News

SAN DIEGO – Scientists are seeing positive early results from treating relapsed/refractory T-cell blood cancers with un–gene-edited chimeric antigen receptor (CAR) T-cell therapy, a translational immunologist told colleagues at the annual meeting of the Society for Immunotherapy of Cancer. Some patients have had durable complete remission.

As Baylor College of Medicine’s Max Mamonkin, PhD, noted in a presentation, patients with conditions such as T-cell lymphoma and T-cell acute lymphoblastic leukemia (ALL) have limited treatment options and grim prognoses. “This is an area with huge unmet need,” he said. “They don’t have options that patients with B-cell malignancies have, like [CAR T-cell therapy] and bispecifics.”

One big challenge is that CAR-targeted antigens in T-cell blood cancers are shared by both normal and malignant T-cells, he said. That poses a risk during therapy that the engineered cells will target each other with “disastrous consequences.”

Research by his team and others have shown that gene editing can help the cells to stop engaging in “fratricide,” Dr. Mamonkin said.

The problem is “it’s much easier to do gene editing on the bench and much harder to translate it into the clinic,” especially in light of limitations posed by the Food and Drug administration, he said. “We started to think about alternative methods to get this approach to the clinic.”

One strategy is to use pharmacologic inhibition via the Bruton’s tyrosine kinase inhibitors ibrutinib and dasatinib to mute the tendency of CAR T toward self-destruction. When tested in mice, “the unedited cells not just persisted, they expanded with sustained anti-leukemic activity and significantly prolonged their lives even more than the knock-out [gene-edited] cells.”

The research has now moved to human subjects. In 2021, researchers at Texas Children’s Hospital and Houston Methodist Hospital launched a clinical trial to test CD7 CAR T-cell therapy with CD28 in 21 patients with CD7-positive T-cell lymphoma. The initial part of the transplant-enabling CRIMSON-NE study is expected to be completed by mid-2024, and patients will be followed for 15 years.

Early results show that CD7 CAR T-cells have persisted in the blood of patients over weeks and months, Dr. Mamonkin said. In eight patients, “we’re seeing good evidence of activity,” with two patients reaching complete remissions.

The findings suggest that CD7 can be targeted in T-cell malignancies, he said. What about CD5? A similar study known as MAGENTA is testing CD5 CAR T-cell therapy with CD28 in T-cell leukemia and lymphoma in 42 patients. The phase 1 trial began in 2017. It’s expected to be completed by 2024 and to track patients for 15 years.

Results so far have been positive with complete remission achieved in three of nine patients with T-cell lymphoma; two remained in remission for more than 4 years.

Results in T-cell ALL improved after researchers adjusted the manufacturing of the cells. As for durability in these patients, “we try to bridge them to transplantation as soon as possible.”

As for side effects overall, there wasn’t much immune effector cell-associated neurotoxicity syndrome, and the CD7 approach seems to be more inflammatory, he said.

The presentation didn’t address the potential cost of the therapies. CAR T-cell therapy can cost between $500,000 and $1 million. Medicare covers it, but Medicaid may not depending on the state, and insurers may refuse to pay for it.

Dr. Mamonkin disclosed ties with Allogene, Amgen, Fate, Galapagos, March Bio, and NKILT.

SAN DIEGO – Scientists are seeing positive early results from treating relapsed/refractory T-cell blood cancers with un–gene-edited chimeric antigen receptor (CAR) T-cell therapy, a translational immunologist told colleagues at the annual meeting of the Society for Immunotherapy of Cancer. Some patients have had durable complete remission.

As Baylor College of Medicine’s Max Mamonkin, PhD, noted in a presentation, patients with conditions such as T-cell lymphoma and T-cell acute lymphoblastic leukemia (ALL) have limited treatment options and grim prognoses. “This is an area with huge unmet need,” he said. “They don’t have options that patients with B-cell malignancies have, like [CAR T-cell therapy] and bispecifics.”

One big challenge is that CAR-targeted antigens in T-cell blood cancers are shared by both normal and malignant T-cells, he said. That poses a risk during therapy that the engineered cells will target each other with “disastrous consequences.”

Research by his team and others have shown that gene editing can help the cells to stop engaging in “fratricide,” Dr. Mamonkin said.

The problem is “it’s much easier to do gene editing on the bench and much harder to translate it into the clinic,” especially in light of limitations posed by the Food and Drug administration, he said. “We started to think about alternative methods to get this approach to the clinic.”

One strategy is to use pharmacologic inhibition via the Bruton’s tyrosine kinase inhibitors ibrutinib and dasatinib to mute the tendency of CAR T toward self-destruction. When tested in mice, “the unedited cells not just persisted, they expanded with sustained anti-leukemic activity and significantly prolonged their lives even more than the knock-out [gene-edited] cells.”

The research has now moved to human subjects. In 2021, researchers at Texas Children’s Hospital and Houston Methodist Hospital launched a clinical trial to test CD7 CAR T-cell therapy with CD28 in 21 patients with CD7-positive T-cell lymphoma. The initial part of the transplant-enabling CRIMSON-NE study is expected to be completed by mid-2024, and patients will be followed for 15 years.

Early results show that CD7 CAR T-cells have persisted in the blood of patients over weeks and months, Dr. Mamonkin said. In eight patients, “we’re seeing good evidence of activity,” with two patients reaching complete remissions.

The findings suggest that CD7 can be targeted in T-cell malignancies, he said. What about CD5? A similar study known as MAGENTA is testing CD5 CAR T-cell therapy with CD28 in T-cell leukemia and lymphoma in 42 patients. The phase 1 trial began in 2017. It’s expected to be completed by 2024 and to track patients for 15 years.

Results so far have been positive with complete remission achieved in three of nine patients with T-cell lymphoma; two remained in remission for more than 4 years.

Results in T-cell ALL improved after researchers adjusted the manufacturing of the cells. As for durability in these patients, “we try to bridge them to transplantation as soon as possible.”

As for side effects overall, there wasn’t much immune effector cell-associated neurotoxicity syndrome, and the CD7 approach seems to be more inflammatory, he said.

The presentation didn’t address the potential cost of the therapies. CAR T-cell therapy can cost between $500,000 and $1 million. Medicare covers it, but Medicaid may not depending on the state, and insurers may refuse to pay for it.

Dr. Mamonkin disclosed ties with Allogene, Amgen, Fate, Galapagos, March Bio, and NKILT.

SAN DIEGO – Scientists are seeing positive early results from treating relapsed/refractory T-cell blood cancers with un–gene-edited chimeric antigen receptor (CAR) T-cell therapy, a translational immunologist told colleagues at the annual meeting of the Society for Immunotherapy of Cancer. Some patients have had durable complete remission.

As Baylor College of Medicine’s Max Mamonkin, PhD, noted in a presentation, patients with conditions such as T-cell lymphoma and T-cell acute lymphoblastic leukemia (ALL) have limited treatment options and grim prognoses. “This is an area with huge unmet need,” he said. “They don’t have options that patients with B-cell malignancies have, like [CAR T-cell therapy] and bispecifics.”

One big challenge is that CAR-targeted antigens in T-cell blood cancers are shared by both normal and malignant T-cells, he said. That poses a risk during therapy that the engineered cells will target each other with “disastrous consequences.”

Research by his team and others have shown that gene editing can help the cells to stop engaging in “fratricide,” Dr. Mamonkin said.

The problem is “it’s much easier to do gene editing on the bench and much harder to translate it into the clinic,” especially in light of limitations posed by the Food and Drug administration, he said. “We started to think about alternative methods to get this approach to the clinic.”

One strategy is to use pharmacologic inhibition via the Bruton’s tyrosine kinase inhibitors ibrutinib and dasatinib to mute the tendency of CAR T toward self-destruction. When tested in mice, “the unedited cells not just persisted, they expanded with sustained anti-leukemic activity and significantly prolonged their lives even more than the knock-out [gene-edited] cells.”

