer-term homeostasis — or weight stability. Like a set thermostat, it kicks on to trigger hunger and fatigue when it senses we’re low on fat.

The hormone leptin, found in fat cells, sends signals to the hypothalamus to let it know how much energy we have on board.

“If leptin levels go up, it signals the brain that you have too much fat and you should eat less to return to the starting point,” said Rockefeller University geneticist Jeffrey Friedman, MD, PhD, who discovered the hormone in 1994. “If you have too little fat and leptin is low, that will stimulate appetite to return you to the starting point.”

In people with obesity, he said, the thermostat — or set point the body seeks to maintain — is too high.

All this raises a crucial question: How do these circuits and pathways malfunction in the first place?

What Breaks the Brain?

Genes, scientists agree, play a role. 

Studies show that genetics underlie as much as 75% of people’s differences in body mass index (BMI), with certain gene combinations raising obesity risk in particular environments. 

While hundreds of genes are believed to have a small effect, about a dozen single genes are thought to have a large effect. (Notably, most influence brain function.) For instance, about 6% of people with severe obesity since childhood have mutations in a gene called MC4R (melanocortin 4 receptor), which influences leptin signaling.

Still, genetics alone cannot account for the explosion in obesity in the U.S. over the last 50 years, says epidemiologist Deirdre Tobias, ScD, assistant professor of medicine at Harvard Medical School.

At the population level, “our genes don’t change that much in less than a generation,” she said.

But our food supply has.

Ultra-processed foods — those containing hydrogenated oils, high-fructose corn syrup, flavoring agents, emulsifiers, and other manufactured ingredients — now make up about 60% of the food supply.

“The evidence is fairly consistent indicating that there’s something about these foods that is possibly causing obesity,” said Tobias. 

In one telling 2019 study, Dr. Hall and his colleagues brought 20 men and women into a study center to live for a month and tightly controlled their food intake and activity. One group was provided with meals with 80% of calories from ultra-processed food. The other was given meals with no processed food. 

The three daily meals provided had the same calories, sugars, fats, fiber, and carbohydrates, and people were told to eat as much as they wanted.

Those on the ultra-processed diet ate about 500 calories more per day, ate faster, and gained weight. Those on the unprocessed diet lost weight.

“This is a stark example of how, when you can change the food environment, you cause really remarkable changes in food intake without people even being aware that they are overeating,” said Dr. Hall. 

Just what it is about these relatively novel foods that may trigger overeating is unclear. It could be the crunch, the lack of water content, the engineered balance of sugar/salt/fat, their easy-to-devour texture, or something else. 

Some research suggests that the foods may interfere with gut-brain signaling that tells the brain you’re full. 

“Evidence is amassing that the nutritional content of processed foods is not accurately conveyed to the brain,” Dana M. Small, PhD, a neuroscientist at Yale, wrote in a recent perspective paper in Science. 

Even more concerning: Some animal studies suggest processed foods reprogram the brain to dislike healthy foods.

And once these brain changes are made, they are hard to reverse.

“The problem is, our brain is not wired for this,” said Dr. Halpern. “We are not evolved to eat the food we are eating, so our brain adapts, but it adapts in a negative way that puts us at risk.”

That’s why changing the food environment via public policy must be part of the solution in combating obesity, Dr. Tobias said.

A New Era of Brain-Based Solutions

In the spring of 2021, after years of trying and failing to lose weight via the “move more, eat less” model, Michael Smith began to take a medication called Vyvanse. The drug was approved in 2008 for attention deficit hyperactivity disorder, but since it also influences levels of the hormones dopamine and norepinephrine to reduce cravings, it is now frequently prescribed for binge eating disorder.

“That was pretty much how I got rid of my first 60 to 70 pounds,” Smith said.

A few months later, after he hit a plateau, he had surgery to shrink the size of his stomach — a decision he now second-guesses. 

While it kept him from overeating for a time, the fried chicken and gummy bear cravings returned a few months later.

His doctor, Fatima Cody Stanford, MD, put him on a second medication: semaglutide, or Wegovy, the weekly shot approved for weight loss in 2021. It works, in part, by mimicking glucagon-like peptide-1 (GLP-1), a key gut hormone that lets your brain know you are full. 

The weight began to fall off again.

Smith’s success story is just one of many that Dr. Stanford, an obesity medicine doctor-scientist at Harvard, has heard in her office in recent years.

“I do not believe these drugs are a panacea,” she said. “There are nonresponders, and those are the patients I take off the medication. But for the high-responders, and there are many of them, they are telling me, ‘Oh my gosh. For the first time in my life, I am not constantly thinking about eating. My life has changed.’” 

A Multi-Pronged Approach

Dr. Halpern, at Penn, has also been hearing success stories.

In recent years, he has placed permanent electrodes in the brains of three people with grade III, or severe, obesity and binge eating disorder. 

All had tried exercise, dieting, support groups, medication, and weight loss surgery to no avail.

The electrodes modulate an area in the center of the brain called the nucleus accumbens, which in mice studies has been shown to reduce cravings when stimulated.

Thus far, all three are seeing promising results.

“It’s not like I don’t think about food at all,” one of them, Robyn Baldwin, told The New York Times. “But I’m no longer a craving person.”

Dr. Halpern is now extending the trial to more patients and hopes to ultimately include other areas of the brain, including those that involve memory.

He imagines a day when people with severe obesity, who have failed conventional treatments, can walk into a clinic and have their brain circuits assessed to see which ones may be misfiring.

Many might find relief with noninvasive brain stimulation, like transcranial magnetic stimulation (already in use for depression). Others might need a more extreme approach, like the deep brain stimulation, or DBS, therapy Dr. Halpern used.

“Obviously, DBS is hard to scale, so it would have to be reserved for the most severe patients,” he said.

Still, not everyone believes brain-based drugs and surgeries are the answer. 

David Ludwig, MD, PhD, a professor of nutrition at the Harvard School of Public Health, played a key role in the discovery of GLP-1 and acknowledges that “of course” the brain influences body composition. But to him, explaining obesity as a disease of the brain oversimplifies it, discounting metabolic factors such as a tendency to store too much fat.

He noted that it’s hard to get drug companies, or any agencies, to fund large clinical trials on simple things like low-carbohydrate diets or exercise programs.

“We need all the tools we can get in the battle against the obesity epidemic, and new technologies are worth exploring,” he said. “However, the success of these drugs should not lead us to deprioritize diet and lifestyle interventions.” 

Dr. Stanford, who has received consulting fees from Wegovy, believes the future of treatment lies in a multi-pronged approach, with surgery, medication, and lifestyle changes coalescing in a lasting, but fragile, remission.

“Unfortunately, there is no cure for obesity,” said Dr. Stanford, whose patients often have setbacks and must try new strategies. “There are treatments that work for a while, but they are constantly pushing up against this origin in the brain.”

Smith says understanding this has been a big part of his success.

He is now a leaner and healthier 5-foot-6 and 204 pounds. In addition to taking his medication, he walks to work, goes to the gym twice a week, limits his portions, and tries to reframe the way he thinks about food, viewing it as fuel rather than an indulgence.

Sometimes, when he looks in the mirror, he is reminded of his 380-pound self, and it scares him. He doesn’t want to go back there. He’s confident now that he won’t have to.

“There is this misconception out there that you just need to put the fork down, but I’m learning it’s more complicated than that,” he said. “I intend to treat this as the illness that it is and do what I need to combat it so I’m able to keep this new reality I have built for myself.”
 

A version of this article appeared on WebMD.com .

For much of his life, 32-year-old Michael Smith had a war going on in his head.

After a big meal, he knew he should be full. But an inexplicable hunger would drive him to pick up the fork again. 

Cravings for fried chicken or gummy bears overwhelmed him, fueling late-night DoorDash orders that — despite their bounty of fat and sugar — never satisfied him.

He recalls waking up on the couch, half-eaten takeout in his lap, feeling sluggish and out of control. 

