Clinical Psychiatry News

Men with hypersexual disorder showed higher levels of oxytocin in their blood than did healthy control men without the disorder, in a study with 102 participants.

Hypersexual disorder (HD) is characterized by “excessive and persistent sexual behaviors in relation to various mood states, with an impulsivity component and experienced loss of control,” John Flanagan, MD, of the Karolinska Institutet in Stockholm and colleagues wrote. Although HD is not included as a separate diagnosis in the current DSM, the similar disorder of compulsive sexual behavior is included in the ICD.

Data on the pathophysiology of HD are limited, although a previous study by corresponding author Andreas Chatzittofis, MD, and colleagues showed evidence of neuroendocrine dysregulation in men with HD, and prompted the current study to explore the possible involvement of the oxytocinergic system in HD.

In the current study, published in the Journal of Clinical Endocrinology & Metabolism, the researchers identified 64 men with HD and 38 healthy male controls. The patients were help-seeking men older than 18 years diagnosed with HD who presented to a single center in Sweden during 2013-2014. The men were included in a randomized clinical trial of cognitive-behavioral therapy for HD, and 30 of them participated in a 7-week CBT program.

Oxytocin, secreted by the pituitary gland, is known to play a role in sexual behavior, but has not been examined in HD men, the researchers said. At baseline, the mean plasma oxytocin was 31.0 pM in the HD patients, which was significantly higher than the mean 16.9 pM in healthy controls (P < .001). However, the 30 HD men who underwent CBT showed significant improvement in oxytocin levels, from a mean pretreatment level of 30.5 to a mean posttreatment level of 20.2 pM (P = .0000019).

The study findings were limited by several factors, including the lack of data on oxytocin for a wait list or control group, as well as the inability to control for confounding factors such as diet, physical activity, ethnicity, and stress, and a lack of data on sexual activity prior to oxytocin measurements, the researchers noted.

However, “although there is no clear consensus at this point, previous studies support the use of oxytocin plasma levels as a surrogate variable for [cerebrospinal fluid] oxytocin activity,” the researchers wrote in their discussion. The current study findings support the potential of oxytocin as a biomarker for HD diagnostics and also as a measure of disease severity. Larger studies to confirm the findings, especially those that exclude potential confounders, would be valuable.

Oxytocin may be treatment target

The study is important because of the lack of knowledge regarding the pathophysiology underlying hypersexual disorder, Dr. Chatzittofis of the University of Cyprus, Nicosia, said in an interview. “This is the first study to indicate a role for oxytocin’s involvement” in hypersexual disorder in men. Dr. Chatzittofis led a team in a previous study that showed an association between HD in men and dysregulation of the hypothalamic pituitary adrenal axis.

In the current study, “we discovered that men with compulsive sexual behavior disorder had higher oxytocin levels, compared with healthy men,” said Dr. Chatzittofis, adding that the take-home message for clinicians is the potential of CBT for treatment. “Cognitive-behavior therapy led to a reduction in both hypersexual behavior and oxytocin levels.” The results suggest that oxytocin plays an important role in sex addiction.

Consequently, oxytocin may be a potential drug target for future pharmacologic treatment of hypersexual disorder, he added.

The study was supported by the Swedish Research Council, the Stockholm County Council, and by a partnership between Umeå University and Västerbotten County Council. The researchers had no financial conflicts to disclose.

Men with hypersexual disorder showed higher levels of oxytocin in their blood than did healthy control men without the disorder, in a study with 102 participants.

Hypersexual disorder (HD) is characterized by “excessive and persistent sexual behaviors in relation to various mood states, with an impulsivity component and experienced loss of control,” John Flanagan, MD, of the Karolinska Institutet in Stockholm and colleagues wrote. Although HD is not included as a separate diagnosis in the current DSM, the similar disorder of compulsive sexual behavior is included in the ICD.

Data on the pathophysiology of HD are limited, although a previous study by corresponding author Andreas Chatzittofis, MD, and colleagues showed evidence of neuroendocrine dysregulation in men with HD, and prompted the current study to explore the possible involvement of the oxytocinergic system in HD.

In the current study, published in the Journal of Clinical Endocrinology & Metabolism, the researchers identified 64 men with HD and 38 healthy male controls. The patients were help-seeking men older than 18 years diagnosed with HD who presented to a single center in Sweden during 2013-2014. The men were included in a randomized clinical trial of cognitive-behavioral therapy for HD, and 30 of them participated in a 7-week CBT program.

Oxytocin, secreted by the pituitary gland, is known to play a role in sexual behavior, but has not been examined in HD men, the researchers said. At baseline, the mean plasma oxytocin was 31.0 pM in the HD patients, which was significantly higher than the mean 16.9 pM in healthy controls (P < .001). However, the 30 HD men who underwent CBT showed significant improvement in oxytocin levels, from a mean pretreatment level of 30.5 to a mean posttreatment level of 20.2 pM (P = .0000019).

The study findings were limited by several factors, including the lack of data on oxytocin for a wait list or control group, as well as the inability to control for confounding factors such as diet, physical activity, ethnicity, and stress, and a lack of data on sexual activity prior to oxytocin measurements, the researchers noted.

However, “although there is no clear consensus at this point, previous studies support the use of oxytocin plasma levels as a surrogate variable for [cerebrospinal fluid] oxytocin activity,” the researchers wrote in their discussion. The current study findings support the potential of oxytocin as a biomarker for HD diagnostics and also as a measure of disease severity. Larger studies to confirm the findings, especially those that exclude potential confounders, would be valuable.

Oxytocin may be treatment target

The study is important because of the lack of knowledge regarding the pathophysiology underlying hypersexual disorder, Dr. Chatzittofis of the University of Cyprus, Nicosia, said in an interview. “This is the first study to indicate a role for oxytocin’s involvement” in hypersexual disorder in men. Dr. Chatzittofis led a team in a previous study that showed an association between HD in men and dysregulation of the hypothalamic pituitary adrenal axis.

In the current study, “we discovered that men with compulsive sexual behavior disorder had higher oxytocin levels, compared with healthy men,” said Dr. Chatzittofis, adding that the take-home message for clinicians is the potential of CBT for treatment. “Cognitive-behavior therapy led to a reduction in both hypersexual behavior and oxytocin levels.” The results suggest that oxytocin plays an important role in sex addiction.

Consequently, oxytocin may be a potential drug target for future pharmacologic treatment of hypersexual disorder, he added.

The study was supported by the Swedish Research Council, the Stockholm County Council, and by a partnership between Umeå University and Västerbotten County Council. The researchers had no financial conflicts to disclose.

Men with hypersexual disorder showed higher levels of oxytocin in their blood than did healthy control men without the disorder, in a study with 102 participants.

Hypersexual disorder (HD) is characterized by “excessive and persistent sexual behaviors in relation to various mood states, with an impulsivity component and experienced loss of control,” John Flanagan, MD, of the Karolinska Institutet in Stockholm and colleagues wrote. Although HD is not included as a separate diagnosis in the current DSM, the similar disorder of compulsive sexual behavior is included in the ICD.

Data on the pathophysiology of HD are limited, although a previous study by corresponding author Andreas Chatzittofis, MD, and colleagues showed evidence of neuroendocrine dysregulation in men with HD, and prompted the current study to explore the possible involvement of the oxytocinergic system in HD.

In the current study, published in the Journal of Clinical Endocrinology & Metabolism, the researchers identified 64 men with HD and 38 healthy male controls. The patients were help-seeking men older than 18 years diagnosed with HD who presented to a single center in Sweden during 2013-2014. The men were included in a randomized clinical trial of cognitive-behavioral therapy for HD, and 30 of them participated in a 7-week CBT program.

Oxytocin, secreted by the pituitary gland, is known to play a role in sexual behavior, but has not been examined in HD men, the researchers said. At baseline, the mean plasma oxytocin was 31.0 pM in the HD patients, which was significantly higher than the mean 16.9 pM in healthy controls (P < .001). However, the 30 HD men who underwent CBT showed significant improvement in oxytocin levels, from a mean pretreatment level of 30.5 to a mean posttreatment level of 20.2 pM (P = .0000019).

The study findings were limited by several factors, including the lack of data on oxytocin for a wait list or control group, as well as the inability to control for confounding factors such as diet, physical activity, ethnicity, and stress, and a lack of data on sexual activity prior to oxytocin measurements, the researchers noted.

However, “although there is no clear consensus at this point, previous studies support the use of oxytocin plasma levels as a surrogate variable for [cerebrospinal fluid] oxytocin activity,” the researchers wrote in their discussion. The current study findings support the potential of oxytocin as a biomarker for HD diagnostics and also as a measure of disease severity. Larger studies to confirm the findings, especially those that exclude potential confounders, would be valuable.

Oxytocin may be treatment target

The study is important because of the lack of knowledge regarding the pathophysiology underlying hypersexual disorder, Dr. Chatzittofis of the University of Cyprus, Nicosia, said in an interview. “This is the first study to indicate a role for oxytocin’s involvement” in hypersexual disorder in men. Dr. Chatzittofis led a team in a previous study that showed an association between HD in men and dysregulation of the hypothalamic pituitary adrenal axis.

In the current study, “we discovered that men with compulsive sexual behavior disorder had higher oxytocin levels, compared with healthy men,” said Dr. Chatzittofis, adding that the take-home message for clinicians is the potential of CBT for treatment. “Cognitive-behavior therapy led to a reduction in both hypersexual behavior and oxytocin levels.” The results suggest that oxytocin plays an important role in sex addiction.

Consequently, oxytocin may be a potential drug target for future pharmacologic treatment of hypersexual disorder, he added.

The study was supported by the Swedish Research Council, the Stockholm County Council, and by a partnership between Umeå University and Västerbotten County Council. The researchers had no financial conflicts to disclose.

The use of over-the-counter melatonin supplements grew by fivefold over the past 2 decades in the United States, a new study finds, although only 2% of a recent group of survey respondents said they had taken the sleep aid within the past month.

The findings, reported Feb. 1 in a research letter in the Journal of the American Medical Association, suggest that “millions of U.S. individuals are using melatonin,” study coauthor Naima Covassin, PhD, an associate consultant at Mayo Clinic in Rochester, Minn., told this news organization. “It is important to ask patients who report sleep problems whether they consume melatonin supplements, and these findings should certainly prompt more research in this area.”

The supplements boost the levels of melatonin, a hormone that is linked to the sleep-wake cycle. “Melatonin facilitates our ability to fall asleep at our bedtime by decreasing the natural early evening circadian arousal that helps keep us alert despite our having been awake since the morning,” said David N. Neubauer, MD, a sleep specialist at Johns Hopkins University, Baltimore. “It isn’t so much that melatonin is sedating, but rather that it turns off arousal.”

For the new study, researchers tracked data from the National Health and Nutrition Examination Survey from 1999-2000 to 2017-2018 and focused on respondents aged 20 and older (n = 55,021, mean age, 47.5, 52% women). As the researchers noted, response rates dipped mightily from a high of 84% in 2001-2002 to just 51.9% in 2017-2018.

The study found that the overall reported weighted prevalence of melatonin use grew from 0.4% (95% confidence interval, 0.2%-1.0%) in 1999-2000 to 2.1% (95% CI, 1.5%-2.9%) in 2017-2018 (linear P = .004). In 93.9% of cases of reported melatonin use, the surveyors confirmed it by checking for supplement bottles.

“These trends were similar in men and women and across age groups,” Dr. Covassin said. “We also found that use of more than 5 mg/day melatonin was not reported till 2005-2006, and it has been increasing since.”

Melatonin supplements are now available in tablets, capsules, gummies, powders, liquids, sprays, and other formulations. Users can even buy CBD-melatonin combos.

The survey doesn’t explore why the respondents used melatonin nor whether they thought it actually helped them. “The study was designed to evaluate the breadth of use of melatonin, rather than its effectiveness as a sleep aid,” Dr. Covassin said.

Dr. Neubauer, who wasn’t associated with the study, said the research seems valid. According to him, melatonin use has likely grown because of marketing and a higher number of products. He added that melatonin products are being manufactured at higher doses, although melatonin has a flat dose-response curve. “Higher doses typically do not have a greater effect,” he said.

According to Dr. Covassin, melatonin is generally considered to be safe, although side effects such as fatigue, dizziness, and headaches have been reported in clinical trials. “This is especially evident when high doses are administered,” Dr. Covassin said. “Other potentially more harmful consequences have also been noted. For instance, it has been found that acute administration of melatonin may decrease glucose tolerance, which may be especially problematic in patients with preexisting vulnerabilities such in those with diabetes. There are also very limited data on whether sustained use is safe in the long run.”

Moving forward, Dr. Covassin said, “we are interested in better understanding consumption of melatonin supplements across different populations as well as the impact of chronic use.”

The study authors are supported by grants from the National Natural Science Foundation of China, National Institutes of Health, Sleep Number Corporation (to Mayo Clinic), the Alice Sheets Marriott Professorship, and the Mayo Clinic Marie Ingalls Research Career Development Award.

Dr. Covassin and Dr. Neubauer have disclosed no relevant financial relationships. Study coauthor Virend K. Somers, MD, PhD, reports having served as a consultant for Respicardia, Baker Tilly, Bayer, and Jazz Pharmaceuticals and serving on the Sleep Number Research Advisory Board.

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

The use of over-the-counter melatonin supplements grew by fivefold over the past 2 decades in the United States, a new study finds, although only 2% of a recent group of survey respondents said they had taken the sleep aid within the past month.

The findings, reported Feb. 1 in a research letter in the Journal of the American Medical Association, suggest that “millions of U.S. individuals are using melatonin,” study coauthor Naima Covassin, PhD, an associate consultant at Mayo Clinic in Rochester, Minn., told this news organization. “It is important to ask patients who report sleep problems whether they consume melatonin supplements, and these findings should certainly prompt more research in this area.”

The supplements boost the levels of melatonin, a hormone that is linked to the sleep-wake cycle. “Melatonin facilitates our ability to fall asleep at our bedtime by decreasing the natural early evening circadian arousal that helps keep us alert despite our having been awake since the morning,” said David N. Neubauer, MD, a sleep specialist at Johns Hopkins University, Baltimore. “It isn’t so much that melatonin is sedating, but rather that it turns off arousal.”

For the new study, researchers tracked data from the National Health and Nutrition Examination Survey from 1999-2000 to 2017-2018 and focused on respondents aged 20 and older (n = 55,021, mean age, 47.5, 52% women). As the researchers noted, response rates dipped mightily from a high of 84% in 2001-2002 to just 51.9% in 2017-2018.

The study found that the overall reported weighted prevalence of melatonin use grew from 0.4% (95% confidence interval, 0.2%-1.0%) in 1999-2000 to 2.1% (95% CI, 1.5%-2.9%) in 2017-2018 (linear P = .004). In 93.9% of cases of reported melatonin use, the surveyors confirmed it by checking for supplement bottles.

“These trends were similar in men and women and across age groups,” Dr. Covassin said. “We also found that use of more than 5 mg/day melatonin was not reported till 2005-2006, and it has been increasing since.”

Melatonin supplements are now available in tablets, capsules, gummies, powders, liquids, sprays, and other formulations. Users can even buy CBD-melatonin combos.

The survey doesn’t explore why the respondents used melatonin nor whether they thought it actually helped them. “The study was designed to evaluate the breadth of use of melatonin, rather than its effectiveness as a sleep aid,” Dr. Covassin said.

Dr. Neubauer, who wasn’t associated with the study, said the research seems valid. According to him, melatonin use has likely grown because of marketing and a higher number of products. He added that melatonin products are being manufactured at higher doses, although melatonin has a flat dose-response curve. “Higher doses typically do not have a greater effect,” he said.

According to Dr. Covassin, melatonin is generally considered to be safe, although side effects such as fatigue, dizziness, and headaches have been reported in clinical trials. “This is especially evident when high doses are administered,” Dr. Covassin said. “Other potentially more harmful consequences have also been noted. For instance, it has been found that acute administration of melatonin may decrease glucose tolerance, which may be especially problematic in patients with preexisting vulnerabilities such in those with diabetes. There are also very limited data on whether sustained use is safe in the long run.”