The research has now moved to human subjects. In 2021, researchers at Texas Children’s Hospital and Houston Methodist Hospital launched a clinical trial to test CD7 CAR T-cell therapy with CD28 in 21 patients with CD7-positive T-cell lymphoma. The initial part of the transplant-enabling CRIMSON-NE study is expected to be completed by mid-2024, and patients will be followed for 15 years.

Early results show that CD7 CAR T-cells have persisted in the blood of patients over weeks and months, Dr. Mamonkin said. In eight patients, “we’re seeing good evidence of activity,” with two patients reaching complete remissions.

The findings suggest that CD7 can be targeted in T-cell malignancies, he said. What about CD5? A similar study known as MAGENTA is testing CD5 CAR T-cell therapy with CD28 in T-cell leukemia and lymphoma in 42 patients. The phase 1 trial began in 2017. It’s expected to be completed by 2024 and to track patients for 15 years.

Results so far have been positive with complete remission achieved in three of nine patients with T-cell lymphoma; two remained in remission for more than 4 years.

Results in T-cell ALL improved after researchers adjusted the manufacturing of the cells. As for durability in these patients, “we try to bridge them to transplantation as soon as possible.”

As for side effects overall, there wasn’t much immune effector cell-associated neurotoxicity syndrome, and the CD7 approach seems to be more inflammatory, he said.

The presentation didn’t address the potential cost of the therapies. CAR T-cell therapy can cost between $500,000 and $1 million. Medicare covers it, but Medicaid may not depending on the state, and insurers may refuse to pay for it.

Dr. Mamonkin disclosed ties with Allogene, Amgen, Fate, Galapagos, March Bio, and NKILT.

The American Heart Association (AHA) has now formally voted to join several other cardiovascular societies to form a new professional certification board for cardiovascular medicine, to be known as the American Board of Cardiovascular Medicine (ABCVM).  

The ABCVM would be independent of the American Board of Internal Medicine (ABIM), the current organization providing maintenance of certification for cardiologists along with 20 other internal medicine subspecialties. The ABIM’s maintenance of certification process has been widely criticized for many years and has been described as “needlessly burdensome and expensive.”

The AHA will be joining the American College of Cardiology (ACC), Heart Failure Society of America (HFSA), Heart Rhythm Society (HRS), and Society for Cardiovascular Angiography & Interventions (SCAI) in forming the ABCVM. 

These four other societies issued a joint statement in September saying that they will apply to the American Board of Medical Specialties (ABMS) to request an independent cardiology board that follows a “new competency-based approach to continuous certification — one that harnesses the knowledge, skills, and attitudes required to sustain professional excellence and care for cardiovascular patients effectively.”

The new board requirements will “de-emphasize timed, high stakes performance exams in the continuous certification process and instead will focus on learning assessments to identify gaps in current knowledge or skills,” the statement noted.

At the time the September statement was issued, the AHA was said to be supportive of the move but was waiting for formal endorsement to join the effort by its board of directors.

That has now happened, with the AHA’s national board of directors voting to provide “full support” for the creation of the proposed ABCVM.

“We enthusiastically join with our colleagues in proposing a new professional certification body to accredit cardiovascular professionals called the American Board of Cardiovascular Medicine,” said the association’s volunteer president Joseph C. Wu, MD. “The new ABCVM will be independent of the ABIM and focus on the specific competency-based trainings and appropriate ongoing certifications that align with and strengthen skills for cardiovascular physicians and enhance quality of care for people with cardiovascular disease,” Wu said.

“The AHA joins the consortium to submit the application to the American Board of Medical Specialties (ABMS) requesting an independent medical board for cardiovascular medicine. The consortium’s robust proposal harnesses the knowledge, skills, and benchmarks appropriate for professional excellence and delivery of effective, high-quality cardiovascular care,” Wu added.

The leaders of the ABCVM will include professional representatives from the consortium of member organizations, with a specific focus on relevant education, trainings, and supports that recognize the increasing specialization in cardiology and the latest advances in the various subspecialties of cardiovascular medicine, the AHA notes in a statement.

Professional certification by ABIM is a condition of employment for physicians practicing in large hospitals or health systems. A dedicated certification board separate from ABIM will help to ensure that cardiovascular professionals are maintaining the expertise appropriate to high-quality care and improved outcomes for their patients, the AHA said.

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

The American Heart Association (AHA) has now formally voted to join several other cardiovascular societies to form a new professional certification board for cardiovascular medicine, to be known as the American Board of Cardiovascular Medicine (ABCVM).  

The ABCVM would be independent of the American Board of Internal Medicine (ABIM), the current organization providing maintenance of certification for cardiologists along with 20 other internal medicine subspecialties. The ABIM’s maintenance of certification process has been widely criticized for many years and has been described as “needlessly burdensome and expensive.”

The AHA will be joining the American College of Cardiology (ACC), Heart Failure Society of America (HFSA), Heart Rhythm Society (HRS), and Society for Cardiovascular Angiography & Interventions (SCAI) in forming the ABCVM. 

These four other societies issued a joint statement in September saying that they will apply to the American Board of Medical Specialties (ABMS) to request an independent cardiology board that follows a “new competency-based approach to continuous certification — one that harnesses the knowledge, skills, and attitudes required to sustain professional excellence and care for cardiovascular patients effectively.”

The new board requirements will “de-emphasize timed, high stakes performance exams in the continuous certification process and instead will focus on learning assessments to identify gaps in current knowledge or skills,” the statement noted.

At the time the September statement was issued, the AHA was said to be supportive of the move but was waiting for formal endorsement to join the effort by its board of directors.

That has now happened, with the AHA’s national board of directors voting to provide “full support” for the creation of the proposed ABCVM.

“We enthusiastically join with our colleagues in proposing a new professional certification body to accredit cardiovascular professionals called the American Board of Cardiovascular Medicine,” said the association’s volunteer president Joseph C. Wu, MD. “The new ABCVM will be independent of the ABIM and focus on the specific competency-based trainings and appropriate ongoing certifications that align with and strengthen skills for cardiovascular physicians and enhance quality of care for people with cardiovascular disease,” Wu said.

“The AHA joins the consortium to submit the application to the American Board of Medical Specialties (ABMS) requesting an independent medical board for cardiovascular medicine. The consortium’s robust proposal harnesses the knowledge, skills, and benchmarks appropriate for professional excellence and delivery of effective, high-quality cardiovascular care,” Wu added.

The leaders of the ABCVM will include professional representatives from the consortium of member organizations, with a specific focus on relevant education, trainings, and supports that recognize the increasing specialization in cardiology and the latest advances in the various subspecialties of cardiovascular medicine, the AHA notes in a statement.

Professional certification by ABIM is a condition of employment for physicians practicing in large hospitals or health systems. A dedicated certification board separate from ABIM will help to ensure that cardiovascular professionals are maintaining the expertise appropriate to high-quality care and improved outcomes for their patients, the AHA said.

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

The American Heart Association (AHA) has now formally voted to join several other cardiovascular societies to form a new professional certification board for cardiovascular medicine, to be known as the American Board of Cardiovascular Medicine (ABCVM).  

The ABCVM would be independent of the American Board of Internal Medicine (ABIM), the current organization providing maintenance of certification for cardiologists along with 20 other internal medicine subspecialties. The ABIM’s maintenance of certification process has been widely criticized for many years and has been described as “needlessly burdensome and expensive.”

The AHA will be joining the American College of Cardiology (ACC), Heart Failure Society of America (HFSA), Heart Rhythm Society (HRS), and Society for Cardiovascular Angiography & Interventions (SCAI) in forming the ABCVM. 

These four other societies issued a joint statement in September saying that they will apply to the American Board of Medical Specialties (ABMS) to request an independent cardiology board that follows a “new competency-based approach to continuous certification — one that harnesses the knowledge, skills, and attitudes required to sustain professional excellence and care for cardiovascular patients effectively.”

The new board requirements will “de-emphasize timed, high stakes performance exams in the continuous certification process and instead will focus on learning assessments to identify gaps in current knowledge or skills,” the statement noted.

At the time the September statement was issued, the AHA was said to be supportive of the move but was waiting for formal endorsement to join the effort by its board of directors.