“It was like I was food drunk,” recalls Smith, who lives in Boston. “I had a moment I looked at myself in the mirror. I was around 380 pounds, and I said, ‘OK, something has got to give.’ “ 

Smith is among the 42% of U.S. adults living with obesity, a misunderstood and stubbornly hard-to-manage condition that doctors have only recently begun to call a disease. Its root causes have been debated for decades, with studies suggesting everything from genes to lifestyle to a shifting food supply loaded with carbohydrates and ultra-processed foods. Solutions have long targeted self-discipline and a simple “eat less, move more” strategy with remarkably grim results. 

Those who successfully slim down tend to gain back 50% of that weight within 2 years, and 80% within 5 years. Meanwhile, the obesity epidemic marches on.

But a new frontier of brain-based therapies — from GLP-1 agonist drugs thought to act on reward and appetite centers to deep brain stimulation aimed at resetting neural circuits — has kindled hope among patients like Smith and the doctors who treat them. The treatments, and theories behind them, are not without controversy. They’re expensive, have side effects, and, critics contend, pull focus from diet and exercise. 

But most agree that in the battle against obesity, one crucial organ has been overlooked.

“Obesity, in almost all circumstances, is most likely a disorder of the brain,” said Casey Halpern, MD, associate professor of neurosurgery at the University of Pennsylvania. “What these individuals need is not simply more willpower, but the therapeutic equivalent of an electrician that can make right these connections inside their brain.”

A Break in the Machine

Throughout the day, the machine that is our brain is constantly humming in the background, taking in subtle signals from our gut, hormones, and environment to determine when we’re hungry, how food makes us feel, and whether we are taking in enough energy, or expending too much, to survive.

“We like to think that we have control over what we eat, but the brain is also integrating all of these factors that we don’t fully understand in ways that shape our decisions,” said Kevin Hall, PhD, an obesity researcher with the National Institute of Diabetes and Digestive and Kidney Diseases. “I liken it to holding your breath. I can do that for a period of time, and I have some conscious control. But eventually, physiology wins out.”

Mounting evidence suggests that in people with obesity, something in the machine is broken.

One seminal 2001 study in The Lancet suggested that, like people addicted to cocaine or alcohol, they lack receptors to the feel-good brain chemical dopamine and overeat in pursuit of the pleasure they lack. 

A recent study, not yet published, from Dr. Hall’s lab drew a slightly different conclusion, suggesting that people with obesity actually have too much dopamine, filling up those receptors so the pleasure spike from eating doesn’t feel like much.

“It’s kind of like trying to shout in a noisy room. You’re going to have to shout louder to have the same effect,” said Dr. Hall.

Gut-brain pathways that tell us we’re full may also be impaired.

In another study, Yale researchers tube-fed 500 calories of sugar or fat directly into the stomachs of 28 lean people and 30 people with obesity. Then they observed brain activity using functional magnetic resonance imaging (fMRI).

In lean people, about 30 regions of the brain quieted after the meal, including parts of the striatum (associated with cravings).

In those with obesity, the brain barely responded at all. 

“In my clinic, patients will often say ‘I just finished my dinner, but it doesn’t feel like it,’” said senior author Mireille Serlie, MD, PhD, an obesity researcher at the Yale School of Medicine. “It may be that this nutrient-sensing interaction between the gut and the brain is less pronounced or comes too late for them after the meal.”

Dr. Halpern recently identified a brain circuit linking a memory center (hippocampus) to an appetite control region (hypothalamus). In people with obesity and binge eating disorder, the circuit appears jammed. This may cause them to, in a sense, forget they just ate.

“Some of their eating episodes are almost dissociative — they’re not realizing how much they are eating and can’t keep track of it,” he said.

Another brain system works to maintain longer-term homeostasis — or weight stability. Like a set thermostat, it kicks on to trigger hunger and fatigue when it senses we’re low on fat.

The hormone leptin, found in fat cells, sends signals to the hypothalamus to let it know how much energy we have on board.

“If leptin levels go up, it signals the brain that you have too much fat and you should eat less to return to the starting point,” said Rockefeller University geneticist Jeffrey Friedman, MD, PhD, who discovered the hormone in 1994. “If you have too little fat and leptin is low, that will stimulate appetite to return you to the starting point.”

In people with obesity, he said, the thermostat — or set point the body seeks to maintain — is too high.

All this raises a crucial question: How do these circuits and pathways malfunction in the first place?

What Breaks the Brain?

Genes, scientists agree, play a role. 

Studies show that genetics underlie as much as 75% of people’s differences in body mass index (BMI), with certain gene combinations raising obesity risk in particular environments. 

While hundreds of genes are believed to have a small effect, about a dozen single genes are thought to have a large effect. (Notably, most influence brain function.) For instance, about 6% of people with severe obesity since childhood have mutations in a gene called MC4R (melanocortin 4 receptor), which influences leptin signaling.

Still, genetics alone cannot account for the explosion in obesity in the U.S. over the last 50 years, says epidemiologist Deirdre Tobias, ScD, assistant professor of medicine at Harvard Medical School.

At the population level, “our genes don’t change that much in less than a generation,” she said.

But our food supply has.

Ultra-processed foods — those containing hydrogenated oils, high-fructose corn syrup, flavoring agents, emulsifiers, and other manufactured ingredients — now make up about 60% of the food supply.

“The evidence is fairly consistent indicating that there’s something about these foods that is possibly causing obesity,” said Tobias. 

In one telling 2019 study, Dr. Hall and his colleagues brought 20 men and women into a study center to live for a month and tightly controlled their food intake and activity. One group was provided with meals with 80% of calories from ultra-processed food. The other was given meals with no processed food. 

The three daily meals provided had the same calories, sugars, fats, fiber, and carbohydrates, and people were told to eat as much as they wanted.

Those on the ultra-processed diet ate about 500 calories more per day, ate faster, and gained weight. Those on the unprocessed diet lost weight.

“This is a stark example of how, when you can change the food environment, you cause really remarkable changes in food intake without people even being aware that they are overeating,” said Dr. Hall. 

Just what it is about these relatively novel foods that may trigger overeating is unclear. It could be the crunch, the lack of water content, the engineered balance of sugar/salt/fat, their easy-to-devour texture, or something else. 

Some research suggests that the foods may interfere with gut-brain signaling that tells the brain you’re full. 

“Evidence is amassing that the nutritional content of processed foods is not accurately conveyed to the brain,” Dana M. Small, PhD, a neuroscientist at Yale, wrote in a recent perspective paper in Science. 

Even more concerning: Some animal studies suggest processed foods reprogram the brain to dislike healthy foods.

And once these brain changes are made, they are hard to reverse.

“The problem is, our brain is not wired for this,” said Dr. Halpern. “We are not evolved to eat the food we are eating, so our brain adapts, but it adapts in a negative way that puts us at risk.”

That’s why changing the food environment via public policy must be part of the solution in combating obesity, Dr. Tobias said.

A New Era of Brain-Based Solutions

In the spring of 2021, after years of trying and failing to lose weight via the “move more, eat less” model, Michael Smith began to take a medication called Vyvanse. The drug was approved in 2008 for attention deficit hyperactivity disorder, but since it also influences levels of the hormones dopamine and norepinephrine to reduce cravings, it is now frequently prescribed for binge eating disorder.

“That was pretty much how I got rid of my first 60 to 70 pounds,” Smith said.

A few months later, after he hit a plateau, he had surgery to shrink the size of his stomach — a decision he now second-guesses. 

While it kept him from overeating for a time, the fried chicken and gummy bear cravings returned a few months later.

His doctor, Fatima Cody Stanford, MD, put him on a second medication: semaglutide, or Wegovy, the weekly shot approved for weight loss in 2021. It works, in part, by mimicking glucagon-like peptide-1 (GLP-1), a key gut hormone that lets your brain know you are full. 

The weight began to fall off again.

Smith’s success story is just one of many that Dr. Stanford, an obesity medicine doctor-scientist at Harvard, has heard in her office in recent years.