Moving forward, Dr. Covassin said, “we are interested in better understanding consumption of melatonin supplements across different populations as well as the impact of chronic use.”

The study authors are supported by grants from the National Natural Science Foundation of China, National Institutes of Health, Sleep Number Corporation (to Mayo Clinic), the Alice Sheets Marriott Professorship, and the Mayo Clinic Marie Ingalls Research Career Development Award.

Dr. Covassin and Dr. Neubauer have disclosed no relevant financial relationships. Study coauthor Virend K. Somers, MD, PhD, reports having served as a consultant for Respicardia, Baker Tilly, Bayer, and Jazz Pharmaceuticals and serving on the Sleep Number Research Advisory Board.

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

The use of over-the-counter melatonin supplements grew by fivefold over the past 2 decades in the United States, a new study finds, although only 2% of a recent group of survey respondents said they had taken the sleep aid within the past month.

The findings, reported Feb. 1 in a research letter in the Journal of the American Medical Association, suggest that “millions of U.S. individuals are using melatonin,” study coauthor Naima Covassin, PhD, an associate consultant at Mayo Clinic in Rochester, Minn., told this news organization. “It is important to ask patients who report sleep problems whether they consume melatonin supplements, and these findings should certainly prompt more research in this area.”

The supplements boost the levels of melatonin, a hormone that is linked to the sleep-wake cycle. “Melatonin facilitates our ability to fall asleep at our bedtime by decreasing the natural early evening circadian arousal that helps keep us alert despite our having been awake since the morning,” said David N. Neubauer, MD, a sleep specialist at Johns Hopkins University, Baltimore. “It isn’t so much that melatonin is sedating, but rather that it turns off arousal.”

For the new study, researchers tracked data from the National Health and Nutrition Examination Survey from 1999-2000 to 2017-2018 and focused on respondents aged 20 and older (n = 55,021, mean age, 47.5, 52% women). As the researchers noted, response rates dipped mightily from a high of 84% in 2001-2002 to just 51.9% in 2017-2018.

The study found that the overall reported weighted prevalence of melatonin use grew from 0.4% (95% confidence interval, 0.2%-1.0%) in 1999-2000 to 2.1% (95% CI, 1.5%-2.9%) in 2017-2018 (linear P = .004). In 93.9% of cases of reported melatonin use, the surveyors confirmed it by checking for supplement bottles.

“These trends were similar in men and women and across age groups,” Dr. Covassin said. “We also found that use of more than 5 mg/day melatonin was not reported till 2005-2006, and it has been increasing since.”

Melatonin supplements are now available in tablets, capsules, gummies, powders, liquids, sprays, and other formulations. Users can even buy CBD-melatonin combos.

The survey doesn’t explore why the respondents used melatonin nor whether they thought it actually helped them. “The study was designed to evaluate the breadth of use of melatonin, rather than its effectiveness as a sleep aid,” Dr. Covassin said.

Dr. Neubauer, who wasn’t associated with the study, said the research seems valid. According to him, melatonin use has likely grown because of marketing and a higher number of products. He added that melatonin products are being manufactured at higher doses, although melatonin has a flat dose-response curve. “Higher doses typically do not have a greater effect,” he said.

According to Dr. Covassin, melatonin is generally considered to be safe, although side effects such as fatigue, dizziness, and headaches have been reported in clinical trials. “This is especially evident when high doses are administered,” Dr. Covassin said. “Other potentially more harmful consequences have also been noted. For instance, it has been found that acute administration of melatonin may decrease glucose tolerance, which may be especially problematic in patients with preexisting vulnerabilities such in those with diabetes. There are also very limited data on whether sustained use is safe in the long run.”

Moving forward, Dr. Covassin said, “we are interested in better understanding consumption of melatonin supplements across different populations as well as the impact of chronic use.”

The study authors are supported by grants from the National Natural Science Foundation of China, National Institutes of Health, Sleep Number Corporation (to Mayo Clinic), the Alice Sheets Marriott Professorship, and the Mayo Clinic Marie Ingalls Research Career Development Award.

Dr. Covassin and Dr. Neubauer have disclosed no relevant financial relationships. Study coauthor Virend K. Somers, MD, PhD, reports having served as a consultant for Respicardia, Baker Tilly, Bayer, and Jazz Pharmaceuticals and serving on the Sleep Number Research Advisory Board.

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

It all started with genetic data. A gene here, a gene there. Eventually the story became clearer: If scientists are to one day find a cure for Alzheimer’s disease, they should look to the immune system.

Over the past couple decades, researchers have identified numerous genes involved in various immune system functions that may also contribute to Alzheimer’s disease. Some of the prime suspects are genes that control microglia, now the focus of intense research in developing new Alzheimer’s drugs.

Microglia are amoeba-like cells that scour the brain for injuries and invaders. They help clear dead or impaired brain cells and literally gobble up invading microbes. Without them, we’d be in trouble.

In a normal brain, a protein called beta-amyloid is cleared away through our lymphatic system by microglia as molecular junk. But sometimes it builds up. Certain gene mutations are one culprit in this toxic accumulation. Traumatic brain injury is another, and, perhaps, impaired microglial function.

One thing everyone agrees on is that in people with Alzheimer’s disease, too much amyloid accumulates between their brain cells and in the vessels that supply the brain with blood. Once amyloid begins to clog networks of neurons, it triggers the accumulation of another protein, called tau, inside of these brain cells. The presence of tau sends microglia and other immune mechanisms into overdrive, resulting in the inflammatory immune response that many experts believe ultimately saps brain vitality in Alzheimer’s disease.
 

The gene scene

To date, nearly a dozen genes involved in immune and microglial function have been tied to Alzheimer’s disease. The first was CD33, identified in 2008.

“When we got the results, I literally ran to my colleague’s office next door and said, you gotta see this!” said Harvard neuroscientist Rudolph Tanzi. Dr. Tanzi, who goes by Rudy, led the CD33 research. The discovery was quickly named a top medical breakthrough of 2008 by Time magazine.

“We were laughing because what they didn’t know is we had no idea what this gene did,” he joked. But over time, research by Dr. Tanzi and his group revealed that CD33 is a kind of microglial on-off switch, activating the cells as part of an inflammatory pathway.

“We kind of got it all going when it came to the genetics,” he said.

Microglia normally recognize molecular patterns associated with microbes and cellular damage as unwanted. This is how they know to take action – to devour unfamiliar pathogens and dead tissue. Dr. Tanzi believes microglia sense any sign of brain damage as an infection, which causes them to become hyperactive.

Much of our modern human immune system, he explained, evolved many hundreds of thousands of years ago. Our lifespans at the time were far shorter than they are today, and the majority of people didn’t live long enough to develop dementia or the withered brain cells that come with it. So our immune system, he said, assumes any faulty brain tissue is due to a microbe, not dementia. Microglia react aggressively, clearing the area to prevent the spread of infection.

“They say, ‘We better wipe out this part of the brain that’s infected, even if it’s not.’ They don’t know,” quipped Dr. Tanzi. “That’s what causes neuroinflammation. And CD33 turns this response on. The microglia become killers, not just janitors.”
 

A brake on overactive microglia

If CD33 is the yin, a gene called TREM2 is the yang. Discovered a few years after CD33, TREM2 reins in microglial activation, returning them to their role as cellular housekeepers.

Neurologist David Holtzman, MD, of Washington University in St. Louis, who studies TREM2, agrees that wherever you find amyloid, tau, or dead brain cells, there are microglia raring to go and ready to scavenge.

“I think at first a lot of people thought these cells were reacting to Alzheimer’s pathology, and not necessarily a cause of the disease,” he said.

It was the discovery of TREM2 on the heels of CD33 that really shifted the thinking, in part because it produces a protein that in the brain is only found in microglia. “Many of us [in the field] immediately said, ‘Look, there’s now a risk factor that is only expressed in microglia. It must be that innate immune cells are important in some way in the pathogenesis of the disease,’ “ he added.

Dr. Holtzman sees microglial activation in impending dementia as a double-edged sword. In the beginning, microglia clear unwanted amyloid to maintain brain health. But once accumulated amyloid and tau have done enough damage, the neuroinflammation that comes with microglial activation does more harm than good. Neurons die en masse and dementia sets in.

But not all researchers are convinced.

Serge Revist, PhD, is a professor in the department of molecular medicine at the Laval University Medical School in Quebec. Based on his lab’s research, he believes that while impaired immune activity is involved in Alzheimer’s disease, it is not the root cause. “I don’t think it is the immune cells that do the damage, I still think it is the beta-amyloid itself,” he said, “In my lab, in mouse studies, we’ve never found that immune cells were directly responsible for killing neurons.”

He does believe that in some patients with Alzheimer’s disease, microglia may not be able to handle the excess amyloid that accumulates in the disease and that developing treatments that improve the ability of microglia and the immune system to clear the protein could be effective.
 

Microglial medicines

The biological cascade leading to Alzheimer’s disease is a tangled one. Gene variants influencing the accumulation and clearance of amyloid are likely a major contributor. But immune activity caused by early life infection might also be involved, at least in some cases. This infectious theory of Alzheimer’s disease was first proposed by Dr. Tanzi’s now-deceased colleague Robert Moir, PhD. Dr. Tanzi’s group even has evidence that amyloid itself is antimicrobial and evolved to protect us from pathogens, only to become a problem when overactive and aggregated.

And the same goes for microglia, cells whose over-ambition might cause much of the brain degeneration seen in Alzheimer’s disease.

In theory, if a treatment could decrease CD33 activity or increase that of TREM2, doctors might one day may be able to slow or even stop the progression of dementia. Instead of going after amyloid itself – the mechanism behind so many failed investigational Alzheimer’s drugs – a therapy that quells the immune response to amyloid might be the answer in treating dementia.

“There are a number of scientists and companies trying to figure out how to influence genes like TREM2 and CD33 and to both decrease amyloid and act on the downstream consequences of the protein,” said Dr. Holtzman. “All of this is to say that somewhere in the biology that causes Alzheimer’s disease, the immune system is involved.”

It seems that in many cases, the most common form of a dementia might be due to a well-intentioned immune cell going rogue. “I think you’d hear this from basically any researcher worth their salt,” said Dr. Tanzi. “I feel strongly that without microglial activation, you will not get Alzheimer’s disease.”

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

It all started with genetic data. A gene here, a gene there. Eventually the story became clearer: If scientists are to one day find a cure for Alzheimer’s disease, they should look to the immune system.

Over the past couple decades, researchers have identified numerous genes involved in various immune system functions that may also contribute to Alzheimer’s disease. Some of the prime suspects are genes that control microglia, now the focus of intense research in developing new Alzheimer’s drugs.

Microglia are amoeba-like cells that scour the brain for injuries and invaders. They help clear dead or impaired brain cells and literally gobble up invading microbes. Without them, we’d be in trouble.

In a normal brain, a protein called beta-amyloid is cleared away through our lymphatic system by microglia as molecular junk. But sometimes it builds up. Certain gene mutations are one culprit in this toxic accumulation. Traumatic brain injury is another, and, perhaps, impaired microglial function.

One thing everyone agrees on is that in people with Alzheimer’s disease, too much amyloid accumulates between their brain cells and in the vessels that supply the brain with blood. Once amyloid begins to clog networks of neurons, it triggers the accumulation of another protein, called tau, inside of these brain cells. The presence of tau sends microglia and other immune mechanisms into overdrive, resulting in the inflammatory immune response that many experts believe ultimately saps brain vitality in Alzheimer’s disease.
 

The gene scene

To date, nearly a dozen genes involved in immune and microglial function have been tied to Alzheimer’s disease. The first was CD33, identified in 2008.

“When we got the results, I literally ran to my colleague’s office next door and said, you gotta see this!” said Harvard neuroscientist Rudolph Tanzi. Dr. Tanzi, who goes by Rudy, led the CD33 research. The discovery was quickly named a top medical breakthrough of 2008 by Time magazine.

“We were laughing because what they didn’t know is we had no idea what this gene did,” he joked. But over time, research by Dr. Tanzi and his group revealed that CD33 is a kind of microglial on-off switch, activating the cells as part of an inflammatory pathway.

“We kind of got it all going when it came to the genetics,” he said.

Microglia normally recognize molecular patterns associated with microbes and cellular damage as unwanted. This is how they know to take action – to devour unfamiliar pathogens and dead tissue. Dr. Tanzi believes microglia sense any sign of brain damage as an infection, which causes them to become hyperactive.

Much of our modern human immune system, he explained, evolved many hundreds of thousands of years ago. Our lifespans at the time were far shorter than they are today, and the majority of people didn’t live long enough to develop dementia or the withered brain cells that come with it. So our immune system, he said, assumes any faulty brain tissue is due to a microbe, not dementia. Microglia react aggressively, clearing the area to prevent the spread of infection.

“They say, ‘We better wipe out this part of the brain that’s infected, even if it’s not.’ They don’t know,” quipped Dr. Tanzi. “That’s what causes neuroinflammation. And CD33 turns this response on. The microglia become killers, not just janitors.”
 

A brake on overactive microglia

If CD33 is the yin, a gene called TREM2 is the yang. Discovered a few years after CD33, TREM2 reins in microglial activation, returning them to their role as cellular housekeepers.

Neurologist David Holtzman, MD, of Washington University in St. Louis, who studies TREM2, agrees that wherever you find amyloid, tau, or dead brain cells, there are microglia raring to go and ready to scavenge.

“I think at first a lot of people thought these cells were reacting to Alzheimer’s pathology, and not necessarily a cause of the disease,” he said.

It was the discovery of TREM2 on the heels of CD33 that really shifted the thinking, in part because it produces a protein that in the brain is only found in microglia. “Many of us [in the field] immediately said, ‘Look, there’s now a risk factor that is only expressed in microglia. It must be that innate immune cells are important in some way in the pathogenesis of the disease,’ “ he added.

Dr. Holtzman sees microglial activation in impending dementia as a double-edged sword. In the beginning, microglia clear unwanted amyloid to maintain brain health. But once accumulated amyloid and tau have done enough damage, the neuroinflammation that comes with microglial activation does more harm than good. Neurons die en masse and dementia sets in.

But not all researchers are convinced.

Serge Revist, PhD, is a professor in the department of molecular medicine at the Laval University Medical School in Quebec. Based on his lab’s research, he believes that while impaired immune activity is involved in Alzheimer’s disease, it is not the root cause. “I don’t think it is the immune cells that do the damage, I still think it is the beta-amyloid itself,” he said, “In my lab, in mouse studies, we’ve never found that immune cells were directly responsible for killing neurons.”

He does believe that in some patients with Alzheimer’s disease, microglia may not be able to handle the excess amyloid that accumulates in the disease and that developing treatments that improve the ability of microglia and the immune system to clear the protein could be effective.
 

Microglial medicines

The biological cascade leading to Alzheimer’s disease is a tangled one. Gene variants influencing the accumulation and clearance of amyloid are likely a major contributor. But immune activity caused by early life infection might also be involved, at least in some cases. This infectious theory of Alzheimer’s disease was first proposed by Dr. Tanzi’s now-deceased colleague Robert Moir, PhD. Dr. Tanzi’s group even has evidence that amyloid itself is antimicrobial and evolved to protect us from pathogens, only to become a problem when overactive and aggregated.

And the same goes for microglia, cells whose over-ambition might cause much of the brain degeneration seen in Alzheimer’s disease.

In theory, if a treatment could decrease CD33 activity or increase that of TREM2, doctors might one day may be able to slow or even stop the progression of dementia. Instead of going after amyloid itself – the mechanism behind so many failed investigational Alzheimer’s drugs – a therapy that quells the immune response to amyloid might be the answer in treating dementia.

“There are a number of scientists and companies trying to figure out how to influence genes like TREM2 and CD33 and to both decrease amyloid and act on the downstream consequences of the protein,” said Dr. Holtzman. “All of this is to say that somewhere in the biology that causes Alzheimer’s disease, the immune system is involved.”

It seems that in many cases, the most common form of a dementia might be due to a well-intentioned immune cell going rogue. “I think you’d hear this from basically any researcher worth their salt,” said Dr. Tanzi. “I feel strongly that without microglial activation, you will not get Alzheimer’s disease.”