That has now happened, with the AHA’s national board of directors voting to provide “full support” for the creation of the proposed ABCVM.

“We enthusiastically join with our colleagues in proposing a new professional certification body to accredit cardiovascular professionals called the American Board of Cardiovascular Medicine,” said the association’s volunteer president Joseph C. Wu, MD. “The new ABCVM will be independent of the ABIM and focus on the specific competency-based trainings and appropriate ongoing certifications that align with and strengthen skills for cardiovascular physicians and enhance quality of care for people with cardiovascular disease,” Wu said.

“The AHA joins the consortium to submit the application to the American Board of Medical Specialties (ABMS) requesting an independent medical board for cardiovascular medicine. The consortium’s robust proposal harnesses the knowledge, skills, and benchmarks appropriate for professional excellence and delivery of effective, high-quality cardiovascular care,” Wu added.

The leaders of the ABCVM will include professional representatives from the consortium of member organizations, with a specific focus on relevant education, trainings, and supports that recognize the increasing specialization in cardiology and the latest advances in the various subspecialties of cardiovascular medicine, the AHA notes in a statement.

Professional certification by ABIM is a condition of employment for physicians practicing in large hospitals or health systems. A dedicated certification board separate from ABIM will help to ensure that cardiovascular professionals are maintaining the expertise appropriate to high-quality care and improved outcomes for their patients, the AHA said.

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

TOPLINE:

Patients with breast cancer who have low levels of vitamin D when they begin treatment with paclitaxel are more likely to develop peripheral neuropathy, suggesting that correcting levels before treatment might help prevent the condition.

METHODOLOGY:

• Past studies have suggested an association between vitamin D insufficiency and paclitaxel-induced peripheral neuropathy, a largely untreatable and sometimes permanent side effect of chemotherapy.
• To confirm the association, investigators reviewed data and samples from 1,191 women in the phase 3 SWOG S0221 trial, which compared weekly and biweekly paclitaxel regimens for early-stage breast cancer.
• Using serum samples collected at baseline, the team evaluated the relationship between insufficient vitamin D levels (20 ng/mL or less) before treatment and grade 3 or higher sensory chemotherapy-induced peripheral neuropathy.

TAKEAWAY:

• Overall, 33.3% of the women had insufficient vitamin D levels at baseline, and 16.4% developed grade 3 or worse sensory chemotherapy-induced peripheral neuropathy.
• The incidence of peripheral neuropathy of grade 3 or greater was higher among patients with pretreatment vitamin D insufficiency (20.7% vs. 14.2%; odds ratio, 1.57; P = .005).
• The association grew stronger after adjusting for age and paclitaxel schedule (adjusted OR, 1.65; P = .003), but not after adjusting for race (adjusted OR, 1.39; P = .066).

IN PRACTICE:

The study “confirms that patients with pretreatment vitamin D insufficiency have a higher incidence of [chemotherapy-induced peripheral neuropathy],” the authors concluded. These results also “suggest that vitamin D supplementation in patients with lower levels of vitamin D may reduce peripheral neuropathy, and particularly high-grade peripheral neuropathy, which would improve these patients’ long-term quality of life,” senior researcher Daniel L. Hertz, PharmD, PhD, University of Michigan College of Pharmacy, Ann Arbor, said in a press release.

SOURCE:

The study, led by Ciao-Sin Chen, PharmD, of the University of Michigan, Ann Arbor, was published in the Journal of the National Comprehensive Cancer Network.

LIMITATIONS:

The trial did not collect data on other peripheral neuropathy risk factors, including preexisting peripheral neuropathy and diabetes. The study included a limited number of non-White participants (16%); larger numbers are needed to elucidate a potential interplay between race, vitamin D, and chemotherapy-induced peripheral neuropathy. The researchers also did not collect data on grade 1 and 2 chemotherapy-induced peripheral neuropathy.

DISCLOSURES:

The study was funded by Amgen, the American Cancer Society, and others. The investigators disclosed no relevant financial relationships.

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

TOPLINE:

Patients with breast cancer who have low levels of vitamin D when they begin treatment with paclitaxel are more likely to develop peripheral neuropathy, suggesting that correcting levels before treatment might help prevent the condition.

METHODOLOGY:

• Past studies have suggested an association between vitamin D insufficiency and paclitaxel-induced peripheral neuropathy, a largely untreatable and sometimes permanent side effect of chemotherapy.
• To confirm the association, investigators reviewed data and samples from 1,191 women in the phase 3 SWOG S0221 trial, which compared weekly and biweekly paclitaxel regimens for early-stage breast cancer.
• Using serum samples collected at baseline, the team evaluated the relationship between insufficient vitamin D levels (20 ng/mL or less) before treatment and grade 3 or higher sensory chemotherapy-induced peripheral neuropathy.

TAKEAWAY:

• Overall, 33.3% of the women had insufficient vitamin D levels at baseline, and 16.4% developed grade 3 or worse sensory chemotherapy-induced peripheral neuropathy.
• The incidence of peripheral neuropathy of grade 3 or greater was higher among patients with pretreatment vitamin D insufficiency (20.7% vs. 14.2%; odds ratio, 1.57; P = .005).
• The association grew stronger after adjusting for age and paclitaxel schedule (adjusted OR, 1.65; P = .003), but not after adjusting for race (adjusted OR, 1.39; P = .066).

IN PRACTICE:

The study “confirms that patients with pretreatment vitamin D insufficiency have a higher incidence of [chemotherapy-induced peripheral neuropathy],” the authors concluded. These results also “suggest that vitamin D supplementation in patients with lower levels of vitamin D may reduce peripheral neuropathy, and particularly high-grade peripheral neuropathy, which would improve these patients’ long-term quality of life,” senior researcher Daniel L. Hertz, PharmD, PhD, University of Michigan College of Pharmacy, Ann Arbor, said in a press release.

SOURCE:

The study, led by Ciao-Sin Chen, PharmD, of the University of Michigan, Ann Arbor, was published in the Journal of the National Comprehensive Cancer Network.

LIMITATIONS:

The trial did not collect data on other peripheral neuropathy risk factors, including preexisting peripheral neuropathy and diabetes. The study included a limited number of non-White participants (16%); larger numbers are needed to elucidate a potential interplay between race, vitamin D, and chemotherapy-induced peripheral neuropathy. The researchers also did not collect data on grade 1 and 2 chemotherapy-induced peripheral neuropathy.

DISCLOSURES:

The study was funded by Amgen, the American Cancer Society, and others. The investigators disclosed no relevant financial relationships.

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

TOPLINE:

Patients with breast cancer who have low levels of vitamin D when they begin treatment with paclitaxel are more likely to develop peripheral neuropathy, suggesting that correcting levels before treatment might help prevent the condition.

METHODOLOGY:

• Past studies have suggested an association between vitamin D insufficiency and paclitaxel-induced peripheral neuropathy, a largely untreatable and sometimes permanent side effect of chemotherapy.
• To confirm the association, investigators reviewed data and samples from 1,191 women in the phase 3 SWOG S0221 trial, which compared weekly and biweekly paclitaxel regimens for early-stage breast cancer.
• Using serum samples collected at baseline, the team evaluated the relationship between insufficient vitamin D levels (20 ng/mL or less) before treatment and grade 3 or higher sensory chemotherapy-induced peripheral neuropathy.

TAKEAWAY:

• Overall, 33.3% of the women had insufficient vitamin D levels at baseline, and 16.4% developed grade 3 or worse sensory chemotherapy-induced peripheral neuropathy.
• The incidence of peripheral neuropathy of grade 3 or greater was higher among patients with pretreatment vitamin D insufficiency (20.7% vs. 14.2%; odds ratio, 1.57; P = .005).
• The association grew stronger after adjusting for age and paclitaxel schedule (adjusted OR, 1.65; P = .003), but not after adjusting for race (adjusted OR, 1.39; P = .066).