“I do not believe these drugs are a panacea,” she said. “There are nonresponders, and those are the patients I take off the medication. But for the high-responders, and there are many of them, they are telling me, ‘Oh my gosh. For the first time in my life, I am not constantly thinking about eating. My life has changed.’” 

A Multi-Pronged Approach

Dr. Halpern, at Penn, has also been hearing success stories.

In recent years, he has placed permanent electrodes in the brains of three people with grade III, or severe, obesity and binge eating disorder. 

All had tried exercise, dieting, support groups, medication, and weight loss surgery to no avail.

The electrodes modulate an area in the center of the brain called the nucleus accumbens, which in mice studies has been shown to reduce cravings when stimulated.

Thus far, all three are seeing promising results.

“It’s not like I don’t think about food at all,” one of them, Robyn Baldwin, told The New York Times. “But I’m no longer a craving person.”

Dr. Halpern is now extending the trial to more patients and hopes to ultimately include other areas of the brain, including those that involve memory.

He imagines a day when people with severe obesity, who have failed conventional treatments, can walk into a clinic and have their brain circuits assessed to see which ones may be misfiring.

Many might find relief with noninvasive brain stimulation, like transcranial magnetic stimulation (already in use for depression). Others might need a more extreme approach, like the deep brain stimulation, or DBS, therapy Dr. Halpern used.

“Obviously, DBS is hard to scale, so it would have to be reserved for the most severe patients,” he said.

Still, not everyone believes brain-based drugs and surgeries are the answer. 

David Ludwig, MD, PhD, a professor of nutrition at the Harvard School of Public Health, played a key role in the discovery of GLP-1 and acknowledges that “of course” the brain influences body composition. But to him, explaining obesity as a disease of the brain oversimplifies it, discounting metabolic factors such as a tendency to store too much fat.

He noted that it’s hard to get drug companies, or any agencies, to fund large clinical trials on simple things like low-carbohydrate diets or exercise programs.

“We need all the tools we can get in the battle against the obesity epidemic, and new technologies are worth exploring,” he said. “However, the success of these drugs should not lead us to deprioritize diet and lifestyle interventions.” 

Dr. Stanford, who has received consulting fees from Wegovy, believes the future of treatment lies in a multi-pronged approach, with surgery, medication, and lifestyle changes coalescing in a lasting, but fragile, remission.

“Unfortunately, there is no cure for obesity,” said Dr. Stanford, whose patients often have setbacks and must try new strategies. “There are treatments that work for a while, but they are constantly pushing up against this origin in the brain.”

Smith says understanding this has been a big part of his success.

He is now a leaner and healthier 5-foot-6 and 204 pounds. In addition to taking his medication, he walks to work, goes to the gym twice a week, limits his portions, and tries to reframe the way he thinks about food, viewing it as fuel rather than an indulgence.

Sometimes, when he looks in the mirror, he is reminded of his 380-pound self, and it scares him. He doesn’t want to go back there. He’s confident now that he won’t have to.

“There is this misconception out there that you just need to put the fork down, but I’m learning it’s more complicated than that,” he said. “I intend to treat this as the illness that it is and do what I need to combat it so I’m able to keep this new reality I have built for myself.”
 

A version of this article appeared on WebMD.com .

For much of his life, 32-year-old Michael Smith had a war going on in his head.

After a big meal, he knew he should be full. But an inexplicable hunger would drive him to pick up the fork again. 

Cravings for fried chicken or gummy bears overwhelmed him, fueling late-night DoorDash orders that — despite their bounty of fat and sugar — never satisfied him.

He recalls waking up on the couch, half-eaten takeout in his lap, feeling sluggish and out of control. 

“It was like I was food drunk,” recalls Smith, who lives in Boston. “I had a moment I looked at myself in the mirror. I was around 380 pounds, and I said, ‘OK, something has got to give.’ “ 

Smith is among the 42% of U.S. adults living with obesity, a misunderstood and stubbornly hard-to-manage condition that doctors have only recently begun to call a disease. Its root causes have been debated for decades, with studies suggesting everything from genes to lifestyle to a shifting food supply loaded with carbohydrates and ultra-processed foods. Solutions have long targeted self-discipline and a simple “eat less, move more” strategy with remarkably grim results. 

Those who successfully slim down tend to gain back 50% of that weight within 2 years, and 80% within 5 years. Meanwhile, the obesity epidemic marches on.

But a new frontier of brain-based therapies — from GLP-1 agonist drugs thought to act on reward and appetite centers to deep brain stimulation aimed at resetting neural circuits — has kindled hope among patients like Smith and the doctors who treat them. The treatments, and theories behind them, are not without controversy. They’re expensive, have side effects, and, critics contend, pull focus from diet and exercise. 

But most agree that in the battle against obesity, one crucial organ has been overlooked.

“Obesity, in almost all circumstances, is most likely a disorder of the brain,” said Casey Halpern, MD, associate professor of neurosurgery at the University of Pennsylvania. “What these individuals need is not simply more willpower, but the therapeutic equivalent of an electrician that can make right these connections inside their brain.”

A Break in the Machine

Throughout the day, the machine that is our brain is constantly humming in the background, taking in subtle signals from our gut, hormones, and environment to determine when we’re hungry, how food makes us feel, and whether we are taking in enough energy, or expending too much, to survive.

“We like to think that we have control over what we eat, but the brain is also integrating all of these factors that we don’t fully understand in ways that shape our decisions,” said Kevin Hall, PhD, an obesity researcher with the National Institute of Diabetes and Digestive and Kidney Diseases. “I liken it to holding your breath. I can do that for a period of time, and I have some conscious control. But eventually, physiology wins out.”

Mounting evidence suggests that in people with obesity, something in the machine is broken.

One seminal 2001 study in The Lancet suggested that, like people addicted to cocaine or alcohol, they lack receptors to the feel-good brain chemical dopamine and overeat in pursuit of the pleasure they lack. 

A recent study, not yet published, from Dr. Hall’s lab drew a slightly different conclusion, suggesting that people with obesity actually have too much dopamine, filling up those receptors so the pleasure spike from eating doesn’t feel like much.

“It’s kind of like trying to shout in a noisy room. You’re going to have to shout louder to have the same effect,” said Dr. Hall.

Gut-brain pathways that tell us we’re full may also be impaired.

In another study, Yale researchers tube-fed 500 calories of sugar or fat directly into the stomachs of 28 lean people and 30 people with obesity. Then they observed brain activity using functional magnetic resonance imaging (fMRI).

In lean people, about 30 regions of the brain quieted after the meal, including parts of the striatum (associated with cravings).

In those with obesity, the brain barely responded at all. 

“In my clinic, patients will often say ‘I just finished my dinner, but it doesn’t feel like it,’” said senior author Mireille Serlie, MD, PhD, an obesity researcher at the Yale School of Medicine. “It may be that this nutrient-sensing interaction between the gut and the brain is less pronounced or comes too late for them after the meal.”

Dr. Halpern recently identified a brain circuit linking a memory center (hippocampus) to an appetite control region (hypothalamus). In people with obesity and binge eating disorder, the circuit appears jammed. This may cause them to, in a sense, forget they just ate.

“Some of their eating episodes are almost dissociative — they’re not realizing how much they are eating and can’t keep track of it,” he said.

Another brain system works to maintain longer-term homeostasis — or weight stability. Like a set thermostat, it kicks on to trigger hunger and fatigue when it senses we’re low on fat.

The hormone leptin, found in fat cells, sends signals to the hypothalamus to let it know how much energy we have on board.

“If leptin levels go up, it signals the brain that you have too much fat and you should eat less to return to the starting point,” said Rockefeller University geneticist Jeffrey Friedman, MD, PhD, who discovered the hormone in 1994. “If you have too little fat and leptin is low, that will stimulate appetite to return you to the starting point.”

In people with obesity, he said, the thermostat — or set point the body seeks to maintain — is too high.

All this raises a crucial question: How do these circuits and pathways malfunction in the first place?

