User login
DMARDs Restore GI Microbiota Balance in RA But Ability to Predict Response Falls Short
Patients with rheumatoid arthritis (RA) whose symptoms improved after they started taking nonbiologic disease-modifying antirheumatic drugs also demonstrated restored balance in their oral and gut flora, which could potentially serve as a marker of how they’ll respond to DMARDs, an observational study in the United Kingdom found.
Reporting in the journal Rheumatology, researchers led by Nathan Danckert, PhD, a genetic epidemiology researcher at King’s College London, and Maxim Freidin, PhD, of the Queen Mary University of London, London, England, evaluated stool and saliva samples of 144 people recently diagnosed with RA before and after they started DMARD therapy.
“We identified a partial restoration of the microbiome to a more eubiotic state in RA patients at 6 weeks and 12 weeks of DMARD treatment in participants [who] responded well to DMARD therapy,” they wrote. “This was further supported by long-term (> 1 year) treated DMARD RA participants with similar community shifts.” Microbiomes, they said, are “a promising diagnostic tool” for directing DMARD therapy.
Study Goal Not Met
The goal of the study was to determine whether the microbiome of patients before they began treatment with DMARDs could predict their response to therapy. The patients were enrolled in the IMRABIOME study. Eligible patients had inflammatory arthritis symptoms for a year or less and met the clinical criteria for RA. Most patients were taking methotrexate (134 at baseline, 77 at 12 weeks), but study participants were also taking sulfasalazine (16 at baseline, 14 at 12 weeks) or hydroxychloroquine (58 at baseline, 45 at 12 weeks) either in combination or as a stand-alone treatment.
The study found a total of 26 different stool microbes that decreased in patients who had a minimal clinically important improvement (MCII) after starting DMARD therapy. At 6 weeks, the most significant declines were in Prevotella species. At 12 weeks, the greatest declines were in Streptococcus.
The researchers also developed models that used gut and oral metagenomes to predict MCII in patients starting DMARD therapy. They used a previously published microbiome dataset as a validation cohort for the model, but they acknowledged their models “were not as strong” as three previously published models. “Our findings support the hypothesis of DMARD restoration of a eubiotic gut microbiome when patient and treatment align,” the authors wrote.
They noted they had anticipated finding baseline microbiome samples that would help predict treatment responses. While baseline evaluation didn’t differentiate between responders and nonresponders, they wrote that a longitudinal analysis demonstrated changing microbiota and a positive response to therapy, with declining levels of Prevotella and Streptococcus species most pronounced at 6 and 12 weeks, respectively.
“Microbiomes provide a promising diagnostic tool for guiding therapeutic decisions in the future,” the study authors wrote.
Commentary
In commenting on the study, Gregg J. Silverman, MD, professor of medicine and pathology at the New York University School of Medicine, New York City, said it “was carefully performed, technically it was actually quite impressive, and the scale of the study actually was quite suitable.”
However, the study fell short of achieving its primary goal of using the microbiome to predict treatment response, he said. “Basically, they could not find there was anything they could correlate with clinical response rates, although they did find that the presence or absence of certain bacteria at 6 weeks or 12 weeks into treatment correlated with a clinical response,” he said.
The multiplicity of DMARDs used by the study population was “one of the complicating factors” of the study, Dr. Silverman said. “It would’ve been a much more easily interpreted study if it used just a single agent like methotrexate,” he said. “I think that’s problematic, but I do think this contributes to getting us a little further down the road of understanding how the microbiome can influence the pathogenesis of rheumatoid arthritis response to treatment.”
One of the questions surrounding the microbiome changes is whether they occurred because of the effect of the therapy itself or because the disease activity subsides, Dr. Silverman said. “So, you’re not sure if it’s cause or effect. There’s evidence to suggest that either could be true.”
This study adds to a 2022 study that found a similar effect with methotrexate, Dr. Silverman said. “They considered a lot of variables, and they considered a lot of potential confounding effects,” he said. “So, their data were well-considered, and they will actually hold up over time and contribute to the next range of studies that will be performed, no doubt, in this area.”
It would be better if those future studies focused on just one DMARD drug and studied the recovered bacteria in animal models to gain a better understanding of how they correlate to pathogenesis, Dr. Silverman added.
The study received funding from Versus Arthritis. Dr. Danckert, Dr. Freidin, and coauthors, as well as Dr. Silverman, reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
Patients with rheumatoid arthritis (RA) whose symptoms improved after they started taking nonbiologic disease-modifying antirheumatic drugs also demonstrated restored balance in their oral and gut flora, which could potentially serve as a marker of how they’ll respond to DMARDs, an observational study in the United Kingdom found.
Reporting in the journal Rheumatology, researchers led by Nathan Danckert, PhD, a genetic epidemiology researcher at King’s College London, and Maxim Freidin, PhD, of the Queen Mary University of London, London, England, evaluated stool and saliva samples of 144 people recently diagnosed with RA before and after they started DMARD therapy.
“We identified a partial restoration of the microbiome to a more eubiotic state in RA patients at 6 weeks and 12 weeks of DMARD treatment in participants [who] responded well to DMARD therapy,” they wrote. “This was further supported by long-term (> 1 year) treated DMARD RA participants with similar community shifts.” Microbiomes, they said, are “a promising diagnostic tool” for directing DMARD therapy.
Study Goal Not Met
The goal of the study was to determine whether the microbiome of patients before they began treatment with DMARDs could predict their response to therapy. The patients were enrolled in the IMRABIOME study. Eligible patients had inflammatory arthritis symptoms for a year or less and met the clinical criteria for RA. Most patients were taking methotrexate (134 at baseline, 77 at 12 weeks), but study participants were also taking sulfasalazine (16 at baseline, 14 at 12 weeks) or hydroxychloroquine (58 at baseline, 45 at 12 weeks) either in combination or as a stand-alone treatment.
The study found a total of 26 different stool microbes that decreased in patients who had a minimal clinically important improvement (MCII) after starting DMARD therapy. At 6 weeks, the most significant declines were in Prevotella species. At 12 weeks, the greatest declines were in Streptococcus.
The researchers also developed models that used gut and oral metagenomes to predict MCII in patients starting DMARD therapy. They used a previously published microbiome dataset as a validation cohort for the model, but they acknowledged their models “were not as strong” as three previously published models. “Our findings support the hypothesis of DMARD restoration of a eubiotic gut microbiome when patient and treatment align,” the authors wrote.
They noted they had anticipated finding baseline microbiome samples that would help predict treatment responses. While baseline evaluation didn’t differentiate between responders and nonresponders, they wrote that a longitudinal analysis demonstrated changing microbiota and a positive response to therapy, with declining levels of Prevotella and Streptococcus species most pronounced at 6 and 12 weeks, respectively.
“Microbiomes provide a promising diagnostic tool for guiding therapeutic decisions in the future,” the study authors wrote.
Commentary
In commenting on the study, Gregg J. Silverman, MD, professor of medicine and pathology at the New York University School of Medicine, New York City, said it “was carefully performed, technically it was actually quite impressive, and the scale of the study actually was quite suitable.”
However, the study fell short of achieving its primary goal of using the microbiome to predict treatment response, he said. “Basically, they could not find there was anything they could correlate with clinical response rates, although they did find that the presence or absence of certain bacteria at 6 weeks or 12 weeks into treatment correlated with a clinical response,” he said.
The multiplicity of DMARDs used by the study population was “one of the complicating factors” of the study, Dr. Silverman said. “It would’ve been a much more easily interpreted study if it used just a single agent like methotrexate,” he said. “I think that’s problematic, but I do think this contributes to getting us a little further down the road of understanding how the microbiome can influence the pathogenesis of rheumatoid arthritis response to treatment.”
One of the questions surrounding the microbiome changes is whether they occurred because of the effect of the therapy itself or because the disease activity subsides, Dr. Silverman said. “So, you’re not sure if it’s cause or effect. There’s evidence to suggest that either could be true.”
This study adds to a 2022 study that found a similar effect with methotrexate, Dr. Silverman said. “They considered a lot of variables, and they considered a lot of potential confounding effects,” he said. “So, their data were well-considered, and they will actually hold up over time and contribute to the next range of studies that will be performed, no doubt, in this area.”
It would be better if those future studies focused on just one DMARD drug and studied the recovered bacteria in animal models to gain a better understanding of how they correlate to pathogenesis, Dr. Silverman added.
The study received funding from Versus Arthritis. Dr. Danckert, Dr. Freidin, and coauthors, as well as Dr. Silverman, reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
Patients with rheumatoid arthritis (RA) whose symptoms improved after they started taking nonbiologic disease-modifying antirheumatic drugs also demonstrated restored balance in their oral and gut flora, which could potentially serve as a marker of how they’ll respond to DMARDs, an observational study in the United Kingdom found.
Reporting in the journal Rheumatology, researchers led by Nathan Danckert, PhD, a genetic epidemiology researcher at King’s College London, and Maxim Freidin, PhD, of the Queen Mary University of London, London, England, evaluated stool and saliva samples of 144 people recently diagnosed with RA before and after they started DMARD therapy.
“We identified a partial restoration of the microbiome to a more eubiotic state in RA patients at 6 weeks and 12 weeks of DMARD treatment in participants [who] responded well to DMARD therapy,” they wrote. “This was further supported by long-term (> 1 year) treated DMARD RA participants with similar community shifts.” Microbiomes, they said, are “a promising diagnostic tool” for directing DMARD therapy.
Study Goal Not Met
The goal of the study was to determine whether the microbiome of patients before they began treatment with DMARDs could predict their response to therapy. The patients were enrolled in the IMRABIOME study. Eligible patients had inflammatory arthritis symptoms for a year or less and met the clinical criteria for RA. Most patients were taking methotrexate (134 at baseline, 77 at 12 weeks), but study participants were also taking sulfasalazine (16 at baseline, 14 at 12 weeks) or hydroxychloroquine (58 at baseline, 45 at 12 weeks) either in combination or as a stand-alone treatment.
The study found a total of 26 different stool microbes that decreased in patients who had a minimal clinically important improvement (MCII) after starting DMARD therapy. At 6 weeks, the most significant declines were in Prevotella species. At 12 weeks, the greatest declines were in Streptococcus.
The researchers also developed models that used gut and oral metagenomes to predict MCII in patients starting DMARD therapy. They used a previously published microbiome dataset as a validation cohort for the model, but they acknowledged their models “were not as strong” as three previously published models. “Our findings support the hypothesis of DMARD restoration of a eubiotic gut microbiome when patient and treatment align,” the authors wrote.
They noted they had anticipated finding baseline microbiome samples that would help predict treatment responses. While baseline evaluation didn’t differentiate between responders and nonresponders, they wrote that a longitudinal analysis demonstrated changing microbiota and a positive response to therapy, with declining levels of Prevotella and Streptococcus species most pronounced at 6 and 12 weeks, respectively.
“Microbiomes provide a promising diagnostic tool for guiding therapeutic decisions in the future,” the study authors wrote.
Commentary
In commenting on the study, Gregg J. Silverman, MD, professor of medicine and pathology at the New York University School of Medicine, New York City, said it “was carefully performed, technically it was actually quite impressive, and the scale of the study actually was quite suitable.”
However, the study fell short of achieving its primary goal of using the microbiome to predict treatment response, he said. “Basically, they could not find there was anything they could correlate with clinical response rates, although they did find that the presence or absence of certain bacteria at 6 weeks or 12 weeks into treatment correlated with a clinical response,” he said.
The multiplicity of DMARDs used by the study population was “one of the complicating factors” of the study, Dr. Silverman said. “It would’ve been a much more easily interpreted study if it used just a single agent like methotrexate,” he said. “I think that’s problematic, but I do think this contributes to getting us a little further down the road of understanding how the microbiome can influence the pathogenesis of rheumatoid arthritis response to treatment.”
One of the questions surrounding the microbiome changes is whether they occurred because of the effect of the therapy itself or because the disease activity subsides, Dr. Silverman said. “So, you’re not sure if it’s cause or effect. There’s evidence to suggest that either could be true.”
This study adds to a 2022 study that found a similar effect with methotrexate, Dr. Silverman said. “They considered a lot of variables, and they considered a lot of potential confounding effects,” he said. “So, their data were well-considered, and they will actually hold up over time and contribute to the next range of studies that will be performed, no doubt, in this area.”
It would be better if those future studies focused on just one DMARD drug and studied the recovered bacteria in animal models to gain a better understanding of how they correlate to pathogenesis, Dr. Silverman added.
The study received funding from Versus Arthritis. Dr. Danckert, Dr. Freidin, and coauthors, as well as Dr. Silverman, reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
FROM RHEUMATOLOGY
FDA Approves 10th Humira Biosimilar, With Interchangeability
The US Food and Drug Administration has approved the first interchangeable, high-concentration, citrate-free adalimumab biosimilar, adalimumab-ryvk (Simlandi).
This is the 10th adalimumab biosimilar approved by the regulatory agency and the first biosimilar approval in the US market for the Icelandic pharmaceutical company Alvotech in partnership with Teva Pharmaceuticals.
“An interchangeable citrate-free, high-concentration biosimilar adalimumab has the potential to change the market dynamics in a rapidly evolving environment for biosimilars in the U.S.,” said Robert Wessman, chairman and CEO of Alvotech, in a company press release on February 23.
Adalimumab-ryvk was approved in the European Union in 2021 and in Australia and Canada in 2022.
Adalimumab-ryvk is indicated for adults with rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, ulcerative colitis, Crohn’s disease, plaque psoriasis, hidradenitis suppurativa, and noninfectious intermediate and posterior uveitis and panuveitis. In pediatric patients, it is indicated for polyarticular juvenile idiopathic arthritis in children 2 years of age and older and Crohn’s disease in children 6 years of age and older.
Adalimumab-ryvk is the third Humira biosimilar overall granted interchangeability status, which allows pharmacists (depending on state law) to substitute the biosimilar for the reference product without involving the prescribing clinician. Adalimumab-adbm (Cyltezo), manufactured by Boehringer Ingelheim, and adalimumab-afzb (Abrilada), manufactured by Pfizer, were previously granted interchangeability status; however, they both are interchangeable with the low-concentration formulation of Humira, which make up only an estimated 15% of Humira prescriptions, according to a report by Goodroot.
Adalimumab-ryvk will be launched “imminently” in the United States, according to the press release, but no specific dates were provided. It is also not yet known how the biosimilar will be priced compared with Humira. Other adalimumab biosimilars have launched with discounts from 5% to 85% of Humira’s list price.
A version of this article appeared on Medscape.com.
The US Food and Drug Administration has approved the first interchangeable, high-concentration, citrate-free adalimumab biosimilar, adalimumab-ryvk (Simlandi).
This is the 10th adalimumab biosimilar approved by the regulatory agency and the first biosimilar approval in the US market for the Icelandic pharmaceutical company Alvotech in partnership with Teva Pharmaceuticals.
“An interchangeable citrate-free, high-concentration biosimilar adalimumab has the potential to change the market dynamics in a rapidly evolving environment for biosimilars in the U.S.,” said Robert Wessman, chairman and CEO of Alvotech, in a company press release on February 23.
Adalimumab-ryvk was approved in the European Union in 2021 and in Australia and Canada in 2022.
Adalimumab-ryvk is indicated for adults with rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, ulcerative colitis, Crohn’s disease, plaque psoriasis, hidradenitis suppurativa, and noninfectious intermediate and posterior uveitis and panuveitis. In pediatric patients, it is indicated for polyarticular juvenile idiopathic arthritis in children 2 years of age and older and Crohn’s disease in children 6 years of age and older.
Adalimumab-ryvk is the third Humira biosimilar overall granted interchangeability status, which allows pharmacists (depending on state law) to substitute the biosimilar for the reference product without involving the prescribing clinician. Adalimumab-adbm (Cyltezo), manufactured by Boehringer Ingelheim, and adalimumab-afzb (Abrilada), manufactured by Pfizer, were previously granted interchangeability status; however, they both are interchangeable with the low-concentration formulation of Humira, which make up only an estimated 15% of Humira prescriptions, according to a report by Goodroot.
Adalimumab-ryvk will be launched “imminently” in the United States, according to the press release, but no specific dates were provided. It is also not yet known how the biosimilar will be priced compared with Humira. Other adalimumab biosimilars have launched with discounts from 5% to 85% of Humira’s list price.
A version of this article appeared on Medscape.com.
The US Food and Drug Administration has approved the first interchangeable, high-concentration, citrate-free adalimumab biosimilar, adalimumab-ryvk (Simlandi).
This is the 10th adalimumab biosimilar approved by the regulatory agency and the first biosimilar approval in the US market for the Icelandic pharmaceutical company Alvotech in partnership with Teva Pharmaceuticals.
“An interchangeable citrate-free, high-concentration biosimilar adalimumab has the potential to change the market dynamics in a rapidly evolving environment for biosimilars in the U.S.,” said Robert Wessman, chairman and CEO of Alvotech, in a company press release on February 23.
Adalimumab-ryvk was approved in the European Union in 2021 and in Australia and Canada in 2022.