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

It all started with genetic data. A gene here, a gene there. Eventually the story became clearer: If scientists are to one day find a cure for Alzheimer’s disease, they should look to the immune system.

Over the past couple decades, researchers have identified numerous genes involved in various immune system functions that may also contribute to Alzheimer’s disease. Some of the prime suspects are genes that control microglia, now the focus of intense research in developing new Alzheimer’s drugs.

Microglia are amoeba-like cells that scour the brain for injuries and invaders. They help clear dead or impaired brain cells and literally gobble up invading microbes. Without them, we’d be in trouble.

In a normal brain, a protein called beta-amyloid is cleared away through our lymphatic system by microglia as molecular junk. But sometimes it builds up. Certain gene mutations are one culprit in this toxic accumulation. Traumatic brain injury is another, and, perhaps, impaired microglial function.

One thing everyone agrees on is that in people with Alzheimer’s disease, too much amyloid accumulates between their brain cells and in the vessels that supply the brain with blood. Once amyloid begins to clog networks of neurons, it triggers the accumulation of another protein, called tau, inside of these brain cells. The presence of tau sends microglia and other immune mechanisms into overdrive, resulting in the inflammatory immune response that many experts believe ultimately saps brain vitality in Alzheimer’s disease.
 

The gene scene

To date, nearly a dozen genes involved in immune and microglial function have been tied to Alzheimer’s disease. The first was CD33, identified in 2008.

“When we got the results, I literally ran to my colleague’s office next door and said, you gotta see this!” said Harvard neuroscientist Rudolph Tanzi. Dr. Tanzi, who goes by Rudy, led the CD33 research. The discovery was quickly named a top medical breakthrough of 2008 by Time magazine.

“We were laughing because what they didn’t know is we had no idea what this gene did,” he joked. But over time, research by Dr. Tanzi and his group revealed that CD33 is a kind of microglial on-off switch, activating the cells as part of an inflammatory pathway.

“We kind of got it all going when it came to the genetics,” he said.

Microglia normally recognize molecular patterns associated with microbes and cellular damage as unwanted. This is how they know to take action – to devour unfamiliar pathogens and dead tissue. Dr. Tanzi believes microglia sense any sign of brain damage as an infection, which causes them to become hyperactive.

Much of our modern human immune system, he explained, evolved many hundreds of thousands of years ago. Our lifespans at the time were far shorter than they are today, and the majority of people didn’t live long enough to develop dementia or the withered brain cells that come with it. So our immune system, he said, assumes any faulty brain tissue is due to a microbe, not dementia. Microglia react aggressively, clearing the area to prevent the spread of infection.

“They say, ‘We better wipe out this part of the brain that’s infected, even if it’s not.’ They don’t know,” quipped Dr. Tanzi. “That’s what causes neuroinflammation. And CD33 turns this response on. The microglia become killers, not just janitors.”
 

A brake on overactive microglia

If CD33 is the yin, a gene called TREM2 is the yang. Discovered a few years after CD33, TREM2 reins in microglial activation, returning them to their role as cellular housekeepers.

Neurologist David Holtzman, MD, of Washington University in St. Louis, who studies TREM2, agrees that wherever you find amyloid, tau, or dead brain cells, there are microglia raring to go and ready to scavenge.

“I think at first a lot of people thought these cells were reacting to Alzheimer’s pathology, and not necessarily a cause of the disease,” he said.

It was the discovery of TREM2 on the heels of CD33 that really shifted the thinking, in part because it produces a protein that in the brain is only found in microglia. “Many of us [in the field] immediately said, ‘Look, there’s now a risk factor that is only expressed in microglia. It must be that innate immune cells are important in some way in the pathogenesis of the disease,’ “ he added.

Dr. Holtzman sees microglial activation in impending dementia as a double-edged sword. In the beginning, microglia clear unwanted amyloid to maintain brain health. But once accumulated amyloid and tau have done enough damage, the neuroinflammation that comes with microglial activation does more harm than good. Neurons die en masse and dementia sets in.

But not all researchers are convinced.

Serge Revist, PhD, is a professor in the department of molecular medicine at the Laval University Medical School in Quebec. Based on his lab’s research, he believes that while impaired immune activity is involved in Alzheimer’s disease, it is not the root cause. “I don’t think it is the immune cells that do the damage, I still think it is the beta-amyloid itself,” he said, “In my lab, in mouse studies, we’ve never found that immune cells were directly responsible for killing neurons.”

He does believe that in some patients with Alzheimer’s disease, microglia may not be able to handle the excess amyloid that accumulates in the disease and that developing treatments that improve the ability of microglia and the immune system to clear the protein could be effective.
 

Microglial medicines

The biological cascade leading to Alzheimer’s disease is a tangled one. Gene variants influencing the accumulation and clearance of amyloid are likely a major contributor. But immune activity caused by early life infection might also be involved, at least in some cases. This infectious theory of Alzheimer’s disease was first proposed by Dr. Tanzi’s now-deceased colleague Robert Moir, PhD. Dr. Tanzi’s group even has evidence that amyloid itself is antimicrobial and evolved to protect us from pathogens, only to become a problem when overactive and aggregated.

And the same goes for microglia, cells whose over-ambition might cause much of the brain degeneration seen in Alzheimer’s disease.

In theory, if a treatment could decrease CD33 activity or increase that of TREM2, doctors might one day may be able to slow or even stop the progression of dementia. Instead of going after amyloid itself – the mechanism behind so many failed investigational Alzheimer’s drugs – a therapy that quells the immune response to amyloid might be the answer in treating dementia.

“There are a number of scientists and companies trying to figure out how to influence genes like TREM2 and CD33 and to both decrease amyloid and act on the downstream consequences of the protein,” said Dr. Holtzman. “All of this is to say that somewhere in the biology that causes Alzheimer’s disease, the immune system is involved.”

It seems that in many cases, the most common form of a dementia might be due to a well-intentioned immune cell going rogue. “I think you’d hear this from basically any researcher worth their salt,” said Dr. Tanzi. “I feel strongly that without microglial activation, you will not get Alzheimer’s disease.”

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

A commonly held belief that classic psychedelic therapy can trigger suicidal thoughts, actions, or other types of self-harm is not supported by research, and, in fact, the opposite may be true.

Results from a meta-analysis of individual patient data showed that psychedelic therapy was associated with large, acute, and sustained decreases in suicidality across a range of clinical patient populations.

“This is the first analysis to synthesize suicidality outcome data from recent clinical trials with psychedelics. It gives us a better understanding of the effects of psychedelics on suicidality in the context of clinical trials,” study investigator Cory Weissman, MD, department of psychiatry, University of Toronto, told this news organization.

The evidence suggests psychedelic therapy “may reduce suicidal ideation when administered in the appropriate setting and offered to carefully screened patients,” Dr. Weissman said.

The findings were published online Jan. 18 in The Journal of Clinical Psychiatry.
 

More research needed

The analysis included seven psychedelic therapy clinical trials that had data on suicidality. Five of the trials used psilocybin plus psychotherapy and two used ayahuasca plus psychotherapy. All seven trials had a “low” risk of bias.

Patients included in the trials had treatment-resistant major depressive disorder (MDD), recurrent MDD, AIDS-related demoralization, and distress related to life-threatening cancer.

The meta-analytic results showed significant decreases in suicidality at all acute time points (80 to 240 minutes post administration) and at most post-acute time points (1 day to 4 months post administration).

Effect sizes for reductions in suicidality were “large” at all acute time points, with standardized mean differences (SMD) ranging from -1.48 to -1.72, and remained large from 1 day to 3-4 months after therapy (SMD range, -1.50 to -2.36).

At 6 months, the effect size for reductions in suicidality with psychedelic therapy was “medium” (SMD, -0.65).

Large effect sizes for reductions in suicidality occurred across the different patient populations represented in the trial, the investigators note.

No study reported any suicide-related adverse events because of administration of a psychedelic. There were also “very few” acute (6.5%) or postacute (3.0%) elevations in suicidality, “providing support for the safety of psychedelic therapy within controlled contexts,” the researchers write.

They caution, however, that large controlled trials that specifically evaluate the effect of psychedelic therapy on suicidality are needed.
 

Promising avenue

In an accompanying editorial, Daniel Grossman, BS, and Peter Hendricks, PhD, department of health behavior, University of Alabama at Birmingham, note that results of this review warrant “optimism” for use of psychedelics for treatment of suicidality.

Based on this study and others, classic psychedelic therapy for suicidality appears to be a “promising avenue” for further investigation, they write.

However, research and anecdotes about increased suicidality and other self-harm attributed to psychedelic therapy, “though evidently rare, remain a critical concern” for further research to address, Dr. Grossman and Dr. Hendricks add.

The hope is that future research “clarifies who is most subject to these risks, what factors best identify them, and how best to navigate their treatment safely,” they write.

The meta-analysis had no funding. Dr. Weissman receives funding from the Brain and Behavior Research Foundation and serves on the advisory board of GoodCap Pharmaceuticals. Dr. Hendricks is on the scientific advisory board of Bright Minds Biosciences, Eleusis Benefit Corporation, and Rest Pharmaceuticals.

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

A commonly held belief that classic psychedelic therapy can trigger suicidal thoughts, actions, or other types of self-harm is not supported by research, and, in fact, the opposite may be true.

Results from a meta-analysis of individual patient data showed that psychedelic therapy was associated with large, acute, and sustained decreases in suicidality across a range of clinical patient populations.

“This is the first analysis to synthesize suicidality outcome data from recent clinical trials with psychedelics. It gives us a better understanding of the effects of psychedelics on suicidality in the context of clinical trials,” study investigator Cory Weissman, MD, department of psychiatry, University of Toronto, told this news organization.

The evidence suggests psychedelic therapy “may reduce suicidal ideation when administered in the appropriate setting and offered to carefully screened patients,” Dr. Weissman said.

The findings were published online Jan. 18 in The Journal of Clinical Psychiatry.
 

More research needed

The analysis included seven psychedelic therapy clinical trials that had data on suicidality. Five of the trials used psilocybin plus psychotherapy and two used ayahuasca plus psychotherapy. All seven trials had a “low” risk of bias.

Patients included in the trials had treatment-resistant major depressive disorder (MDD), recurrent MDD, AIDS-related demoralization, and distress related to life-threatening cancer.

The meta-analytic results showed significant decreases in suicidality at all acute time points (80 to 240 minutes post administration) and at most post-acute time points (1 day to 4 months post administration).

Effect sizes for reductions in suicidality were “large” at all acute time points, with standardized mean differences (SMD) ranging from -1.48 to -1.72, and remained large from 1 day to 3-4 months after therapy (SMD range, -1.50 to -2.36).

At 6 months, the effect size for reductions in suicidality with psychedelic therapy was “medium” (SMD, -0.65).

Large effect sizes for reductions in suicidality occurred across the different patient populations represented in the trial, the investigators note.

No study reported any suicide-related adverse events because of administration of a psychedelic. There were also “very few” acute (6.5%) or postacute (3.0%) elevations in suicidality, “providing support for the safety of psychedelic therapy within controlled contexts,” the researchers write.

They caution, however, that large controlled trials that specifically evaluate the effect of psychedelic therapy on suicidality are needed.
 

Promising avenue

In an accompanying editorial, Daniel Grossman, BS, and Peter Hendricks, PhD, department of health behavior, University of Alabama at Birmingham, note that results of this review warrant “optimism” for use of psychedelics for treatment of suicidality.

Based on this study and others, classic psychedelic therapy for suicidality appears to be a “promising avenue” for further investigation, they write.

However, research and anecdotes about increased suicidality and other self-harm attributed to psychedelic therapy, “though evidently rare, remain a critical concern” for further research to address, Dr. Grossman and Dr. Hendricks add.

The hope is that future research “clarifies who is most subject to these risks, what factors best identify them, and how best to navigate their treatment safely,” they write.

The meta-analysis had no funding. Dr. Weissman receives funding from the Brain and Behavior Research Foundation and serves on the advisory board of GoodCap Pharmaceuticals. Dr. Hendricks is on the scientific advisory board of Bright Minds Biosciences, Eleusis Benefit Corporation, and Rest Pharmaceuticals.

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

A commonly held belief that classic psychedelic therapy can trigger suicidal thoughts, actions, or other types of self-harm is not supported by research, and, in fact, the opposite may be true.

Results from a meta-analysis of individual patient data showed that psychedelic therapy was associated with large, acute, and sustained decreases in suicidality across a range of clinical patient populations.

“This is the first analysis to synthesize suicidality outcome data from recent clinical trials with psychedelics. It gives us a better understanding of the effects of psychedelics on suicidality in the context of clinical trials,” study investigator Cory Weissman, MD, department of psychiatry, University of Toronto, told this news organization.

The evidence suggests psychedelic therapy “may reduce suicidal ideation when administered in the appropriate setting and offered to carefully screened patients,” Dr. Weissman said.

The findings were published online Jan. 18 in The Journal of Clinical Psychiatry.
 

More research needed

The analysis included seven psychedelic therapy clinical trials that had data on suicidality. Five of the trials used psilocybin plus psychotherapy and two used ayahuasca plus psychotherapy. All seven trials had a “low” risk of bias.

Patients included in the trials had treatment-resistant major depressive disorder (MDD), recurrent MDD, AIDS-related demoralization, and distress related to life-threatening cancer.

The meta-analytic results showed significant decreases in suicidality at all acute time points (80 to 240 minutes post administration) and at most post-acute time points (1 day to 4 months post administration).

Effect sizes for reductions in suicidality were “large” at all acute time points, with standardized mean differences (SMD) ranging from -1.48 to -1.72, and remained large from 1 day to 3-4 months after therapy (SMD range, -1.50 to -2.36).

At 6 months, the effect size for reductions in suicidality with psychedelic therapy was “medium” (SMD, -0.65).

Large effect sizes for reductions in suicidality occurred across the different patient populations represented in the trial, the investigators note.

No study reported any suicide-related adverse events because of administration of a psychedelic. There were also “very few” acute (6.5%) or postacute (3.0%) elevations in suicidality, “providing support for the safety of psychedelic therapy within controlled contexts,” the researchers write.

They caution, however, that large controlled trials that specifically evaluate the effect of psychedelic therapy on suicidality are needed.
 

Promising avenue

In an accompanying editorial, Daniel Grossman, BS, and Peter Hendricks, PhD, department of health behavior, University of Alabama at Birmingham, note that results of this review warrant “optimism” for use of psychedelics for treatment of suicidality.

Based on this study and others, classic psychedelic therapy for suicidality appears to be a “promising avenue” for further investigation, they write.

However, research and anecdotes about increased suicidality and other self-harm attributed to psychedelic therapy, “though evidently rare, remain a critical concern” for further research to address, Dr. Grossman and Dr. Hendricks add.

The hope is that future research “clarifies who is most subject to these risks, what factors best identify them, and how best to navigate their treatment safely,” they write.

The meta-analysis had no funding. Dr. Weissman receives funding from the Brain and Behavior Research Foundation and serves on the advisory board of GoodCap Pharmaceuticals. Dr. Hendricks is on the scientific advisory board of Bright Minds Biosciences, Eleusis Benefit Corporation, and Rest Pharmaceuticals.

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

Lisa Iezzoni, MD, a professor of medicine at Harvard Medical School and a disability researcher at Massachusetts General Hospital, both in Boston, has used a wheelchair for more than 30 years because of multiple sclerosis. When she visits her primary care doctor, she doesn’t get weighed because the scales are not wheelchair accessible.

This failure to weigh her and other patients in wheelchairs could lead to serious medical problems. Weight is used to monitor a person’s overall health and prenatal health and to determine accurate doses for medications such as some chemotherapies, said Dr. Iezzoni.

In another situation, a man who used a wheelchair said that his primary care doctor never got him out of it for a complete physical exam. The patient later developed lymphoma, which first appeared in his groin. The doctor should have accommodated his disability and used a height-adjustable exam table or a portable lift to transfer him onto the table.

When physicians don’t provide access to medical care that patients with disabilities need, they put themselves at greater risk of lawsuits, fines, and settlements.

Yet, a new study in Health Affairs suggests that a large percentage of doctors are not fully aware of what they are legally required to do.