What Breaks the Brain?

Genes, scientists agree, play a role. 

Studies show that genetics underlie as much as 75% of people’s differences in body mass index (BMI), with certain gene combinations raising obesity risk in particular environments. 

While hundreds of genes are believed to have a small effect, about a dozen single genes are thought to have a large effect. (Notably, most influence brain function.) For instance, about 6% of people with severe obesity since childhood have mutations in a gene called MC4R (melanocortin 4 receptor), which influences leptin signaling.

Still, genetics alone cannot account for the explosion in obesity in the U.S. over the last 50 years, says epidemiologist Deirdre Tobias, ScD, assistant professor of medicine at Harvard Medical School.

At the population level, “our genes don’t change that much in less than a generation,” she said.

But our food supply has.

Ultra-processed foods — those containing hydrogenated oils, high-fructose corn syrup, flavoring agents, emulsifiers, and other manufactured ingredients — now make up about 60% of the food supply.

“The evidence is fairly consistent indicating that there’s something about these foods that is possibly causing obesity,” said Tobias. 

In one telling 2019 study, Dr. Hall and his colleagues brought 20 men and women into a study center to live for a month and tightly controlled their food intake and activity. One group was provided with meals with 80% of calories from ultra-processed food. The other was given meals with no processed food. 

The three daily meals provided had the same calories, sugars, fats, fiber, and carbohydrates, and people were told to eat as much as they wanted.

Those on the ultra-processed diet ate about 500 calories more per day, ate faster, and gained weight. Those on the unprocessed diet lost weight.

“This is a stark example of how, when you can change the food environment, you cause really remarkable changes in food intake without people even being aware that they are overeating,” said Dr. Hall. 

Just what it is about these relatively novel foods that may trigger overeating is unclear. It could be the crunch, the lack of water content, the engineered balance of sugar/salt/fat, their easy-to-devour texture, or something else. 

Some research suggests that the foods may interfere with gut-brain signaling that tells the brain you’re full. 

“Evidence is amassing that the nutritional content of processed foods is not accurately conveyed to the brain,” Dana M. Small, PhD, a neuroscientist at Yale, wrote in a recent perspective paper in Science. 

Even more concerning: Some animal studies suggest processed foods reprogram the brain to dislike healthy foods.

And once these brain changes are made, they are hard to reverse.

“The problem is, our brain is not wired for this,” said Dr. Halpern. “We are not evolved to eat the food we are eating, so our brain adapts, but it adapts in a negative way that puts us at risk.”

That’s why changing the food environment via public policy must be part of the solution in combating obesity, Dr. Tobias said.

A New Era of Brain-Based Solutions

In the spring of 2021, after years of trying and failing to lose weight via the “move more, eat less” model, Michael Smith began to take a medication called Vyvanse. The drug was approved in 2008 for attention deficit hyperactivity disorder, but since it also influences levels of the hormones dopamine and norepinephrine to reduce cravings, it is now frequently prescribed for binge eating disorder.

“That was pretty much how I got rid of my first 60 to 70 pounds,” Smith said.

A few months later, after he hit a plateau, he had surgery to shrink the size of his stomach — a decision he now second-guesses. 

While it kept him from overeating for a time, the fried chicken and gummy bear cravings returned a few months later.

His doctor, Fatima Cody Stanford, MD, put him on a second medication: semaglutide, or Wegovy, the weekly shot approved for weight loss in 2021. It works, in part, by mimicking glucagon-like peptide-1 (GLP-1), a key gut hormone that lets your brain know you are full. 

The weight began to fall off again.

Smith’s success story is just one of many that Dr. Stanford, an obesity medicine doctor-scientist at Harvard, has heard in her office in recent years.

“I do not believe these drugs are a panacea,” she said. “There are nonresponders, and those are the patients I take off the medication. But for the high-responders, and there are many of them, they are telling me, ‘Oh my gosh. For the first time in my life, I am not constantly thinking about eating. My life has changed.’” 

A Multi-Pronged Approach

Dr. Halpern, at Penn, has also been hearing success stories.

In recent years, he has placed permanent electrodes in the brains of three people with grade III, or severe, obesity and binge eating disorder. 

All had tried exercise, dieting, support groups, medication, and weight loss surgery to no avail.

The electrodes modulate an area in the center of the brain called the nucleus accumbens, which in mice studies has been shown to reduce cravings when stimulated.

Thus far, all three are seeing promising results.

“It’s not like I don’t think about food at all,” one of them, Robyn Baldwin, told The New York Times. “But I’m no longer a craving person.”

Dr. Halpern is now extending the trial to more patients and hopes to ultimately include other areas of the brain, including those that involve memory.

He imagines a day when people with severe obesity, who have failed conventional treatments, can walk into a clinic and have their brain circuits assessed to see which ones may be misfiring.

Many might find relief with noninvasive brain stimulation, like transcranial magnetic stimulation (already in use for depression). Others might need a more extreme approach, like the deep brain stimulation, or DBS, therapy Dr. Halpern used.

“Obviously, DBS is hard to scale, so it would have to be reserved for the most severe patients,” he said.

Still, not everyone believes brain-based drugs and surgeries are the answer. 

David Ludwig, MD, PhD, a professor of nutrition at the Harvard School of Public Health, played a key role in the discovery of GLP-1 and acknowledges that “of course” the brain influences body composition. But to him, explaining obesity as a disease of the brain oversimplifies it, discounting metabolic factors such as a tendency to store too much fat.

He noted that it’s hard to get drug companies, or any agencies, to fund large clinical trials on simple things like low-carbohydrate diets or exercise programs.

“We need all the tools we can get in the battle against the obesity epidemic, and new technologies are worth exploring,” he said. “However, the success of these drugs should not lead us to deprioritize diet and lifestyle interventions.” 

Dr. Stanford, who has received consulting fees from Wegovy, believes the future of treatment lies in a multi-pronged approach, with surgery, medication, and lifestyle changes coalescing in a lasting, but fragile, remission.

“Unfortunately, there is no cure for obesity,” said Dr. Stanford, whose patients often have setbacks and must try new strategies. “There are treatments that work for a while, but they are constantly pushing up against this origin in the brain.”

Smith says understanding this has been a big part of his success.

He is now a leaner and healthier 5-foot-6 and 204 pounds. In addition to taking his medication, he walks to work, goes to the gym twice a week, limits his portions, and tries to reframe the way he thinks about food, viewing it as fuel rather than an indulgence.

Sometimes, when he looks in the mirror, he is reminded of his 380-pound self, and it scares him. He doesn’t want to go back there. He’s confident now that he won’t have to.

“There is this misconception out there that you just need to put the fork down, but I’m learning it’s more complicated than that,” he said. “I intend to treat this as the illness that it is and do what I need to combat it so I’m able to keep this new reality I have built for myself.”
 

A version of this article appeared on WebMD.com .

UnitedHealth Group, the parent company of the nation’s largest private insurer, UnitedHealthcare (UHC), is now affiliated with or employs approximately 10% of the US physician workforce, raising anti-trust and noncompete concerns as more payers and private equity firms pursue medical practice acquisitions.

The company added 20,000 physicians in the last year alone, including a previously physician-owned multispecialty group practice of 400 doctors in New York. They join the growing web of doctors — about 90,000 of the 950,000 active US physicians — working for the UnitedHealth Group subsidiary, Optum Health, providing primary, specialty, urgent, and surgical care. Amar Desai, MD, chief executive officer of Optum Health, shared the updated workforce numbers during the health care conglomerate’s annual investor conference.

Health care mergers and consolidations have become more common as physician groups struggle to stay afloat amid dwindling payer reimbursements. Although private equity and health systems often acquire practices, payers like UHC are increasingly doing so as part of their model to advance value-based care. 

Yashaswini Singh, PhD, health care economist and assistant professor of health services, policy, and practice at Brown University, says such moves mirror the broader trend in corporate consolidation of physician practices. She said in an interview that the integrated models could possibly enhance care coordination and improve outcomes, but the impact of payer-led consolidation has not been extensively studied. 