Adalimumab-ryvk is indicated for adults with rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, ulcerative colitis, Crohn’s disease, plaque psoriasis, hidradenitis suppurativa, and noninfectious intermediate and posterior uveitis and panuveitis. In pediatric patients, it is indicated for polyarticular juvenile idiopathic arthritis in children 2 years of age and older and Crohn’s disease in children 6 years of age and older.
Adalimumab-ryvk is the third Humira biosimilar overall granted interchangeability status, which allows pharmacists (depending on state law) to substitute the biosimilar for the reference product without involving the prescribing clinician. Adalimumab-adbm (Cyltezo), manufactured by Boehringer Ingelheim, and adalimumab-afzb (Abrilada), manufactured by Pfizer, were previously granted interchangeability status; however, they both are interchangeable with the low-concentration formulation of Humira, which make up only an estimated 15% of Humira prescriptions, according to a report by Goodroot.
Adalimumab-ryvk will be launched “imminently” in the United States, according to the press release, but no specific dates were provided. It is also not yet known how the biosimilar will be priced compared with Humira. Other adalimumab biosimilars have launched with discounts from 5% to 85% of Humira’s list price.
A version of this article appeared on Medscape.com.
Is Metformin a ‘Drug for All Diseases’?
In 2021 alone, clinicians wrote more than 91 million orders for the medication — up from 40 million 2004.
But is metformin just getting started? Emerging evidence suggests the drug may be effective for a much broader range of conditions beyond managing high blood glucose, including various cancers, obesity, liver disease, cardiovascular, neurodegenerative, and renal diseases. As the evidence for diverse uses accumulates, many trials have launched, with researchers looking to expand metformin’s indications and validate or explore new directions.
Metformin’s long history as a pharmaceutical includes an herbal ancestry, recognition in 1918 for its ability to lower blood glucose, being cast aside because of toxicity fears in the 1930s, rediscovery and synthesis in Europe in the 1940s, the first reported use for diabetes in 1957, and approval in the United States in 1994.
The drug has maintained its place as the preferred first-line treatment for type 2 diabetes since 2011, when it was first included in the World Health Organization’s essential medicines list.
“The focus hitherto has been primarily on its insulin sensitization effects,” Akshay Jain, MD, a clinical and research endocrinologist at TLC Diabetes and Endocrinology, in Surrey, British Columbia, Canada, told this news organization.
“The recent surge of renewed interest is in part related to its postulated effects on multiple other receptors,” he said. “In my mind, the metformin data on coronary artery disease reduction and cancer-protective effects have come farther along than other disease states.”
Cardiovascular Outcomes
Gregory G. Schwartz, MD, PhD, chief of the cardiology section at Rocky Mountain Regional VA Medical Center and professor of medicine at the University of Colorado School of Medicine in Aurora, is leading the VA-IMPACT trial. Despite metformin’s long history and widespread use, he said his study is the first placebo-controlled cardiovascular outcomes trial of the drug.
Launched in 2023, the study tests the hypothesis that metformin reduces the risk for death or nonfatal ischemic cardiovascular events in patients with prediabetes and established coronary, cerebrovascular, or peripheral artery disease, Dr. Schwartz said. The trial is being conducted at roughly 40 VA medical centers, with a planned enrollment of 7410 patients. The estimated completion date is March 2029.
“The principal mechanism of action of metformin is through activation of AMP [adenosine monophosphate]–activated protein kinase, a central pathway in metabolic regulation, cell protection, and survival,” Dr. Schwartz explained. “Experimental data have demonstrated attenuated development of atherosclerosis, reduced myocardial infarct size, improved endothelial function, and antiarrhythmic actions — none of those dependent on the presence of diabetes.”
Dr. Schwartz and his colleagues decided to test their hypothesis in people with prediabetes, rather than diabetes, to create a “true placebo-controlled comparison,” he said.
“If patients with type 2 diabetes had been chosen, there would be potential for confounding because a placebo group would require more treatment with other active antihyperglycemic medications to achieve the same degree of glycemic control as a metformin group,” Dr. Schwartz said.
“If proven efficacious in the VA-IMPACT trial, metformin could provide an inexpensive, generally safe, and well-tolerated approach to reduce cardiovascular morbidity and mortality in a large segment of the population,” Dr. Schwartz added. “Perhaps the old dog can learn some new tricks.”
Other recruiting trials looking at cardiovascular-related outcomes include Met-PEF, LIMIT, and Metformin as an Adjunctive Therapy to Catheter Ablation in Atrial Fibrillation.
Reducing Cancer Risks
Sai Yendamuri, MD, chair of the Department of Thoracic Surgery and director of the Thoracic Surgery Laboratory at Roswell Park Comprehensive Cancer Center in Buffalo, New York, is leading a phase 2 trial exploring whether metformin can prevent lung cancer in people with overweight or obesity who are at a high risk for the malignancy.
The study, which has accrued about 60% of its estimated enrollment, also will assess whether metformin can reprogram participants’ immune systems, with a view toward reducing the activity of regulatory T cells that are linked to development of tumors.
“In our preclinical and retrospective clinical data, we found that metformin had anticancer effects but only if the patients were overweight,” Dr. Yendamuri said. “In mice, we find that obesity increases regulatory T-cell function, which suppresses the immune system of the lungs. This effect is reversed by metformin.” The team is conducting the current study to examine if this happens in patients, as well. Results are expected next year.
Research is underway in other tumor types, including oral and endometrial, and brain cancers.
Preventing Alzheimer’s Disease
Cognitive function — or at least delaying its erosion — represents another front for metformin. José A. Luchsinger, MD, MPH, vice-chair for clinical and epidemiological research and director of the section on geriatrics, gerontology, and aging at Columbia University Irving Medical Center in New York City, is heading a phase 2/3 randomized controlled trial assessing the ability of the drug to prevent Alzheimer›s disease.
The study investigators hope to enroll 326 men and women aged 55-90 years with early and late mild cognitive impairment, overweight or obesity, and no diabetes.
“The hypothesis is that improving insulin and glucose levels can lead to lowering the risk of Alzheimer’s disease,” Dr. Luchsinger said. Recruitment should be complete by the end of 2024 and results are expected in late 2026.
Similar studies are underway in Europe and Asia.
Other areas of investigation, while tantalizing, are mostly in early stages, although bolstered by preclinical and mechanistic studies. The authors of a recent review on the potential mechanisms of action of metformin and existing evidence of the drug›s effectiveness — or lack thereof — in treating diseases other than diabetes, wrote: “Collectively, these data raise the question: Is metformin a drug for all diseases? It remains unclear as to whether all of these putative beneficial effects are secondary to its actions as an antihyperglycemic and insulin-sensitizing drug, or result from other cellular actions, including inhibition of mTOR (mammalian target for rapamycin), or direct antiviral actions.”
Off-Label Uses
Metformin currently is approved by the US Food and Drug Administration only for the treatment of type 2 diabetes, although it is also the only antidiabetic medication for prediabetes currently recommended by the American Diabetes Association.
Some studies currently are looking at its use in a variety of off-label indications, including obesity, gestational diabetes, weight gain from antipsychotics, and polycystic ovary syndrome.
For the most part, metformin is considered a safe drug, but it is not risk-free, Dr. Jain cautioned.
“Although it would certainly be helpful to see if this inexpensive medication that’s universally available can help in disease states, one shouldn’t overlook the potential risk of adverse effects, such as gastrointestinal, potential vitamin B12 deficiency, blunting of skeletal muscle development and the rare risk of lactic acidosis in those with kidney impairment,” he said.
“Similarly, with recent reports of the carcinogenic potential of certain formulations of long-acting metformin that contained NDMA [N-nitrosodimethylamine], it would be imperative that these kinks are removed before we incorporate metformin as the gift that keeps giving.”
Dr. Jain reported financial relationships with Abbott, Amgen, Boehringer Ingelheim, Dexcom, Eli Lilly, Janssen, Medtronic, Merck, and Novo Nordisk. Dr. Yendamuri disclosed serving on the scientific advisory board member of Karkinos Healthcare and research funding from Lumeda for the metformin study. Dr. Luchsinger reported receiving donated metformin and matching placebo from EMD Serono, a subsidiary of Merck, for the MAP study. Dr. Schwartz received research support from the US Department of Veterans Affairs as National Chair of the VA-IMPACT trial.
A version of this article appeared on Medscape.com.
In 2021 alone, clinicians wrote more than 91 million orders for the medication — up from 40 million 2004.
But is metformin just getting started? Emerging evidence suggests the drug may be effective for a much broader range of conditions beyond managing high blood glucose, including various cancers, obesity, liver disease, cardiovascular, neurodegenerative, and renal diseases. As the evidence for diverse uses accumulates, many trials have launched, with researchers looking to expand metformin’s indications and validate or explore new directions.
Metformin’s long history as a pharmaceutical includes an herbal ancestry, recognition in 1918 for its ability to lower blood glucose, being cast aside because of toxicity fears in the 1930s, rediscovery and synthesis in Europe in the 1940s, the first reported use for diabetes in 1957, and approval in the United States in 1994.
The drug has maintained its place as the preferred first-line treatment for type 2 diabetes since 2011, when it was first included in the World Health Organization’s essential medicines list.
“The focus hitherto has been primarily on its insulin sensitization effects,” Akshay Jain, MD, a clinical and research endocrinologist at TLC Diabetes and Endocrinology, in Surrey, British Columbia, Canada, told this news organization.
“The recent surge of renewed interest is in part related to its postulated effects on multiple other receptors,” he said. “In my mind, the metformin data on coronary artery disease reduction and cancer-protective effects have come farther along than other disease states.”
Cardiovascular Outcomes
Gregory G. Schwartz, MD, PhD, chief of the cardiology section at Rocky Mountain Regional VA Medical Center and professor of medicine at the University of Colorado School of Medicine in Aurora, is leading the VA-IMPACT trial. Despite metformin’s long history and widespread use, he said his study is the first placebo-controlled cardiovascular outcomes trial of the drug.
Launched in 2023, the study tests the hypothesis that metformin reduces the risk for death or nonfatal ischemic cardiovascular events in patients with prediabetes and established coronary, cerebrovascular, or peripheral artery disease, Dr. Schwartz said. The trial is being conducted at roughly 40 VA medical centers, with a planned enrollment of 7410 patients. The estimated completion date is March 2029.
“The principal mechanism of action of metformin is through activation of AMP [adenosine monophosphate]–activated protein kinase, a central pathway in metabolic regulation, cell protection, and survival,” Dr. Schwartz explained. “Experimental data have demonstrated attenuated development of atherosclerosis, reduced myocardial infarct size, improved endothelial function, and antiarrhythmic actions — none of those dependent on the presence of diabetes.”
Dr. Schwartz and his colleagues decided to test their hypothesis in people with prediabetes, rather than diabetes, to create a “true placebo-controlled comparison,” he said.
“If patients with type 2 diabetes had been chosen, there would be potential for confounding because a placebo group would require more treatment with other active antihyperglycemic medications to achieve the same degree of glycemic control as a metformin group,” Dr. Schwartz said.
“If proven efficacious in the VA-IMPACT trial, metformin could provide an inexpensive, generally safe, and well-tolerated approach to reduce cardiovascular morbidity and mortality in a large segment of the population,” Dr. Schwartz added. “Perhaps the old dog can learn some new tricks.”
Other recruiting trials looking at cardiovascular-related outcomes include Met-PEF, LIMIT, and Metformin as an Adjunctive Therapy to Catheter Ablation in Atrial Fibrillation.
Reducing Cancer Risks
Sai Yendamuri, MD, chair of the Department of Thoracic Surgery and director of the Thoracic Surgery Laboratory at Roswell Park Comprehensive Cancer Center in Buffalo, New York, is leading a phase 2 trial exploring whether metformin can prevent lung cancer in people with overweight or obesity who are at a high risk for the malignancy.
The study, which has accrued about 60% of its estimated enrollment, also will assess whether metformin can reprogram participants’ immune systems, with a view toward reducing the activity of regulatory T cells that are linked to development of tumors.
“In our preclinical and retrospective clinical data, we found that metformin had anticancer effects but only if the patients were overweight,” Dr. Yendamuri said. “In mice, we find that obesity increases regulatory T-cell function, which suppresses the immune system of the lungs. This effect is reversed by metformin.” The team is conducting the current study to examine if this happens in patients, as well. Results are expected next year.
Research is underway in other tumor types, including oral and endometrial, and brain cancers.
Preventing Alzheimer’s Disease
Cognitive function — or at least delaying its erosion — represents another front for metformin. José A. Luchsinger, MD, MPH, vice-chair for clinical and epidemiological research and director of the section on geriatrics, gerontology, and aging at Columbia University Irving Medical Center in New York City, is heading a phase 2/3 randomized controlled trial assessing the ability of the drug to prevent Alzheimer›s disease.
The study investigators hope to enroll 326 men and women aged 55-90 years with early and late mild cognitive impairment, overweight or obesity, and no diabetes.
“The hypothesis is that improving insulin and glucose levels can lead to lowering the risk of Alzheimer’s disease,” Dr. Luchsinger said. Recruitment should be complete by the end of 2024 and results are expected in late 2026.
Similar studies are underway in Europe and Asia.
Other areas of investigation, while tantalizing, are mostly in early stages, although bolstered by preclinical and mechanistic studies. The authors of a recent review on the potential mechanisms of action of metformin and existing evidence of the drug›s effectiveness — or lack thereof — in treating diseases other than diabetes, wrote: “Collectively, these data raise the question: Is metformin a drug for all diseases? It remains unclear as to whether all of these putative beneficial effects are secondary to its actions as an antihyperglycemic and insulin-sensitizing drug, or result from other cellular actions, including inhibition of mTOR (mammalian target for rapamycin), or direct antiviral actions.”
Off-Label Uses
Metformin currently is approved by the US Food and Drug Administration only for the treatment of type 2 diabetes, although it is also the only antidiabetic medication for prediabetes currently recommended by the American Diabetes Association.
Some studies currently are looking at its use in a variety of off-label indications, including obesity, gestational diabetes, weight gain from antipsychotics, and polycystic ovary syndrome.
For the most part, metformin is considered a safe drug, but it is not risk-free, Dr. Jain cautioned.
“Although it would certainly be helpful to see if this inexpensive medication that’s universally available can help in disease states, one shouldn’t overlook the potential risk of adverse effects, such as gastrointestinal, potential vitamin B12 deficiency, blunting of skeletal muscle development and the rare risk of lactic acidosis in those with kidney impairment,” he said.
“Similarly, with recent reports of the carcinogenic potential of certain formulations of long-acting metformin that contained NDMA [N-nitrosodimethylamine], it would be imperative that these kinks are removed before we incorporate metformin as the gift that keeps giving.”
Dr. Jain reported financial relationships with Abbott, Amgen, Boehringer Ingelheim, Dexcom, Eli Lilly, Janssen, Medtronic, Merck, and Novo Nordisk. Dr. Yendamuri disclosed serving on the scientific advisory board member of Karkinos Healthcare and research funding from Lumeda for the metformin study. Dr. Luchsinger reported receiving donated metformin and matching placebo from EMD Serono, a subsidiary of Merck, for the MAP study. Dr. Schwartz received research support from the US Department of Veterans Affairs as National Chair of the VA-IMPACT trial.
A version of this article appeared on Medscape.com.
In 2021 alone, clinicians wrote more than 91 million orders for the medication — up from 40 million 2004.
But is metformin just getting started? Emerging evidence suggests the drug may be effective for a much broader range of conditions beyond managing high blood glucose, including various cancers, obesity, liver disease, cardiovascular, neurodegenerative, and renal diseases. As the evidence for diverse uses accumulates, many trials have launched, with researchers looking to expand metformin’s indications and validate or explore new directions.
Metformin’s long history as a pharmaceutical includes an herbal ancestry, recognition in 1918 for its ability to lower blood glucose, being cast aside because of toxicity fears in the 1930s, rediscovery and synthesis in Europe in the 1940s, the first reported use for diabetes in 1957, and approval in the United States in 1994.
The drug has maintained its place as the preferred first-line treatment for type 2 diabetes since 2011, when it was first included in the World Health Organization’s essential medicines list.
“The focus hitherto has been primarily on its insulin sensitization effects,” Akshay Jain, MD, a clinical and research endocrinologist at TLC Diabetes and Endocrinology, in Surrey, British Columbia, Canada, told this news organization.
“The recent surge of renewed interest is in part related to its postulated effects on multiple other receptors,” he said. “In my mind, the metformin data on coronary artery disease reduction and cancer-protective effects have come farther along than other disease states.”
Cardiovascular Outcomes
Gregory G. Schwartz, MD, PhD, chief of the cardiology section at Rocky Mountain Regional VA Medical Center and professor of medicine at the University of Colorado School of Medicine in Aurora, is leading the VA-IMPACT trial. Despite metformin’s long history and widespread use, he said his study is the first placebo-controlled cardiovascular outcomes trial of the drug.