Under federal nondiscrimination laws (Americans With Disabilities Act, American Rehabilitation Act, and ADA Amendments Act), medical practices must provide equal access to people with disabilities, accommodate their disability-related needs, and not refuse them medical services because of their disabilities, say disability experts.
 

Where doctors go wrong with disability laws

What doctors don’t know about providing reasonable accommodations makes them vulnerable to lawsuits, which worries more than two-thirds of the 714 outpatient doctors surveyed.

Not only are they required to provide reasonable accommodations, but they also have to pay for them, the researchers said. One-fifth of the surveyed doctors said they didn’t know that practice owners have to pay.

More than one practice has made patients pay for services needed for their disability, such as sign language interpreters – the patients later complained this violated the ADA to enforcement agencies.

Doctors also don’t know that they have to collaborate with patients to determine what reasonable accommodations they need – over two-thirds of those surveyed said they didn’t know it was a joint responsibility, the study found.

When doctors fail to accommodate patients’ disability needs, they engage in discrimination and violate the ADA, says Elizabeth Pendo, JD, a coauthor of the study and the Joseph J. Simeone Professor of Law at Saint Louis University.

The Department of Justice has investigated several patient complaints of alleged disability discrimination recently and resolved the disputes with agreements and small fines in some cases. “The goal is not to get large financial settlements but to work with practices to get the correct procedures in place to be compliant,” said Ms. Pendo.

Physicians would be wise to check out whether their practices are as accessible as they think. Even if there’s a ramp to the office building, the parking lot may not have a van-accessible space or enough handicapped parking signs, or the exam room may be too narrow for a wheelchair to navigate.

These practices violated the ADA and agreed to make changes:

• Hamden, Conn., has two buildings that patients with physical disabilities couldn’t easily enter. The physician owners agreed to change the buildings’ entrances and access routes and add features to make it easier to use examination rooms and restrooms and the check-in and check-out areas.
• Seven medical offices in Riverside, Calif., failed to communicate effectively with deaf and hard-of-hearing patients. They should have had a qualified sign language interpreter, an assistive listening device, or another appropriate aid or service available to a deaf patient and her family. Instead, the office relied on a video remote interpretation system that often failed to work. The agreement requires the clinic to provide those aids and services to patients and their companions who are deaf or hard of hearing, advertise their availability, assess each patient who is deaf or hard of hearing to determine the best aids and services for their needs, and pay $5,000 in compensation to the complainant and a $1,000 civil penalty to the United States.
• Springfield, Mass., refused to provide full joint replacements to two patients being treated with buprenorphine, a medication used to treat opioid use disorder. Rather than accommodate the patients, the surgeons referred them elsewhere because they were uncomfortable with the postoperative pain management protocol for patients prescribed buprenorphine. “The Americans With Disabilities Act protects health care access for people under medical treatment for opioid use disorder,” said Acting U.S. Attorney Nathaniel R. Mendell. “Health care providers must comply with the ADA, even when doing so is inconvenient or makes them uncomfortable.” The agreement requires the practice to adopt a nondiscrimination policy, provide training on the ADA and opioid use disorder, and pay two complainants $15,000 each for pain and suffering.

The DOJ has filed civil lawsuits against medical practices when they failed to resolve the allegations. Recent cases include an ophthalmology practice with 24 facilities in Arizona that refused to help transfer patients in wheelchairs to surgery tables for eye surgery and required them to pay for transfer support services and two obstetricians-gynecologists in Bakersfield, Calif., who refused to provide routine medical care to a patient because of her HIV status.
 

What doctors should know

Many people tend to think of a person with a disability as being in a wheelchair. But the ADA has a very broad definition of disability, which includes any physical or mental impairment that substantially limits any major life activity, said Ms. Pendo.

“It was amended in 2008 to clarify that the definition includes people with chronic diseases such as diabetes and cancer, cognitive and neurological disorders, substance abuse disorders, vision and hearing loss, and learning and other disabilities,” she said.

That means that doctors have to accommodate many types of disabilities, which can be challenging. The ADA only specifies that fixed structures need to be accessible, such as parking lots, driveways, and buildings, said Dr. Iezzoni.

When it comes to “reasonable accommodations,” doctors should decide that on a case-by-case basis, she said.

“We can say based on our study that 71% of doctors don’t know the right way to think about the accommodations – they don’t know they need to talk to patients so they can explain to them exactly what they need to accommodate their disability,” said Dr. Iezzoni.

Doctors are also required to provide effective communication for patients with sensory or cognitive disabilities, which can depend on the severity, said Ms. Pendo. Is the person deaf or hard of hearing, blind or partially sighted – is the dementia mild or severe?

“The requirement is there, but what that looks like will vary by patient. That’s what’s challenging,” said Ms. Pendo.

Dr. Iezzoni recommends that doctor’s offices ask patients whether they need special help or individual assistance when they make appointments and enter their responses in their records. She also suggests that patients be asked at follow-up appointments whether they still need the same help or not.

“Disabilities can change over time – a person with bad arthritis may need help getting onto an exam table, but later get a knee or hip replacement that is effective and no longer need that help,” said Dr. Iezzoni.

Benefits outweigh costs

Physicians have made progress in meeting the ADA’s physical accessibility requirements, said Dr. Iezzoni. “The literature suggests that doctors have done a good job at fixing the structural barriers people with mobility issues face, such as ramps and bathrooms.”

However, there are exceptions in rural older buildings which can be harder to retrofit for wheelchair accessibility, she said. “I recall interviewing a rural doctor several years ago who said that he knew his patients well and when a patient visits with mobility problems, he goes down and carries the patient up the steps to his office. My response was that is not respectful of the patient or safe for the patient or you. That doctor has since changed the location of his practice,” said Dr. Iezzoni.

Some doctors may resist paying for accessible medical equipment because of cost, but she said the benefits are worth it. These include preventing staff injuries when they transfer patients and being used by patients with temporary disabilities and aging people with bad knees, backs, hearing and sight. In addition, businesses may be eligible for federal and state tax credits.

Dr. Iezzoni recently visited her doctor where they finally got height-adjustable exam tables. “I asked the assistant, who really likes these tables? She said it’s the elderly ladies of short stature – the table is lowered and they sit down and get on it.”

But, Dr. Iezonni’s main message to doctors is that patients with disabilities deserve equal quality of care. “Just because we have a disability doesn’t mean we should get worse care than other people. It’s a matter of professionalism that doctors should want to give the same quality care to all their patients.”

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

Lisa Iezzoni, MD, a professor of medicine at Harvard Medical School and a disability researcher at Massachusetts General Hospital, both in Boston, has used a wheelchair for more than 30 years because of multiple sclerosis. When she visits her primary care doctor, she doesn’t get weighed because the scales are not wheelchair accessible.

This failure to weigh her and other patients in wheelchairs could lead to serious medical problems. Weight is used to monitor a person’s overall health and prenatal health and to determine accurate doses for medications such as some chemotherapies, said Dr. Iezzoni.

In another situation, a man who used a wheelchair said that his primary care doctor never got him out of it for a complete physical exam. The patient later developed lymphoma, which first appeared in his groin. The doctor should have accommodated his disability and used a height-adjustable exam table or a portable lift to transfer him onto the table.

When physicians don’t provide access to medical care that patients with disabilities need, they put themselves at greater risk of lawsuits, fines, and settlements.

Yet, a new study in Health Affairs suggests that a large percentage of doctors are not fully aware of what they are legally required to do.

Under federal nondiscrimination laws (Americans With Disabilities Act, American Rehabilitation Act, and ADA Amendments Act), medical practices must provide equal access to people with disabilities, accommodate their disability-related needs, and not refuse them medical services because of their disabilities, say disability experts.
 

Where doctors go wrong with disability laws

What doctors don’t know about providing reasonable accommodations makes them vulnerable to lawsuits, which worries more than two-thirds of the 714 outpatient doctors surveyed.

Not only are they required to provide reasonable accommodations, but they also have to pay for them, the researchers said. One-fifth of the surveyed doctors said they didn’t know that practice owners have to pay.

More than one practice has made patients pay for services needed for their disability, such as sign language interpreters – the patients later complained this violated the ADA to enforcement agencies.

Doctors also don’t know that they have to collaborate with patients to determine what reasonable accommodations they need – over two-thirds of those surveyed said they didn’t know it was a joint responsibility, the study found.

When doctors fail to accommodate patients’ disability needs, they engage in discrimination and violate the ADA, says Elizabeth Pendo, JD, a coauthor of the study and the Joseph J. Simeone Professor of Law at Saint Louis University.

The Department of Justice has investigated several patient complaints of alleged disability discrimination recently and resolved the disputes with agreements and small fines in some cases. “The goal is not to get large financial settlements but to work with practices to get the correct procedures in place to be compliant,” said Ms. Pendo.

Physicians would be wise to check out whether their practices are as accessible as they think. Even if there’s a ramp to the office building, the parking lot may not have a van-accessible space or enough handicapped parking signs, or the exam room may be too narrow for a wheelchair to navigate.

These practices violated the ADA and agreed to make changes:

• Hamden, Conn., has two buildings that patients with physical disabilities couldn’t easily enter. The physician owners agreed to change the buildings’ entrances and access routes and add features to make it easier to use examination rooms and restrooms and the check-in and check-out areas.
• Seven medical offices in Riverside, Calif., failed to communicate effectively with deaf and hard-of-hearing patients. They should have had a qualified sign language interpreter, an assistive listening device, or another appropriate aid or service available to a deaf patient and her family. Instead, the office relied on a video remote interpretation system that often failed to work. The agreement requires the clinic to provide those aids and services to patients and their companions who are deaf or hard of hearing, advertise their availability, assess each patient who is deaf or hard of hearing to determine the best aids and services for their needs, and pay $5,000 in compensation to the complainant and a $1,000 civil penalty to the United States.
• Springfield, Mass., refused to provide full joint replacements to two patients being treated with buprenorphine, a medication used to treat opioid use disorder. Rather than accommodate the patients, the surgeons referred them elsewhere because they were uncomfortable with the postoperative pain management protocol for patients prescribed buprenorphine. “The Americans With Disabilities Act protects health care access for people under medical treatment for opioid use disorder,” said Acting U.S. Attorney Nathaniel R. Mendell. “Health care providers must comply with the ADA, even when doing so is inconvenient or makes them uncomfortable.” The agreement requires the practice to adopt a nondiscrimination policy, provide training on the ADA and opioid use disorder, and pay two complainants $15,000 each for pain and suffering.

The DOJ has filed civil lawsuits against medical practices when they failed to resolve the allegations. Recent cases include an ophthalmology practice with 24 facilities in Arizona that refused to help transfer patients in wheelchairs to surgery tables for eye surgery and required them to pay for transfer support services and two obstetricians-gynecologists in Bakersfield, Calif., who refused to provide routine medical care to a patient because of her HIV status.
 

What doctors should know

Many people tend to think of a person with a disability as being in a wheelchair. But the ADA has a very broad definition of disability, which includes any physical or mental impairment that substantially limits any major life activity, said Ms. Pendo.

“It was amended in 2008 to clarify that the definition includes people with chronic diseases such as diabetes and cancer, cognitive and neurological disorders, substance abuse disorders, vision and hearing loss, and learning and other disabilities,” she said.

That means that doctors have to accommodate many types of disabilities, which can be challenging. The ADA only specifies that fixed structures need to be accessible, such as parking lots, driveways, and buildings, said Dr. Iezzoni.

When it comes to “reasonable accommodations,” doctors should decide that on a case-by-case basis, she said.

“We can say based on our study that 71% of doctors don’t know the right way to think about the accommodations – they don’t know they need to talk to patients so they can explain to them exactly what they need to accommodate their disability,” said Dr. Iezzoni.

Doctors are also required to provide effective communication for patients with sensory or cognitive disabilities, which can depend on the severity, said Ms. Pendo. Is the person deaf or hard of hearing, blind or partially sighted – is the dementia mild or severe?

“The requirement is there, but what that looks like will vary by patient. That’s what’s challenging,” said Ms. Pendo.

Dr. Iezzoni recommends that doctor’s offices ask patients whether they need special help or individual assistance when they make appointments and enter their responses in their records. She also suggests that patients be asked at follow-up appointments whether they still need the same help or not.

“Disabilities can change over time – a person with bad arthritis may need help getting onto an exam table, but later get a knee or hip replacement that is effective and no longer need that help,” said Dr. Iezzoni.

Benefits outweigh costs

Physicians have made progress in meeting the ADA’s physical accessibility requirements, said Dr. Iezzoni. “The literature suggests that doctors have done a good job at fixing the structural barriers people with mobility issues face, such as ramps and bathrooms.”

However, there are exceptions in rural older buildings which can be harder to retrofit for wheelchair accessibility, she said. “I recall interviewing a rural doctor several years ago who said that he knew his patients well and when a patient visits with mobility problems, he goes down and carries the patient up the steps to his office. My response was that is not respectful of the patient or safe for the patient or you. That doctor has since changed the location of his practice,” said Dr. Iezzoni.

Some doctors may resist paying for accessible medical equipment because of cost, but she said the benefits are worth it. These include preventing staff injuries when they transfer patients and being used by patients with temporary disabilities and aging people with bad knees, backs, hearing and sight. In addition, businesses may be eligible for federal and state tax credits.

Dr. Iezzoni recently visited her doctor where they finally got height-adjustable exam tables. “I asked the assistant, who really likes these tables? She said it’s the elderly ladies of short stature – the table is lowered and they sit down and get on it.”

But, Dr. Iezonni’s main message to doctors is that patients with disabilities deserve equal quality of care. “Just because we have a disability doesn’t mean we should get worse care than other people. It’s a matter of professionalism that doctors should want to give the same quality care to all their patients.”

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

Lisa Iezzoni, MD, a professor of medicine at Harvard Medical School and a disability researcher at Massachusetts General Hospital, both in Boston, has used a wheelchair for more than 30 years because of multiple sclerosis. When she visits her primary care doctor, she doesn’t get weighed because the scales are not wheelchair accessible.

This failure to weigh her and other patients in wheelchairs could lead to serious medical problems. Weight is used to monitor a person’s overall health and prenatal health and to determine accurate doses for medications such as some chemotherapies, said Dr. Iezzoni.

In another situation, a man who used a wheelchair said that his primary care doctor never got him out of it for a complete physical exam. The patient later developed lymphoma, which first appeared in his groin. The doctor should have accommodated his disability and used a height-adjustable exam table or a portable lift to transfer him onto the table.

When physicians don’t provide access to medical care that patients with disabilities need, they put themselves at greater risk of lawsuits, fines, and settlements.

Yet, a new study in Health Affairs suggests that a large percentage of doctors are not fully aware of what they are legally required to do.

Under federal nondiscrimination laws (Americans With Disabilities Act, American Rehabilitation Act, and ADA Amendments Act), medical practices must provide equal access to people with disabilities, accommodate their disability-related needs, and not refuse them medical services because of their disabilities, say disability experts.
 

Where doctors go wrong with disability laws

What doctors don’t know about providing reasonable accommodations makes them vulnerable to lawsuits, which worries more than two-thirds of the 714 outpatient doctors surveyed.

Not only are they required to provide reasonable accommodations, but they also have to pay for them, the researchers said. One-fifth of the surveyed doctors said they didn’t know that practice owners have to pay.

More than one practice has made patients pay for services needed for their disability, such as sign language interpreters – the patients later complained this violated the ADA to enforcement agencies.

Doctors also don’t know that they have to collaborate with patients to determine what reasonable accommodations they need – over two-thirds of those surveyed said they didn’t know it was a joint responsibility, the study found.

When doctors fail to accommodate patients’ disability needs, they engage in discrimination and violate the ADA, says Elizabeth Pendo, JD, a coauthor of the study and the Joseph J. Simeone Professor of Law at Saint Louis University.

The Department of Justice has investigated several patient complaints of alleged disability discrimination recently and resolved the disputes with agreements and small fines in some cases. “The goal is not to get large financial settlements but to work with practices to get the correct procedures in place to be compliant,” said Ms. Pendo.

Physicians would be wise to check out whether their practices are as accessible as they think. Even if there’s a ramp to the office building, the parking lot may not have a van-accessible space or enough handicapped parking signs, or the exam room may be too narrow for a wheelchair to navigate.