Meanwhile, evidence considering private equity ownership is just emerging. In a 2022 study published in JAMA Health Forum, with Dr. Singh as lead author, findings showed that private equity involvement increased healthcare spending through higher prices and utilization. 

Consolidation can also raise anti-trust concerns. “If payers incentivize referral patterns of their employed physicians to favor other physicians employed by the payer, it can reduce competition by restricting consumer choice,” said Dr. Singh. 

A potential merger between Cigna and Humana that could happen by the end of the year will likely face intense scrutiny as it would create a company that rivals the size of UnitedHealth Group or CVS Health. If it goes through, the duo could streamline its insurance offerings and leverage each other’s care delivery platforms, clinics, and provider workforce. 

The Biden Administration has sought to strengthen anti-trust statutes to prevent industry monopolies and consumer harm, and the US Department of Justice and Federal Trade Commission have proposed new merger guidelines that have yet to be finalized. 

According to Dr. Singh, some of Optum’s medical practice purchases may bypass anti-trust statutes since most prospective mergers and acquisitions are reviewed only if they exceed a specific value ($101 million for 2023). Limited transparency in ownership structures further complicates matters. Plus, Dr. Singh said instances where physicians are hired instead of acquired through mergers would not be subject to current anti-trust laws. 

The ‘corporatization’ of health care is not good for patients or physicians, said Robert McNamara, MD, chief medical officer of the American Academy of Emergency Medicine Physician Group and cofounder of Take Medicine Back, a physician group advocating to remove corporate interests from health care. 

“If you ask a physician what causes them the most moral conflict, they’ll tell you it’s the insurance companies denying something they want to do for their patients,” he said. “To have the doctors now working for the insurance industry conflicts with a physician’s duty to put the patient first.” 

Dr. McNamara, chair of emergency medicine at Temple University’s Katz School of Medicine, said in an interview that more than half the states in the United States have laws or court rulings that support protecting physician autonomy from corporate interests. Still, he hopes a federal prohibition on private equity’s involvement in healthcare can soon gain traction. In November, Take Medicine Back raised a resolution at the American Medical Association’s interim House of Delegates meeting, which he said was subsequently referred to a committee. 

Emergency medicine was among the first specialties to succumb to private equity firms, but Dr. McNamara said that all types of health care providers and entities — from cardiology and urology to addiction treatment centers and nursing homes — are being swallowed up by larger organizations, including payers. 

UHC was named in a class action suit recently for allegedly shirking doctors’ orders and relying on a flawed algorithm to determine the length of skilled nursing facility stays for Medicare Advantage policyholders. 

At the investor meeting, Dr. Desai reiterated Optum’s desire to continue expanding care delivery options, especially in its pharmacy and behavioral health business lines, and focus on adopting value-based care. He credited the rapid growth to developing strong relationships with providers and standardizing technology and clinical systems.

A version of this article appeared on Medscape.com.

UnitedHealth Group, the parent company of the nation’s largest private insurer, UnitedHealthcare (UHC), is now affiliated with or employs approximately 10% of the US physician workforce, raising anti-trust and noncompete concerns as more payers and private equity firms pursue medical practice acquisitions.

The company added 20,000 physicians in the last year alone, including a previously physician-owned multispecialty group practice of 400 doctors in New York. They join the growing web of doctors — about 90,000 of the 950,000 active US physicians — working for the UnitedHealth Group subsidiary, Optum Health, providing primary, specialty, urgent, and surgical care. Amar Desai, MD, chief executive officer of Optum Health, shared the updated workforce numbers during the health care conglomerate’s annual investor conference.

Health care mergers and consolidations have become more common as physician groups struggle to stay afloat amid dwindling payer reimbursements. Although private equity and health systems often acquire practices, payers like UHC are increasingly doing so as part of their model to advance value-based care. 

Yashaswini Singh, PhD, health care economist and assistant professor of health services, policy, and practice at Brown University, says such moves mirror the broader trend in corporate consolidation of physician practices. She said in an interview that the integrated models could possibly enhance care coordination and improve outcomes, but the impact of payer-led consolidation has not been extensively studied. 

Meanwhile, evidence considering private equity ownership is just emerging. In a 2022 study published in JAMA Health Forum, with Dr. Singh as lead author, findings showed that private equity involvement increased healthcare spending through higher prices and utilization. 

Consolidation can also raise anti-trust concerns. “If payers incentivize referral patterns of their employed physicians to favor other physicians employed by the payer, it can reduce competition by restricting consumer choice,” said Dr. Singh. 

A potential merger between Cigna and Humana that could happen by the end of the year will likely face intense scrutiny as it would create a company that rivals the size of UnitedHealth Group or CVS Health. If it goes through, the duo could streamline its insurance offerings and leverage each other’s care delivery platforms, clinics, and provider workforce. 

The Biden Administration has sought to strengthen anti-trust statutes to prevent industry monopolies and consumer harm, and the US Department of Justice and Federal Trade Commission have proposed new merger guidelines that have yet to be finalized. 

According to Dr. Singh, some of Optum’s medical practice purchases may bypass anti-trust statutes since most prospective mergers and acquisitions are reviewed only if they exceed a specific value ($101 million for 2023). Limited transparency in ownership structures further complicates matters. Plus, Dr. Singh said instances where physicians are hired instead of acquired through mergers would not be subject to current anti-trust laws. 

The ‘corporatization’ of health care is not good for patients or physicians, said Robert McNamara, MD, chief medical officer of the American Academy of Emergency Medicine Physician Group and cofounder of Take Medicine Back, a physician group advocating to remove corporate interests from health care. 

“If you ask a physician what causes them the most moral conflict, they’ll tell you it’s the insurance companies denying something they want to do for their patients,” he said. “To have the doctors now working for the insurance industry conflicts with a physician’s duty to put the patient first.” 

Dr. McNamara, chair of emergency medicine at Temple University’s Katz School of Medicine, said in an interview that more than half the states in the United States have laws or court rulings that support protecting physician autonomy from corporate interests. Still, he hopes a federal prohibition on private equity’s involvement in healthcare can soon gain traction. In November, Take Medicine Back raised a resolution at the American Medical Association’s interim House of Delegates meeting, which he said was subsequently referred to a committee. 

Emergency medicine was among the first specialties to succumb to private equity firms, but Dr. McNamara said that all types of health care providers and entities — from cardiology and urology to addiction treatment centers and nursing homes — are being swallowed up by larger organizations, including payers. 

UHC was named in a class action suit recently for allegedly shirking doctors’ orders and relying on a flawed algorithm to determine the length of skilled nursing facility stays for Medicare Advantage policyholders. 

At the investor meeting, Dr. Desai reiterated Optum’s desire to continue expanding care delivery options, especially in its pharmacy and behavioral health business lines, and focus on adopting value-based care. He credited the rapid growth to developing strong relationships with providers and standardizing technology and clinical systems.

A version of this article appeared on Medscape.com.

UnitedHealth Group, the parent company of the nation’s largest private insurer, UnitedHealthcare (UHC), is now affiliated with or employs approximately 10% of the US physician workforce, raising anti-trust and noncompete concerns as more payers and private equity firms pursue medical practice acquisitions.

The company added 20,000 physicians in the last year alone, including a previously physician-owned multispecialty group practice of 400 doctors in New York. They join the growing web of doctors — about 90,000 of the 950,000 active US physicians — working for the UnitedHealth Group subsidiary, Optum Health, providing primary, specialty, urgent, and surgical care. Amar Desai, MD, chief executive officer of Optum Health, shared the updated workforce numbers during the health care conglomerate’s annual investor conference.

Health care mergers and consolidations have become more common as physician groups struggle to stay afloat amid dwindling payer reimbursements. Although private equity and health systems often acquire practices, payers like UHC are increasingly doing so as part of their model to advance value-based care. 