Launched in 2023, the study tests the hypothesis that metformin reduces the risk for death or nonfatal ischemic cardiovascular events in patients with prediabetes and established coronary, cerebrovascular, or peripheral artery disease, Dr. Schwartz said. The trial is being conducted at roughly 40 VA medical centers, with a planned enrollment of 7410 patients. The estimated completion date is March 2029.
“The principal mechanism of action of metformin is through activation of AMP [adenosine monophosphate]–activated protein kinase, a central pathway in metabolic regulation, cell protection, and survival,” Dr. Schwartz explained. “Experimental data have demonstrated attenuated development of atherosclerosis, reduced myocardial infarct size, improved endothelial function, and antiarrhythmic actions — none of those dependent on the presence of diabetes.”
Dr. Schwartz and his colleagues decided to test their hypothesis in people with prediabetes, rather than diabetes, to create a “true placebo-controlled comparison,” he said.
“If patients with type 2 diabetes had been chosen, there would be potential for confounding because a placebo group would require more treatment with other active antihyperglycemic medications to achieve the same degree of glycemic control as a metformin group,” Dr. Schwartz said.
“If proven efficacious in the VA-IMPACT trial, metformin could provide an inexpensive, generally safe, and well-tolerated approach to reduce cardiovascular morbidity and mortality in a large segment of the population,” Dr. Schwartz added. “Perhaps the old dog can learn some new tricks.”
Other recruiting trials looking at cardiovascular-related outcomes include Met-PEF, LIMIT, and Metformin as an Adjunctive Therapy to Catheter Ablation in Atrial Fibrillation.
Reducing Cancer Risks
Sai Yendamuri, MD, chair of the Department of Thoracic Surgery and director of the Thoracic Surgery Laboratory at Roswell Park Comprehensive Cancer Center in Buffalo, New York, is leading a phase 2 trial exploring whether metformin can prevent lung cancer in people with overweight or obesity who are at a high risk for the malignancy.
The study, which has accrued about 60% of its estimated enrollment, also will assess whether metformin can reprogram participants’ immune systems, with a view toward reducing the activity of regulatory T cells that are linked to development of tumors.
“In our preclinical and retrospective clinical data, we found that metformin had anticancer effects but only if the patients were overweight,” Dr. Yendamuri said. “In mice, we find that obesity increases regulatory T-cell function, which suppresses the immune system of the lungs. This effect is reversed by metformin.” The team is conducting the current study to examine if this happens in patients, as well. Results are expected next year.
Research is underway in other tumor types, including oral and endometrial, and brain cancers.
Preventing Alzheimer’s Disease
Cognitive function — or at least delaying its erosion — represents another front for metformin. José A. Luchsinger, MD, MPH, vice-chair for clinical and epidemiological research and director of the section on geriatrics, gerontology, and aging at Columbia University Irving Medical Center in New York City, is heading a phase 2/3 randomized controlled trial assessing the ability of the drug to prevent Alzheimer›s disease.
The study investigators hope to enroll 326 men and women aged 55-90 years with early and late mild cognitive impairment, overweight or obesity, and no diabetes.
“The hypothesis is that improving insulin and glucose levels can lead to lowering the risk of Alzheimer’s disease,” Dr. Luchsinger said. Recruitment should be complete by the end of 2024 and results are expected in late 2026.
Similar studies are underway in Europe and Asia.
Other areas of investigation, while tantalizing, are mostly in early stages, although bolstered by preclinical and mechanistic studies. The authors of a recent review on the potential mechanisms of action of metformin and existing evidence of the drug›s effectiveness — or lack thereof — in treating diseases other than diabetes, wrote: “Collectively, these data raise the question: Is metformin a drug for all diseases? It remains unclear as to whether all of these putative beneficial effects are secondary to its actions as an antihyperglycemic and insulin-sensitizing drug, or result from other cellular actions, including inhibition of mTOR (mammalian target for rapamycin), or direct antiviral actions.”
Off-Label Uses
Metformin currently is approved by the US Food and Drug Administration only for the treatment of type 2 diabetes, although it is also the only antidiabetic medication for prediabetes currently recommended by the American Diabetes Association.
Some studies currently are looking at its use in a variety of off-label indications, including obesity, gestational diabetes, weight gain from antipsychotics, and polycystic ovary syndrome.
For the most part, metformin is considered a safe drug, but it is not risk-free, Dr. Jain cautioned.
“Although it would certainly be helpful to see if this inexpensive medication that’s universally available can help in disease states, one shouldn’t overlook the potential risk of adverse effects, such as gastrointestinal, potential vitamin B12 deficiency, blunting of skeletal muscle development and the rare risk of lactic acidosis in those with kidney impairment,” he said.
“Similarly, with recent reports of the carcinogenic potential of certain formulations of long-acting metformin that contained NDMA [N-nitrosodimethylamine], it would be imperative that these kinks are removed before we incorporate metformin as the gift that keeps giving.”
Dr. Jain reported financial relationships with Abbott, Amgen, Boehringer Ingelheim, Dexcom, Eli Lilly, Janssen, Medtronic, Merck, and Novo Nordisk. Dr. Yendamuri disclosed serving on the scientific advisory board member of Karkinos Healthcare and research funding from Lumeda for the metformin study. Dr. Luchsinger reported receiving donated metformin and matching placebo from EMD Serono, a subsidiary of Merck, for the MAP study. Dr. Schwartz received research support from the US Department of Veterans Affairs as National Chair of the VA-IMPACT trial.
A version of this article appeared on Medscape.com.
Ixekizumab’s Final Safety Results Reported Across 25 Trials in Psoriasis, PsA, Axial SpA
TOPLINE:
Pooled data from 9225 adults with psoriasis (PsO), psoriatic arthritis (PsA), and axial spondyloarthritis (axSpA) showed no new safety signals with extended exposure to ixekizumab (Taltz).
METHODOLOGY:
- Researchers combined patient data from 25 randomized, controlled trials of the safety and effectiveness of at least one dose of ixekizumab in adults with PsO (n = 6892), PsA (n = 1401), and axSpA (n = 932).
- The study population included patients with a mean age of approximately 43-49 years; at least 49% were male and at least 74% were White across the three conditions.
- Patients’ median duration of ixekizumab exposure was 1.3 years for PsO, 1.4 years for PsA, and 2.7 years for axSpA, with data up to 6 years for PsO and up to 3 years for PsA and axSpA.
- The primary outcomes were exposure-adjusted incidence rates per 100 patient-years overall and at successive year intervals for treatment-emergent adverse events, serious adverse events, and selected adverse events of interest.
TAKEAWAY:
- The incidence rate per 100 person-years for any treatment-emergent adverse event was 32.5 for PsO, 50.3 for PsA, and 38.0 for axSpA; these did not increase with lengthier exposure.
- The incidence rates for serious adverse events for patients with PsO, PsA, or axSpA were 5.4, 6.0, and 4.8 per 100 person-years, respectively.
- A total of 45 deaths were reported across the studies, including 36 in patients with PsO, six with PsA, and three with axSpA.
- Infections were the most common treatment-emergent adverse events across all patient groups, reported in patients at rates of 62.5% with PsO, 52.4% with PsA, and 57.9% with axSpA; incidence of infections did not increase over time.
IN PRACTICE:
“These final, end-of-study program results surrounding the long-term use of [ixekizumab] in patients with PsO, PsA, and axSpA should serve as an important point of reference for physicians considering [ixekizumab],” the researchers wrote.
SOURCE:
The lead author on the study was Atul Deodhar, MD, of Oregon Health & Science University, Portland. The study was published online on February 12 in Arthritis Research & Therapy.
LIMITATIONS:
Study limitations included the small sample sizes and short treatment durations in some studies, the primarily White study population, the inability to stratify risk, the lack of a long-term comparator, and potential survivor bias.
DISCLOSURES:
The studies in the review were supported by Eli Lilly. Lead author Dr. Deodhar disclosed an honorarium and serving on advisory boards at AbbVie, Bristol-Myers Squibb, Eli Lilly, Janssen, Novartis, Pfizer, and UCB, as well as research grants from AbbVie, Bristol-Myers Squibb, Celgene, Eli Lilly, Janssen, MoonLake, Novartis, Pfizer, and UCB.
A version of this article appeared on Medscape.com.
TOPLINE:
Pooled data from 9225 adults with psoriasis (PsO), psoriatic arthritis (PsA), and axial spondyloarthritis (axSpA) showed no new safety signals with extended exposure to ixekizumab (Taltz).
METHODOLOGY:
- Researchers combined patient data from 25 randomized, controlled trials of the safety and effectiveness of at least one dose of ixekizumab in adults with PsO (n = 6892), PsA (n = 1401), and axSpA (n = 932).
- The study population included patients with a mean age of approximately 43-49 years; at least 49% were male and at least 74% were White across the three conditions.
- Patients’ median duration of ixekizumab exposure was 1.3 years for PsO, 1.4 years for PsA, and 2.7 years for axSpA, with data up to 6 years for PsO and up to 3 years for PsA and axSpA.
- The primary outcomes were exposure-adjusted incidence rates per 100 patient-years overall and at successive year intervals for treatment-emergent adverse events, serious adverse events, and selected adverse events of interest.
TAKEAWAY:
- The incidence rate per 100 person-years for any treatment-emergent adverse event was 32.5 for PsO, 50.3 for PsA, and 38.0 for axSpA; these did not increase with lengthier exposure.
- The incidence rates for serious adverse events for patients with PsO, PsA, or axSpA were 5.4, 6.0, and 4.8 per 100 person-years, respectively.
- A total of 45 deaths were reported across the studies, including 36 in patients with PsO, six with PsA, and three with axSpA.
- Infections were the most common treatment-emergent adverse events across all patient groups, reported in patients at rates of 62.5% with PsO, 52.4% with PsA, and 57.9% with axSpA; incidence of infections did not increase over time.
IN PRACTICE:
“These final, end-of-study program results surrounding the long-term use of [ixekizumab] in patients with PsO, PsA, and axSpA should serve as an important point of reference for physicians considering [ixekizumab],” the researchers wrote.
SOURCE:
The lead author on the study was Atul Deodhar, MD, of Oregon Health & Science University, Portland. The study was published online on February 12 in Arthritis Research & Therapy.
LIMITATIONS:
Study limitations included the small sample sizes and short treatment durations in some studies, the primarily White study population, the inability to stratify risk, the lack of a long-term comparator, and potential survivor bias.
DISCLOSURES:
The studies in the review were supported by Eli Lilly. Lead author Dr. Deodhar disclosed an honorarium and serving on advisory boards at AbbVie, Bristol-Myers Squibb, Eli Lilly, Janssen, Novartis, Pfizer, and UCB, as well as research grants from AbbVie, Bristol-Myers Squibb, Celgene, Eli Lilly, Janssen, MoonLake, Novartis, Pfizer, and UCB.
A version of this article appeared on Medscape.com.
TOPLINE:
Pooled data from 9225 adults with psoriasis (PsO), psoriatic arthritis (PsA), and axial spondyloarthritis (axSpA) showed no new safety signals with extended exposure to ixekizumab (Taltz).
METHODOLOGY:
- Researchers combined patient data from 25 randomized, controlled trials of the safety and effectiveness of at least one dose of ixekizumab in adults with PsO (n = 6892), PsA (n = 1401), and axSpA (n = 932).
- The study population included patients with a mean age of approximately 43-49 years; at least 49% were male and at least 74% were White across the three conditions.
- Patients’ median duration of ixekizumab exposure was 1.3 years for PsO, 1.4 years for PsA, and 2.7 years for axSpA, with data up to 6 years for PsO and up to 3 years for PsA and axSpA.
- The primary outcomes were exposure-adjusted incidence rates per 100 patient-years overall and at successive year intervals for treatment-emergent adverse events, serious adverse events, and selected adverse events of interest.
TAKEAWAY:
- The incidence rate per 100 person-years for any treatment-emergent adverse event was 32.5 for PsO, 50.3 for PsA, and 38.0 for axSpA; these did not increase with lengthier exposure.
- The incidence rates for serious adverse events for patients with PsO, PsA, or axSpA were 5.4, 6.0, and 4.8 per 100 person-years, respectively.
- A total of 45 deaths were reported across the studies, including 36 in patients with PsO, six with PsA, and three with axSpA.
- Infections were the most common treatment-emergent adverse events across all patient groups, reported in patients at rates of 62.5% with PsO, 52.4% with PsA, and 57.9% with axSpA; incidence of infections did not increase over time.
IN PRACTICE:
“These final, end-of-study program results surrounding the long-term use of [ixekizumab] in patients with PsO, PsA, and axSpA should serve as an important point of reference for physicians considering [ixekizumab],” the researchers wrote.
SOURCE:
The lead author on the study was Atul Deodhar, MD, of Oregon Health & Science University, Portland. The study was published online on February 12 in Arthritis Research & Therapy.
LIMITATIONS:
Study limitations included the small sample sizes and short treatment durations in some studies, the primarily White study population, the inability to stratify risk, the lack of a long-term comparator, and potential survivor bias.
DISCLOSURES:
The studies in the review were supported by Eli Lilly. Lead author Dr. Deodhar disclosed an honorarium and serving on advisory boards at AbbVie, Bristol-Myers Squibb, Eli Lilly, Janssen, Novartis, Pfizer, and UCB, as well as research grants from AbbVie, Bristol-Myers Squibb, Celgene, Eli Lilly, Janssen, MoonLake, Novartis, Pfizer, and UCB.
A version of this article appeared on Medscape.com.
Different cultures, same wiring
Some things are universal, or at least worldwide.
She didn’t speak a word of English, but I don’t speak any Mandarin. Fortunately, her concerned son was fluent in both.
A nice lady in her 60s, here from China to visit her son and his family for a month. The visit was going fine until she abruptly developed double vision. Through the modern miracle of email she contacted her doctor in Beijing, who told her to find a neurologist here or go to an ER.
I’d had a last minute cancellation a few minutes before her son called and so was able to see her that afternoon. Both were scared that I was going to admit her to a hospital.
Fortunately, people are wired the same no matter where they’re from. The electrical fibers of the nervous system are predictable across international borders, as are the maladies.
A history and exam made the diagnosis of a diabetic cranial nerve palsy most likely, and I was able to reassure them. I ordered the usual imaging studies (fortunately she’d bought travelers’ insurance in advance). As anticipated, they were normal.
Her son and I spoke by phone to close things out, with her in the background and him translating between us. By the time she left 2 weeks later the symptoms were resolving. I made sure she went home with copies of my notes and the MRI reports, figuring someone there would be able to translate them for her physician.
These sorts of encounters are uncommon in my little solo practice, but still drive home the point that people around the world have more in common than not.
Not to mention families. The mother traveling around the world to see her son and grandchildren. The child concerned for the welfare of his parent and helping her get care. These, too, are human universals, regardless of the language spoken. There isn’t a culture on Earth that doesn’t value family connections, nor is there one that didn’t develop (albeit in different forms) doctors.
The human population is 8 billion. Everyone is different, and yet everyone, overall, is the same. Fellow travelers on a small planet.
Dr. Block has a solo neurology practice in Scottsdale, Ariz.
Some things are universal, or at least worldwide.
She didn’t speak a word of English, but I don’t speak any Mandarin. Fortunately, her concerned son was fluent in both.
A nice lady in her 60s, here from China to visit her son and his family for a month. The visit was going fine until she abruptly developed double vision. Through the modern miracle of email she contacted her doctor in Beijing, who told her to find a neurologist here or go to an ER.
I’d had a last minute cancellation a few minutes before her son called and so was able to see her that afternoon. Both were scared that I was going to admit her to a hospital.
Fortunately, people are wired the same no matter where they’re from. The electrical fibers of the nervous system are predictable across international borders, as are the maladies.
A history and exam made the diagnosis of a diabetic cranial nerve palsy most likely, and I was able to reassure them. I ordered the usual imaging studies (fortunately she’d bought travelers’ insurance in advance). As anticipated, they were normal.
Her son and I spoke by phone to close things out, with her in the background and him translating between us. By the time she left 2 weeks later the symptoms were resolving. I made sure she went home with copies of my notes and the MRI reports, figuring someone there would be able to translate them for her physician.
These sorts of encounters are uncommon in my little solo practice, but still drive home the point that people around the world have more in common than not.
Not to mention families. The mother traveling around the world to see her son and grandchildren. The child concerned for the welfare of his parent and helping her get care. These, too, are human universals, regardless of the language spoken. There isn’t a culture on Earth that doesn’t value family connections, nor is there one that didn’t develop (albeit in different forms) doctors.
The human population is 8 billion. Everyone is different, and yet everyone, overall, is the same. Fellow travelers on a small planet.
Dr. Block has a solo neurology practice in Scottsdale, Ariz.
Some things are universal, or at least worldwide.
She didn’t speak a word of English, but I don’t speak any Mandarin. Fortunately, her concerned son was fluent in both.
A nice lady in her 60s, here from China to visit her son and his family for a month. The visit was going fine until she abruptly developed double vision. Through the modern miracle of email she contacted her doctor in Beijing, who told her to find a neurologist here or go to an ER.
I’d had a last minute cancellation a few minutes before her son called and so was able to see her that afternoon. Both were scared that I was going to admit her to a hospital.