These practices violated the ADA and agreed to make changes:

• Hamden, Conn., has two buildings that patients with physical disabilities couldn’t easily enter. The physician owners agreed to change the buildings’ entrances and access routes and add features to make it easier to use examination rooms and restrooms and the check-in and check-out areas.
• Seven medical offices in Riverside, Calif., failed to communicate effectively with deaf and hard-of-hearing patients. They should have had a qualified sign language interpreter, an assistive listening device, or another appropriate aid or service available to a deaf patient and her family. Instead, the office relied on a video remote interpretation system that often failed to work. The agreement requires the clinic to provide those aids and services to patients and their companions who are deaf or hard of hearing, advertise their availability, assess each patient who is deaf or hard of hearing to determine the best aids and services for their needs, and pay $5,000 in compensation to the complainant and a $1,000 civil penalty to the United States.
• Springfield, Mass., refused to provide full joint replacements to two patients being treated with buprenorphine, a medication used to treat opioid use disorder. Rather than accommodate the patients, the surgeons referred them elsewhere because they were uncomfortable with the postoperative pain management protocol for patients prescribed buprenorphine. “The Americans With Disabilities Act protects health care access for people under medical treatment for opioid use disorder,” said Acting U.S. Attorney Nathaniel R. Mendell. “Health care providers must comply with the ADA, even when doing so is inconvenient or makes them uncomfortable.” The agreement requires the practice to adopt a nondiscrimination policy, provide training on the ADA and opioid use disorder, and pay two complainants $15,000 each for pain and suffering.

The DOJ has filed civil lawsuits against medical practices when they failed to resolve the allegations. Recent cases include an ophthalmology practice with 24 facilities in Arizona that refused to help transfer patients in wheelchairs to surgery tables for eye surgery and required them to pay for transfer support services and two obstetricians-gynecologists in Bakersfield, Calif., who refused to provide routine medical care to a patient because of her HIV status.
 

What doctors should know

Many people tend to think of a person with a disability as being in a wheelchair. But the ADA has a very broad definition of disability, which includes any physical or mental impairment that substantially limits any major life activity, said Ms. Pendo.

“It was amended in 2008 to clarify that the definition includes people with chronic diseases such as diabetes and cancer, cognitive and neurological disorders, substance abuse disorders, vision and hearing loss, and learning and other disabilities,” she said.

That means that doctors have to accommodate many types of disabilities, which can be challenging. The ADA only specifies that fixed structures need to be accessible, such as parking lots, driveways, and buildings, said Dr. Iezzoni.

When it comes to “reasonable accommodations,” doctors should decide that on a case-by-case basis, she said.

“We can say based on our study that 71% of doctors don’t know the right way to think about the accommodations – they don’t know they need to talk to patients so they can explain to them exactly what they need to accommodate their disability,” said Dr. Iezzoni.

Doctors are also required to provide effective communication for patients with sensory or cognitive disabilities, which can depend on the severity, said Ms. Pendo. Is the person deaf or hard of hearing, blind or partially sighted – is the dementia mild or severe?

“The requirement is there, but what that looks like will vary by patient. That’s what’s challenging,” said Ms. Pendo.

Dr. Iezzoni recommends that doctor’s offices ask patients whether they need special help or individual assistance when they make appointments and enter their responses in their records. She also suggests that patients be asked at follow-up appointments whether they still need the same help or not.

“Disabilities can change over time – a person with bad arthritis may need help getting onto an exam table, but later get a knee or hip replacement that is effective and no longer need that help,” said Dr. Iezzoni.

Benefits outweigh costs

Physicians have made progress in meeting the ADA’s physical accessibility requirements, said Dr. Iezzoni. “The literature suggests that doctors have done a good job at fixing the structural barriers people with mobility issues face, such as ramps and bathrooms.”

However, there are exceptions in rural older buildings which can be harder to retrofit for wheelchair accessibility, she said. “I recall interviewing a rural doctor several years ago who said that he knew his patients well and when a patient visits with mobility problems, he goes down and carries the patient up the steps to his office. My response was that is not respectful of the patient or safe for the patient or you. That doctor has since changed the location of his practice,” said Dr. Iezzoni.

Some doctors may resist paying for accessible medical equipment because of cost, but she said the benefits are worth it. These include preventing staff injuries when they transfer patients and being used by patients with temporary disabilities and aging people with bad knees, backs, hearing and sight. In addition, businesses may be eligible for federal and state tax credits.

Dr. Iezzoni recently visited her doctor where they finally got height-adjustable exam tables. “I asked the assistant, who really likes these tables? She said it’s the elderly ladies of short stature – the table is lowered and they sit down and get on it.”

But, Dr. Iezonni’s main message to doctors is that patients with disabilities deserve equal quality of care. “Just because we have a disability doesn’t mean we should get worse care than other people. It’s a matter of professionalism that doctors should want to give the same quality care to all their patients.”

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

The newly approved insomnia drug daridorexant (Quviviq) improves sleep onset in adults, new phase 3 data suggest.  In the first of two studies, a 50-mg dose of daridorexant was associated with a reduction in latency to persistent sleep (LPS) of 11.7 minutes at month 3 versus placebo. The drug also was associated with improved daytime function.

Based on these results, the Food and Drug Administration approved daridorexant for the treatment of insomnia in adults earlier in January.

“The study shows that it is a really good drug that works differently from most other drugs,” said Emmanuel Mignot, MD, PhD, professor of sleep medicine at Stanford (Calif.) University. “It’s more specific to sleep,” Dr. Mignot added.

The findings were published in the February issue of The Lancet Neurology.
 

Two trials, three doses

Daridorexant is a dual orexin receptor antagonist intended to reduce excessive wakefulness. The investigators hypothesized that, because of its therapeutic target, the drug would not cause sleepiness on the morning after administration.

To examine daridorexant’s safety and efficacy, the researchers conducted two double-blind, parallel-group, phase 3 trials. Eligible participants were aged 18 years or older, had moderate to severe insomnia disorder, and had a self-reported history of disturbed sleep at least 3 nights per week for at least 3 months before screening.

In study 1, investigators randomly assigned participants in groups of equal size to daridorexant 25 mg, 50 mg, or placebo. In study 2, participants were randomly assigned to daridorexant 10 mg, 25 mg, or placebo.

During a placebo run-in period, participants underwent polysomnography on two consecutive nights to define baseline values. At the end of months 1 and 3 of the treatment period, participants again underwent 2 nights of polysomnography. A final night of polysomnography occurred during the placebo run-out period.

Self-assessments included the Insomnia Daytime Symptoms and Impacts Questionnaire (IDSIQ). This questionnaire, to which participants responded daily, is designed to measure the daytime impairments related to insomnia. The IDSIQ questions focus on sleepiness, mood, alertness, and cognition.

The study’s primary endpoints were change from baseline in wake after sleep onset (WASO) and LPS at months 1 and 3. Secondary endpoints were change from baseline in self-reported total sleep time and change in the IDSIQ sleepiness domain score at months 1 and 3.

The investigators enrolled 930 participants in study 1 and 924 in study 2. In each study, more than two-thirds of participants were women, 39% were aged 65 or older, and demographic and baseline characteristics were similar between treatment groups.
 

Dose-dependent effects

At month 1 in study 1, WASO was reduced by 22.8 minutes (P < .0001) in patients who received the 50-mg dose and by 12.2 minutes (P < .0001) in the 25-mg dose. At month 3, WASO was reduced by 18.3 minutes (P < .0001) in those assigned to 50 mg and by 11.9 minutes (P < .0001) in those assigned to 25 mg.

LPS was reduced by 11.4 minutes (P < .0001) at month 1 and by 11.7 minutes (P < .0001) at month 3 with the 50-mg dose versus placebo. LPS was reduced by 8.3 minutes (P = .0005) at month 1 and by 7.6 minutes (P = .0015) at month 3 with the 25-mg dose versus placebo.

At both time points, self-reported total sleep time was significantly increased and the IDSIQ sleepiness score significantly improved with the 50-mg dose. The 25-mg dose was associated with significant improvements in self-reported total sleep time at both time points, but not with significant improvements in IDSIQ sleepiness score.

In study 2, the 25-mg dose was associated with significant reductions in WASO at month 1 (11.6 minutes, P = .0001) and month 3 (10.3 minutes, P = .0028) compared with placebo. The 25-mg dose was not associated with significant differences in LPS at either time point, however.

Similarly, the 25-mg dose was associated with improvements in self-reported total sleep time, but not with the IDSIQ sleepiness score. The 10-mg dose was not associated with improvements on any endpoint compared with placebo.
 

Longer studies needed

In an accompanying editorial, Kai Spiegelhalder, PhD, University of Freiburg, Germany, and colleagues pointed out that although insomnia disorder is defined by self-reported difficulty initiating or maintaining sleep, none of the primary or secondary endpoints in these trials addressed these symptoms.

However, Dr. Mignot noted the use of the IDSIQ scale is the most interesting aspect of the study. Although difficulty with concentration and mood impairment are major symptoms of insomnia, they are often neglected. “This drug was reversing the daytime impairment that insomniacs have,” said Dr. Mignot. “We now need to systematically study people not only for the effect on sleep, but also that it makes them feel better the day after.”

He added that most of the current hypnotics were not developed to treat insomnia. Daridorexant, in contrast, targets the wake-promoting orexin system. “It works more selectively on sleep and not on other things. Most of the other sleeping pills have more complex effects on the brain,” Dr. Mignot said.

Commenting on the study, John Winkelman, MD, PhD, professor of psychiatry at Harvard Medical School, Boston, said the low prevalence of side effects associated with daridorexant was remarkable. “This is not what most of the benzodiazepine receptor agonists looked like,” said Dr. Winkelman, who was not involved with the research.

Many insomnia drugs affect transmitter systems that are widespread in the brain, thus provoking side effects. But orexin-receptor antagonists “don’t seem to produce a lot of side effects,” he noted.

Although the study duration was reasonable, longer studies will be necessary, he added. “And it would be nice to see comparative data. Prescribers want to see some context.” said Dr. Winkelman.

The study was funded by Idorsia Pharmaceuticals. Dr. Mignot reported receiving research or clinical trial funding from Axsome, Jazz Pharmaceuticals, Avadel, Apple, Huami, Sunovion, and Takeda. He has also received consulting fees or speakers’ conference reimbursement from Idorsia, Centessa Pharmaceuticals, Jazz Pharmaceuticals, Avadel, Dreem, and Takeda. Dr. Winkelman has consulted for Idorsia and has participated in investigator-initiated studies supported by Merck.

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

The newly approved insomnia drug daridorexant (Quviviq) improves sleep onset in adults, new phase 3 data suggest.  In the first of two studies, a 50-mg dose of daridorexant was associated with a reduction in latency to persistent sleep (LPS) of 11.7 minutes at month 3 versus placebo. The drug also was associated with improved daytime function.

Based on these results, the Food and Drug Administration approved daridorexant for the treatment of insomnia in adults earlier in January.

“The study shows that it is a really good drug that works differently from most other drugs,” said Emmanuel Mignot, MD, PhD, professor of sleep medicine at Stanford (Calif.) University. “It’s more specific to sleep,” Dr. Mignot added.

The findings were published in the February issue of The Lancet Neurology.
 

Two trials, three doses

Daridorexant is a dual orexin receptor antagonist intended to reduce excessive wakefulness. The investigators hypothesized that, because of its therapeutic target, the drug would not cause sleepiness on the morning after administration.

To examine daridorexant’s safety and efficacy, the researchers conducted two double-blind, parallel-group, phase 3 trials. Eligible participants were aged 18 years or older, had moderate to severe insomnia disorder, and had a self-reported history of disturbed sleep at least 3 nights per week for at least 3 months before screening.

In study 1, investigators randomly assigned participants in groups of equal size to daridorexant 25 mg, 50 mg, or placebo. In study 2, participants were randomly assigned to daridorexant 10 mg, 25 mg, or placebo.

During a placebo run-in period, participants underwent polysomnography on two consecutive nights to define baseline values. At the end of months 1 and 3 of the treatment period, participants again underwent 2 nights of polysomnography. A final night of polysomnography occurred during the placebo run-out period.

Self-assessments included the Insomnia Daytime Symptoms and Impacts Questionnaire (IDSIQ). This questionnaire, to which participants responded daily, is designed to measure the daytime impairments related to insomnia. The IDSIQ questions focus on sleepiness, mood, alertness, and cognition.

The study’s primary endpoints were change from baseline in wake after sleep onset (WASO) and LPS at months 1 and 3. Secondary endpoints were change from baseline in self-reported total sleep time and change in the IDSIQ sleepiness domain score at months 1 and 3.

The investigators enrolled 930 participants in study 1 and 924 in study 2. In each study, more than two-thirds of participants were women, 39% were aged 65 or older, and demographic and baseline characteristics were similar between treatment groups.
 

Dose-dependent effects

At month 1 in study 1, WASO was reduced by 22.8 minutes (P < .0001) in patients who received the 50-mg dose and by 12.2 minutes (P < .0001) in the 25-mg dose. At month 3, WASO was reduced by 18.3 minutes (P < .0001) in those assigned to 50 mg and by 11.9 minutes (P < .0001) in those assigned to 25 mg.

LPS was reduced by 11.4 minutes (P < .0001) at month 1 and by 11.7 minutes (P < .0001) at month 3 with the 50-mg dose versus placebo. LPS was reduced by 8.3 minutes (P = .0005) at month 1 and by 7.6 minutes (P = .0015) at month 3 with the 25-mg dose versus placebo.

At both time points, self-reported total sleep time was significantly increased and the IDSIQ sleepiness score significantly improved with the 50-mg dose. The 25-mg dose was associated with significant improvements in self-reported total sleep time at both time points, but not with significant improvements in IDSIQ sleepiness score.

In study 2, the 25-mg dose was associated with significant reductions in WASO at month 1 (11.6 minutes, P = .0001) and month 3 (10.3 minutes, P = .0028) compared with placebo. The 25-mg dose was not associated with significant differences in LPS at either time point, however.

Similarly, the 25-mg dose was associated with improvements in self-reported total sleep time, but not with the IDSIQ sleepiness score. The 10-mg dose was not associated with improvements on any endpoint compared with placebo.
 

Longer studies needed

In an accompanying editorial, Kai Spiegelhalder, PhD, University of Freiburg, Germany, and colleagues pointed out that although insomnia disorder is defined by self-reported difficulty initiating or maintaining sleep, none of the primary or secondary endpoints in these trials addressed these symptoms.

However, Dr. Mignot noted the use of the IDSIQ scale is the most interesting aspect of the study. Although difficulty with concentration and mood impairment are major symptoms of insomnia, they are often neglected. “This drug was reversing the daytime impairment that insomniacs have,” said Dr. Mignot. “We now need to systematically study people not only for the effect on sleep, but also that it makes them feel better the day after.”

He added that most of the current hypnotics were not developed to treat insomnia. Daridorexant, in contrast, targets the wake-promoting orexin system. “It works more selectively on sleep and not on other things. Most of the other sleeping pills have more complex effects on the brain,” Dr. Mignot said.

Commenting on the study, John Winkelman, MD, PhD, professor of psychiatry at Harvard Medical School, Boston, said the low prevalence of side effects associated with daridorexant was remarkable. “This is not what most of the benzodiazepine receptor agonists looked like,” said Dr. Winkelman, who was not involved with the research.

Many insomnia drugs affect transmitter systems that are widespread in the brain, thus provoking side effects. But orexin-receptor antagonists “don’t seem to produce a lot of side effects,” he noted.

Although the study duration was reasonable, longer studies will be necessary, he added. “And it would be nice to see comparative data. Prescribers want to see some context.” said Dr. Winkelman.

The study was funded by Idorsia Pharmaceuticals. Dr. Mignot reported receiving research or clinical trial funding from Axsome, Jazz Pharmaceuticals, Avadel, Apple, Huami, Sunovion, and Takeda. He has also received consulting fees or speakers’ conference reimbursement from Idorsia, Centessa Pharmaceuticals, Jazz Pharmaceuticals, Avadel, Dreem, and Takeda. Dr. Winkelman has consulted for Idorsia and has participated in investigator-initiated studies supported by Merck.