IN PRACTICE:

The study “confirms that patients with pretreatment vitamin D insufficiency have a higher incidence of [chemotherapy-induced peripheral neuropathy],” the authors concluded. These results also “suggest that vitamin D supplementation in patients with lower levels of vitamin D may reduce peripheral neuropathy, and particularly high-grade peripheral neuropathy, which would improve these patients’ long-term quality of life,” senior researcher Daniel L. Hertz, PharmD, PhD, University of Michigan College of Pharmacy, Ann Arbor, said in a press release.

SOURCE:

The study, led by Ciao-Sin Chen, PharmD, of the University of Michigan, Ann Arbor, was published in the Journal of the National Comprehensive Cancer Network.

LIMITATIONS:

The trial did not collect data on other peripheral neuropathy risk factors, including preexisting peripheral neuropathy and diabetes. The study included a limited number of non-White participants (16%); larger numbers are needed to elucidate a potential interplay between race, vitamin D, and chemotherapy-induced peripheral neuropathy. The researchers also did not collect data on grade 1 and 2 chemotherapy-induced peripheral neuropathy.

DISCLOSURES:

The study was funded by Amgen, the American Cancer Society, and others. The investigators disclosed no relevant financial relationships.

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

Epilepsy affects over 50 million people worldwide, making it one of the most common neurologic disorders. Though current antiseizure medications can control seizures in two-thirds of patients, drug-resistant epilepsy remains a major challenge for the remaining one-third, as does the lack of disease-modifying therapies.

But RNA-based therapeutics offer new hope, and experts predict they could fill these gaps and revolutionize epilepsy treatment.

“Current medicines for epilepsy are barely scraping the surface of what could be targeted. RNA therapeutics is going to change everything. It opens up entirely new targets – virtually anything in our genome becomes ‘druggable,’ ” said David Henshall, PhD, Royal College of Surgeons Ireland, Dublin.

Edward Kaye, MD, a pediatric neurologist and CEO of Stoke Therapeutics, agrees. “RNA therapeutics open up possibilities that could not have been imagined when I started my career,” he said in an interview.

“We now have the potential to change the way genetic epilepsies are treated by addressing the underlying genetic cause of the disease instead of just the seizures,” Dr. Kaye said.
 

Thank COVID?

Henrik Klitgaard, PhD, and Sakari Kauppinen, PhD, scientific co-founders of NEUmiRNA Therapeutics, noted that the success of messenger RNA (mRNA) vaccines to counter the COVID-19 pandemic has fueled interest in exploring the potential of RNA-based therapies as a new modality in epilepsy with improved therapeutic properties.

Dr. Klitgaard and Dr. Kauppinen recently co-authored a “critical review” on RNA therapies for epilepsy published online in Epilepsia.

Unlike current antiseizure medications, which only target ion channels and receptors, RNA therapeutics can directly intervene at the genetic level.

RNA drugs can be targeted toward noncoding RNAs, such as microRNAs, or toward mRNA. Targeting noncoding RNAs shows promise in sporadic, nongenetic epilepsies, and targeting of mRNAs shows promise in childhood monogenic epilepsies.

Preclinical studies have highlighted the potential of RNA therapies for treatment of epilepsy.

“At NEUmiRNA Therapeutics, we have successfully designed potent and selective RNA drugs for a novel disease target that enable unprecedented elimination of the drug resistance and chronic epilepsy in a preclinical model mimicking temporal lobe epilepsy,” said Dr. Klitgaard.

“Interestingly,” he said, “these experiments also showed a disappearance of symptoms for epilepsy that outlasted drug exposure, suggesting significant disease-modifying properties with a curative potential for epilepsy.”
 

Hope for Dravet syndrome

Currently, there is significant interest in development of antisense oligonucleotides (ASOs), particularly for Dravet syndrome, a rare genetic epileptic encephalopathy that begins in infancy and gives rise to seizures that don’t respond well to seizure medications.

Stoke Therapeutics is developing antisense therapies aimed at correcting mutations in sodium channel genes, which cause up to 80% of cases of Dravet syndrome.

The company recently reported positive safety and efficacy data from patients treated with STK-001, a proprietary ASO, in the two ongoing phase 1/2a studies (MONARCH and ADMIRAL) and the SWALLOWTAIL open-label extension study.

“These new data suggest clinical benefit for patients 2-18 years of age treated with multiple doses of STK-001. The observed reductions in convulsive seizure frequency as well as substantial improvements in cognition and behavior support the potential for disease modification in a highly refractory patient population,” the company said in a news release.

Dr. Kaye noted that the company anticipates reporting additional data in the first quarter of 2024 and expects to provide an update on phase 3 planning in the first half of 2024.

“Twenty-five years ago, when I was caring for patients in my clinic, half of epilepsy was considered idiopathic because we didn’t know the cause,” Dr. Kaye commented.

“Since then, thanks to an understanding of the genetics and more widely available access to genetic testing, we can determine the root cause of most of them. Today, I believe we are on the verge of a fundamental shift in how we approach the treatment of Dravet syndrome and, hopefully, other genetic epilepsies,” said Dr. Kaye.

“We are now finally getting to the point that we not only know the causes, but we are in a position to develop medicines that target those causes. We have seen this happen in other diseases like cystic fibrosis, and the time has come for genetic epilepsies,” he added.
 

A promising future

Dr. Henshall said that the ability to target the cause rather than just the symptoms of epilepsy “offers the promise of disease-modifying and potentially curative medicines in the future.”

And what’s exciting is that the time frame of developing RNA medicines may be “radically” different than it is for traditional small-drug development, he noted.

Take, for example, a case reported recently in the New England Journal of Medicine.

Researchers identified a novel mutation in a child with neuronal ceroid lipofuscinosis 7 (a form of Batten’s disease), a rare and fatal neurodegenerative disease. Identification of the mutation was followed by the development and use (within 1 year) of a tailored RNA drug to treat the patient.

One downside perhaps is that current RNA drugs for epilepsy are delivered intrathecally, which is different from oral administration of small-molecule drugs.

However, Dr. Kauppinen from NEUmiRNA Therapeutics noted that “advances in intrathecal delivery technologies [and] the frequent use of this route of administration in other diseases and IT administration only being required two to three times per year will certainly facilitate use of RNA medicines.”

“This will also eliminate the issue of drug adherence by ensuring full patient compliance to treatment,” Dr. Kauppinen said.

The review article on RNA therapies in epilepsy had no commercial funding. Dr. Henshall holds a patent and has filed intellectual property related to microRNA targeting therapies for epilepsy and has received funding for microRNA research from NEUmiRNA Therapeutics. Dr. Klitgaard and Dr. Kauppinen are cofounders of NEUmiRNA Therapeutics. Dr. Kaye is CEO of Stoke Therapeutics.

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

Epilepsy affects over 50 million people worldwide, making it one of the most common neurologic disorders. Though current antiseizure medications can control seizures in two-thirds of patients, drug-resistant epilepsy remains a major challenge for the remaining one-third, as does the lack of disease-modifying therapies.

But RNA-based therapeutics offer new hope, and experts predict they could fill these gaps and revolutionize epilepsy treatment.

“Current medicines for epilepsy are barely scraping the surface of what could be targeted. RNA therapeutics is going to change everything. It opens up entirely new targets – virtually anything in our genome becomes ‘druggable,’ ” said David Henshall, PhD, Royal College of Surgeons Ireland, Dublin.

Edward Kaye, MD, a pediatric neurologist and CEO of Stoke Therapeutics, agrees. “RNA therapeutics open up possibilities that could not have been imagined when I started my career,” he said in an interview.

“We now have the potential to change the way genetic epilepsies are treated by addressing the underlying genetic cause of the disease instead of just the seizures,” Dr. Kaye said.
 

Thank COVID?

Henrik Klitgaard, PhD, and Sakari Kauppinen, PhD, scientific co-founders of NEUmiRNA Therapeutics, noted that the success of messenger RNA (mRNA) vaccines to counter the COVID-19 pandemic has fueled interest in exploring the potential of RNA-based therapies as a new modality in epilepsy with improved therapeutic properties.

Dr. Klitgaard and Dr. Kauppinen recently co-authored a “critical review” on RNA therapies for epilepsy published online in Epilepsia.