Fortunately, people are wired the same no matter where they’re from. The electrical fibers of the nervous system are predictable across international borders, as are the maladies.
A history and exam made the diagnosis of a diabetic cranial nerve palsy most likely, and I was able to reassure them. I ordered the usual imaging studies (fortunately she’d bought travelers’ insurance in advance). As anticipated, they were normal.
Her son and I spoke by phone to close things out, with her in the background and him translating between us. By the time she left 2 weeks later the symptoms were resolving. I made sure she went home with copies of my notes and the MRI reports, figuring someone there would be able to translate them for her physician.
These sorts of encounters are uncommon in my little solo practice, but still drive home the point that people around the world have more in common than not.
Not to mention families. The mother traveling around the world to see her son and grandchildren. The child concerned for the welfare of his parent and helping her get care. These, too, are human universals, regardless of the language spoken. There isn’t a culture on Earth that doesn’t value family connections, nor is there one that didn’t develop (albeit in different forms) doctors.
The human population is 8 billion. Everyone is different, and yet everyone, overall, is the same. Fellow travelers on a small planet.
Dr. Block has a solo neurology practice in Scottsdale, Ariz.
Reduced-Dose Vaccines Protect Patients With HIV Against Mpox
The smallpox vaccine effectively induces immunity against mpox virus infection (formerly simian smallpox) in patients with human immunodeficiency virus (HIV) infection, although patients with lymphocyte counts below 500 cells/mm3 require booster doses, according to data from a study published in the Journal of Medical Virology.
The data come from the prospective observational study conducted by researchers at the Infection Biology Laboratory of the Department of Medicine and Life Sciences at Pompeu Fabra University and the HIV Unit of the Hospital del Mar Medical Research Institute in Barcelona, Spain. The investigators analyzed T-cell responses induced by vaccination with JYNNEOS.
Despite the substantial decrease in the reporting frequency of mpox cases from the global peak in August 2022 (30,894 cases) to 804 monthly cases in the last six months of 2023, mpox continues to circulate, and there is no specific vaccine. The JYNNEOS vaccine, with protective cross-reactivity against orthopoxviruses, is approved by the US Food and Drug Administration and the European Medicines Agency for the prevention of smallpox and mpox in adults at high risk for infection.
During the 2022 outbreak in the United States and Europe, vaccine shortages led to the emergency use authorization of a lower intradermal dose. This strategy was aimed at increasing vaccine supply up to fivefold.
Further clinical trials are needed to evaluate responses to JYNNEOS vaccination and compare different administration routes in patients with HIV infection. Protecting this population against mpox is a priority because people with high viral loads or loCD4+ T-lymphocyte counts are especially susceptible to severe disease.
Vaccination Responses
The study assessed the immune response to the JYNNEOS vaccine in patients with HIV who were receiving antiretroviral therapy as outpatients at the Infectious Diseases Unit of Hospital del Mar in Barcelona, Spain. Participants had viral loads controlled by antiretroviral therapy and CD4+ T-lymphocyte counts ≤ 500/mm3 (loCD4 group) or ≥ 500/mm3 (hiCD4 group) in blood. Vaccine responses were compared with those of vaccinated controls without the disease. The study included cases that received the standard subcutaneous vaccine (before August 2022) or the emergency dose-saving intradermal vaccine after its approval in August 2022.
The results demonstrated that the intradermal dose-saving vaccination route is preferable to the subcutaneous route and that patients in the loCD4 group may require at least one booster to generate an efficient response of specific T cells for mpox, wrote the authors.
“This study has two relevant points,” study author Robert Güerri-Fernandez, MD, PhD, head of infectious diseases at the Hospital del Mar Medical Research Institute, told this news organization. “In the subgroup of patients with HIV with effective treatment but without an immune response (ie, loCD4), the vaccine response is worse than in people who have recovered immunity or do not have HIV. Therefore, they need a booster dose.
“The second point is that the intradermal route with one-fifth of the standard subcutaneous dose has a better immune response than the standard subcutaneous route.” He added that it was a good strategy to save doses and be able to vaccinate many more people when vaccine shortages occurred.
“A general conclusion cannot be drawn,” he said. “It needs to be validated with many more subjects, of course, but in some way, it reinforced our confidence in the strategy of health authorities to promote intradermal vaccination. There we had evidence that the patients we were vaccinating intradermally were responding well.”
In Spain, although there is no shortage of vaccines today, they continue to be administered intradermally with a fractionated dose equivalent to one fifth of a standard dose, said Dr. Güerri-Fernandez.
However, in his opinion, observations regarding the two administration routes signal a need for further research. The main message should be that for patients with HIV infection who do not have an immune response, the vaccine response is incomplete, and they need booster doses as well as monitoring of the vaccine immune response, said Dr. Güerri-Fernandez.
More Studies Required
The research, which prospectively collected data and blood samples from patients with HIV who received the JYNNEOS vaccine, is small and included only 24 patients with HIV infection, with seven hospital workers who also received the vaccine and seven unvaccinated individuals as controls. “I am one of the control subjects of the study, and intradermal vaccination is not especially pleasant,” said Dr. Güerri-Fernandez. “It is a very innervated area, and the moment of introducing the liquid is uncomfortable. But it is perfectly bearable.”
Outpatient HIV-infected patients from the Infectious Diseases Unit of Hospital del Mar on antiretroviral therapy and with undetectable viral loads were grouped according to their CD4+ T-lymphocyte counts. Those with CD4+ T-lymphocyte counts ≤ 500/mm3 required at least one booster vaccine to exhibit efficient virus-specific T-lymphocyte responses. The magnitude of the T-cell response after this booster correlated directly with the CD4+ T-lymphocyte count of those vaccinated.
For Argentine infectious disease specialist Julián García, MD, clinical researcher at the Huésped Foundation in Buenos Aires, Argentina, who did not participate in the study, it is always productive to know that T-cell responses develop in patients with HIV infection, with CD4+ T-lymphocyte counts > and < 500/mm3, through an intradermal administration route.
Dr. García emphasized that the most novel aspect is that the JYNNEOS vaccine induces a specific T-cell response in patients with HIV infection that increases with higher CD4+ T-lymphocyte levels. However, he noted that the number of patients was less than 10 in most study groups, and the control group had only intradermal administration, which limits the interpretation of the results. “It will be necessary to verify this in studies with larger groups with control groups from all routes and with a correlate of protection.”
Dr. García referred to this latter point as a significant source of uncertainty. “The study is fundamentally based on the cellular response, but nowadays, there is no immune correlate of real-life protection.” He concluded that the study builds knowledge, which is essential for a vaccine that began to be used for mpox and the effectiveness of which is based on estimates.
Dr. Güerri-Fernandez and Dr. Garcia declared no relevant financial conflicts of interest.
This story was translated from the Medscape Spanish edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.
The smallpox vaccine effectively induces immunity against mpox virus infection (formerly simian smallpox) in patients with human immunodeficiency virus (HIV) infection, although patients with lymphocyte counts below 500 cells/mm3 require booster doses, according to data from a study published in the Journal of Medical Virology.
The data come from the prospective observational study conducted by researchers at the Infection Biology Laboratory of the Department of Medicine and Life Sciences at Pompeu Fabra University and the HIV Unit of the Hospital del Mar Medical Research Institute in Barcelona, Spain. The investigators analyzed T-cell responses induced by vaccination with JYNNEOS.
Despite the substantial decrease in the reporting frequency of mpox cases from the global peak in August 2022 (30,894 cases) to 804 monthly cases in the last six months of 2023, mpox continues to circulate, and there is no specific vaccine. The JYNNEOS vaccine, with protective cross-reactivity against orthopoxviruses, is approved by the US Food and Drug Administration and the European Medicines Agency for the prevention of smallpox and mpox in adults at high risk for infection.
During the 2022 outbreak in the United States and Europe, vaccine shortages led to the emergency use authorization of a lower intradermal dose. This strategy was aimed at increasing vaccine supply up to fivefold.
Further clinical trials are needed to evaluate responses to JYNNEOS vaccination and compare different administration routes in patients with HIV infection. Protecting this population against mpox is a priority because people with high viral loads or loCD4+ T-lymphocyte counts are especially susceptible to severe disease.
Vaccination Responses
The study assessed the immune response to the JYNNEOS vaccine in patients with HIV who were receiving antiretroviral therapy as outpatients at the Infectious Diseases Unit of Hospital del Mar in Barcelona, Spain. Participants had viral loads controlled by antiretroviral therapy and CD4+ T-lymphocyte counts ≤ 500/mm3 (loCD4 group) or ≥ 500/mm3 (hiCD4 group) in blood. Vaccine responses were compared with those of vaccinated controls without the disease. The study included cases that received the standard subcutaneous vaccine (before August 2022) or the emergency dose-saving intradermal vaccine after its approval in August 2022.
The results demonstrated that the intradermal dose-saving vaccination route is preferable to the subcutaneous route and that patients in the loCD4 group may require at least one booster to generate an efficient response of specific T cells for mpox, wrote the authors.
“This study has two relevant points,” study author Robert Güerri-Fernandez, MD, PhD, head of infectious diseases at the Hospital del Mar Medical Research Institute, told this news organization. “In the subgroup of patients with HIV with effective treatment but without an immune response (ie, loCD4), the vaccine response is worse than in people who have recovered immunity or do not have HIV. Therefore, they need a booster dose.
“The second point is that the intradermal route with one-fifth of the standard subcutaneous dose has a better immune response than the standard subcutaneous route.” He added that it was a good strategy to save doses and be able to vaccinate many more people when vaccine shortages occurred.
“A general conclusion cannot be drawn,” he said. “It needs to be validated with many more subjects, of course, but in some way, it reinforced our confidence in the strategy of health authorities to promote intradermal vaccination. There we had evidence that the patients we were vaccinating intradermally were responding well.”
In Spain, although there is no shortage of vaccines today, they continue to be administered intradermally with a fractionated dose equivalent to one fifth of a standard dose, said Dr. Güerri-Fernandez.
However, in his opinion, observations regarding the two administration routes signal a need for further research. The main message should be that for patients with HIV infection who do not have an immune response, the vaccine response is incomplete, and they need booster doses as well as monitoring of the vaccine immune response, said Dr. Güerri-Fernandez.
More Studies Required
The research, which prospectively collected data and blood samples from patients with HIV who received the JYNNEOS vaccine, is small and included only 24 patients with HIV infection, with seven hospital workers who also received the vaccine and seven unvaccinated individuals as controls. “I am one of the control subjects of the study, and intradermal vaccination is not especially pleasant,” said Dr. Güerri-Fernandez. “It is a very innervated area, and the moment of introducing the liquid is uncomfortable. But it is perfectly bearable.”
Outpatient HIV-infected patients from the Infectious Diseases Unit of Hospital del Mar on antiretroviral therapy and with undetectable viral loads were grouped according to their CD4+ T-lymphocyte counts. Those with CD4+ T-lymphocyte counts ≤ 500/mm3 required at least one booster vaccine to exhibit efficient virus-specific T-lymphocyte responses. The magnitude of the T-cell response after this booster correlated directly with the CD4+ T-lymphocyte count of those vaccinated.
For Argentine infectious disease specialist Julián García, MD, clinical researcher at the Huésped Foundation in Buenos Aires, Argentina, who did not participate in the study, it is always productive to know that T-cell responses develop in patients with HIV infection, with CD4+ T-lymphocyte counts > and < 500/mm3, through an intradermal administration route.
Dr. García emphasized that the most novel aspect is that the JYNNEOS vaccine induces a specific T-cell response in patients with HIV infection that increases with higher CD4+ T-lymphocyte levels. However, he noted that the number of patients was less than 10 in most study groups, and the control group had only intradermal administration, which limits the interpretation of the results. “It will be necessary to verify this in studies with larger groups with control groups from all routes and with a correlate of protection.”
Dr. García referred to this latter point as a significant source of uncertainty. “The study is fundamentally based on the cellular response, but nowadays, there is no immune correlate of real-life protection.” He concluded that the study builds knowledge, which is essential for a vaccine that began to be used for mpox and the effectiveness of which is based on estimates.
Dr. Güerri-Fernandez and Dr. Garcia declared no relevant financial conflicts of interest.
This story was translated from the Medscape Spanish edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.
The smallpox vaccine effectively induces immunity against mpox virus infection (formerly simian smallpox) in patients with human immunodeficiency virus (HIV) infection, although patients with lymphocyte counts below 500 cells/mm3 require booster doses, according to data from a study published in the Journal of Medical Virology.
The data come from the prospective observational study conducted by researchers at the Infection Biology Laboratory of the Department of Medicine and Life Sciences at Pompeu Fabra University and the HIV Unit of the Hospital del Mar Medical Research Institute in Barcelona, Spain. The investigators analyzed T-cell responses induced by vaccination with JYNNEOS.
Despite the substantial decrease in the reporting frequency of mpox cases from the global peak in August 2022 (30,894 cases) to 804 monthly cases in the last six months of 2023, mpox continues to circulate, and there is no specific vaccine. The JYNNEOS vaccine, with protective cross-reactivity against orthopoxviruses, is approved by the US Food and Drug Administration and the European Medicines Agency for the prevention of smallpox and mpox in adults at high risk for infection.
During the 2022 outbreak in the United States and Europe, vaccine shortages led to the emergency use authorization of a lower intradermal dose. This strategy was aimed at increasing vaccine supply up to fivefold.
Further clinical trials are needed to evaluate responses to JYNNEOS vaccination and compare different administration routes in patients with HIV infection. Protecting this population against mpox is a priority because people with high viral loads or loCD4+ T-lymphocyte counts are especially susceptible to severe disease.
Vaccination Responses
The study assessed the immune response to the JYNNEOS vaccine in patients with HIV who were receiving antiretroviral therapy as outpatients at the Infectious Diseases Unit of Hospital del Mar in Barcelona, Spain. Participants had viral loads controlled by antiretroviral therapy and CD4+ T-lymphocyte counts ≤ 500/mm3 (loCD4 group) or ≥ 500/mm3 (hiCD4 group) in blood. Vaccine responses were compared with those of vaccinated controls without the disease. The study included cases that received the standard subcutaneous vaccine (before August 2022) or the emergency dose-saving intradermal vaccine after its approval in August 2022.
The results demonstrated that the intradermal dose-saving vaccination route is preferable to the subcutaneous route and that patients in the loCD4 group may require at least one booster to generate an efficient response of specific T cells for mpox, wrote the authors.
“This study has two relevant points,” study author Robert Güerri-Fernandez, MD, PhD, head of infectious diseases at the Hospital del Mar Medical Research Institute, told this news organization. “In the subgroup of patients with HIV with effective treatment but without an immune response (ie, loCD4), the vaccine response is worse than in people who have recovered immunity or do not have HIV. Therefore, they need a booster dose.
“The second point is that the intradermal route with one-fifth of the standard subcutaneous dose has a better immune response than the standard subcutaneous route.” He added that it was a good strategy to save doses and be able to vaccinate many more people when vaccine shortages occurred.
“A general conclusion cannot be drawn,” he said. “It needs to be validated with many more subjects, of course, but in some way, it reinforced our confidence in the strategy of health authorities to promote intradermal vaccination. There we had evidence that the patients we were vaccinating intradermally were responding well.”
In Spain, although there is no shortage of vaccines today, they continue to be administered intradermally with a fractionated dose equivalent to one fifth of a standard dose, said Dr. Güerri-Fernandez.
However, in his opinion, observations regarding the two administration routes signal a need for further research. The main message should be that for patients with HIV infection who do not have an immune response, the vaccine response is incomplete, and they need booster doses as well as monitoring of the vaccine immune response, said Dr. Güerri-Fernandez.
More Studies Required
The research, which prospectively collected data and blood samples from patients with HIV who received the JYNNEOS vaccine, is small and included only 24 patients with HIV infection, with seven hospital workers who also received the vaccine and seven unvaccinated individuals as controls. “I am one of the control subjects of the study, and intradermal vaccination is not especially pleasant,” said Dr. Güerri-Fernandez. “It is a very innervated area, and the moment of introducing the liquid is uncomfortable. But it is perfectly bearable.”
Outpatient HIV-infected patients from the Infectious Diseases Unit of Hospital del Mar on antiretroviral therapy and with undetectable viral loads were grouped according to their CD4+ T-lymphocyte counts. Those with CD4+ T-lymphocyte counts ≤ 500/mm3 required at least one booster vaccine to exhibit efficient virus-specific T-lymphocyte responses. The magnitude of the T-cell response after this booster correlated directly with the CD4+ T-lymphocyte count of those vaccinated.
For Argentine infectious disease specialist Julián García, MD, clinical researcher at the Huésped Foundation in Buenos Aires, Argentina, who did not participate in the study, it is always productive to know that T-cell responses develop in patients with HIV infection, with CD4+ T-lymphocyte counts > and < 500/mm3, through an intradermal administration route.
Dr. García emphasized that the most novel aspect is that the JYNNEOS vaccine induces a specific T-cell response in patients with HIV infection that increases with higher CD4+ T-lymphocyte levels. However, he noted that the number of patients was less than 10 in most study groups, and the control group had only intradermal administration, which limits the interpretation of the results. “It will be necessary to verify this in studies with larger groups with control groups from all routes and with a correlate of protection.”