Yashaswini Singh, PhD, health care economist and assistant professor of health services, policy, and practice at Brown University, says such moves mirror the broader trend in corporate consolidation of physician practices. She said in an interview that the integrated models could possibly enhance care coordination and improve outcomes, but the impact of payer-led consolidation has not been extensively studied. 

Meanwhile, evidence considering private equity ownership is just emerging. In a 2022 study published in JAMA Health Forum, with Dr. Singh as lead author, findings showed that private equity involvement increased healthcare spending through higher prices and utilization. 

Consolidation can also raise anti-trust concerns. “If payers incentivize referral patterns of their employed physicians to favor other physicians employed by the payer, it can reduce competition by restricting consumer choice,” said Dr. Singh. 

A potential merger between Cigna and Humana that could happen by the end of the year will likely face intense scrutiny as it would create a company that rivals the size of UnitedHealth Group or CVS Health. If it goes through, the duo could streamline its insurance offerings and leverage each other’s care delivery platforms, clinics, and provider workforce. 

The Biden Administration has sought to strengthen anti-trust statutes to prevent industry monopolies and consumer harm, and the US Department of Justice and Federal Trade Commission have proposed new merger guidelines that have yet to be finalized. 

According to Dr. Singh, some of Optum’s medical practice purchases may bypass anti-trust statutes since most prospective mergers and acquisitions are reviewed only if they exceed a specific value ($101 million for 2023). Limited transparency in ownership structures further complicates matters. Plus, Dr. Singh said instances where physicians are hired instead of acquired through mergers would not be subject to current anti-trust laws. 

The ‘corporatization’ of health care is not good for patients or physicians, said Robert McNamara, MD, chief medical officer of the American Academy of Emergency Medicine Physician Group and cofounder of Take Medicine Back, a physician group advocating to remove corporate interests from health care. 

“If you ask a physician what causes them the most moral conflict, they’ll tell you it’s the insurance companies denying something they want to do for their patients,” he said. “To have the doctors now working for the insurance industry conflicts with a physician’s duty to put the patient first.” 

Dr. McNamara, chair of emergency medicine at Temple University’s Katz School of Medicine, said in an interview that more than half the states in the United States have laws or court rulings that support protecting physician autonomy from corporate interests. Still, he hopes a federal prohibition on private equity’s involvement in healthcare can soon gain traction. In November, Take Medicine Back raised a resolution at the American Medical Association’s interim House of Delegates meeting, which he said was subsequently referred to a committee. 

Emergency medicine was among the first specialties to succumb to private equity firms, but Dr. McNamara said that all types of health care providers and entities — from cardiology and urology to addiction treatment centers and nursing homes — are being swallowed up by larger organizations, including payers. 

UHC was named in a class action suit recently for allegedly shirking doctors’ orders and relying on a flawed algorithm to determine the length of skilled nursing facility stays for Medicare Advantage policyholders. 

At the investor meeting, Dr. Desai reiterated Optum’s desire to continue expanding care delivery options, especially in its pharmacy and behavioral health business lines, and focus on adopting value-based care. He credited the rapid growth to developing strong relationships with providers and standardizing technology and clinical systems.

A version of this article appeared on Medscape.com.

Children with obesity issues should undergo “comprehensive, intensive behavioral interventions,” including supervised physical activity sessions for up to a year, a federal task force said. 

The U.S. Preventive Services Task Force — a team of independent, volunteer experts in disease prevention who guide doctors’ decisions and influence insurance coverage — issued a draft recommendation statement outlining the interventions that should be taken when a child or teen has a high body mass index. 

Nearly 20% of children between 2 and 19 years old have what are considered high BMIs, according to Centers for Disease Control and Prevention data. While adults who have a BMI of 30 or higher are considered to have obesity, childhood obesity is determined if a child is at or above the 95th percentile of others their age and gender. 

Given the prevalence of the issue, the task force recommends behavioral interventions that include at least 26 hours of supervised physical activity sessions for up to a year. This differs from the task force’s previous recommendations on the topic, which emphasized the importance of screening for high BMIs rather than describing the right ways to intervene.

Some of the most effective interventions are targeted at both parents and their children, whether that be together, separately, or a combination of the two. Additionally, the task force recommends that children attend group sessions about healthy eating habits, how to read food labels, and exercise techniques. Ideally, these would be led and guided by people of various professional backgrounds like pediatricians, physical therapists, dietitians, psychologists, and social workers. Other medical organizations, namely the American Academy of Pediatrics, have recommended medication for some children with obesity; the task force, however, takes a more conservative approach. They noted that although the body of evidence shows weight loss medications and surgery are effective for many, there isn’t enough research to lean on regarding the use of these interventions in children, especially in the long term. 

“There are proven ways that clinicians can help the many children and teens who have a high BMI to manage their weight and stay healthy,” said Katrina Donahue, MD, MPH, a member of the task force and professor of family medicine at the University of North Carolina at Chapel Hill. “Intensive behavioral interventions are effective in helping children achieve a healthy weight while improving quality of life.”

The guidelines are still in the draft stage and are available for public comment until Jan. 16, 2024. 
 

A version of this article appeared on WebMD.com.

Children with obesity issues should undergo “comprehensive, intensive behavioral interventions,” including supervised physical activity sessions for up to a year, a federal task force said. 

The U.S. Preventive Services Task Force — a team of independent, volunteer experts in disease prevention who guide doctors’ decisions and influence insurance coverage — issued a draft recommendation statement outlining the interventions that should be taken when a child or teen has a high body mass index. 

Nearly 20% of children between 2 and 19 years old have what are considered high BMIs, according to Centers for Disease Control and Prevention data. While adults who have a BMI of 30 or higher are considered to have obesity, childhood obesity is determined if a child is at or above the 95th percentile of others their age and gender. 

Given the prevalence of the issue, the task force recommends behavioral interventions that include at least 26 hours of supervised physical activity sessions for up to a year. This differs from the task force’s previous recommendations on the topic, which emphasized the importance of screening for high BMIs rather than describing the right ways to intervene.

Some of the most effective interventions are targeted at both parents and their children, whether that be together, separately, or a combination of the two. Additionally, the task force recommends that children attend group sessions about healthy eating habits, how to read food labels, and exercise techniques. Ideally, these would be led and guided by people of various professional backgrounds like pediatricians, physical therapists, dietitians, psychologists, and social workers. Other medical organizations, namely the American Academy of Pediatrics, have recommended medication for some children with obesity; the task force, however, takes a more conservative approach. They noted that although the body of evidence shows weight loss medications and surgery are effective for many, there isn’t enough research to lean on regarding the use of these interventions in children, especially in the long term. 

“There are proven ways that clinicians can help the many children and teens who have a high BMI to manage their weight and stay healthy,” said Katrina Donahue, MD, MPH, a member of the task force and professor of family medicine at the University of North Carolina at Chapel Hill. “Intensive behavioral interventions are effective in helping children achieve a healthy weight while improving quality of life.”

The guidelines are still in the draft stage and are available for public comment until Jan. 16, 2024. 
 

A version of this article appeared on WebMD.com.

Children with obesity issues should undergo “comprehensive, intensive behavioral interventions,” including supervised physical activity sessions for up to a year, a federal task force said. 

The U.S. Preventive Services Task Force — a team of independent, volunteer experts in disease prevention who guide doctors’ decisions and influence insurance coverage — issued a draft recommendation statement outlining the interventions that should be taken when a child or teen has a high body mass index. 

Nearly 20% of children between 2 and 19 years old have what are considered high BMIs, according to Centers for Disease Control and Prevention data. While adults who have a BMI of 30 or higher are considered to have obesity, childhood obesity is determined if a child is at or above the 95th percentile of others their age and gender. 

Given the prevalence of the issue, the task force recommends behavioral interventions that include at least 26 hours of supervised physical activity sessions for up to a year. This differs from the task force’s previous recommendations on the topic, which emphasized the importance of screening for high BMIs rather than describing the right ways to intervene.