Unlike current antiseizure medications, which only target ion channels and receptors, RNA therapeutics can directly intervene at the genetic level.

RNA drugs can be targeted toward noncoding RNAs, such as microRNAs, or toward mRNA. Targeting noncoding RNAs shows promise in sporadic, nongenetic epilepsies, and targeting of mRNAs shows promise in childhood monogenic epilepsies.

Preclinical studies have highlighted the potential of RNA therapies for treatment of epilepsy.

“At NEUmiRNA Therapeutics, we have successfully designed potent and selective RNA drugs for a novel disease target that enable unprecedented elimination of the drug resistance and chronic epilepsy in a preclinical model mimicking temporal lobe epilepsy,” said Dr. Klitgaard.

“Interestingly,” he said, “these experiments also showed a disappearance of symptoms for epilepsy that outlasted drug exposure, suggesting significant disease-modifying properties with a curative potential for epilepsy.”
 

Hope for Dravet syndrome

Currently, there is significant interest in development of antisense oligonucleotides (ASOs), particularly for Dravet syndrome, a rare genetic epileptic encephalopathy that begins in infancy and gives rise to seizures that don’t respond well to seizure medications.

Stoke Therapeutics is developing antisense therapies aimed at correcting mutations in sodium channel genes, which cause up to 80% of cases of Dravet syndrome.

The company recently reported positive safety and efficacy data from patients treated with STK-001, a proprietary ASO, in the two ongoing phase 1/2a studies (MONARCH and ADMIRAL) and the SWALLOWTAIL open-label extension study.

“These new data suggest clinical benefit for patients 2-18 years of age treated with multiple doses of STK-001. The observed reductions in convulsive seizure frequency as well as substantial improvements in cognition and behavior support the potential for disease modification in a highly refractory patient population,” the company said in a news release.

Dr. Kaye noted that the company anticipates reporting additional data in the first quarter of 2024 and expects to provide an update on phase 3 planning in the first half of 2024.

“Twenty-five years ago, when I was caring for patients in my clinic, half of epilepsy was considered idiopathic because we didn’t know the cause,” Dr. Kaye commented.

“Since then, thanks to an understanding of the genetics and more widely available access to genetic testing, we can determine the root cause of most of them. Today, I believe we are on the verge of a fundamental shift in how we approach the treatment of Dravet syndrome and, hopefully, other genetic epilepsies,” said Dr. Kaye.

“We are now finally getting to the point that we not only know the causes, but we are in a position to develop medicines that target those causes. We have seen this happen in other diseases like cystic fibrosis, and the time has come for genetic epilepsies,” he added.
 

A promising future

Dr. Henshall said that the ability to target the cause rather than just the symptoms of epilepsy “offers the promise of disease-modifying and potentially curative medicines in the future.”

And what’s exciting is that the time frame of developing RNA medicines may be “radically” different than it is for traditional small-drug development, he noted.

Take, for example, a case reported recently in the New England Journal of Medicine.

Researchers identified a novel mutation in a child with neuronal ceroid lipofuscinosis 7 (a form of Batten’s disease), a rare and fatal neurodegenerative disease. Identification of the mutation was followed by the development and use (within 1 year) of a tailored RNA drug to treat the patient.

One downside perhaps is that current RNA drugs for epilepsy are delivered intrathecally, which is different from oral administration of small-molecule drugs.

However, Dr. Kauppinen from NEUmiRNA Therapeutics noted that “advances in intrathecal delivery technologies [and] the frequent use of this route of administration in other diseases and IT administration only being required two to three times per year will certainly facilitate use of RNA medicines.”

“This will also eliminate the issue of drug adherence by ensuring full patient compliance to treatment,” Dr. Kauppinen said.

The review article on RNA therapies in epilepsy had no commercial funding. Dr. Henshall holds a patent and has filed intellectual property related to microRNA targeting therapies for epilepsy and has received funding for microRNA research from NEUmiRNA Therapeutics. Dr. Klitgaard and Dr. Kauppinen are cofounders of NEUmiRNA Therapeutics. Dr. Kaye is CEO of Stoke Therapeutics.

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

Epilepsy affects over 50 million people worldwide, making it one of the most common neurologic disorders. Though current antiseizure medications can control seizures in two-thirds of patients, drug-resistant epilepsy remains a major challenge for the remaining one-third, as does the lack of disease-modifying therapies.

But RNA-based therapeutics offer new hope, and experts predict they could fill these gaps and revolutionize epilepsy treatment.

“Current medicines for epilepsy are barely scraping the surface of what could be targeted. RNA therapeutics is going to change everything. It opens up entirely new targets – virtually anything in our genome becomes ‘druggable,’ ” said David Henshall, PhD, Royal College of Surgeons Ireland, Dublin.

Edward Kaye, MD, a pediatric neurologist and CEO of Stoke Therapeutics, agrees. “RNA therapeutics open up possibilities that could not have been imagined when I started my career,” he said in an interview.

“We now have the potential to change the way genetic epilepsies are treated by addressing the underlying genetic cause of the disease instead of just the seizures,” Dr. Kaye said.
 

Thank COVID?

Henrik Klitgaard, PhD, and Sakari Kauppinen, PhD, scientific co-founders of NEUmiRNA Therapeutics, noted that the success of messenger RNA (mRNA) vaccines to counter the COVID-19 pandemic has fueled interest in exploring the potential of RNA-based therapies as a new modality in epilepsy with improved therapeutic properties.

Dr. Klitgaard and Dr. Kauppinen recently co-authored a “critical review” on RNA therapies for epilepsy published online in Epilepsia.

Unlike current antiseizure medications, which only target ion channels and receptors, RNA therapeutics can directly intervene at the genetic level.

RNA drugs can be targeted toward noncoding RNAs, such as microRNAs, or toward mRNA. Targeting noncoding RNAs shows promise in sporadic, nongenetic epilepsies, and targeting of mRNAs shows promise in childhood monogenic epilepsies.

Preclinical studies have highlighted the potential of RNA therapies for treatment of epilepsy.

“At NEUmiRNA Therapeutics, we have successfully designed potent and selective RNA drugs for a novel disease target that enable unprecedented elimination of the drug resistance and chronic epilepsy in a preclinical model mimicking temporal lobe epilepsy,” said Dr. Klitgaard.

“Interestingly,” he said, “these experiments also showed a disappearance of symptoms for epilepsy that outlasted drug exposure, suggesting significant disease-modifying properties with a curative potential for epilepsy.”
 

Hope for Dravet syndrome

Currently, there is significant interest in development of antisense oligonucleotides (ASOs), particularly for Dravet syndrome, a rare genetic epileptic encephalopathy that begins in infancy and gives rise to seizures that don’t respond well to seizure medications.

Stoke Therapeutics is developing antisense therapies aimed at correcting mutations in sodium channel genes, which cause up to 80% of cases of Dravet syndrome.

The company recently reported positive safety and efficacy data from patients treated with STK-001, a proprietary ASO, in the two ongoing phase 1/2a studies (MONARCH and ADMIRAL) and the SWALLOWTAIL open-label extension study.

“These new data suggest clinical benefit for patients 2-18 years of age treated with multiple doses of STK-001. The observed reductions in convulsive seizure frequency as well as substantial improvements in cognition and behavior support the potential for disease modification in a highly refractory patient population,” the company said in a news release.

Dr. Kaye noted that the company anticipates reporting additional data in the first quarter of 2024 and expects to provide an update on phase 3 planning in the first half of 2024.

“Twenty-five years ago, when I was caring for patients in my clinic, half of epilepsy was considered idiopathic because we didn’t know the cause,” Dr. Kaye commented.

“Since then, thanks to an understanding of the genetics and more widely available access to genetic testing, we can determine the root cause of most of them. Today, I believe we are on the verge of a fundamental shift in how we approach the treatment of Dravet syndrome and, hopefully, other genetic epilepsies,” said Dr. Kaye.