Dr. García referred to this latter point as a significant source of uncertainty. “The study is fundamentally based on the cellular response, but nowadays, there is no immune correlate of real-life protection.” He concluded that the study builds knowledge, which is essential for a vaccine that began to be used for mpox and the effectiveness of which is based on estimates.
Dr. Güerri-Fernandez and Dr. Garcia declared no relevant financial conflicts of interest.
This story was translated from the Medscape Spanish edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.
Does Bariatric Surgery Increase or Decrease Cancer Risk? It Depends.
Bariatric surgery appears to decrease the risk for some cancers, but it may increase the risk for others, particularly colorectal cancer (CRC), according to a synthesis of current evidence.
“There has been a recent burst of studies examining the association between bariatric surgery and the longitudinal risks of developing cancer,” corresponding author Zhi Ven Fong, MD, MPH, DrPH, surgical oncologist, Mayo Clinic Arizona, Phoenix, said in an interview. “However, there has not been a rigorous and critical analysis of the data published to date.”
In evaluating research showing an association between bariatric surgery and longitudinal cancer risk, the investigators found that the quality of the studies and their findings are “heterogeneous and might be susceptible to bias,” Dr. Fong said.
Bariatric surgery appears to have the strongest and most consistent association with the reduction of breast, ovarian, and endometrial cancer risk, first author Pei-Wen Lim, MD, MS, bariatric surgeon at Mayo Clinic Arizona, Phoenix, told this news organization. “However, there have been concerning signals from preclinical and epidemiological studies that bariatric surgery may be associated with a higher risk of developing colorectal cancers,” she added.
The authors cautioned against certain changes in clinical management.
“First, cancer surveillance frequency should not be altered after bariatric surgery because of any assumed reduction in longitudinal cancer risk, and surveillance strategy should mirror that of an average-risk individual,” they wrote. “Secondly, the indications for bariatric surgery should not be expanded for the purpose of cancer-risk mitigation.”
The review was published online in JAMA Surgery.
Protection Against Hormone-Related Cancers
The authors pointed to several studies that appear to support the association between bariatric surgery and decreased risk for hormone-related cancers.
Among them is an observational study of 6781 patients in Canada that showed a significant reduction in breast cancer risk at a median follow-up of 5 years in those who had bariatric surgery vs those who did not (P = .01).
The largest study to date on risk for hormone-related cancer after bariatric surgery was conducted using New York State data for 302,883 women.
It showed a lower rate of breast, endometrial, and ovarian cancers after bariatric surgery (hazard ratio [HR], 0.78; P < .001), with Roux-en-Y gastric bypass conferring the greatest benefit compared with laparoscopic sleeve gastrectomy (HR, 0.66; P = .006) and laparoscopic adjustable gastric banding (HR, 0.83; P = .006).
Beyond the shared mechanisms explaining obesity and cancer risk, a proposed explanation for the strong, consistent association between bariatric surgery and hormone-sensitive cancers is the role obesity-related changes in estrogen stimulation play in development of such cancers, the authors noted.
Association With GI Cancers
The association between bariatric surgery and development of esophageal, gastric, liver, and pancreas cancers is less clear. The data are heterogeneous, with studies showing either no association or decreased longitudinal incidence, the authors reported.
The data are also mixed when it comes to CRC. Epidemiological studies have demonstrated decreased longitudinal incidence of colon and rectal cancer after bariatric surgery; however, two studies have suggested an increased CRC risk after bariatric surgery, the authors noted.
A 15-year study from England that matched 8794 patients with obesity who underwent bariatric surgery with 8794 patients with obesity who did not have the surgery showed that gastric bypass (but not gastric banding or sleeve gastrectomy) was associated with a greater than twofold increased risk of developing colon and rectal cancer (odds ratio, 2.63).
These findings were corroborated in a Swedish cohort study with more than 10 years of follow-up data.
One potential explanation for the heterogeneous findings is that “present studies do not discriminate the sub-types of colon and rectal cancer, with bariatric surgery possibly increasing the incidence of colitis-associated cancers but not hereditary cancers,” the authors wrote.
“The mechanism by which gastric bypass may increase the risk of colorectal cancer is through changes in the gut’s microbiome. These changes in gut flora may triumph the protective effect of weight loss on the development of colorectal cancers,” Dr. Fong said.
Prospective studies are necessary to better delineate CRC risk after bariatric surgery, the authors wrote.
Benefits Outweigh Risk
“Ultimately, it has been proven that bariatric surgery saves lives by improving the metabolic profile of patients with obesity through reduction in cardiovascular risk factors such as hypertension, diabetes, and nonalcoholic fatty liver disease,” Dr. Lim said.
“If patients qualify for bariatric surgery on the basis of their BMI or comorbidities, they should pursue it for its metabolic benefits, but perhaps consider timely or closer-interval screening colonoscopies to monitor for potential colorectal cancer development,” Dr. Lim added.
When asked to comment on the review, Marina Kurian, MD, president, American Society for Metabolic and Bariatric Surgery, also pointed to the advantages of bariatric surgery in reducing major adverse cardiovascular events and improving hypertension, hyperlipidemia, and diabetes.
Bariatric surgery reduces many types of cancers, although the data specific to CRC risk with bariatric surgery are mixed, she added.
“The jury is still out,” said Dr. Kurian, clinical professor of surgery at NYU Langone Health in New York, who was not involved in the review. “There are papers and meta-analyses that show benefit even in colorectal cancer, but then there are a couple of papers out there that suggest a risk that seems to be specific to men.
“It could just be a numbers game, where we may not have enough data. We need more granular data that will help address these nuances and really determine what is the actual risk,” Dr. Kurian said. “But overall, for cancer, bariatric surgery is a win.”
This research had no specific funding. Dr. Fong and Dr. Lim had no relevant disclosures. Dr. Kurian disclosed relationships with Allergan, Allurion, CineMed, CSATS, Ezisurg Medical, Hernon, Johnson & Johnson, Medtronic, Novo, Stryker, and Vivus.
A version of this article appeared on Medscape.com.
Bariatric surgery appears to decrease the risk for some cancers, but it may increase the risk for others, particularly colorectal cancer (CRC), according to a synthesis of current evidence.
“There has been a recent burst of studies examining the association between bariatric surgery and the longitudinal risks of developing cancer,” corresponding author Zhi Ven Fong, MD, MPH, DrPH, surgical oncologist, Mayo Clinic Arizona, Phoenix, said in an interview. “However, there has not been a rigorous and critical analysis of the data published to date.”
In evaluating research showing an association between bariatric surgery and longitudinal cancer risk, the investigators found that the quality of the studies and their findings are “heterogeneous and might be susceptible to bias,” Dr. Fong said.
Bariatric surgery appears to have the strongest and most consistent association with the reduction of breast, ovarian, and endometrial cancer risk, first author Pei-Wen Lim, MD, MS, bariatric surgeon at Mayo Clinic Arizona, Phoenix, told this news organization. “However, there have been concerning signals from preclinical and epidemiological studies that bariatric surgery may be associated with a higher risk of developing colorectal cancers,” she added.
The authors cautioned against certain changes in clinical management.
“First, cancer surveillance frequency should not be altered after bariatric surgery because of any assumed reduction in longitudinal cancer risk, and surveillance strategy should mirror that of an average-risk individual,” they wrote. “Secondly, the indications for bariatric surgery should not be expanded for the purpose of cancer-risk mitigation.”
The review was published online in JAMA Surgery.
Protection Against Hormone-Related Cancers
The authors pointed to several studies that appear to support the association between bariatric surgery and decreased risk for hormone-related cancers.
Among them is an observational study of 6781 patients in Canada that showed a significant reduction in breast cancer risk at a median follow-up of 5 years in those who had bariatric surgery vs those who did not (P = .01).
The largest study to date on risk for hormone-related cancer after bariatric surgery was conducted using New York State data for 302,883 women.
It showed a lower rate of breast, endometrial, and ovarian cancers after bariatric surgery (hazard ratio [HR], 0.78; P < .001), with Roux-en-Y gastric bypass conferring the greatest benefit compared with laparoscopic sleeve gastrectomy (HR, 0.66; P = .006) and laparoscopic adjustable gastric banding (HR, 0.83; P = .006).
Beyond the shared mechanisms explaining obesity and cancer risk, a proposed explanation for the strong, consistent association between bariatric surgery and hormone-sensitive cancers is the role obesity-related changes in estrogen stimulation play in development of such cancers, the authors noted.
Association With GI Cancers
The association between bariatric surgery and development of esophageal, gastric, liver, and pancreas cancers is less clear. The data are heterogeneous, with studies showing either no association or decreased longitudinal incidence, the authors reported.
The data are also mixed when it comes to CRC. Epidemiological studies have demonstrated decreased longitudinal incidence of colon and rectal cancer after bariatric surgery; however, two studies have suggested an increased CRC risk after bariatric surgery, the authors noted.
A 15-year study from England that matched 8794 patients with obesity who underwent bariatric surgery with 8794 patients with obesity who did not have the surgery showed that gastric bypass (but not gastric banding or sleeve gastrectomy) was associated with a greater than twofold increased risk of developing colon and rectal cancer (odds ratio, 2.63).
These findings were corroborated in a Swedish cohort study with more than 10 years of follow-up data.
One potential explanation for the heterogeneous findings is that “present studies do not discriminate the sub-types of colon and rectal cancer, with bariatric surgery possibly increasing the incidence of colitis-associated cancers but not hereditary cancers,” the authors wrote.
“The mechanism by which gastric bypass may increase the risk of colorectal cancer is through changes in the gut’s microbiome. These changes in gut flora may triumph the protective effect of weight loss on the development of colorectal cancers,” Dr. Fong said.
Prospective studies are necessary to better delineate CRC risk after bariatric surgery, the authors wrote.
Benefits Outweigh Risk
“Ultimately, it has been proven that bariatric surgery saves lives by improving the metabolic profile of patients with obesity through reduction in cardiovascular risk factors such as hypertension, diabetes, and nonalcoholic fatty liver disease,” Dr. Lim said.
“If patients qualify for bariatric surgery on the basis of their BMI or comorbidities, they should pursue it for its metabolic benefits, but perhaps consider timely or closer-interval screening colonoscopies to monitor for potential colorectal cancer development,” Dr. Lim added.
When asked to comment on the review, Marina Kurian, MD, president, American Society for Metabolic and Bariatric Surgery, also pointed to the advantages of bariatric surgery in reducing major adverse cardiovascular events and improving hypertension, hyperlipidemia, and diabetes.
Bariatric surgery reduces many types of cancers, although the data specific to CRC risk with bariatric surgery are mixed, she added.
“The jury is still out,” said Dr. Kurian, clinical professor of surgery at NYU Langone Health in New York, who was not involved in the review. “There are papers and meta-analyses that show benefit even in colorectal cancer, but then there are a couple of papers out there that suggest a risk that seems to be specific to men.
“It could just be a numbers game, where we may not have enough data. We need more granular data that will help address these nuances and really determine what is the actual risk,” Dr. Kurian said. “But overall, for cancer, bariatric surgery is a win.”
This research had no specific funding. Dr. Fong and Dr. Lim had no relevant disclosures. Dr. Kurian disclosed relationships with Allergan, Allurion, CineMed, CSATS, Ezisurg Medical, Hernon, Johnson & Johnson, Medtronic, Novo, Stryker, and Vivus.
A version of this article appeared on Medscape.com.
Bariatric surgery appears to decrease the risk for some cancers, but it may increase the risk for others, particularly colorectal cancer (CRC), according to a synthesis of current evidence.
“There has been a recent burst of studies examining the association between bariatric surgery and the longitudinal risks of developing cancer,” corresponding author Zhi Ven Fong, MD, MPH, DrPH, surgical oncologist, Mayo Clinic Arizona, Phoenix, said in an interview. “However, there has not been a rigorous and critical analysis of the data published to date.”
In evaluating research showing an association between bariatric surgery and longitudinal cancer risk, the investigators found that the quality of the studies and their findings are “heterogeneous and might be susceptible to bias,” Dr. Fong said.
Bariatric surgery appears to have the strongest and most consistent association with the reduction of breast, ovarian, and endometrial cancer risk, first author Pei-Wen Lim, MD, MS, bariatric surgeon at Mayo Clinic Arizona, Phoenix, told this news organization. “However, there have been concerning signals from preclinical and epidemiological studies that bariatric surgery may be associated with a higher risk of developing colorectal cancers,” she added.
The authors cautioned against certain changes in clinical management.
“First, cancer surveillance frequency should not be altered after bariatric surgery because of any assumed reduction in longitudinal cancer risk, and surveillance strategy should mirror that of an average-risk individual,” they wrote. “Secondly, the indications for bariatric surgery should not be expanded for the purpose of cancer-risk mitigation.”
The review was published online in JAMA Surgery.
Protection Against Hormone-Related Cancers
The authors pointed to several studies that appear to support the association between bariatric surgery and decreased risk for hormone-related cancers.
Among them is an observational study of 6781 patients in Canada that showed a significant reduction in breast cancer risk at a median follow-up of 5 years in those who had bariatric surgery vs those who did not (P = .01).
The largest study to date on risk for hormone-related cancer after bariatric surgery was conducted using New York State data for 302,883 women.
It showed a lower rate of breast, endometrial, and ovarian cancers after bariatric surgery (hazard ratio [HR], 0.78; P < .001), with Roux-en-Y gastric bypass conferring the greatest benefit compared with laparoscopic sleeve gastrectomy (HR, 0.66; P = .006) and laparoscopic adjustable gastric banding (HR, 0.83; P = .006).
Beyond the shared mechanisms explaining obesity and cancer risk, a proposed explanation for the strong, consistent association between bariatric surgery and hormone-sensitive cancers is the role obesity-related changes in estrogen stimulation play in development of such cancers, the authors noted.
Association With GI Cancers
The association between bariatric surgery and development of esophageal, gastric, liver, and pancreas cancers is less clear. The data are heterogeneous, with studies showing either no association or decreased longitudinal incidence, the authors reported.
The data are also mixed when it comes to CRC. Epidemiological studies have demonstrated decreased longitudinal incidence of colon and rectal cancer after bariatric surgery; however, two studies have suggested an increased CRC risk after bariatric surgery, the authors noted.
A 15-year study from England that matched 8794 patients with obesity who underwent bariatric surgery with 8794 patients with obesity who did not have the surgery showed that gastric bypass (but not gastric banding or sleeve gastrectomy) was associated with a greater than twofold increased risk of developing colon and rectal cancer (odds ratio, 2.63).
These findings were corroborated in a Swedish cohort study with more than 10 years of follow-up data.
One potential explanation for the heterogeneous findings is that “present studies do not discriminate the sub-types of colon and rectal cancer, with bariatric surgery possibly increasing the incidence of colitis-associated cancers but not hereditary cancers,” the authors wrote.
“The mechanism by which gastric bypass may increase the risk of colorectal cancer is through changes in the gut’s microbiome. These changes in gut flora may triumph the protective effect of weight loss on the development of colorectal cancers,” Dr. Fong said.
Prospective studies are necessary to better delineate CRC risk after bariatric surgery, the authors wrote.
Benefits Outweigh Risk
“Ultimately, it has been proven that bariatric surgery saves lives by improving the metabolic profile of patients with obesity through reduction in cardiovascular risk factors such as hypertension, diabetes, and nonalcoholic fatty liver disease,” Dr. Lim said.
“If patients qualify for bariatric surgery on the basis of their BMI or comorbidities, they should pursue it for its metabolic benefits, but perhaps consider timely or closer-interval screening colonoscopies to monitor for potential colorectal cancer development,” Dr. Lim added.
When asked to comment on the review, Marina Kurian, MD, president, American Society for Metabolic and Bariatric Surgery, also pointed to the advantages of bariatric surgery in reducing major adverse cardiovascular events and improving hypertension, hyperlipidemia, and diabetes.
Bariatric surgery reduces many types of cancers, although the data specific to CRC risk with bariatric surgery are mixed, she added.
“The jury is still out,” said Dr. Kurian, clinical professor of surgery at NYU Langone Health in New York, who was not involved in the review. “There are papers and meta-analyses that show benefit even in colorectal cancer, but then there are a couple of papers out there that suggest a risk that seems to be specific to men.
“It could just be a numbers game, where we may not have enough data. We need more granular data that will help address these nuances and really determine what is the actual risk,” Dr. Kurian said. “But overall, for cancer, bariatric surgery is a win.”
This research had no specific funding. Dr. Fong and Dr. Lim had no relevant disclosures. Dr. Kurian disclosed relationships with Allergan, Allurion, CineMed, CSATS, Ezisurg Medical, Hernon, Johnson & Johnson, Medtronic, Novo, Stryker, and Vivus.
A version of this article appeared on Medscape.com.
Low-Glycemic Index Diet Benefits Mirror Fiber, Whole Grain
TOPLINE:
A diet with a low glycemic index (GI) had protective effects against diabetes and other chronic diseases similar to those of a diet high in fiber and whole grains.