Some of the most effective interventions are targeted at both parents and their children, whether that be together, separately, or a combination of the two. Additionally, the task force recommends that children attend group sessions about healthy eating habits, how to read food labels, and exercise techniques. Ideally, these would be led and guided by people of various professional backgrounds like pediatricians, physical therapists, dietitians, psychologists, and social workers. Other medical organizations, namely the American Academy of Pediatrics, have recommended medication for some children with obesity; the task force, however, takes a more conservative approach. They noted that although the body of evidence shows weight loss medications and surgery are effective for many, there isn’t enough research to lean on regarding the use of these interventions in children, especially in the long term. 

“There are proven ways that clinicians can help the many children and teens who have a high BMI to manage their weight and stay healthy,” said Katrina Donahue, MD, MPH, a member of the task force and professor of family medicine at the University of North Carolina at Chapel Hill. “Intensive behavioral interventions are effective in helping children achieve a healthy weight while improving quality of life.”

The guidelines are still in the draft stage and are available for public comment until Jan. 16, 2024. 
 

A version of this article appeared on WebMD.com.

Changes in tissue thickness in the back of the eye can correlate with worsening or improvement of renal problems and could help predict who will have worsening of kidney function, a new analysis report finds. 

The research, published in the journal Nature Communications, is the first to show an association between chronic kidney disease (CKD) and the thickness of the retinal and choroidal layers in the back of the eye as measured by optical coherence tomography (OCT), a noninvasive imaging technology commonly used to evaluate eye diseases such as age-related macular degeneration (AMD), diabetic eye disease, and retinal detachments.

“These are common scans that people get at the opticians and now in many hospitals,” said Neeraj Dhaun, MD, PhD, a professor of nephrology at the University of Edinburgh, Scotland. (Opticians in the United Kingdom are the equivalent of optometrists in North America.) 
 

CKD Severity Equals Thinner Retinas

“We scanned the back of eye of healthy people as well as patients with various types and degrees of kidney disease, and we found that two layers in the back of eye, the retina and the choroid, were thinner in patients with kidney disease compared to people who are healthy, and that the extent of this thinning predicts whether kidney function would decline going forward over a period of 2 or 3 years,” Dr. Dhaun, the corresponding author of the new paper, said.

The publication is a report of four different studies. The first study measured OCT metrics in 112 patients with CKD, 92 patients with a functional kidney transplant, and 86 control volunteers. The researchers found the retina was 5% thinner in patients with CKD than in healthy controls. They also found that patients with CKD had reduced macular volume: 8.44 ± .44 mm³ vs 8.73 ± .36 mm³ (P < .001). The choroid was also found to be thinner at each of three macular locations measured in patients with CKD vs control volunteers. At baseline, CKD and transplant patients had significantly lower estimated glomerular filtration rate (eGFR) at 55 ± 27 and 55 ± 24 mL/min/1.73 m² compared with control volunteers at 97 ± 14 mL/min/1.73 m².

The second study reported on OCT measurements and kidney histologic injury in 50 patients who had a kidney biopsy within 30 days of their OCT. It found that choroidal thinning at all three macular locations was independently associated with more extensive kidney scarring. 

The third study focused on 25 patients with kidney failure who had a kidney transplant. Their eGFR improved from 8 ± 3 to 58 ± 21 mL/min/1.73 m² in the first week after the transplant. The choroid in these patients thickened about 5% at 1 week and by about 10% at 1 month posttransplant. OCT of 22 kidney donors showed thickening of the choroid a week after nephrectomy before a tendency to thinning over the next year.

The fourth study found that for patients with stable CKD, every 1 mm3 decrease in macular volume correlated to an increased odds of a decline in eGFR by more than 10% at 1 year (2.48; 95% CI, 1.26-5.08; P = .01) and by more than 20% at 2 years (3.75; 95% CI, 1.26-5.08; P = .004).
 

Exploring the Kidney-Eye Connection 

The potential explanation for the correlation between retinal and choroidal thickness and kidney function is unclear, Dr. Dhaun said. 

“We don’t know the exact mechanisms, and these are difficult to define from studies in patients, which is why we are doing more work in animal models of kidney disease to see if we can establish the pathways that lead to the changes in the eye,” he said. 

“However,” Dr. Dhaun added, “what we do know is that kidney disease affects the whole body. For example, kidney disease can lead to high blood pressure and heart disease, as well as diseases in the brain, and it is these effects of kidney disease on the body as whole that we are probably picking up in the back of the eye.” 

OCT has the potential to make the monitoring of patients with CKD and kidney transplant more convenient than it is now, Dr. Dhaun said. “These scanners are available in the community, and what would be ideal at some point in the future is to be able to do a patient’s kidney health check in the community potentially incorporating OCT scanning alongside blood-pressure monitoring and other healthcare measures,” he said.

“The findings provide an exciting example of how noninvasive retinal imaging using OCT can provide quantitative biomarkers of systemic disease,” Amir Kashani, MD, PhD, the Boone Pickens Professor of Ophthalmology and Biomedical Engineering at the Wilmer Eye Institute of Johns Hopkins University in Baltimore, told this news organization. “It is striking that their findings demonstrate some potential of reversible changes in choroidal perfusion after kidney transplantation.”

The finding that choroidal thickness changes in CKD are at least partly reversible with kidney transplantation is a revelation, Dr. Kashani said, and may point to a greater role for ophthalmologists in managing systemic disease. 

“Ophthalmologists can and should use their unique experience and understanding of the eye to help monitor and manage systemic conditions in collaboration with our medicine colleagues,” he said. “There are many systemic diseases that can impact the eye and ophthalmologist are uniquely positioned to help interpret those findings.”

Dr. Kashani noted that a particular strength of the report was the comparison of choroidal measurements in patients who had kidney transplantation and those that had a nephrectomy. “The consistent direction of changes in these two groups suggests the study findings are real and meaningful,” he said.

The study was independently supported. Dr. Dhaun and co-authors report no relevant financial relationships. Dr. Kashani disclosed a financial relationship with Carl Zeiss Meditec.

A version of this article first appeared on Medscape.com.

Changes in tissue thickness in the back of the eye can correlate with worsening or improvement of renal problems and could help predict who will have worsening of kidney function, a new analysis report finds. 

The research, published in the journal Nature Communications, is the first to show an association between chronic kidney disease (CKD) and the thickness of the retinal and choroidal layers in the back of the eye as measured by optical coherence tomography (OCT), a noninvasive imaging technology commonly used to evaluate eye diseases such as age-related macular degeneration (AMD), diabetic eye disease, and retinal detachments.

“These are common scans that people get at the opticians and now in many hospitals,” said Neeraj Dhaun, MD, PhD, a professor of nephrology at the University of Edinburgh, Scotland. (Opticians in the United Kingdom are the equivalent of optometrists in North America.) 
 

CKD Severity Equals Thinner Retinas

“We scanned the back of eye of healthy people as well as patients with various types and degrees of kidney disease, and we found that two layers in the back of eye, the retina and the choroid, were thinner in patients with kidney disease compared to people who are healthy, and that the extent of this thinning predicts whether kidney function would decline going forward over a period of 2 or 3 years,” Dr. Dhaun, the corresponding author of the new paper, said.

The publication is a report of four different studies. The first study measured OCT metrics in 112 patients with CKD, 92 patients with a functional kidney transplant, and 86 control volunteers. The researchers found the retina was 5% thinner in patients with CKD than in healthy controls. They also found that patients with CKD had reduced macular volume: 8.44 ± .44 mm³ vs 8.73 ± .36 mm³ (P < .001). The choroid was also found to be thinner at each of three macular locations measured in patients with CKD vs control volunteers. At baseline, CKD and transplant patients had significantly lower estimated glomerular filtration rate (eGFR) at 55 ± 27 and 55 ± 24 mL/min/1.73 m² compared with control volunteers at 97 ± 14 mL/min/1.73 m².

The second study reported on OCT measurements and kidney histologic injury in 50 patients who had a kidney biopsy within 30 days of their OCT. It found that choroidal thinning at all three macular locations was independently associated with more extensive kidney scarring. 