“We are now finally getting to the point that we not only know the causes, but we are in a position to develop medicines that target those causes. We have seen this happen in other diseases like cystic fibrosis, and the time has come for genetic epilepsies,” he added.
 

A promising future

Dr. Henshall said that the ability to target the cause rather than just the symptoms of epilepsy “offers the promise of disease-modifying and potentially curative medicines in the future.”

And what’s exciting is that the time frame of developing RNA medicines may be “radically” different than it is for traditional small-drug development, he noted.

Take, for example, a case reported recently in the New England Journal of Medicine.

Researchers identified a novel mutation in a child with neuronal ceroid lipofuscinosis 7 (a form of Batten’s disease), a rare and fatal neurodegenerative disease. Identification of the mutation was followed by the development and use (within 1 year) of a tailored RNA drug to treat the patient.

One downside perhaps is that current RNA drugs for epilepsy are delivered intrathecally, which is different from oral administration of small-molecule drugs.

However, Dr. Kauppinen from NEUmiRNA Therapeutics noted that “advances in intrathecal delivery technologies [and] the frequent use of this route of administration in other diseases and IT administration only being required two to three times per year will certainly facilitate use of RNA medicines.”

“This will also eliminate the issue of drug adherence by ensuring full patient compliance to treatment,” Dr. Kauppinen said.

The review article on RNA therapies in epilepsy had no commercial funding. Dr. Henshall holds a patent and has filed intellectual property related to microRNA targeting therapies for epilepsy and has received funding for microRNA research from NEUmiRNA Therapeutics. Dr. Klitgaard and Dr. Kauppinen are cofounders of NEUmiRNA Therapeutics. Dr. Kaye is CEO of Stoke Therapeutics.

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

Could antidepressants hold the key to treating long COVID? University of Pennsylvania researchers have uncovered a link between long COVID and levels of serotonin in the body that may offer a new explanation for the condition. The study even points to a possible treatment.

Serotonin is a neurotransmitter that has many functions in the body and is targeted by the most commonly prescribed antidepressants – the selective serotonin reuptake inhibitors.

Serotonin is widely studied for its effects on the brain – it regulates the messaging between neurons, affecting sleep, mood, and memory. It is present in the gut, is found in cells along the gastrointestinal tract, and is absorbed by blood platelets. Gut serotonin, known as circulating serotonin, is responsible for a host of other functions, including the regulation of blood flow, body temperature, and digestion.

Low levels of serotonin could result in any number of seemingly unrelated symptoms, as in the case of long COVID, experts say. The condition affects about 7% of Americans and is associated with a wide range of health problems, including fatigue, shortness of breath, neurological symptoms, joint pain, blood clots, heart palpitations, and digestive problems.

Long COVID is difficult to treat because researchers haven’t been able to pinpoint the underlying mechanisms that cause prolonged illness after a SARS-CoV-2 infection, said study author Christoph A. Thaiss, PhD, an assistant professor of microbiology at the Perelman School of Medicine at the University of Pennsylvania.

The hope is that this study could have implications for new treatments, he said.

“Long COVID can have manifestations not only in the brain but in many different parts of the body, so it’s possible that serotonin reductions are involved in many different aspects of the disease,” said Dr. Thaiss.

Dr. Thaiss’s study, published in the journal Cell, found lower serotonin levels in long COVID patients, compared with patients who were diagnosed with acute COVID-19 but who fully recovered.

His team found that reductions in serotonin were driven by low levels of circulating SARS-CoV-2 virus that caused persistent inflammation as well as an inability of the body to absorb tryptophan, an amino acid that’s a precursor to serotonin. Overactive blood platelets were also shown to play a role; they serve as the primary means of serotonin absorption.

The study doesn’t make any recommendations for treatment, but understanding the role of serotonin in long COVID opens the door to a host of novel ideas that could set the stage for clinical trials and affect care.

“The study gives us a few possible targets that could be used in future clinical studies,” Dr. Thaiss said.

Persistent circulating virus is one of the drivers of low serotonin levels, said study author Michael Peluso, MD, an assistant research professor of infectious medicine at the University of California, San Francisco, School of Medicine. This points to the need to reduce viral load using antiviral medications like nirmatrelvir/ritonavir (Paxlovid), which is approved by the U.S. Food and Drug Administration for the treatment of COVID-19, and VV116, which has not yet been approved for use against COVID.

Research published in the New England Journal of Medicine found that the oral antiviral agent VV116 was as effective as nirmatrelvir/ritonavir in reducing the body’s viral load and aiding recovery from SARS-CoV-2 infection. Paxlovid has also been shown to reduce the likelihood of getting long COVID after an acute SARS-CoV-2 infection.

Researchers are investigating ways to target serotonin levels directly, potentially using SSRIs. But first they need to study whether improvement in serotonin level makes a difference.

“What we need now is a good clinical trial to see whether altering levels of serotonin in people with long COVID will lead to symptom relief,” Dr. Peluso said.

Indeed, the research did show that the SSRI fluoxetine, as well as a glycine-tryptophan supplement, improved cognitive function in SARS-CoV-2-infected rodent models, which were used in a portion of the study.

David F. Putrino, PhD, who runs the long COVID clinic at Mount Sinai Health System in New York City, said the research is helping “to paint a biological picture” that’s in line with other research on the mechanisms that cause long COVID symptoms.

But Dr. Putrino, who was not involved in the study, cautions against treating long COVID patients with SSRIs or any other treatment that increases serotonin before testing patients to determine whether their serotonin levels are actually lower than those of healthy persons.

“We don’t want to assume that every patient with long COVID is going to have lower serotonin levels,” said Dr. Putrino.

What’s more, researchers need to investigate whether SSRIs increase levels of circulating serotonin. It’s important to note that researchers found lower levels of circulating serotonin but that serotonin levels in the brain remained normal.

Traditionally, SSRIs are used clinically for increasing the levels of serotonin in the brain, not the body.

“Whether that’s going to contribute to an increase in systemic levels of serotonin, that’s something that needs to be tested,” said Akiko Iwasaki, PhD, co-lead investigator of the Yale School of Medicine, New Haven, Conn., COVID-19 Recovery Study, who was not involved in the research.

Thus far, investigators have not identified one unifying biomarker that seems to cause long COVID in all patients, said Dr. Iwasaki. Some research has found higher levels of certain immune cells and biomarkers: for example, monocytes and activated B lymphocytes, indicating a stronger and ongoing antibody response to the virus. Other recent research conducted by Dr. Iwasaki, Dr. Putrino, and others, published in the journal Nature, showed that long COVID patients tend to have lower levels of cortisol, which could be a factor in the extreme fatigue experienced by many who suffer from the condition.

The findings in the study in The Cell are promising, but they need to be replicated in more people, said Dr. Iwasaki. And even if they’re replicated in a larger study population, this would still be just one biomarker that is associated with one subtype of the disease. There is a need to better understand which biomarkers go with which symptoms so that the most effective treatments can be identified, she said.

Both Dr. Putrino and Dr. Iwasaki contended that there isn’t a single factor that can explain all of long COVID. It’s a complex disease caused by a host of different mechanisms.

Still, low levels of serotonin could be an important piece of the puzzle. The next step, said Dr. Iwasaki, is to uncover how many of the millions of Americans with long COVID have this biomarker.

“People working in the field of long COVID should now be considering this pathway and thinking of ways to measure serotonin in their patients.”

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

Could antidepressants hold the key to treating long COVID? University of Pennsylvania researchers have uncovered a link between long COVID and levels of serotonin in the body that may offer a new explanation for the condition. The study even points to a possible treatment.

Serotonin is a neurotransmitter that has many functions in the body and is targeted by the most commonly prescribed antidepressants – the selective serotonin reuptake inhibitors.

Serotonin is widely studied for its effects on the brain – it regulates the messaging between neurons, affecting sleep, mood, and memory. It is present in the gut, is found in cells along the gastrointestinal tract, and is absorbed by blood platelets. Gut serotonin, known as circulating serotonin, is responsible for a host of other functions, including the regulation of blood flow, body temperature, and digestion.