METHODOLOGY:
- A 2019 Lancet report from the World Health Organization promoted fiber and whole grains to manage type 2 diabetes, cardiovascular disease, and cancer but rejected GI as a relevant dietary factor to prevent chronic diseases.
- This meta-analysis assessed the evidence of how GI and glycemic load are associated with four main outcomes and did the same for diets high in fiber and whole grain.
- Researchers identified 10 large prospective cohort studies (each including ≥ 100,000 participants) that assessed associations of GI, glycemic load, and fiber and whole grains with the outcomes of interest.
- The mean age was 56 years, and the mean follow-up duration was 12.6 years.
- The primary outcomes were incidence of type 2 diabetes, cardiovascular diseases and its components, diabetes-related cancers, and all-cause mortality.
TAKEAWAY:
- Compared with low-GI diets, high-GI diets were associated with an increased risk for:
- Type 2 diabetes (relative risk [RR], 1.27; P < .0001)
- Total cardiovascular disease (RR, 1.15; P < .0001)
- Diabetes-related cancers (RR, 1.05; P = .0001)
- All-cause mortality (RR, 1.08; P < .0001), statistically significant in women only.
- Foods with high glycemic load were associated with an increased risk for incident type 2 diabetes (RR, 1.15; P < .0001) and total cardiovascular disease (RR, 1.15; P < .0001) than foods with a low glycemic load.
- A diet high in fiber and whole grains reduced the risk for all four outcomes, with the association being similar to that observed for low-GI diet.
IN PRACTICE:
“These findings justify the combination of GI with fiber and whole grains in dietary recommendations to reduce the risk of diabetes and related chronic diseases,” the authors wrote.
SOURCE:
This study was led by David J.A. Jenkins, MD, Department of Nutritional Sciences, Temerty Faculty of Medicine, University of Toronto, Ontario, Canada, and published online in The Lancet Diabetes & Endocrinology.
LIMITATIONS:
The lack of evaluation or absence of positive effects in some analyses may have led to a paucity of reported studies for some outcomes. Moreover, the findings for some outcomes may have had limited robustness because of a small difference in RR. Furthermore, only one or two cohorts were included to compare most disease outcomes related to GI with fiber and wholegrain exposure.
DISCLOSURES:
This study was funded by Banting and Best and the Karuna Foundation. The authors declared receiving research grants, payments, honoraria, and travel support from and having other ties with food and beverage growers, processors and manufacturers, as well as with foundations, chronic disease advocacy and research groups, professional societies, government organizations, and other sources.
A version of this article appeared on Medscape.com.
TOPLINE:
A diet with a low glycemic index (GI) had protective effects against diabetes and other chronic diseases similar to those of a diet high in fiber and whole grains.
METHODOLOGY:
- A 2019 Lancet report from the World Health Organization promoted fiber and whole grains to manage type 2 diabetes, cardiovascular disease, and cancer but rejected GI as a relevant dietary factor to prevent chronic diseases.
- This meta-analysis assessed the evidence of how GI and glycemic load are associated with four main outcomes and did the same for diets high in fiber and whole grain.
- Researchers identified 10 large prospective cohort studies (each including ≥ 100,000 participants) that assessed associations of GI, glycemic load, and fiber and whole grains with the outcomes of interest.
- The mean age was 56 years, and the mean follow-up duration was 12.6 years.
- The primary outcomes were incidence of type 2 diabetes, cardiovascular diseases and its components, diabetes-related cancers, and all-cause mortality.
TAKEAWAY:
- Compared with low-GI diets, high-GI diets were associated with an increased risk for:
- Type 2 diabetes (relative risk [RR], 1.27; P < .0001)
- Total cardiovascular disease (RR, 1.15; P < .0001)
- Diabetes-related cancers (RR, 1.05; P = .0001)
- All-cause mortality (RR, 1.08; P < .0001), statistically significant in women only.
- Foods with high glycemic load were associated with an increased risk for incident type 2 diabetes (RR, 1.15; P < .0001) and total cardiovascular disease (RR, 1.15; P < .0001) than foods with a low glycemic load.
- A diet high in fiber and whole grains reduced the risk for all four outcomes, with the association being similar to that observed for low-GI diet.
IN PRACTICE:
“These findings justify the combination of GI with fiber and whole grains in dietary recommendations to reduce the risk of diabetes and related chronic diseases,” the authors wrote.
SOURCE:
This study was led by David J.A. Jenkins, MD, Department of Nutritional Sciences, Temerty Faculty of Medicine, University of Toronto, Ontario, Canada, and published online in The Lancet Diabetes & Endocrinology.
LIMITATIONS:
The lack of evaluation or absence of positive effects in some analyses may have led to a paucity of reported studies for some outcomes. Moreover, the findings for some outcomes may have had limited robustness because of a small difference in RR. Furthermore, only one or two cohorts were included to compare most disease outcomes related to GI with fiber and wholegrain exposure.
DISCLOSURES:
This study was funded by Banting and Best and the Karuna Foundation. The authors declared receiving research grants, payments, honoraria, and travel support from and having other ties with food and beverage growers, processors and manufacturers, as well as with foundations, chronic disease advocacy and research groups, professional societies, government organizations, and other sources.
A version of this article appeared on Medscape.com.
TOPLINE:
A diet with a low glycemic index (GI) had protective effects against diabetes and other chronic diseases similar to those of a diet high in fiber and whole grains.
METHODOLOGY:
- A 2019 Lancet report from the World Health Organization promoted fiber and whole grains to manage type 2 diabetes, cardiovascular disease, and cancer but rejected GI as a relevant dietary factor to prevent chronic diseases.
- This meta-analysis assessed the evidence of how GI and glycemic load are associated with four main outcomes and did the same for diets high in fiber and whole grain.
- Researchers identified 10 large prospective cohort studies (each including ≥ 100,000 participants) that assessed associations of GI, glycemic load, and fiber and whole grains with the outcomes of interest.
- The mean age was 56 years, and the mean follow-up duration was 12.6 years.
- The primary outcomes were incidence of type 2 diabetes, cardiovascular diseases and its components, diabetes-related cancers, and all-cause mortality.
TAKEAWAY:
- Compared with low-GI diets, high-GI diets were associated with an increased risk for:
- Type 2 diabetes (relative risk [RR], 1.27; P < .0001)
- Total cardiovascular disease (RR, 1.15; P < .0001)
- Diabetes-related cancers (RR, 1.05; P = .0001)
- All-cause mortality (RR, 1.08; P < .0001), statistically significant in women only.
- Foods with high glycemic load were associated with an increased risk for incident type 2 diabetes (RR, 1.15; P < .0001) and total cardiovascular disease (RR, 1.15; P < .0001) than foods with a low glycemic load.
- A diet high in fiber and whole grains reduced the risk for all four outcomes, with the association being similar to that observed for low-GI diet.
IN PRACTICE:
“These findings justify the combination of GI with fiber and whole grains in dietary recommendations to reduce the risk of diabetes and related chronic diseases,” the authors wrote.
SOURCE:
This study was led by David J.A. Jenkins, MD, Department of Nutritional Sciences, Temerty Faculty of Medicine, University of Toronto, Ontario, Canada, and published online in The Lancet Diabetes & Endocrinology.
LIMITATIONS:
The lack of evaluation or absence of positive effects in some analyses may have led to a paucity of reported studies for some outcomes. Moreover, the findings for some outcomes may have had limited robustness because of a small difference in RR. Furthermore, only one or two cohorts were included to compare most disease outcomes related to GI with fiber and wholegrain exposure.
DISCLOSURES:
This study was funded by Banting and Best and the Karuna Foundation. The authors declared receiving research grants, payments, honoraria, and travel support from and having other ties with food and beverage growers, processors and manufacturers, as well as with foundations, chronic disease advocacy and research groups, professional societies, government organizations, and other sources.
A version of this article appeared on Medscape.com.
Few Pediatricians Comfortable Treating Youth With OUD
An estimated 1 in 100 adolescents ages 12-17 years in the United States have an opioid use disorder (OUD). But fewer than 5% of adolescents with OUD get buprenorphine or naltrexone, though the treatments are recommended by the American Academy of Pediatrics (AAP), new data show.
Meanwhile, adolescent drug overdose deaths more than doubled between 2019 and 2021, with most involving opioids.
Scott E. Hadland, MD, MPH, with the Division of Adolescent and Young Adult Medicine at Mass General for Children in Boston, and colleagues detailed the extent of the treatment gap and barriers to prescribing and caring for youth with OUD in primary care in a research letter published February 26 in JAMA Pediatrics.
Dr. Hadland’s team mailed 1,681 US pediatricians a survey and the response rate was 43.0%. Researchers included in the sample 474 primary care pediatricians who care for adolescents.
Who Should Treat OUD?
Most respondents (average age, 49.5; 74.0% female) agreed or strongly agreed that it is their responsibility to identify substance use disorders (93.9%) and refer patients to treatment (97.4%).
Fewer agreed or strongly agreed that it is their responsibility to treat substance use disorders (20.3%) or prescribe medications (12.4%). Fewer than half of the respondents said they felt prepared or very prepared to counsel adolescents on opioid use (48.3%) compared with those comfortable counseling on alcohol (87.1%), cannabis (81.7%), and e-cigarette use (80.1%; P < .001).
Pediatricians were less likely to provide counseling (63.0%) and more likely to refer patients to care off-site (71.8%) for opioid use than for alcohol (87.7% and 51.7%); cannabis (88.9% and 45.4%); or e-cigarette use (91.6% and 26.5%) (P < .001 for all comparisons).
Training Lacking in Residency Programs
“These results reveal an opportunity for greater workforce training in line with a 2019 survey showing fewer than 1 in 3 US pediatric residency programs included education on prescribing OUD medications,” the authors wrote. Training focused on treating OUD in primary care, including prescribing medications and addressing possible misperceptions, may be needed,” they noted.
The survey predated the elimination in 2023 of the federal buprenorphine waiver requirement, which made prescribing buprenorphine easier, so these results do not reflect any changes from that elimination, they wrote.
Sharon Levy, MD, MPH, chief of the Division of Addiction Medicine at Boston Children’s Hospital and professor of pediatrics at Harvard Medical School in Boston, who was not part of this study, said more education on addiction medicine is needed for general pediatricians.
She said it’s time to push beyond the current framework of Screening, Brief Intervention, Referral to Treatment (SBIRT), because that doesn’t include “prescribing medications to manage withdrawal or suppress cravings or the use of lab testing, both of which could be accomplished in primary care.”
Dr. Levy said she considers substance use disorders the same way she considers other chronic conditions: Most patients can be treated in primary care. “Specialty care and higher levels of care need to be available for patients who are most complicated and/or having a flare of their condition.”
“In my opinion, most teens with opioid use disorder can and should be treated in primary care. I worry about referring teens with opioid use disorder to get medication somewhere else because there are few places that deliver this service to this age group. Additionally, teens and families are not always willing to pursue a referral, and many will get lost along the way.”
Promising Models
At Boston Children’s, she said, the Division of Addiction Medicine has created a consultation call line that primary care providers can call for help with any questions about teen substance use.
After running the consultation for about a year, she said, the program wanted to add ways to help patients directly and hired and trained social workers who can see pediatric patients with substance use problems for counseling via telemedicine. “The program also now supports group therapy for pediatric patients and parents, so that primary care providers can refer patients directly to group therapy,” Dr. Levy said.
The growth of telehealth since the pandemic may allow for new models of care.
“For example, now our Adolescent Substance Use and Addiction Program at Boston Children’s Hospital can provide services, including medication induction and follow-up, virtually,” Dr. Levy said. “This allows us to treat young people anywhere in the state. There have been instances in which a primary care provider referred us patients with OUD and then partnered with us, including performing physicals for teens who could not get to Boston to see us in person. At the end of the day, the more models we can come up with the better.”
Dr. Hadland reported honoraria from the AAP outside the submitted work. Two coauthors reported receiving salary support from the AAP during the conduct of the study. A coauthor reported serving as the chair of the AAP Committee on Substance Use and Prevention outside the submitted work. This work was supported by a grant from the Conrad N. Hilton Foundation via the AAP. Dr. Sharon Levy’s husband, Ofer Levy, MD, PhD, is director of the Precision Vaccines Program at Boston Children’s Hospital.
An estimated 1 in 100 adolescents ages 12-17 years in the United States have an opioid use disorder (OUD). But fewer than 5% of adolescents with OUD get buprenorphine or naltrexone, though the treatments are recommended by the American Academy of Pediatrics (AAP), new data show.
Meanwhile, adolescent drug overdose deaths more than doubled between 2019 and 2021, with most involving opioids.
Scott E. Hadland, MD, MPH, with the Division of Adolescent and Young Adult Medicine at Mass General for Children in Boston, and colleagues detailed the extent of the treatment gap and barriers to prescribing and caring for youth with OUD in primary care in a research letter published February 26 in JAMA Pediatrics.
Dr. Hadland’s team mailed 1,681 US pediatricians a survey and the response rate was 43.0%. Researchers included in the sample 474 primary care pediatricians who care for adolescents.
Who Should Treat OUD?
Most respondents (average age, 49.5; 74.0% female) agreed or strongly agreed that it is their responsibility to identify substance use disorders (93.9%) and refer patients to treatment (97.4%).
Fewer agreed or strongly agreed that it is their responsibility to treat substance use disorders (20.3%) or prescribe medications (12.4%). Fewer than half of the respondents said they felt prepared or very prepared to counsel adolescents on opioid use (48.3%) compared with those comfortable counseling on alcohol (87.1%), cannabis (81.7%), and e-cigarette use (80.1%; P < .001).
Pediatricians were less likely to provide counseling (63.0%) and more likely to refer patients to care off-site (71.8%) for opioid use than for alcohol (87.7% and 51.7%); cannabis (88.9% and 45.4%); or e-cigarette use (91.6% and 26.5%) (P < .001 for all comparisons).
Training Lacking in Residency Programs
“These results reveal an opportunity for greater workforce training in line with a 2019 survey showing fewer than 1 in 3 US pediatric residency programs included education on prescribing OUD medications,” the authors wrote. Training focused on treating OUD in primary care, including prescribing medications and addressing possible misperceptions, may be needed,” they noted.
The survey predated the elimination in 2023 of the federal buprenorphine waiver requirement, which made prescribing buprenorphine easier, so these results do not reflect any changes from that elimination, they wrote.
Sharon Levy, MD, MPH, chief of the Division of Addiction Medicine at Boston Children’s Hospital and professor of pediatrics at Harvard Medical School in Boston, who was not part of this study, said more education on addiction medicine is needed for general pediatricians.
She said it’s time to push beyond the current framework of Screening, Brief Intervention, Referral to Treatment (SBIRT), because that doesn’t include “prescribing medications to manage withdrawal or suppress cravings or the use of lab testing, both of which could be accomplished in primary care.”
Dr. Levy said she considers substance use disorders the same way she considers other chronic conditions: Most patients can be treated in primary care. “Specialty care and higher levels of care need to be available for patients who are most complicated and/or having a flare of their condition.”
“In my opinion, most teens with opioid use disorder can and should be treated in primary care. I worry about referring teens with opioid use disorder to get medication somewhere else because there are few places that deliver this service to this age group. Additionally, teens and families are not always willing to pursue a referral, and many will get lost along the way.”
Promising Models
At Boston Children’s, she said, the Division of Addiction Medicine has created a consultation call line that primary care providers can call for help with any questions about teen substance use.
After running the consultation for about a year, she said, the program wanted to add ways to help patients directly and hired and trained social workers who can see pediatric patients with substance use problems for counseling via telemedicine. “The program also now supports group therapy for pediatric patients and parents, so that primary care providers can refer patients directly to group therapy,” Dr. Levy said.
The growth of telehealth since the pandemic may allow for new models of care.
“For example, now our Adolescent Substance Use and Addiction Program at Boston Children’s Hospital can provide services, including medication induction and follow-up, virtually,” Dr. Levy said. “This allows us to treat young people anywhere in the state. There have been instances in which a primary care provider referred us patients with OUD and then partnered with us, including performing physicals for teens who could not get to Boston to see us in person. At the end of the day, the more models we can come up with the better.”
Dr. Hadland reported honoraria from the AAP outside the submitted work. Two coauthors reported receiving salary support from the AAP during the conduct of the study. A coauthor reported serving as the chair of the AAP Committee on Substance Use and Prevention outside the submitted work. This work was supported by a grant from the Conrad N. Hilton Foundation via the AAP. Dr. Sharon Levy’s husband, Ofer Levy, MD, PhD, is director of the Precision Vaccines Program at Boston Children’s Hospital.
An estimated 1 in 100 adolescents ages 12-17 years in the United States have an opioid use disorder (OUD). But fewer than 5% of adolescents with OUD get buprenorphine or naltrexone, though the treatments are recommended by the American Academy of Pediatrics (AAP), new data show.
Meanwhile, adolescent drug overdose deaths more than doubled between 2019 and 2021, with most involving opioids.