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

The newly approved insomnia drug daridorexant (Quviviq) improves sleep onset in adults, new phase 3 data suggest.  In the first of two studies, a 50-mg dose of daridorexant was associated with a reduction in latency to persistent sleep (LPS) of 11.7 minutes at month 3 versus placebo. The drug also was associated with improved daytime function.

Based on these results, the Food and Drug Administration approved daridorexant for the treatment of insomnia in adults earlier in January.

“The study shows that it is a really good drug that works differently from most other drugs,” said Emmanuel Mignot, MD, PhD, professor of sleep medicine at Stanford (Calif.) University. “It’s more specific to sleep,” Dr. Mignot added.

The findings were published in the February issue of The Lancet Neurology.
 

Two trials, three doses

Daridorexant is a dual orexin receptor antagonist intended to reduce excessive wakefulness. The investigators hypothesized that, because of its therapeutic target, the drug would not cause sleepiness on the morning after administration.

To examine daridorexant’s safety and efficacy, the researchers conducted two double-blind, parallel-group, phase 3 trials. Eligible participants were aged 18 years or older, had moderate to severe insomnia disorder, and had a self-reported history of disturbed sleep at least 3 nights per week for at least 3 months before screening.

In study 1, investigators randomly assigned participants in groups of equal size to daridorexant 25 mg, 50 mg, or placebo. In study 2, participants were randomly assigned to daridorexant 10 mg, 25 mg, or placebo.

During a placebo run-in period, participants underwent polysomnography on two consecutive nights to define baseline values. At the end of months 1 and 3 of the treatment period, participants again underwent 2 nights of polysomnography. A final night of polysomnography occurred during the placebo run-out period.

Self-assessments included the Insomnia Daytime Symptoms and Impacts Questionnaire (IDSIQ). This questionnaire, to which participants responded daily, is designed to measure the daytime impairments related to insomnia. The IDSIQ questions focus on sleepiness, mood, alertness, and cognition.

The study’s primary endpoints were change from baseline in wake after sleep onset (WASO) and LPS at months 1 and 3. Secondary endpoints were change from baseline in self-reported total sleep time and change in the IDSIQ sleepiness domain score at months 1 and 3.

The investigators enrolled 930 participants in study 1 and 924 in study 2. In each study, more than two-thirds of participants were women, 39% were aged 65 or older, and demographic and baseline characteristics were similar between treatment groups.
 

Dose-dependent effects

At month 1 in study 1, WASO was reduced by 22.8 minutes (P < .0001) in patients who received the 50-mg dose and by 12.2 minutes (P < .0001) in the 25-mg dose. At month 3, WASO was reduced by 18.3 minutes (P < .0001) in those assigned to 50 mg and by 11.9 minutes (P < .0001) in those assigned to 25 mg.

LPS was reduced by 11.4 minutes (P < .0001) at month 1 and by 11.7 minutes (P < .0001) at month 3 with the 50-mg dose versus placebo. LPS was reduced by 8.3 minutes (P = .0005) at month 1 and by 7.6 minutes (P = .0015) at month 3 with the 25-mg dose versus placebo.

At both time points, self-reported total sleep time was significantly increased and the IDSIQ sleepiness score significantly improved with the 50-mg dose. The 25-mg dose was associated with significant improvements in self-reported total sleep time at both time points, but not with significant improvements in IDSIQ sleepiness score.

In study 2, the 25-mg dose was associated with significant reductions in WASO at month 1 (11.6 minutes, P = .0001) and month 3 (10.3 minutes, P = .0028) compared with placebo. The 25-mg dose was not associated with significant differences in LPS at either time point, however.

Similarly, the 25-mg dose was associated with improvements in self-reported total sleep time, but not with the IDSIQ sleepiness score. The 10-mg dose was not associated with improvements on any endpoint compared with placebo.
 

Longer studies needed

In an accompanying editorial, Kai Spiegelhalder, PhD, University of Freiburg, Germany, and colleagues pointed out that although insomnia disorder is defined by self-reported difficulty initiating or maintaining sleep, none of the primary or secondary endpoints in these trials addressed these symptoms.

However, Dr. Mignot noted the use of the IDSIQ scale is the most interesting aspect of the study. Although difficulty with concentration and mood impairment are major symptoms of insomnia, they are often neglected. “This drug was reversing the daytime impairment that insomniacs have,” said Dr. Mignot. “We now need to systematically study people not only for the effect on sleep, but also that it makes them feel better the day after.”

He added that most of the current hypnotics were not developed to treat insomnia. Daridorexant, in contrast, targets the wake-promoting orexin system. “It works more selectively on sleep and not on other things. Most of the other sleeping pills have more complex effects on the brain,” Dr. Mignot said.

Commenting on the study, John Winkelman, MD, PhD, professor of psychiatry at Harvard Medical School, Boston, said the low prevalence of side effects associated with daridorexant was remarkable. “This is not what most of the benzodiazepine receptor agonists looked like,” said Dr. Winkelman, who was not involved with the research.

Many insomnia drugs affect transmitter systems that are widespread in the brain, thus provoking side effects. But orexin-receptor antagonists “don’t seem to produce a lot of side effects,” he noted.

Although the study duration was reasonable, longer studies will be necessary, he added. “And it would be nice to see comparative data. Prescribers want to see some context.” said Dr. Winkelman.

The study was funded by Idorsia Pharmaceuticals. Dr. Mignot reported receiving research or clinical trial funding from Axsome, Jazz Pharmaceuticals, Avadel, Apple, Huami, Sunovion, and Takeda. He has also received consulting fees or speakers’ conference reimbursement from Idorsia, Centessa Pharmaceuticals, Jazz Pharmaceuticals, Avadel, Dreem, and Takeda. Dr. Winkelman has consulted for Idorsia and has participated in investigator-initiated studies supported by Merck.

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

The Omicron subvariant, known as BA.2, spreads about 1.5 times faster than the original Omicron strain, known as BA.1, according to CNBC.

The Statens Serum Institut, which monitors infectious diseases in Denmark, said that BA.2 is more contagious, but it doesn’t appear to increase hospitalizations or reduce how well the vaccine works.

BA.2 overtook BA.1 as the primary variant in Denmark within a few weeks, Troels Lillebaek, director of the institute, told CNBC. The subvariant has five unique mutations on a key part of the spike protein, which is what the coronavirus uses to invade human cells. This often means a higher rate of spreading.

The Omicron subvariant has been detected in at least 29 states in the United States and 56 countries, according to the latest update from Outbreak.info. The United States has detected 188 infections, with the worldwide total nearing 25,000.

Denmark has reported the highest number of cases, followed by the United Kingdom and India. Both Denmark and India have reported that BA.2 now accounts for about half of new COVID-19 cases in those countries.

On Jan. 28, the U.K. Health Security Agency said BA.2 has a “substantial” growth advantage over the original Omicron strain. The subvariant has spread faster in all regions of England where there were enough cases to conduct an analysis, the agency said in a report.

A preliminary evaluation found that BA.2 doesn’t appear to change how well the vaccine works compared to the original Omicron strain, the agency said. A booster dose was 70% effective at preventing symptomatic illness for BA.2, compared with 63% for the original Omicron strain.

The Centers for Disease Control and Prevention also said on Jan. 28 that, although the subvariant has become more common in some countries, it is currently at a low level in the United States and doesn’t appear to be more serious.

“Currently there is no evidence that the BA.2 lineage is more severe than the BA.1 lineage,” Kristen Nordlund, a CDC spokesperson, told CNBC.

The World Health Organization hasn’t labeled BA.2 a “variant of concern” so far but will continue to monitor it. WHO officials have said that new variants will arise as Omicron spreads across the world.

“The next variant of concern will be more fit, and what we mean by that is it will be more transmissible because it will have to overtake what is currently circulating,” Maria Van Kerkhove, the WHO’s COVID-19 technical lead, said during a livestream on Jan. 25.

“The big question is whether or not future variants will be more or less severe,” she said.

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

The Omicron subvariant, known as BA.2, spreads about 1.5 times faster than the original Omicron strain, known as BA.1, according to CNBC.

The Statens Serum Institut, which monitors infectious diseases in Denmark, said that BA.2 is more contagious, but it doesn’t appear to increase hospitalizations or reduce how well the vaccine works.

BA.2 overtook BA.1 as the primary variant in Denmark within a few weeks, Troels Lillebaek, director of the institute, told CNBC. The subvariant has five unique mutations on a key part of the spike protein, which is what the coronavirus uses to invade human cells. This often means a higher rate of spreading.

The Omicron subvariant has been detected in at least 29 states in the United States and 56 countries, according to the latest update from Outbreak.info. The United States has detected 188 infections, with the worldwide total nearing 25,000.

Denmark has reported the highest number of cases, followed by the United Kingdom and India. Both Denmark and India have reported that BA.2 now accounts for about half of new COVID-19 cases in those countries.

On Jan. 28, the U.K. Health Security Agency said BA.2 has a “substantial” growth advantage over the original Omicron strain. The subvariant has spread faster in all regions of England where there were enough cases to conduct an analysis, the agency said in a report.

A preliminary evaluation found that BA.2 doesn’t appear to change how well the vaccine works compared to the original Omicron strain, the agency said. A booster dose was 70% effective at preventing symptomatic illness for BA.2, compared with 63% for the original Omicron strain.

The Centers for Disease Control and Prevention also said on Jan. 28 that, although the subvariant has become more common in some countries, it is currently at a low level in the United States and doesn’t appear to be more serious.

“Currently there is no evidence that the BA.2 lineage is more severe than the BA.1 lineage,” Kristen Nordlund, a CDC spokesperson, told CNBC.

The World Health Organization hasn’t labeled BA.2 a “variant of concern” so far but will continue to monitor it. WHO officials have said that new variants will arise as Omicron spreads across the world.

“The next variant of concern will be more fit, and what we mean by that is it will be more transmissible because it will have to overtake what is currently circulating,” Maria Van Kerkhove, the WHO’s COVID-19 technical lead, said during a livestream on Jan. 25.

“The big question is whether or not future variants will be more or less severe,” she said.

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

The Omicron subvariant, known as BA.2, spreads about 1.5 times faster than the original Omicron strain, known as BA.1, according to CNBC.

The Statens Serum Institut, which monitors infectious diseases in Denmark, said that BA.2 is more contagious, but it doesn’t appear to increase hospitalizations or reduce how well the vaccine works.

BA.2 overtook BA.1 as the primary variant in Denmark within a few weeks, Troels Lillebaek, director of the institute, told CNBC. The subvariant has five unique mutations on a key part of the spike protein, which is what the coronavirus uses to invade human cells. This often means a higher rate of spreading.

The Omicron subvariant has been detected in at least 29 states in the United States and 56 countries, according to the latest update from Outbreak.info. The United States has detected 188 infections, with the worldwide total nearing 25,000.

Denmark has reported the highest number of cases, followed by the United Kingdom and India. Both Denmark and India have reported that BA.2 now accounts for about half of new COVID-19 cases in those countries.

On Jan. 28, the U.K. Health Security Agency said BA.2 has a “substantial” growth advantage over the original Omicron strain. The subvariant has spread faster in all regions of England where there were enough cases to conduct an analysis, the agency said in a report.

A preliminary evaluation found that BA.2 doesn’t appear to change how well the vaccine works compared to the original Omicron strain, the agency said. A booster dose was 70% effective at preventing symptomatic illness for BA.2, compared with 63% for the original Omicron strain.

The Centers for Disease Control and Prevention also said on Jan. 28 that, although the subvariant has become more common in some countries, it is currently at a low level in the United States and doesn’t appear to be more serious.

“Currently there is no evidence that the BA.2 lineage is more severe than the BA.1 lineage,” Kristen Nordlund, a CDC spokesperson, told CNBC.

The World Health Organization hasn’t labeled BA.2 a “variant of concern” so far but will continue to monitor it. WHO officials have said that new variants will arise as Omicron spreads across the world.

“The next variant of concern will be more fit, and what we mean by that is it will be more transmissible because it will have to overtake what is currently circulating,” Maria Van Kerkhove, the WHO’s COVID-19 technical lead, said during a livestream on Jan. 25.

“The big question is whether or not future variants will be more or less severe,” she said.

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

High plasma concentrations of buprenorphine may reduce fentanyl-induced respiratory depression, new research suggests.

The primary endpoint measure in a small “proof of principal” pharmacology study was effect of escalating fentanyl dosing on respiratory depression by way of decreased isohypercapnic minute ventilation (VE) – or volume of gas inhaled or exhaled per minute from the lungs.

sdominick/iStock/Getty Images

Results showed the maximum decrease in highest-dose fentanyl-induced VE was almost 50% less for opioid-tolerant patients receiving a 2.0 ng/mL concentration of steady-state plasma buprenorphine than when receiving matching placebo.

Risk for apnea requiring stimulation after fentanyl dosing was also significantly lower with buprenorphine.

“Even though the study is small, a lot of data were collected which will allow us to very accurately predict which plasma concentrations, and therefore drug doses, are needed to protect people adequately in practice,” study coinvestigator Geert Jan Groeneveld, MD, PhD, neurologist and clinical pharmacologist at the Centre for Human Drug Research, Leiden, the Netherlands, and professor of clinical neuropharmacology at Leiden University Medical Center, told this news organization.

He added the “beautiful results” were in line with what the researchers expected and although further research is needed, the study provides a lot of useful information for clinicians.

“I think this is an approach that works, and this study makes that clear,” Dr. Groeneveld added.

The findings were published online Jan. 27, 2022, in PLoS One.
 

High death rate from synthetic opioids

A recent report from the Centers for Disease Control and Prevention noted that, between June 2020 and June 2021, there were more than 100,000 drug overdose deaths in the United States. Of these, more than 73,000 were attributed to opioids and more than 60,000 to synthetic opioids such as fentanyl.

Most opioid-related overdose deaths in the United States are attributable to synthetic opioids “that can unexpectedly cause respiratory depression by being ingested as a substitute for heroin or with [other] drugs,” Indivior noted in a press release.

Buprenorphine is a partial agonist that “binds with high affinity to mu-opioid receptors but displays partial respiratory depression effects,” the investigators wrote.

As reported by this news organization, the Food and Drug Administration approved buprenorphine extended release (Sublocade, Indivior) in 2017 as the first once-monthly injection for the treatment of opioid use disorder.

In the current study, which was conducted in Leiden, the Netherlands, the investigators used continuous intravenous buprenorphine in order to “mimic” the sustained plasma concentrations of the drug that can be delivered with the long-acting injectable, noted Christian Heidbreder, PhD, chief scientific officer at Indivior.

“This was an experimental medicine study, whereby we used intravenous buprenorphine to really understand the interaction with escalating doses of fentanyl” on respiratory depression, he told this news organization.
 

Two-part, two-period study

In part A, period one of the two-period crossover study, 14 healthy volunteers were randomly assigned to receive for 360 minutes continuous infusion of 0.02 or 0.05 mg/70 kg per hour of buprenorphine to target plasma concentrations of 0.2 or 0.5 ng/mL, respectively, or matching placebo. In the second period, participants received the alternative infusion – either placebo or the active drug.

In part B, eight opioid-tolerant patients who had used high-dose opioids for at least 3 months prior received a higher infusion rate of 0.1, 0.2, or 0.5 mg/70 kg per hour to target plasma concentrations of 1, 2, or 5 ng/mL, respectively.

The 2 ng/mL “is a very important threshold for us” and the result from several previous experiments, Dr. Heidbreder noted. So the investigators targeted that concentration as well as one below and one “much higher” in the current study.

“Because tolerance to opioid effects is poorly characterized in patients receiving long-term opioids, opioid-tolerant participants in part B had a fixed treatment sequence, receiving placebo infusion plus fentanyl challenges in period 1 to optimize the fentanyl dose escalation before buprenorphine and fentanyl were coadministered in period 2,” the investigators reported.

All participants received up to four escalating doses of intravenous fentanyl after reaching target buprenorphine plasma concentrations.