Low levels of serotonin could result in any number of seemingly unrelated symptoms, as in the case of long COVID, experts say. The condition affects about 7% of Americans and is associated with a wide range of health problems, including fatigue, shortness of breath, neurological symptoms, joint pain, blood clots, heart palpitations, and digestive problems.

Long COVID is difficult to treat because researchers haven’t been able to pinpoint the underlying mechanisms that cause prolonged illness after a SARS-CoV-2 infection, said study author Christoph A. Thaiss, PhD, an assistant professor of microbiology at the Perelman School of Medicine at the University of Pennsylvania.

The hope is that this study could have implications for new treatments, he said.

“Long COVID can have manifestations not only in the brain but in many different parts of the body, so it’s possible that serotonin reductions are involved in many different aspects of the disease,” said Dr. Thaiss.

Dr. Thaiss’s study, published in the journal Cell, found lower serotonin levels in long COVID patients, compared with patients who were diagnosed with acute COVID-19 but who fully recovered.

His team found that reductions in serotonin were driven by low levels of circulating SARS-CoV-2 virus that caused persistent inflammation as well as an inability of the body to absorb tryptophan, an amino acid that’s a precursor to serotonin. Overactive blood platelets were also shown to play a role; they serve as the primary means of serotonin absorption.

The study doesn’t make any recommendations for treatment, but understanding the role of serotonin in long COVID opens the door to a host of novel ideas that could set the stage for clinical trials and affect care.

“The study gives us a few possible targets that could be used in future clinical studies,” Dr. Thaiss said.

Persistent circulating virus is one of the drivers of low serotonin levels, said study author Michael Peluso, MD, an assistant research professor of infectious medicine at the University of California, San Francisco, School of Medicine. This points to the need to reduce viral load using antiviral medications like nirmatrelvir/ritonavir (Paxlovid), which is approved by the U.S. Food and Drug Administration for the treatment of COVID-19, and VV116, which has not yet been approved for use against COVID.

Research published in the New England Journal of Medicine found that the oral antiviral agent VV116 was as effective as nirmatrelvir/ritonavir in reducing the body’s viral load and aiding recovery from SARS-CoV-2 infection. Paxlovid has also been shown to reduce the likelihood of getting long COVID after an acute SARS-CoV-2 infection.

Researchers are investigating ways to target serotonin levels directly, potentially using SSRIs. But first they need to study whether improvement in serotonin level makes a difference.

“What we need now is a good clinical trial to see whether altering levels of serotonin in people with long COVID will lead to symptom relief,” Dr. Peluso said.

Indeed, the research did show that the SSRI fluoxetine, as well as a glycine-tryptophan supplement, improved cognitive function in SARS-CoV-2-infected rodent models, which were used in a portion of the study.

David F. Putrino, PhD, who runs the long COVID clinic at Mount Sinai Health System in New York City, said the research is helping “to paint a biological picture” that’s in line with other research on the mechanisms that cause long COVID symptoms.

But Dr. Putrino, who was not involved in the study, cautions against treating long COVID patients with SSRIs or any other treatment that increases serotonin before testing patients to determine whether their serotonin levels are actually lower than those of healthy persons.

“We don’t want to assume that every patient with long COVID is going to have lower serotonin levels,” said Dr. Putrino.

What’s more, researchers need to investigate whether SSRIs increase levels of circulating serotonin. It’s important to note that researchers found lower levels of circulating serotonin but that serotonin levels in the brain remained normal.

Traditionally, SSRIs are used clinically for increasing the levels of serotonin in the brain, not the body.

“Whether that’s going to contribute to an increase in systemic levels of serotonin, that’s something that needs to be tested,” said Akiko Iwasaki, PhD, co-lead investigator of the Yale School of Medicine, New Haven, Conn., COVID-19 Recovery Study, who was not involved in the research.

Thus far, investigators have not identified one unifying biomarker that seems to cause long COVID in all patients, said Dr. Iwasaki. Some research has found higher levels of certain immune cells and biomarkers: for example, monocytes and activated B lymphocytes, indicating a stronger and ongoing antibody response to the virus. Other recent research conducted by Dr. Iwasaki, Dr. Putrino, and others, published in the journal Nature, showed that long COVID patients tend to have lower levels of cortisol, which could be a factor in the extreme fatigue experienced by many who suffer from the condition.

The findings in the study in The Cell are promising, but they need to be replicated in more people, said Dr. Iwasaki. And even if they’re replicated in a larger study population, this would still be just one biomarker that is associated with one subtype of the disease. There is a need to better understand which biomarkers go with which symptoms so that the most effective treatments can be identified, she said.

Both Dr. Putrino and Dr. Iwasaki contended that there isn’t a single factor that can explain all of long COVID. It’s a complex disease caused by a host of different mechanisms.

Still, low levels of serotonin could be an important piece of the puzzle. The next step, said Dr. Iwasaki, is to uncover how many of the millions of Americans with long COVID have this biomarker.

“People working in the field of long COVID should now be considering this pathway and thinking of ways to measure serotonin in their patients.”

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

Could antidepressants hold the key to treating long COVID? University of Pennsylvania researchers have uncovered a link between long COVID and levels of serotonin in the body that may offer a new explanation for the condition. The study even points to a possible treatment.

Serotonin is a neurotransmitter that has many functions in the body and is targeted by the most commonly prescribed antidepressants – the selective serotonin reuptake inhibitors.

Serotonin is widely studied for its effects on the brain – it regulates the messaging between neurons, affecting sleep, mood, and memory. It is present in the gut, is found in cells along the gastrointestinal tract, and is absorbed by blood platelets. Gut serotonin, known as circulating serotonin, is responsible for a host of other functions, including the regulation of blood flow, body temperature, and digestion.

Low levels of serotonin could result in any number of seemingly unrelated symptoms, as in the case of long COVID, experts say. The condition affects about 7% of Americans and is associated with a wide range of health problems, including fatigue, shortness of breath, neurological symptoms, joint pain, blood clots, heart palpitations, and digestive problems.

Long COVID is difficult to treat because researchers haven’t been able to pinpoint the underlying mechanisms that cause prolonged illness after a SARS-CoV-2 infection, said study author Christoph A. Thaiss, PhD, an assistant professor of microbiology at the Perelman School of Medicine at the University of Pennsylvania.

The hope is that this study could have implications for new treatments, he said.

“Long COVID can have manifestations not only in the brain but in many different parts of the body, so it’s possible that serotonin reductions are involved in many different aspects of the disease,” said Dr. Thaiss.

Dr. Thaiss’s study, published in the journal Cell, found lower serotonin levels in long COVID patients, compared with patients who were diagnosed with acute COVID-19 but who fully recovered.

His team found that reductions in serotonin were driven by low levels of circulating SARS-CoV-2 virus that caused persistent inflammation as well as an inability of the body to absorb tryptophan, an amino acid that’s a precursor to serotonin. Overactive blood platelets were also shown to play a role; they serve as the primary means of serotonin absorption.

The study doesn’t make any recommendations for treatment, but understanding the role of serotonin in long COVID opens the door to a host of novel ideas that could set the stage for clinical trials and affect care.

“The study gives us a few possible targets that could be used in future clinical studies,” Dr. Thaiss said.

Persistent circulating virus is one of the drivers of low serotonin levels, said study author Michael Peluso, MD, an assistant research professor of infectious medicine at the University of California, San Francisco, School of Medicine. This points to the need to reduce viral load using antiviral medications like nirmatrelvir/ritonavir (Paxlovid), which is approved by the U.S. Food and Drug Administration for the treatment of COVID-19, and VV116, which has not yet been approved for use against COVID.

Research published in the New England Journal of Medicine found that the oral antiviral agent VV116 was as effective as nirmatrelvir/ritonavir in reducing the body’s viral load and aiding recovery from SARS-CoV-2 infection. Paxlovid has also been shown to reduce the likelihood of getting long COVID after an acute SARS-CoV-2 infection.

Researchers are investigating ways to target serotonin levels directly, potentially using SSRIs. But first they need to study whether improvement in serotonin level makes a difference.