Scott E. Hadland, MD, MPH, with the Division of Adolescent and Young Adult Medicine at Mass General for Children in Boston, and colleagues detailed the extent of the treatment gap and barriers to prescribing and caring for youth with OUD in primary care in a research letter published February 26 in JAMA Pediatrics.
Dr. Hadland’s team mailed 1,681 US pediatricians a survey and the response rate was 43.0%. Researchers included in the sample 474 primary care pediatricians who care for adolescents.
Who Should Treat OUD?
Most respondents (average age, 49.5; 74.0% female) agreed or strongly agreed that it is their responsibility to identify substance use disorders (93.9%) and refer patients to treatment (97.4%).
Fewer agreed or strongly agreed that it is their responsibility to treat substance use disorders (20.3%) or prescribe medications (12.4%). Fewer than half of the respondents said they felt prepared or very prepared to counsel adolescents on opioid use (48.3%) compared with those comfortable counseling on alcohol (87.1%), cannabis (81.7%), and e-cigarette use (80.1%; P < .001).
Pediatricians were less likely to provide counseling (63.0%) and more likely to refer patients to care off-site (71.8%) for opioid use than for alcohol (87.7% and 51.7%); cannabis (88.9% and 45.4%); or e-cigarette use (91.6% and 26.5%) (P < .001 for all comparisons).
Training Lacking in Residency Programs
“These results reveal an opportunity for greater workforce training in line with a 2019 survey showing fewer than 1 in 3 US pediatric residency programs included education on prescribing OUD medications,” the authors wrote. Training focused on treating OUD in primary care, including prescribing medications and addressing possible misperceptions, may be needed,” they noted.
The survey predated the elimination in 2023 of the federal buprenorphine waiver requirement, which made prescribing buprenorphine easier, so these results do not reflect any changes from that elimination, they wrote.
Sharon Levy, MD, MPH, chief of the Division of Addiction Medicine at Boston Children’s Hospital and professor of pediatrics at Harvard Medical School in Boston, who was not part of this study, said more education on addiction medicine is needed for general pediatricians.
She said it’s time to push beyond the current framework of Screening, Brief Intervention, Referral to Treatment (SBIRT), because that doesn’t include “prescribing medications to manage withdrawal or suppress cravings or the use of lab testing, both of which could be accomplished in primary care.”
Dr. Levy said she considers substance use disorders the same way she considers other chronic conditions: Most patients can be treated in primary care. “Specialty care and higher levels of care need to be available for patients who are most complicated and/or having a flare of their condition.”
“In my opinion, most teens with opioid use disorder can and should be treated in primary care. I worry about referring teens with opioid use disorder to get medication somewhere else because there are few places that deliver this service to this age group. Additionally, teens and families are not always willing to pursue a referral, and many will get lost along the way.”
Promising Models
At Boston Children’s, she said, the Division of Addiction Medicine has created a consultation call line that primary care providers can call for help with any questions about teen substance use.
After running the consultation for about a year, she said, the program wanted to add ways to help patients directly and hired and trained social workers who can see pediatric patients with substance use problems for counseling via telemedicine. “The program also now supports group therapy for pediatric patients and parents, so that primary care providers can refer patients directly to group therapy,” Dr. Levy said.
The growth of telehealth since the pandemic may allow for new models of care.
“For example, now our Adolescent Substance Use and Addiction Program at Boston Children’s Hospital can provide services, including medication induction and follow-up, virtually,” Dr. Levy said. “This allows us to treat young people anywhere in the state. There have been instances in which a primary care provider referred us patients with OUD and then partnered with us, including performing physicals for teens who could not get to Boston to see us in person. At the end of the day, the more models we can come up with the better.”
Dr. Hadland reported honoraria from the AAP outside the submitted work. Two coauthors reported receiving salary support from the AAP during the conduct of the study. A coauthor reported serving as the chair of the AAP Committee on Substance Use and Prevention outside the submitted work. This work was supported by a grant from the Conrad N. Hilton Foundation via the AAP. Dr. Sharon Levy’s husband, Ofer Levy, MD, PhD, is director of the Precision Vaccines Program at Boston Children’s Hospital.
FROM JAMA PEDIATRICS
GLP-1s’ Next Target: Male Infertility?
The explosion of interest in glucagon-like peptide 1 receptor agonists (GLP-1 RAs), such as semaglutide and tirzepatide, has raised questions about what therapeutic effects this class of medication might have beyond their current indications for type 2 diabetes and obesity.
Recent clinical trials have recently identified benefits from GLP-1 agents for the heart, liver, and kidneys, but the current evidence base is murkier regarding how the drugs may affect male fertility.
For starters, overweight and obesity are strongly associated with male infertility in several overlapping ways. Obesity can disrupt hormones linked to fertility, increase the risk for defective sperm, adversely affect semen quality, and even make sexual intercourse more difficult due to obesity’s link to erectile dysfunction. As a result, GLP-1 RAs should at least in theory boost male fertility in men who take the drugs to lose weight.
But animal studies and a handful of small trials and observational data point to the potential for GLP-1 RAs to improve male fertility in other ways.
A recent narrative review on GLP-1 RAs and male reproductive health, published in the journal Medicina in December 2023, surveyed the potential of the drugs for male infertility and offered reason for optimism.
Hossein Sadeghi-Nejad, MD, director of urology at NYU Langone Health, New York, and a coauthor of the article, said that one reason he and his colleagues conducted their analysis was the known association between weight loss and an increase in testosterone.
“Most of the animal studies that are out there show that this class of drugs does affect testosterone levels,” Dr. Sadeghi-Nejad said; they wanted to better understand what other evidence showed about GLP-1 agonists and other fertility factors.
Link Between Obesity and Fertility
The recent paper first reviews the well-established link between obesity and poorer fertility outcomes.
“Certainly, obesity poses a significant societal problem with substantial impacts on both overall health and economic aspects,” senior author Ranjith Ramasamy, MD, associate professor of urology and director of the reproductive urology Fellowship program at the University of Miami’s Miller School of Medicine, told this news organization. “The escalating global obesity rates raise concerns, especially in the field of male infertility, where excessive body fat induces intrinsic hormonal changes leading to alterations, eventually, in semen parameters.”
The authors noted that obesity has been linked in the research to worse assisted reproductive technology (ART) outcomes and to subfecundity, taking more than 12 months to achieve pregnancy. They also referenced a systematic review that found men with obesity were more likely to have lower sperm counts and less viable sperm.
“From our standpoint, I think the key point was to raise awareness about the fact that obesity, because of the aromatization of testosterone to estradiol [from excess adipose tissue], will affect the hormonal axis and the availability of testosterone and, therefore, indirectly affects spermatogenesis,” Dr. Sadeghi-Nejad said.
Obesity is also linked to lower levels of inhibin B, which stimulates testosterone secretion in Sertoli cells, which, when combined with the proinflammatory state of obesity, “results in a less favorable environment for sperm production,” he said. Finally, the link between obesity and poorer sexual function further inhibits fertility potential, he added.
Until recently, the primary treatments for obesity in men experiencing fertility problems have been lifestyle modifications or surgical interventions. But the recent approval of GLP-1 RA drugs for obesity present an additional option depending on how these drugs affect other fertility parameters.
Direct or Indirect Effects?
Most of the available evidence on GLP-RAs and sperm parameters comes from preclinical research. One of the few clinical trials, published last year in the Journal of Clinical Medicine, investigated the effects of liraglutide in men with metabolic hypogonadism, a body mass index between (BMI) 30 and 40, and severe erectile dysfunction.
Among the 110 men enrolled in the study, only the 35 participants who said that they were not seeking fatherhood received liraglutide. After 4 months of treatment, these men had significantly improved semen concentration, motility, and morphology than did those wanting to conceive who received conventional fertility treatment. Erectile dysfunction was also more improved in the liraglutide group, according to the researchers.
Though this study demonstrated the potential for liraglutide to treat metabolic hypogonadism, the men in that group also had greater weight loss and BMI reduction than the other participants. The review cited several other studies — albeit small ones — in which weight loss was associated with improvements in sperm parameters, including one randomized controlled trial in which one group lost weight with liraglutide and the other with lifestyle modifications; both groups showed increases in the concentration and number of sperm.
One of the key questions requiring further research, then, is whether GLP-1 agents have direct effects on male fertility independent of a reduction in obesity. The randomized controlled trials comparing liraglutide and lifestyle modifications failed to find additional effects on semen in the men taking liraglutide; however, the study had only 56 participants, and results from liraglutide cannot be generalized to potential effects of semaglutide or tirzepatide, Dr. Sadeghi-Nejad said.
“Determining the relative contributions of weight loss versus direct drug actions on fertility outcomes remains challenging without robust data,” Dr. Ramasamy said. “While acknowledged that diet and physical activity positively impact fertility, confirming the synergistic role of GLP-1 receptor agonists requires evidence from well-designed randomized clinical trials.”
Rodent studies suggest that GLP-1 RAs may independently affect testicular function because GLP-1 receptors exist in Sertoli and Leydig cells of the testes. In one study, for example, obese mice who received the GLP-1 agonist exenatide for 8 weeks had “improved sperm motility, DNA integrity, and decreased expression of pro-inflammatory cytokines,” the authors of the review reported. But the precise mechanisms aren’t well understood.
“We know that there are GLP-1 receptors in the reproductive tract, but the extent of the downstream effect of stimulating those receptors, I don’t think we know well,” said John P. Lindsey II, MD, MEng, assistant professor of urology at University of California San Francisco Health.
Other hormonal effects of GLP-1 agonists, such as stimulating insulin production and better regulating blood glucose levels, are better understood, said Raevti Bole, MD, a urologist at Cleveland Clinic, in Ohio, but still other effects of the drugs may not yet be identified.
“I think the really big unknown is whether these types of drugs have effects that are not hormonal on male fertility and what those effects are, and how those affect sperm,” Dr. Bole said. “For example, we know that these drugs slow gastric emptying. Is it possible that slow gastric emptying affects some of the nutrients that you absorb, and that could affect fertility?” Similarly, she said, it’s not clear whether GLP-1 agonists would have any effects on the thyroid that could then affect fertility.
Effects on Offspring
Another open question about GLP-1 RAs and male fertility is their potential effects on the offspring, said Sriram Machineni, MBBS, associate professor of endocrinology at the Albert Einstein College of Medicine in New York City. The clinical trials involving the drugs for treating type 2 diabetes and obesity required both men and women to use contraception. If sperm contributing to a pregnancy are exposed to a GLP-1 agent, “we don’t know what the consequences could be,” Dr. Machineni said. “Just increasing the fertility of the man is not enough. We need to make sure it’s safe long-term for the fetus.”
Dr. Bole also pointed out the need for understanding potential effects in the fetus.
“We know that there are epigenetic changes that can happen to sperm that are influenced by the lifestyle and the physical health and environment of the parent,” Dr. Bole said. “So how could these drugs potentially affect those epigenetic changes that then potentially are passed on to the offspring? We don’t know that.”
An ideal source for that data would be a cohort registry of people who are taking the medication and then cause a pregnancy. “They have a registry for pregnant women,” Dr. Machineni said, “but we need something similar for men.”
Dr. Sadeghi-Nejad said that he and his coauthors are working on developing a registry for men who take GLP-1 RAs that would enable long-term tracking of multiple andrologic outcomes, including fertility and sexual dysfunction. Such a registry could theoretically be useful in tracking pregnancy and offspring outcomes as well.
Too Soon for Prescribing
Additional options for treating fertility in men with obesity would be welcome. Current treatments include the selective estrogen receptor modulator (SERM) clomiphene citrate and the aromatase inhibitor anastrozole. But these have their drawbacks, Dr. Sadeghi-Nejad pointed out; in the overweight population in particular, they “are not necessarily ideal,” he said.
“Although both are viable treatments for enhancing hormonal balance and semen parameters, clomiphene citrate has rare but documented side effects, including thromboembolism, gastrointestinal distress and occasional weight gain in men,” Dr. Sadeghi-Nejad and his colleagues wrote. “Furthermore, despite clomiphene citrate’s association with significant increases in sperm concentration, it is not universally effective, with a meta-analysis indicating a significant increase in sperm concentration in approximately 60% of men.”
For men who have obesity and oligospermia but normal levels of testosterone and estradiol, “conventional pharmaceutical approaches like clomiphene may not be suitable,” the authors wrote.
Still, GLP-1 RAs may have a role to play for this population.
“I think it is within the wheelhouse of a reproductive urologist to consider those types of medications,” Dr. Lindsey said. For example, for a patient who has overweight or obesity, “does it make sense to think about doing clomiphene therapy, which we often do for someone who has low testosterone, in conjunction [with a GLP-1 agonist]? Maybe there’s a kind of an additive effect of having both on board.”
Dr. Ramasamy similarly noted that GLP-1 agonists cannot replace SERMs but may work “synergistically” with them.
“Despite the established popularity of GLP-1 receptor agonists, there may be some reluctance among urologists and fertility specialists to prescribe them, with some others advocating for their use to enhance semen parameters,” Dr. Ramasamy said. “However, robust scientific evidence is still lacking, necessitating caution and a wait for more substantial data.”
Even if GLP-1 RAs prove to have therapeutic benefit for fertility, considerations such as availability and cost may affect prescribing.
“We do currently have safe and effective drugs that we use for male fertility, and those are generally nowhere near as expensive,” Dr. Bole said. “When we start talking about another drug that we can add, we have to think about the efficacy and the potential side effect but also, is this affordable for patients?”
Eventually, once more evidence become available, all of the urologists who spoke with this news organization said that they expect discussion about the possible therapeutic utility of GLP-1 agonists to make its way into clinical guidelines.
“Obesity is such a huge impediment for fertility in the modern environment,” Dr. Machineni said. “We will have to clarify the use of these agents, so I think this will be a part of the guidelines some point, but I think we need more information.”
The research was funded by the National Institute of Diabetes and Digestive and Kidney Diseases and the American Cancer Society. The review authors and other quoted physicians reported no disclosures. Dr. Machineni has consulted for Novo Nordisk and Lilly and has conducted clinical trials with semaglutide and tirzepatide for those companies.
A version of this article appeared on Medscape.com.
The explosion of interest in glucagon-like peptide 1 receptor agonists (GLP-1 RAs), such as semaglutide and tirzepatide, has raised questions about what therapeutic effects this class of medication might have beyond their current indications for type 2 diabetes and obesity.
Recent clinical trials have recently identified benefits from GLP-1 agents for the heart, liver, and kidneys, but the current evidence base is murkier regarding how the drugs may affect male fertility.
For starters, overweight and obesity are strongly associated with male infertility in several overlapping ways. Obesity can disrupt hormones linked to fertility, increase the risk for defective sperm, adversely affect semen quality, and even make sexual intercourse more difficult due to obesity’s link to erectile dysfunction. As a result, GLP-1 RAs should at least in theory boost male fertility in men who take the drugs to lose weight.
But animal studies and a handful of small trials and observational data point to the potential for GLP-1 RAs to improve male fertility in other ways.
A recent narrative review on GLP-1 RAs and male reproductive health, published in the journal Medicina in December 2023, surveyed the potential of the drugs for male infertility and offered reason for optimism.
Hossein Sadeghi-Nejad, MD, director of urology at NYU Langone Health, New York, and a coauthor of the article, said that one reason he and his colleagues conducted their analysis was the known association between weight loss and an increase in testosterone.
“Most of the animal studies that are out there show that this class of drugs does affect testosterone levels,” Dr. Sadeghi-Nejad said; they wanted to better understand what other evidence showed about GLP-1 agonists and other fertility factors.
Link Between Obesity and Fertility
The recent paper first reviews the well-established link between obesity and poorer fertility outcomes.
“Certainly, obesity poses a significant societal problem with substantial impacts on both overall health and economic aspects,” senior author Ranjith Ramasamy, MD, associate professor of urology and director of the reproductive urology Fellowship program at the University of Miami’s Miller School of Medicine, told this news organization. “The escalating global obesity rates raise concerns, especially in the field of male infertility, where excessive body fat induces intrinsic hormonal changes leading to alterations, eventually, in semen parameters.”
The authors noted that obesity has been linked in the research to worse assisted reproductive technology (ART) outcomes and to subfecundity, taking more than 12 months to achieve pregnancy. They also referenced a systematic review that found men with obesity were more likely to have lower sperm counts and less viable sperm.
“From our standpoint, I think the key point was to raise awareness about the fact that obesity, because of the aromatization of testosterone to estradiol [from excess adipose tissue], will affect the hormonal axis and the availability of testosterone and, therefore, indirectly affects spermatogenesis,” Dr. Sadeghi-Nejad said.
Obesity is also linked to lower levels of inhibin B, which stimulates testosterone secretion in Sertoli cells, which, when combined with the proinflammatory state of obesity, “results in a less favorable environment for sperm production,” he said. Finally, the link between obesity and poorer sexual function further inhibits fertility potential, he added.
Until recently, the primary treatments for obesity in men experiencing fertility problems have been lifestyle modifications or surgical interventions. But the recent approval of GLP-1 RA drugs for obesity present an additional option depending on how these drugs affect other fertility parameters.