The third study focused on 25 patients with kidney failure who had a kidney transplant. Their eGFR improved from 8 ± 3 to 58 ± 21 mL/min/1.73 m² in the first week after the transplant. The choroid in these patients thickened about 5% at 1 week and by about 10% at 1 month posttransplant. OCT of 22 kidney donors showed thickening of the choroid a week after nephrectomy before a tendency to thinning over the next year.

The fourth study found that for patients with stable CKD, every 1 mm3 decrease in macular volume correlated to an increased odds of a decline in eGFR by more than 10% at 1 year (2.48; 95% CI, 1.26-5.08; P = .01) and by more than 20% at 2 years (3.75; 95% CI, 1.26-5.08; P = .004).
 

Exploring the Kidney-Eye Connection 

The potential explanation for the correlation between retinal and choroidal thickness and kidney function is unclear, Dr. Dhaun said. 

“We don’t know the exact mechanisms, and these are difficult to define from studies in patients, which is why we are doing more work in animal models of kidney disease to see if we can establish the pathways that lead to the changes in the eye,” he said. 

“However,” Dr. Dhaun added, “what we do know is that kidney disease affects the whole body. For example, kidney disease can lead to high blood pressure and heart disease, as well as diseases in the brain, and it is these effects of kidney disease on the body as whole that we are probably picking up in the back of the eye.” 

OCT has the potential to make the monitoring of patients with CKD and kidney transplant more convenient than it is now, Dr. Dhaun said. “These scanners are available in the community, and what would be ideal at some point in the future is to be able to do a patient’s kidney health check in the community potentially incorporating OCT scanning alongside blood-pressure monitoring and other healthcare measures,” he said.

“The findings provide an exciting example of how noninvasive retinal imaging using OCT can provide quantitative biomarkers of systemic disease,” Amir Kashani, MD, PhD, the Boone Pickens Professor of Ophthalmology and Biomedical Engineering at the Wilmer Eye Institute of Johns Hopkins University in Baltimore, told this news organization. “It is striking that their findings demonstrate some potential of reversible changes in choroidal perfusion after kidney transplantation.”

The finding that choroidal thickness changes in CKD are at least partly reversible with kidney transplantation is a revelation, Dr. Kashani said, and may point to a greater role for ophthalmologists in managing systemic disease. 

“Ophthalmologists can and should use their unique experience and understanding of the eye to help monitor and manage systemic conditions in collaboration with our medicine colleagues,” he said. “There are many systemic diseases that can impact the eye and ophthalmologist are uniquely positioned to help interpret those findings.”

Dr. Kashani noted that a particular strength of the report was the comparison of choroidal measurements in patients who had kidney transplantation and those that had a nephrectomy. “The consistent direction of changes in these two groups suggests the study findings are real and meaningful,” he said.

The study was independently supported. Dr. Dhaun and co-authors report no relevant financial relationships. Dr. Kashani disclosed a financial relationship with Carl Zeiss Meditec.

A version of this article first appeared on Medscape.com.

Changes in tissue thickness in the back of the eye can correlate with worsening or improvement of renal problems and could help predict who will have worsening of kidney function, a new analysis report finds. 

The research, published in the journal Nature Communications, is the first to show an association between chronic kidney disease (CKD) and the thickness of the retinal and choroidal layers in the back of the eye as measured by optical coherence tomography (OCT), a noninvasive imaging technology commonly used to evaluate eye diseases such as age-related macular degeneration (AMD), diabetic eye disease, and retinal detachments.

“These are common scans that people get at the opticians and now in many hospitals,” said Neeraj Dhaun, MD, PhD, a professor of nephrology at the University of Edinburgh, Scotland. (Opticians in the United Kingdom are the equivalent of optometrists in North America.) 
 

CKD Severity Equals Thinner Retinas

“We scanned the back of eye of healthy people as well as patients with various types and degrees of kidney disease, and we found that two layers in the back of eye, the retina and the choroid, were thinner in patients with kidney disease compared to people who are healthy, and that the extent of this thinning predicts whether kidney function would decline going forward over a period of 2 or 3 years,” Dr. Dhaun, the corresponding author of the new paper, said.

The publication is a report of four different studies. The first study measured OCT metrics in 112 patients with CKD, 92 patients with a functional kidney transplant, and 86 control volunteers. The researchers found the retina was 5% thinner in patients with CKD than in healthy controls. They also found that patients with CKD had reduced macular volume: 8.44 ± .44 mm³ vs 8.73 ± .36 mm³ (P < .001). The choroid was also found to be thinner at each of three macular locations measured in patients with CKD vs control volunteers. At baseline, CKD and transplant patients had significantly lower estimated glomerular filtration rate (eGFR) at 55 ± 27 and 55 ± 24 mL/min/1.73 m² compared with control volunteers at 97 ± 14 mL/min/1.73 m².

The second study reported on OCT measurements and kidney histologic injury in 50 patients who had a kidney biopsy within 30 days of their OCT. It found that choroidal thinning at all three macular locations was independently associated with more extensive kidney scarring. 

The third study focused on 25 patients with kidney failure who had a kidney transplant. Their eGFR improved from 8 ± 3 to 58 ± 21 mL/min/1.73 m² in the first week after the transplant. The choroid in these patients thickened about 5% at 1 week and by about 10% at 1 month posttransplant. OCT of 22 kidney donors showed thickening of the choroid a week after nephrectomy before a tendency to thinning over the next year.

The fourth study found that for patients with stable CKD, every 1 mm3 decrease in macular volume correlated to an increased odds of a decline in eGFR by more than 10% at 1 year (2.48; 95% CI, 1.26-5.08; P = .01) and by more than 20% at 2 years (3.75; 95% CI, 1.26-5.08; P = .004).
 

Exploring the Kidney-Eye Connection 

The potential explanation for the correlation between retinal and choroidal thickness and kidney function is unclear, Dr. Dhaun said. 

“We don’t know the exact mechanisms, and these are difficult to define from studies in patients, which is why we are doing more work in animal models of kidney disease to see if we can establish the pathways that lead to the changes in the eye,” he said. 

“However,” Dr. Dhaun added, “what we do know is that kidney disease affects the whole body. For example, kidney disease can lead to high blood pressure and heart disease, as well as diseases in the brain, and it is these effects of kidney disease on the body as whole that we are probably picking up in the back of the eye.” 

OCT has the potential to make the monitoring of patients with CKD and kidney transplant more convenient than it is now, Dr. Dhaun said. “These scanners are available in the community, and what would be ideal at some point in the future is to be able to do a patient’s kidney health check in the community potentially incorporating OCT scanning alongside blood-pressure monitoring and other healthcare measures,” he said.

“The findings provide an exciting example of how noninvasive retinal imaging using OCT can provide quantitative biomarkers of systemic disease,” Amir Kashani, MD, PhD, the Boone Pickens Professor of Ophthalmology and Biomedical Engineering at the Wilmer Eye Institute of Johns Hopkins University in Baltimore, told this news organization. “It is striking that their findings demonstrate some potential of reversible changes in choroidal perfusion after kidney transplantation.”

The finding that choroidal thickness changes in CKD are at least partly reversible with kidney transplantation is a revelation, Dr. Kashani said, and may point to a greater role for ophthalmologists in managing systemic disease. 

“Ophthalmologists can and should use their unique experience and understanding of the eye to help monitor and manage systemic conditions in collaboration with our medicine colleagues,” he said. “There are many systemic diseases that can impact the eye and ophthalmologist are uniquely positioned to help interpret those findings.”

Dr. Kashani noted that a particular strength of the report was the comparison of choroidal measurements in patients who had kidney transplantation and those that had a nephrectomy. “The consistent direction of changes in these two groups suggests the study findings are real and meaningful,” he said.

The study was independently supported. Dr. Dhaun and co-authors report no relevant financial relationships. Dr. Kashani disclosed a financial relationship with Carl Zeiss Meditec.

A version of this article first appeared on Medscape.com.