For healthy volunteers, the planned fentanyl doses were 0.075, 0.15, 0.25, and 0.35 mg/70 kg. For the opioid-tolerant patients, the doses were 0.25, 0.35, 0.5, and 0.7 mg/70 kg.

The infusions began after baseline VE had stabilized at 20 plus or minus 2 L/min, which is about four times above normal resting VE.
 

First clinical evidence?

Results showed fentanyl-induced adverse changes in VE were less at higher concentrations of buprenorphine plasma.

Opioid-tolerant patients receiving the 2.0 ng/mL concentration of buprenorphine had a 33.7% decrease in highest dose fentanyl-induced VE versus an 82.3% decrease when receiving placebo.

In addition, fentanyl reduced VE up to 49% (95% confidence interval, 21%-76%) in opioid-tolerant patients in all buprenorphine concentration groups combined versus reducing VE up to 100% (95% CI, 68%-132%) during placebo infusion (P = .006).

In addition, buprenorphine was associated with a lower risk versus placebo for apnea requiring verbal stimulation after fentanyl dosing (odds ratio, 0.07; P = .001).

For the healthy volunteers, the first fentanyl bolus reduced VE by 26% for those at target buprenorphine concentration of 0.5 ng/mL versus 51% when receiving placebo (P = .001). The second bolus reduced VE by 47% versus 79%, respectively (P < .001).

“Discontinuations for apnea limited treatment comparisons beyond the second fentanyl injection,” the investigators reported.

Overall, the findings “provide the first clinical evidence that high sustained plasma concentrations of buprenorphine may protect against respiratory depression induced by potent opioids,” they added.

Additional research is now “warranted to assess the competitive interaction of buprenorphine and fentanyl (as well as other illicitly manufactured fentanyl analogs) as we continue to deepen our understanding of buprenorphine as an evidence-based treatment for patients struggling with opioid use disorder,” Dr. Heidbreder said in a press release.

It’s unclear whether the study’s findings are generalizable to other populations, said Dr. Heidbreder.

“So what we are going to do next is to see what is actually happening in a real world, much broader patient population; and for that we’ll be using [the injectable] Sublocade as the medication of choice,” said Dr. Heidbreder.

“Conceptually, we feel confident about these data, but now we need to demonstrate what is happening in the real world,” he added.

The study was funded by Indivior. Dr. Groeneveld has reported no relevant financial relationships. Dr. Heidbreder is an employee of Indivior.

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

High plasma concentrations of buprenorphine may reduce fentanyl-induced respiratory depression, new research suggests.

The primary endpoint measure in a small “proof of principal” pharmacology study was effect of escalating fentanyl dosing on respiratory depression by way of decreased isohypercapnic minute ventilation (VE) – or volume of gas inhaled or exhaled per minute from the lungs.

sdominick/iStock/Getty Images

Results showed the maximum decrease in highest-dose fentanyl-induced VE was almost 50% less for opioid-tolerant patients receiving a 2.0 ng/mL concentration of steady-state plasma buprenorphine than when receiving matching placebo.

Risk for apnea requiring stimulation after fentanyl dosing was also significantly lower with buprenorphine.

“Even though the study is small, a lot of data were collected which will allow us to very accurately predict which plasma concentrations, and therefore drug doses, are needed to protect people adequately in practice,” study coinvestigator Geert Jan Groeneveld, MD, PhD, neurologist and clinical pharmacologist at the Centre for Human Drug Research, Leiden, the Netherlands, and professor of clinical neuropharmacology at Leiden University Medical Center, told this news organization.

He added the “beautiful results” were in line with what the researchers expected and although further research is needed, the study provides a lot of useful information for clinicians.

“I think this is an approach that works, and this study makes that clear,” Dr. Groeneveld added.

The findings were published online Jan. 27, 2022, in PLoS One.
 

High death rate from synthetic opioids

A recent report from the Centers for Disease Control and Prevention noted that, between June 2020 and June 2021, there were more than 100,000 drug overdose deaths in the United States. Of these, more than 73,000 were attributed to opioids and more than 60,000 to synthetic opioids such as fentanyl.

Most opioid-related overdose deaths in the United States are attributable to synthetic opioids “that can unexpectedly cause respiratory depression by being ingested as a substitute for heroin or with [other] drugs,” Indivior noted in a press release.

Buprenorphine is a partial agonist that “binds with high affinity to mu-opioid receptors but displays partial respiratory depression effects,” the investigators wrote.

As reported by this news organization, the Food and Drug Administration approved buprenorphine extended release (Sublocade, Indivior) in 2017 as the first once-monthly injection for the treatment of opioid use disorder.

In the current study, which was conducted in Leiden, the Netherlands, the investigators used continuous intravenous buprenorphine in order to “mimic” the sustained plasma concentrations of the drug that can be delivered with the long-acting injectable, noted Christian Heidbreder, PhD, chief scientific officer at Indivior.

“This was an experimental medicine study, whereby we used intravenous buprenorphine to really understand the interaction with escalating doses of fentanyl” on respiratory depression, he told this news organization.
 

Two-part, two-period study

In part A, period one of the two-period crossover study, 14 healthy volunteers were randomly assigned to receive for 360 minutes continuous infusion of 0.02 or 0.05 mg/70 kg per hour of buprenorphine to target plasma concentrations of 0.2 or 0.5 ng/mL, respectively, or matching placebo. In the second period, participants received the alternative infusion – either placebo or the active drug.

In part B, eight opioid-tolerant patients who had used high-dose opioids for at least 3 months prior received a higher infusion rate of 0.1, 0.2, or 0.5 mg/70 kg per hour to target plasma concentrations of 1, 2, or 5 ng/mL, respectively.

The 2 ng/mL “is a very important threshold for us” and the result from several previous experiments, Dr. Heidbreder noted. So the investigators targeted that concentration as well as one below and one “much higher” in the current study.

“Because tolerance to opioid effects is poorly characterized in patients receiving long-term opioids, opioid-tolerant participants in part B had a fixed treatment sequence, receiving placebo infusion plus fentanyl challenges in period 1 to optimize the fentanyl dose escalation before buprenorphine and fentanyl were coadministered in period 2,” the investigators reported.

All participants received up to four escalating doses of intravenous fentanyl after reaching target buprenorphine plasma concentrations.

For healthy volunteers, the planned fentanyl doses were 0.075, 0.15, 0.25, and 0.35 mg/70 kg. For the opioid-tolerant patients, the doses were 0.25, 0.35, 0.5, and 0.7 mg/70 kg.

The infusions began after baseline VE had stabilized at 20 plus or minus 2 L/min, which is about four times above normal resting VE.
 

First clinical evidence?

Results showed fentanyl-induced adverse changes in VE were less at higher concentrations of buprenorphine plasma.

Opioid-tolerant patients receiving the 2.0 ng/mL concentration of buprenorphine had a 33.7% decrease in highest dose fentanyl-induced VE versus an 82.3% decrease when receiving placebo.

In addition, fentanyl reduced VE up to 49% (95% confidence interval, 21%-76%) in opioid-tolerant patients in all buprenorphine concentration groups combined versus reducing VE up to 100% (95% CI, 68%-132%) during placebo infusion (P = .006).

In addition, buprenorphine was associated with a lower risk versus placebo for apnea requiring verbal stimulation after fentanyl dosing (odds ratio, 0.07; P = .001).

For the healthy volunteers, the first fentanyl bolus reduced VE by 26% for those at target buprenorphine concentration of 0.5 ng/mL versus 51% when receiving placebo (P = .001). The second bolus reduced VE by 47% versus 79%, respectively (P < .001).

“Discontinuations for apnea limited treatment comparisons beyond the second fentanyl injection,” the investigators reported.

Overall, the findings “provide the first clinical evidence that high sustained plasma concentrations of buprenorphine may protect against respiratory depression induced by potent opioids,” they added.

Additional research is now “warranted to assess the competitive interaction of buprenorphine and fentanyl (as well as other illicitly manufactured fentanyl analogs) as we continue to deepen our understanding of buprenorphine as an evidence-based treatment for patients struggling with opioid use disorder,” Dr. Heidbreder said in a press release.

It’s unclear whether the study’s findings are generalizable to other populations, said Dr. Heidbreder.

“So what we are going to do next is to see what is actually happening in a real world, much broader patient population; and for that we’ll be using [the injectable] Sublocade as the medication of choice,” said Dr. Heidbreder.

“Conceptually, we feel confident about these data, but now we need to demonstrate what is happening in the real world,” he added.

The study was funded by Indivior. Dr. Groeneveld has reported no relevant financial relationships. Dr. Heidbreder is an employee of Indivior.

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

High plasma concentrations of buprenorphine may reduce fentanyl-induced respiratory depression, new research suggests.

The primary endpoint measure in a small “proof of principal” pharmacology study was effect of escalating fentanyl dosing on respiratory depression by way of decreased isohypercapnic minute ventilation (VE) – or volume of gas inhaled or exhaled per minute from the lungs.

sdominick/iStock/Getty Images

Results showed the maximum decrease in highest-dose fentanyl-induced VE was almost 50% less for opioid-tolerant patients receiving a 2.0 ng/mL concentration of steady-state plasma buprenorphine than when receiving matching placebo.

Risk for apnea requiring stimulation after fentanyl dosing was also significantly lower with buprenorphine.

“Even though the study is small, a lot of data were collected which will allow us to very accurately predict which plasma concentrations, and therefore drug doses, are needed to protect people adequately in practice,” study coinvestigator Geert Jan Groeneveld, MD, PhD, neurologist and clinical pharmacologist at the Centre for Human Drug Research, Leiden, the Netherlands, and professor of clinical neuropharmacology at Leiden University Medical Center, told this news organization.

He added the “beautiful results” were in line with what the researchers expected and although further research is needed, the study provides a lot of useful information for clinicians.

“I think this is an approach that works, and this study makes that clear,” Dr. Groeneveld added.

The findings were published online Jan. 27, 2022, in PLoS One.
 

High death rate from synthetic opioids

A recent report from the Centers for Disease Control and Prevention noted that, between June 2020 and June 2021, there were more than 100,000 drug overdose deaths in the United States. Of these, more than 73,000 were attributed to opioids and more than 60,000 to synthetic opioids such as fentanyl.

Most opioid-related overdose deaths in the United States are attributable to synthetic opioids “that can unexpectedly cause respiratory depression by being ingested as a substitute for heroin or with [other] drugs,” Indivior noted in a press release.

Buprenorphine is a partial agonist that “binds with high affinity to mu-opioid receptors but displays partial respiratory depression effects,” the investigators wrote.

As reported by this news organization, the Food and Drug Administration approved buprenorphine extended release (Sublocade, Indivior) in 2017 as the first once-monthly injection for the treatment of opioid use disorder.

In the current study, which was conducted in Leiden, the Netherlands, the investigators used continuous intravenous buprenorphine in order to “mimic” the sustained plasma concentrations of the drug that can be delivered with the long-acting injectable, noted Christian Heidbreder, PhD, chief scientific officer at Indivior.

“This was an experimental medicine study, whereby we used intravenous buprenorphine to really understand the interaction with escalating doses of fentanyl” on respiratory depression, he told this news organization.
 

Two-part, two-period study

In part A, period one of the two-period crossover study, 14 healthy volunteers were randomly assigned to receive for 360 minutes continuous infusion of 0.02 or 0.05 mg/70 kg per hour of buprenorphine to target plasma concentrations of 0.2 or 0.5 ng/mL, respectively, or matching placebo. In the second period, participants received the alternative infusion – either placebo or the active drug.

In part B, eight opioid-tolerant patients who had used high-dose opioids for at least 3 months prior received a higher infusion rate of 0.1, 0.2, or 0.5 mg/70 kg per hour to target plasma concentrations of 1, 2, or 5 ng/mL, respectively.

The 2 ng/mL “is a very important threshold for us” and the result from several previous experiments, Dr. Heidbreder noted. So the investigators targeted that concentration as well as one below and one “much higher” in the current study.

“Because tolerance to opioid effects is poorly characterized in patients receiving long-term opioids, opioid-tolerant participants in part B had a fixed treatment sequence, receiving placebo infusion plus fentanyl challenges in period 1 to optimize the fentanyl dose escalation before buprenorphine and fentanyl were coadministered in period 2,” the investigators reported.

All participants received up to four escalating doses of intravenous fentanyl after reaching target buprenorphine plasma concentrations.

For healthy volunteers, the planned fentanyl doses were 0.075, 0.15, 0.25, and 0.35 mg/70 kg. For the opioid-tolerant patients, the doses were 0.25, 0.35, 0.5, and 0.7 mg/70 kg.

The infusions began after baseline VE had stabilized at 20 plus or minus 2 L/min, which is about four times above normal resting VE.
 

First clinical evidence?

Results showed fentanyl-induced adverse changes in VE were less at higher concentrations of buprenorphine plasma.

Opioid-tolerant patients receiving the 2.0 ng/mL concentration of buprenorphine had a 33.7% decrease in highest dose fentanyl-induced VE versus an 82.3% decrease when receiving placebo.

In addition, fentanyl reduced VE up to 49% (95% confidence interval, 21%-76%) in opioid-tolerant patients in all buprenorphine concentration groups combined versus reducing VE up to 100% (95% CI, 68%-132%) during placebo infusion (P = .006).

In addition, buprenorphine was associated with a lower risk versus placebo for apnea requiring verbal stimulation after fentanyl dosing (odds ratio, 0.07; P = .001).

For the healthy volunteers, the first fentanyl bolus reduced VE by 26% for those at target buprenorphine concentration of 0.5 ng/mL versus 51% when receiving placebo (P = .001). The second bolus reduced VE by 47% versus 79%, respectively (P < .001).

“Discontinuations for apnea limited treatment comparisons beyond the second fentanyl injection,” the investigators reported.

Overall, the findings “provide the first clinical evidence that high sustained plasma concentrations of buprenorphine may protect against respiratory depression induced by potent opioids,” they added.

Additional research is now “warranted to assess the competitive interaction of buprenorphine and fentanyl (as well as other illicitly manufactured fentanyl analogs) as we continue to deepen our understanding of buprenorphine as an evidence-based treatment for patients struggling with opioid use disorder,” Dr. Heidbreder said in a press release.

It’s unclear whether the study’s findings are generalizable to other populations, said Dr. Heidbreder.

“So what we are going to do next is to see what is actually happening in a real world, much broader patient population; and for that we’ll be using [the injectable] Sublocade as the medication of choice,” said Dr. Heidbreder.

“Conceptually, we feel confident about these data, but now we need to demonstrate what is happening in the real world,” he added.

The study was funded by Indivior. Dr. Groeneveld has reported no relevant financial relationships. Dr. Heidbreder is an employee of Indivior.

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

Moderna announced today that its mRNA COVID-19 vaccine has received full Food and Drug Administration approval for adults 18 years and older.

The move lifts an FDA emergency use authorization for the vaccine, which started Dec. 18, 2020.

The Moderna vaccine also now has a new trade name: Spikevax.

The FDA approval comes a little more than 5 months after the agency granted full approval to the Pfizer/BioNTech COVID-19 vaccine on Aug. 23. At the time, the Pfizer vaccine received the trade name Comirnaty.

The FDA approved the Moderna vaccine based on how well it works and its safety for 6 months after a second dose, including follow-up data from a phase 3 study, Moderna announced this morning through a news release. The FDA also announced the news.

Spikevax is the first Moderna product to be fully licensed in the United States.

The United States joins more than 70 other countries where regulators have approved the vaccine. A total of 807 million doses of Moderna’s COVID-19 vaccine were shipped worldwide in 2021, the company reported.

“The full licensure of Spikevax in the U.S. now joins that in Canada, Japan, the European Union, the U.K., Israel, and other countries, where the adolescent indication is also approved,” Stéphane Bancel, Moderna chief executive officer, said in the release.

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

Moderna announced today that its mRNA COVID-19 vaccine has received full Food and Drug Administration approval for adults 18 years and older.

The move lifts an FDA emergency use authorization for the vaccine, which started Dec. 18, 2020.

The Moderna vaccine also now has a new trade name: Spikevax.

The FDA approval comes a little more than 5 months after the agency granted full approval to the Pfizer/BioNTech COVID-19 vaccine on Aug. 23. At the time, the Pfizer vaccine received the trade name Comirnaty.