Direct or Indirect Effects?
Most of the available evidence on GLP-RAs and sperm parameters comes from preclinical research. One of the few clinical trials, published last year in the Journal of Clinical Medicine, investigated the effects of liraglutide in men with metabolic hypogonadism, a body mass index between (BMI) 30 and 40, and severe erectile dysfunction.
Among the 110 men enrolled in the study, only the 35 participants who said that they were not seeking fatherhood received liraglutide. After 4 months of treatment, these men had significantly improved semen concentration, motility, and morphology than did those wanting to conceive who received conventional fertility treatment. Erectile dysfunction was also more improved in the liraglutide group, according to the researchers.
Though this study demonstrated the potential for liraglutide to treat metabolic hypogonadism, the men in that group also had greater weight loss and BMI reduction than the other participants. The review cited several other studies — albeit small ones — in which weight loss was associated with improvements in sperm parameters, including one randomized controlled trial in which one group lost weight with liraglutide and the other with lifestyle modifications; both groups showed increases in the concentration and number of sperm.
One of the key questions requiring further research, then, is whether GLP-1 agents have direct effects on male fertility independent of a reduction in obesity. The randomized controlled trials comparing liraglutide and lifestyle modifications failed to find additional effects on semen in the men taking liraglutide; however, the study had only 56 participants, and results from liraglutide cannot be generalized to potential effects of semaglutide or tirzepatide, Dr. Sadeghi-Nejad said.
“Determining the relative contributions of weight loss versus direct drug actions on fertility outcomes remains challenging without robust data,” Dr. Ramasamy said. “While acknowledged that diet and physical activity positively impact fertility, confirming the synergistic role of GLP-1 receptor agonists requires evidence from well-designed randomized clinical trials.”
Rodent studies suggest that GLP-1 RAs may independently affect testicular function because GLP-1 receptors exist in Sertoli and Leydig cells of the testes. In one study, for example, obese mice who received the GLP-1 agonist exenatide for 8 weeks had “improved sperm motility, DNA integrity, and decreased expression of pro-inflammatory cytokines,” the authors of the review reported. But the precise mechanisms aren’t well understood.
“We know that there are GLP-1 receptors in the reproductive tract, but the extent of the downstream effect of stimulating those receptors, I don’t think we know well,” said John P. Lindsey II, MD, MEng, assistant professor of urology at University of California San Francisco Health.
Other hormonal effects of GLP-1 agonists, such as stimulating insulin production and better regulating blood glucose levels, are better understood, said Raevti Bole, MD, a urologist at Cleveland Clinic, in Ohio, but still other effects of the drugs may not yet be identified.
“I think the really big unknown is whether these types of drugs have effects that are not hormonal on male fertility and what those effects are, and how those affect sperm,” Dr. Bole said. “For example, we know that these drugs slow gastric emptying. Is it possible that slow gastric emptying affects some of the nutrients that you absorb, and that could affect fertility?” Similarly, she said, it’s not clear whether GLP-1 agonists would have any effects on the thyroid that could then affect fertility.
Effects on Offspring
Another open question about GLP-1 RAs and male fertility is their potential effects on the offspring, said Sriram Machineni, MBBS, associate professor of endocrinology at the Albert Einstein College of Medicine in New York City. The clinical trials involving the drugs for treating type 2 diabetes and obesity required both men and women to use contraception. If sperm contributing to a pregnancy are exposed to a GLP-1 agent, “we don’t know what the consequences could be,” Dr. Machineni said. “Just increasing the fertility of the man is not enough. We need to make sure it’s safe long-term for the fetus.”
Dr. Bole also pointed out the need for understanding potential effects in the fetus.
“We know that there are epigenetic changes that can happen to sperm that are influenced by the lifestyle and the physical health and environment of the parent,” Dr. Bole said. “So how could these drugs potentially affect those epigenetic changes that then potentially are passed on to the offspring? We don’t know that.”
An ideal source for that data would be a cohort registry of people who are taking the medication and then cause a pregnancy. “They have a registry for pregnant women,” Dr. Machineni said, “but we need something similar for men.”
Dr. Sadeghi-Nejad said that he and his coauthors are working on developing a registry for men who take GLP-1 RAs that would enable long-term tracking of multiple andrologic outcomes, including fertility and sexual dysfunction. Such a registry could theoretically be useful in tracking pregnancy and offspring outcomes as well.
Too Soon for Prescribing
Additional options for treating fertility in men with obesity would be welcome. Current treatments include the selective estrogen receptor modulator (SERM) clomiphene citrate and the aromatase inhibitor anastrozole. But these have their drawbacks, Dr. Sadeghi-Nejad pointed out; in the overweight population in particular, they “are not necessarily ideal,” he said.
“Although both are viable treatments for enhancing hormonal balance and semen parameters, clomiphene citrate has rare but documented side effects, including thromboembolism, gastrointestinal distress and occasional weight gain in men,” Dr. Sadeghi-Nejad and his colleagues wrote. “Furthermore, despite clomiphene citrate’s association with significant increases in sperm concentration, it is not universally effective, with a meta-analysis indicating a significant increase in sperm concentration in approximately 60% of men.”
For men who have obesity and oligospermia but normal levels of testosterone and estradiol, “conventional pharmaceutical approaches like clomiphene may not be suitable,” the authors wrote.
Still, GLP-1 RAs may have a role to play for this population.
“I think it is within the wheelhouse of a reproductive urologist to consider those types of medications,” Dr. Lindsey said. For example, for a patient who has overweight or obesity, “does it make sense to think about doing clomiphene therapy, which we often do for someone who has low testosterone, in conjunction [with a GLP-1 agonist]? Maybe there’s a kind of an additive effect of having both on board.”
Dr. Ramasamy similarly noted that GLP-1 agonists cannot replace SERMs but may work “synergistically” with them.
“Despite the established popularity of GLP-1 receptor agonists, there may be some reluctance among urologists and fertility specialists to prescribe them, with some others advocating for their use to enhance semen parameters,” Dr. Ramasamy said. “However, robust scientific evidence is still lacking, necessitating caution and a wait for more substantial data.”
Even if GLP-1 RAs prove to have therapeutic benefit for fertility, considerations such as availability and cost may affect prescribing.
“We do currently have safe and effective drugs that we use for male fertility, and those are generally nowhere near as expensive,” Dr. Bole said. “When we start talking about another drug that we can add, we have to think about the efficacy and the potential side effect but also, is this affordable for patients?”
Eventually, once more evidence become available, all of the urologists who spoke with this news organization said that they expect discussion about the possible therapeutic utility of GLP-1 agonists to make its way into clinical guidelines.
“Obesity is such a huge impediment for fertility in the modern environment,” Dr. Machineni said. “We will have to clarify the use of these agents, so I think this will be a part of the guidelines some point, but I think we need more information.”
The research was funded by the National Institute of Diabetes and Digestive and Kidney Diseases and the American Cancer Society. The review authors and other quoted physicians reported no disclosures. Dr. Machineni has consulted for Novo Nordisk and Lilly and has conducted clinical trials with semaglutide and tirzepatide for those companies.
A version of this article appeared on Medscape.com.
The explosion of interest in glucagon-like peptide 1 receptor agonists (GLP-1 RAs), such as semaglutide and tirzepatide, has raised questions about what therapeutic effects this class of medication might have beyond their current indications for type 2 diabetes and obesity.
Recent clinical trials have recently identified benefits from GLP-1 agents for the heart, liver, and kidneys, but the current evidence base is murkier regarding how the drugs may affect male fertility.
For starters, overweight and obesity are strongly associated with male infertility in several overlapping ways. Obesity can disrupt hormones linked to fertility, increase the risk for defective sperm, adversely affect semen quality, and even make sexual intercourse more difficult due to obesity’s link to erectile dysfunction. As a result, GLP-1 RAs should at least in theory boost male fertility in men who take the drugs to lose weight.
But animal studies and a handful of small trials and observational data point to the potential for GLP-1 RAs to improve male fertility in other ways.
A recent narrative review on GLP-1 RAs and male reproductive health, published in the journal Medicina in December 2023, surveyed the potential of the drugs for male infertility and offered reason for optimism.
Hossein Sadeghi-Nejad, MD, director of urology at NYU Langone Health, New York, and a coauthor of the article, said that one reason he and his colleagues conducted their analysis was the known association between weight loss and an increase in testosterone.
“Most of the animal studies that are out there show that this class of drugs does affect testosterone levels,” Dr. Sadeghi-Nejad said; they wanted to better understand what other evidence showed about GLP-1 agonists and other fertility factors.
Link Between Obesity and Fertility
The recent paper first reviews the well-established link between obesity and poorer fertility outcomes.
“Certainly, obesity poses a significant societal problem with substantial impacts on both overall health and economic aspects,” senior author Ranjith Ramasamy, MD, associate professor of urology and director of the reproductive urology Fellowship program at the University of Miami’s Miller School of Medicine, told this news organization. “The escalating global obesity rates raise concerns, especially in the field of male infertility, where excessive body fat induces intrinsic hormonal changes leading to alterations, eventually, in semen parameters.”
The authors noted that obesity has been linked in the research to worse assisted reproductive technology (ART) outcomes and to subfecundity, taking more than 12 months to achieve pregnancy. They also referenced a systematic review that found men with obesity were more likely to have lower sperm counts and less viable sperm.
“From our standpoint, I think the key point was to raise awareness about the fact that obesity, because of the aromatization of testosterone to estradiol [from excess adipose tissue], will affect the hormonal axis and the availability of testosterone and, therefore, indirectly affects spermatogenesis,” Dr. Sadeghi-Nejad said.
Obesity is also linked to lower levels of inhibin B, which stimulates testosterone secretion in Sertoli cells, which, when combined with the proinflammatory state of obesity, “results in a less favorable environment for sperm production,” he said. Finally, the link between obesity and poorer sexual function further inhibits fertility potential, he added.
Until recently, the primary treatments for obesity in men experiencing fertility problems have been lifestyle modifications or surgical interventions. But the recent approval of GLP-1 RA drugs for obesity present an additional option depending on how these drugs affect other fertility parameters.
Direct or Indirect Effects?
Most of the available evidence on GLP-RAs and sperm parameters comes from preclinical research. One of the few clinical trials, published last year in the Journal of Clinical Medicine, investigated the effects of liraglutide in men with metabolic hypogonadism, a body mass index between (BMI) 30 and 40, and severe erectile dysfunction.
Among the 110 men enrolled in the study, only the 35 participants who said that they were not seeking fatherhood received liraglutide. After 4 months of treatment, these men had significantly improved semen concentration, motility, and morphology than did those wanting to conceive who received conventional fertility treatment. Erectile dysfunction was also more improved in the liraglutide group, according to the researchers.
Though this study demonstrated the potential for liraglutide to treat metabolic hypogonadism, the men in that group also had greater weight loss and BMI reduction than the other participants. The review cited several other studies — albeit small ones — in which weight loss was associated with improvements in sperm parameters, including one randomized controlled trial in which one group lost weight with liraglutide and the other with lifestyle modifications; both groups showed increases in the concentration and number of sperm.
One of the key questions requiring further research, then, is whether GLP-1 agents have direct effects on male fertility independent of a reduction in obesity. The randomized controlled trials comparing liraglutide and lifestyle modifications failed to find additional effects on semen in the men taking liraglutide; however, the study had only 56 participants, and results from liraglutide cannot be generalized to potential effects of semaglutide or tirzepatide, Dr. Sadeghi-Nejad said.
“Determining the relative contributions of weight loss versus direct drug actions on fertility outcomes remains challenging without robust data,” Dr. Ramasamy said. “While acknowledged that diet and physical activity positively impact fertility, confirming the synergistic role of GLP-1 receptor agonists requires evidence from well-designed randomized clinical trials.”
Rodent studies suggest that GLP-1 RAs may independently affect testicular function because GLP-1 receptors exist in Sertoli and Leydig cells of the testes. In one study, for example, obese mice who received the GLP-1 agonist exenatide for 8 weeks had “improved sperm motility, DNA integrity, and decreased expression of pro-inflammatory cytokines,” the authors of the review reported. But the precise mechanisms aren’t well understood.
“We know that there are GLP-1 receptors in the reproductive tract, but the extent of the downstream effect of stimulating those receptors, I don’t think we know well,” said John P. Lindsey II, MD, MEng, assistant professor of urology at University of California San Francisco Health.
Other hormonal effects of GLP-1 agonists, such as stimulating insulin production and better regulating blood glucose levels, are better understood, said Raevti Bole, MD, a urologist at Cleveland Clinic, in Ohio, but still other effects of the drugs may not yet be identified.
“I think the really big unknown is whether these types of drugs have effects that are not hormonal on male fertility and what those effects are, and how those affect sperm,” Dr. Bole said. “For example, we know that these drugs slow gastric emptying. Is it possible that slow gastric emptying affects some of the nutrients that you absorb, and that could affect fertility?” Similarly, she said, it’s not clear whether GLP-1 agonists would have any effects on the thyroid that could then affect fertility.
Effects on Offspring
Another open question about GLP-1 RAs and male fertility is their potential effects on the offspring, said Sriram Machineni, MBBS, associate professor of endocrinology at the Albert Einstein College of Medicine in New York City. The clinical trials involving the drugs for treating type 2 diabetes and obesity required both men and women to use contraception. If sperm contributing to a pregnancy are exposed to a GLP-1 agent, “we don’t know what the consequences could be,” Dr. Machineni said. “Just increasing the fertility of the man is not enough. We need to make sure it’s safe long-term for the fetus.”
Dr. Bole also pointed out the need for understanding potential effects in the fetus.
“We know that there are epigenetic changes that can happen to sperm that are influenced by the lifestyle and the physical health and environment of the parent,” Dr. Bole said. “So how could these drugs potentially affect those epigenetic changes that then potentially are passed on to the offspring? We don’t know that.”
An ideal source for that data would be a cohort registry of people who are taking the medication and then cause a pregnancy. “They have a registry for pregnant women,” Dr. Machineni said, “but we need something similar for men.”
Dr. Sadeghi-Nejad said that he and his coauthors are working on developing a registry for men who take GLP-1 RAs that would enable long-term tracking of multiple andrologic outcomes, including fertility and sexual dysfunction. Such a registry could theoretically be useful in tracking pregnancy and offspring outcomes as well.
Too Soon for Prescribing
Additional options for treating fertility in men with obesity would be welcome. Current treatments include the selective estrogen receptor modulator (SERM) clomiphene citrate and the aromatase inhibitor anastrozole. But these have their drawbacks, Dr. Sadeghi-Nejad pointed out; in the overweight population in particular, they “are not necessarily ideal,” he said.
“Although both are viable treatments for enhancing hormonal balance and semen parameters, clomiphene citrate has rare but documented side effects, including thromboembolism, gastrointestinal distress and occasional weight gain in men,” Dr. Sadeghi-Nejad and his colleagues wrote. “Furthermore, despite clomiphene citrate’s association with significant increases in sperm concentration, it is not universally effective, with a meta-analysis indicating a significant increase in sperm concentration in approximately 60% of men.”
For men who have obesity and oligospermia but normal levels of testosterone and estradiol, “conventional pharmaceutical approaches like clomiphene may not be suitable,” the authors wrote.
Still, GLP-1 RAs may have a role to play for this population.
“I think it is within the wheelhouse of a reproductive urologist to consider those types of medications,” Dr. Lindsey said. For example, for a patient who has overweight or obesity, “does it make sense to think about doing clomiphene therapy, which we often do for someone who has low testosterone, in conjunction [with a GLP-1 agonist]? Maybe there’s a kind of an additive effect of having both on board.”
Dr. Ramasamy similarly noted that GLP-1 agonists cannot replace SERMs but may work “synergistically” with them.
“Despite the established popularity of GLP-1 receptor agonists, there may be some reluctance among urologists and fertility specialists to prescribe them, with some others advocating for their use to enhance semen parameters,” Dr. Ramasamy said. “However, robust scientific evidence is still lacking, necessitating caution and a wait for more substantial data.”
Even if GLP-1 RAs prove to have therapeutic benefit for fertility, considerations such as availability and cost may affect prescribing.
“We do currently have safe and effective drugs that we use for male fertility, and those are generally nowhere near as expensive,” Dr. Bole said. “When we start talking about another drug that we can add, we have to think about the efficacy and the potential side effect but also, is this affordable for patients?”
Eventually, once more evidence become available, all of the urologists who spoke with this news organization said that they expect discussion about the possible therapeutic utility of GLP-1 agonists to make its way into clinical guidelines.
“Obesity is such a huge impediment for fertility in the modern environment,” Dr. Machineni said. “We will have to clarify the use of these agents, so I think this will be a part of the guidelines some point, but I think we need more information.”
The research was funded by the National Institute of Diabetes and Digestive and Kidney Diseases and the American Cancer Society. The review authors and other quoted physicians reported no disclosures. Dr. Machineni has consulted for Novo Nordisk and Lilly and has conducted clinical trials with semaglutide and tirzepatide for those companies.
A version of this article appeared on Medscape.com.