The FDA approved the Moderna vaccine based on how well it works and its safety for 6 months after a second dose, including follow-up data from a phase 3 study, Moderna announced this morning through a news release. The FDA also announced the news.

Spikevax is the first Moderna product to be fully licensed in the United States.

The United States joins more than 70 other countries where regulators have approved the vaccine. A total of 807 million doses of Moderna’s COVID-19 vaccine were shipped worldwide in 2021, the company reported.

“The full licensure of Spikevax in the U.S. now joins that in Canada, Japan, the European Union, the U.K., Israel, and other countries, where the adolescent indication is also approved,” Stéphane Bancel, Moderna chief executive officer, said in the release.

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

Moderna announced today that its mRNA COVID-19 vaccine has received full Food and Drug Administration approval for adults 18 years and older.

The move lifts an FDA emergency use authorization for the vaccine, which started Dec. 18, 2020.

The Moderna vaccine also now has a new trade name: Spikevax.

The FDA approval comes a little more than 5 months after the agency granted full approval to the Pfizer/BioNTech COVID-19 vaccine on Aug. 23. At the time, the Pfizer vaccine received the trade name Comirnaty.

The FDA approved the Moderna vaccine based on how well it works and its safety for 6 months after a second dose, including follow-up data from a phase 3 study, Moderna announced this morning through a news release. The FDA also announced the news.

Spikevax is the first Moderna product to be fully licensed in the United States.

The United States joins more than 70 other countries where regulators have approved the vaccine. A total of 807 million doses of Moderna’s COVID-19 vaccine were shipped worldwide in 2021, the company reported.

“The full licensure of Spikevax in the U.S. now joins that in Canada, Japan, the European Union, the U.K., Israel, and other countries, where the adolescent indication is also approved,” Stéphane Bancel, Moderna chief executive officer, said in the release.

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

I’m in a crowded commercial kitchen, and everywhere I look I see bottles of colorful drinks and jars holding faded vegetables suspended in brine. The smell of fermented cabbage permeates the room. I open a mason jar, which lets out a loud hiss. I’d spent months researching the gut-brain axis during my PhD, hoping to understand the role that fermented food may play in our mental health. So I enrolled in a class on how to make fermented foods.

The teacher is praising these ancient foods as a magical cure for every ailment you can imagine. I’m uncomfortable – not because of the smell, but because I’ve never found a scientific article that definitively supported this idea. I’m subconsciously applying a fact filter and wondering what the other unsuspecting students must think. I let this slide, since I’m here to learn the art of fermentation. I bravely take a spoonful of sauerkraut. The salty brine overwhelms my senses. Gulp!

If you’ve ever eaten sauerkraut, kimchi, tempeh, kombucha, or kefir, then you’ve had a fermented food (or drink). The first time I gave them a proper go (with a mind open to enjoying them), I noticed the sour, vinegar-like taste and the noticeable absence of sugar. It didn’t take me long to get used to the taste. After a while of drinking my bubbly kombucha, I noticed that my palate had adapted and sweet flavors felt overpowering.

Fermentation is a natural process of curdling or culturing that has been used for thousands of years to preserve foods. Fermented foods and drinks are made through “desired microbial growth and enzymatic conversions of food components” (as opposed to undesirable microbial growth, which happens when your food spoils). Fermented foods are made either by the bacteria and yeast already present in the environment/food material or by introducing bacteria or yeast to help start the fermentation process.

For example, when I made sauerkraut, I shredded the cabbage, added salt, then pummeled and squeezed the cabbage until it released its own juices, which also allowed the “probiotic” lactic acid bacteria in the cabbage to kickstart the fermentation process. Probiotic bacteria like Lactobacillus and Bifidobacterium are considered probiotic good bugs, and are also present in many yogurts and cheeses.

We can’t necessarily call our sauerkraut a “probiotic food” because we don’t know the exact probiotic strains that are in our sauerkraut and whether they are present in the correct “probiotic” dose. It’s also worth noting that foods and drinks that are produced by fermentation don’t necessarily need to have live bacteria in them when you eat them to still be considered a fermented food. For example, sourdough is born from a bubbly live starter culture that contains yeast and bacteria, but once cooked it might no longer have any live bacteria in it.

So, what about the health claims?

Microbial fermentation may interact with health through multiple different biological pathways. It can enhance the nutritional composition of the final food, create bioactive compounds, and change the composition of the gut microbiota (potentially outcompeting harmful pathogens). The lactic acid bacteria in fermented food might also help to influence your immune system and strengthen your intestinal barrier. Some fermented foods, like tempeh, also contain prebiotics; these are fibers that escape your digestion and are broken down by your gut bacteria, including your lactic acid bacteria, which feed off prebiotic fiber to help grow their colonies. In a recent diet experiment, a high-fiber diet was compared with a diet high in fermented foods (eg, yogurt, fermented vegetables, kefir, fermented cheese); those who ate higher fermented food had lower markers of inflammation and an increased diversity of gut microbiota (which is thought to be a good thing in adults). So, in theory, fermented foods sound good.

Still wanting to understand more, and dispel a few myths, a team of researchers and I investigated what’s known about the link between fermented foods and mental health. We looked at the pathways by which fermented foods might affect mental health, such as by reducing inflammation and strengthening the intestinal barrier. These pathways are relevant because they might reduce your brain’s exposure to certain inflammatory molecules that can impact brain function and mental health.

Fermented foods also contain neurotransmitters that are important to mental health. Research about fermented food and mental health is still in its early infancy. Animal studies provide experimental evidence that fermented foods can help with symptoms of depression and anxiety – but that’s in animals. The problem is in knowing how the animal findings relate to our human experience.

We found eight studies in humans that experimented with fermented foods (for example, fermented milk products) to measure their impact on depression, anxiety, and stress in adults, but the studies were all so different that we were unable to make firm conclusions. It is still difficult to know what the active ingredient in fermented foods is. Is it the microbes? Is it the byproducts? Is it the nutrition? And how much of each is needed, and what are safe levels of each? We really need more studies, with detailed descriptions of exactly what is in each food being tested. At this stage, there is not enough human evidence to make firm clinical recommendations for eating fermented food to improve mental health symptoms.

I’ve since moved on from sauerkraut to making sourdough bread as a COVID lockdown project (as this involves a fermented starter culture). When my delicious fresh bread comes out of the oven, my world is paused for a few minutes, and my family mill around to enjoy the warm, fresh bread. While it may be too soon to tell whether fermented foods help our mental health, my sourdough itself has sure helped us.

Dr. Dawson is a nutritionist and bioinformatician research fellow at the Food & Mood Centre at Deakin University, Geelong, Australia. She disclosed no relevant financial relationships.

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

I’m in a crowded commercial kitchen, and everywhere I look I see bottles of colorful drinks and jars holding faded vegetables suspended in brine. The smell of fermented cabbage permeates the room. I open a mason jar, which lets out a loud hiss. I’d spent months researching the gut-brain axis during my PhD, hoping to understand the role that fermented food may play in our mental health. So I enrolled in a class on how to make fermented foods.

The teacher is praising these ancient foods as a magical cure for every ailment you can imagine. I’m uncomfortable – not because of the smell, but because I’ve never found a scientific article that definitively supported this idea. I’m subconsciously applying a fact filter and wondering what the other unsuspecting students must think. I let this slide, since I’m here to learn the art of fermentation. I bravely take a spoonful of sauerkraut. The salty brine overwhelms my senses. Gulp!

If you’ve ever eaten sauerkraut, kimchi, tempeh, kombucha, or kefir, then you’ve had a fermented food (or drink). The first time I gave them a proper go (with a mind open to enjoying them), I noticed the sour, vinegar-like taste and the noticeable absence of sugar. It didn’t take me long to get used to the taste. After a while of drinking my bubbly kombucha, I noticed that my palate had adapted and sweet flavors felt overpowering.

Fermentation is a natural process of curdling or culturing that has been used for thousands of years to preserve foods. Fermented foods and drinks are made through “desired microbial growth and enzymatic conversions of food components” (as opposed to undesirable microbial growth, which happens when your food spoils). Fermented foods are made either by the bacteria and yeast already present in the environment/food material or by introducing bacteria or yeast to help start the fermentation process.

For example, when I made sauerkraut, I shredded the cabbage, added salt, then pummeled and squeezed the cabbage until it released its own juices, which also allowed the “probiotic” lactic acid bacteria in the cabbage to kickstart the fermentation process. Probiotic bacteria like Lactobacillus and Bifidobacterium are considered probiotic good bugs, and are also present in many yogurts and cheeses.

We can’t necessarily call our sauerkraut a “probiotic food” because we don’t know the exact probiotic strains that are in our sauerkraut and whether they are present in the correct “probiotic” dose. It’s also worth noting that foods and drinks that are produced by fermentation don’t necessarily need to have live bacteria in them when you eat them to still be considered a fermented food. For example, sourdough is born from a bubbly live starter culture that contains yeast and bacteria, but once cooked it might no longer have any live bacteria in it.

So, what about the health claims?

Microbial fermentation may interact with health through multiple different biological pathways. It can enhance the nutritional composition of the final food, create bioactive compounds, and change the composition of the gut microbiota (potentially outcompeting harmful pathogens). The lactic acid bacteria in fermented food might also help to influence your immune system and strengthen your intestinal barrier. Some fermented foods, like tempeh, also contain prebiotics; these are fibers that escape your digestion and are broken down by your gut bacteria, including your lactic acid bacteria, which feed off prebiotic fiber to help grow their colonies. In a recent diet experiment, a high-fiber diet was compared with a diet high in fermented foods (eg, yogurt, fermented vegetables, kefir, fermented cheese); those who ate higher fermented food had lower markers of inflammation and an increased diversity of gut microbiota (which is thought to be a good thing in adults). So, in theory, fermented foods sound good.

Still wanting to understand more, and dispel a few myths, a team of researchers and I investigated what’s known about the link between fermented foods and mental health. We looked at the pathways by which fermented foods might affect mental health, such as by reducing inflammation and strengthening the intestinal barrier. These pathways are relevant because they might reduce your brain’s exposure to certain inflammatory molecules that can impact brain function and mental health.

Fermented foods also contain neurotransmitters that are important to mental health. Research about fermented food and mental health is still in its early infancy. Animal studies provide experimental evidence that fermented foods can help with symptoms of depression and anxiety – but that’s in animals. The problem is in knowing how the animal findings relate to our human experience.

We found eight studies in humans that experimented with fermented foods (for example, fermented milk products) to measure their impact on depression, anxiety, and stress in adults, but the studies were all so different that we were unable to make firm conclusions. It is still difficult to know what the active ingredient in fermented foods is. Is it the microbes? Is it the byproducts? Is it the nutrition? And how much of each is needed, and what are safe levels of each? We really need more studies, with detailed descriptions of exactly what is in each food being tested. At this stage, there is not enough human evidence to make firm clinical recommendations for eating fermented food to improve mental health symptoms.

I’ve since moved on from sauerkraut to making sourdough bread as a COVID lockdown project (as this involves a fermented starter culture). When my delicious fresh bread comes out of the oven, my world is paused for a few minutes, and my family mill around to enjoy the warm, fresh bread. While it may be too soon to tell whether fermented foods help our mental health, my sourdough itself has sure helped us.

Dr. Dawson is a nutritionist and bioinformatician research fellow at the Food & Mood Centre at Deakin University, Geelong, Australia. She disclosed no relevant financial relationships.

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

I’m in a crowded commercial kitchen, and everywhere I look I see bottles of colorful drinks and jars holding faded vegetables suspended in brine. The smell of fermented cabbage permeates the room. I open a mason jar, which lets out a loud hiss. I’d spent months researching the gut-brain axis during my PhD, hoping to understand the role that fermented food may play in our mental health. So I enrolled in a class on how to make fermented foods.

The teacher is praising these ancient foods as a magical cure for every ailment you can imagine. I’m uncomfortable – not because of the smell, but because I’ve never found a scientific article that definitively supported this idea. I’m subconsciously applying a fact filter and wondering what the other unsuspecting students must think. I let this slide, since I’m here to learn the art of fermentation. I bravely take a spoonful of sauerkraut. The salty brine overwhelms my senses. Gulp!

If you’ve ever eaten sauerkraut, kimchi, tempeh, kombucha, or kefir, then you’ve had a fermented food (or drink). The first time I gave them a proper go (with a mind open to enjoying them), I noticed the sour, vinegar-like taste and the noticeable absence of sugar. It didn’t take me long to get used to the taste. After a while of drinking my bubbly kombucha, I noticed that my palate had adapted and sweet flavors felt overpowering.

Fermentation is a natural process of curdling or culturing that has been used for thousands of years to preserve foods. Fermented foods and drinks are made through “desired microbial growth and enzymatic conversions of food components” (as opposed to undesirable microbial growth, which happens when your food spoils). Fermented foods are made either by the bacteria and yeast already present in the environment/food material or by introducing bacteria or yeast to help start the fermentation process.

For example, when I made sauerkraut, I shredded the cabbage, added salt, then pummeled and squeezed the cabbage until it released its own juices, which also allowed the “probiotic” lactic acid bacteria in the cabbage to kickstart the fermentation process. Probiotic bacteria like Lactobacillus and Bifidobacterium are considered probiotic good bugs, and are also present in many yogurts and cheeses.

We can’t necessarily call our sauerkraut a “probiotic food” because we don’t know the exact probiotic strains that are in our sauerkraut and whether they are present in the correct “probiotic” dose. It’s also worth noting that foods and drinks that are produced by fermentation don’t necessarily need to have live bacteria in them when you eat them to still be considered a fermented food. For example, sourdough is born from a bubbly live starter culture that contains yeast and bacteria, but once cooked it might no longer have any live bacteria in it.

So, what about the health claims?

Microbial fermentation may interact with health through multiple different biological pathways. It can enhance the nutritional composition of the final food, create bioactive compounds, and change the composition of the gut microbiota (potentially outcompeting harmful pathogens). The lactic acid bacteria in fermented food might also help to influence your immune system and strengthen your intestinal barrier. Some fermented foods, like tempeh, also contain prebiotics; these are fibers that escape your digestion and are broken down by your gut bacteria, including your lactic acid bacteria, which feed off prebiotic fiber to help grow their colonies. In a recent diet experiment, a high-fiber diet was compared with a diet high in fermented foods (eg, yogurt, fermented vegetables, kefir, fermented cheese); those who ate higher fermented food had lower markers of inflammation and an increased diversity of gut microbiota (which is thought to be a good thing in adults). So, in theory, fermented foods sound good.

Still wanting to understand more, and dispel a few myths, a team of researchers and I investigated what’s known about the link between fermented foods and mental health. We looked at the pathways by which fermented foods might affect mental health, such as by reducing inflammation and strengthening the intestinal barrier. These pathways are relevant because they might reduce your brain’s exposure to certain inflammatory molecules that can impact brain function and mental health.

Fermented foods also contain neurotransmitters that are important to mental health. Research about fermented food and mental health is still in its early infancy. Animal studies provide experimental evidence that fermented foods can help with symptoms of depression and anxiety – but that’s in animals. The problem is in knowing how the animal findings relate to our human experience.

We found eight studies in humans that experimented with fermented foods (for example, fermented milk products) to measure their impact on depression, anxiety, and stress in adults, but the studies were all so different that we were unable to make firm conclusions. It is still difficult to know what the active ingredient in fermented foods is. Is it the microbes? Is it the byproducts? Is it the nutrition? And how much of each is needed, and what are safe levels of each? We really need more studies, with detailed descriptions of exactly what is in each food being tested. At this stage, there is not enough human evidence to make firm clinical recommendations for eating fermented food to improve mental health symptoms.

I’ve since moved on from sauerkraut to making sourdough bread as a COVID lockdown project (as this involves a fermented starter culture). When my delicious fresh bread comes out of the oven, my world is paused for a few minutes, and my family mill around to enjoy the warm, fresh bread. While it may be too soon to tell whether fermented foods help our mental health, my sourdough itself has sure helped us.

Dr. Dawson is a nutritionist and bioinformatician research fellow at the Food & Mood Centre at Deakin University, Geelong, Australia. She disclosed no relevant financial relationships.

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