“What we need now is a good clinical trial to see whether altering levels of serotonin in people with long COVID will lead to symptom relief,” Dr. Peluso said.

Indeed, the research did show that the SSRI fluoxetine, as well as a glycine-tryptophan supplement, improved cognitive function in SARS-CoV-2-infected rodent models, which were used in a portion of the study.

David F. Putrino, PhD, who runs the long COVID clinic at Mount Sinai Health System in New York City, said the research is helping “to paint a biological picture” that’s in line with other research on the mechanisms that cause long COVID symptoms.

But Dr. Putrino, who was not involved in the study, cautions against treating long COVID patients with SSRIs or any other treatment that increases serotonin before testing patients to determine whether their serotonin levels are actually lower than those of healthy persons.

“We don’t want to assume that every patient with long COVID is going to have lower serotonin levels,” said Dr. Putrino.

What’s more, researchers need to investigate whether SSRIs increase levels of circulating serotonin. It’s important to note that researchers found lower levels of circulating serotonin but that serotonin levels in the brain remained normal.

Traditionally, SSRIs are used clinically for increasing the levels of serotonin in the brain, not the body.

“Whether that’s going to contribute to an increase in systemic levels of serotonin, that’s something that needs to be tested,” said Akiko Iwasaki, PhD, co-lead investigator of the Yale School of Medicine, New Haven, Conn., COVID-19 Recovery Study, who was not involved in the research.

Thus far, investigators have not identified one unifying biomarker that seems to cause long COVID in all patients, said Dr. Iwasaki. Some research has found higher levels of certain immune cells and biomarkers: for example, monocytes and activated B lymphocytes, indicating a stronger and ongoing antibody response to the virus. Other recent research conducted by Dr. Iwasaki, Dr. Putrino, and others, published in the journal Nature, showed that long COVID patients tend to have lower levels of cortisol, which could be a factor in the extreme fatigue experienced by many who suffer from the condition.

The findings in the study in The Cell are promising, but they need to be replicated in more people, said Dr. Iwasaki. And even if they’re replicated in a larger study population, this would still be just one biomarker that is associated with one subtype of the disease. There is a need to better understand which biomarkers go with which symptoms so that the most effective treatments can be identified, she said.

Both Dr. Putrino and Dr. Iwasaki contended that there isn’t a single factor that can explain all of long COVID. It’s a complex disease caused by a host of different mechanisms.

Still, low levels of serotonin could be an important piece of the puzzle. The next step, said Dr. Iwasaki, is to uncover how many of the millions of Americans with long COVID have this biomarker.

“People working in the field of long COVID should now be considering this pathway and thinking of ways to measure serotonin in their patients.”

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

New evidence points to an association between exposure to “forever chemicals” and an increased risk for thyroid cancer.

The study suggests that higher exposure to per- and polyfluoroalkyl substances (PFAS), specifically perfluorooctanesulfonic acid (n-PFOS), may increase a person’s risk for thyroid cancer by 56%.

Several news outlets played up the findings, published online in eBioMedicine. “Dangerous ‘Forever Chemicals’ in Your Everyday Items Are Causing Cancer,” Newsweek reported.

But Gideon Meyerowitz-Katz, PhD, an epidemiologist at the University of Wollongong (Australia), voiced his skepticism.

“While it’s possible that PFAS might be causing thyroid cancer, the evidence thus far is unconvincing and probably not worth worrying about,” said Dr. Meyerowitz-Katz, who was not involved in the research.
 

PFAS and thyroid cancer

PFAS are a class of widely used synthetic chemicals found in many consumer and industrial products, including nonstick cookware, stain-repellent carpets, waterproof rain gear, microwave popcorn bags, and firefighting foam.

These substances have been dubbed “forever chemicals” because they do not degrade and are ubiquitous in the environment.

Exposure to endocrine-disrupting chemicals, including PFAS, has been identified as a potential risk factor for thyroid cancer, with some research linking PFAS exposure to thyroid dysfunction and carcinogenesis.

To investigate further, the researchers performed a nested case-control study of 86 patients with thyroid cancer using plasma samples collected at or before diagnosis and 86 controls without cancer who were matched on age, sex, race/ethnicity, body weight, smoking status, and year of sample collection. 

Eighteen individual PFAS were measured in plasma samples; 10 were undetectable and were therefore excluded from the analysis. Of the remaining eight PFAS, only one showed a statistically significant correlation with thyroid cancer. 

Specifically, the researchers found that exposure to n-PFOS was associated with a 56% increased risk for thyroid cancer among people who had a high level of the chemical in their blood (adjusted odds ratio, 1.56; P = .004). The results were similar when patients with papillary thyroid cancer only were included (aOR, 1.56; P = .009).

A separate longitudinal analysis of 31 patients diagnosed with thyroid cancer 1 year or more after plasma sample collection and 31 controls confirmed the positive association between n-PFOS and thyroid cancer (aOR, 2.67; P < .001). The longitudinal analysis also suggested correlations for a few other PFAS.

“This study supports the hypothesis that PFAS exposure may be associated with increased risk of thyroid cancer,” the authors concluded.

But in a Substack post, Dr. Meyerowitz-Katz said that it’s important to put the findings into “proper context before getting terrified about this all-new cancer risk.”

First, this study was “genuinely tiny,” with data on just 88 people with thyroid cancer and 88 controls, a limitation the researchers also acknowledged.

“That’s really not enough to do any sort of robust epidemiological analysis – you can generate interesting correlations, but what those correlations mean is anyone’s guess,” Dr. Meyerowitz-Katz said.

Even more importantly, one could easily argue that the results of this study show that most PFAS aren’t associated with thyroid cancer, given that there was no strong association for seven of the eight PFAS measured, he explained.

“There are no serious methodological concerns here, but equally there’s just not much you can reasonably gather from finding a single correlation among a vast ocean of possibilities,” Dr. Meyerowitz-Katz wrote. “Maybe there’s a correlation there, but you’d need to investigate this in much bigger samples, with more controls, and better data, to understand what that correlation means.”

Bottom line, Dr. Meyerowitz-Katz explained, is that “the link between PFAS and thyroid cancer is, at best, incredibly weak.”

Funding for the study was provided by the National Institutes of Health and The Andrea and Charles Bronfman Philanthropies. One coauthor is cofounder of Linus Biotechnology and is owner of a license agreement with NIES (Japan); received honoraria and travel compensation for lectures for the Bio-Echo and Brin foundations; and has 22 patents at various stages. Dr. Meyerowitz-Katz has no relevant disclosures.

A version of this article appeared on Medscape.com.

New evidence points to an association between exposure to “forever chemicals” and an increased risk for thyroid cancer.

The study suggests that higher exposure to per- and polyfluoroalkyl substances (PFAS), specifically perfluorooctanesulfonic acid (n-PFOS), may increase a person’s risk for thyroid cancer by 56%.

Several news outlets played up the findings, published online in eBioMedicine. “Dangerous ‘Forever Chemicals’ in Your Everyday Items Are Causing Cancer,” Newsweek reported.

But Gideon Meyerowitz-Katz, PhD, an epidemiologist at the University of Wollongong (Australia), voiced his skepticism.

“While it’s possible that PFAS might be causing thyroid cancer, the evidence thus far is unconvincing and probably not worth worrying about,” said Dr. Meyerowitz-Katz, who was not involved in the research.
 

PFAS and thyroid cancer

PFAS are a class of widely used synthetic chemicals found in many consumer and industrial products, including nonstick cookware, stain-repellent carpets, waterproof rain gear, microwave popcorn bags, and firefighting foam.

These substances have been dubbed “forever chemicals” because they do not degrade and are ubiquitous in the environment.

Exposure to endocrine-disrupting chemicals, including PFAS, has been identified as a potential risk factor for thyroid cancer, with some research linking PFAS exposure to thyroid dysfunction and carcinogenesis.

To investigate further, the researchers performed a nested case-control study of 86 patients with thyroid cancer using plasma samples collected at or before diagnosis and 86 controls without cancer who were matched on age, sex, race/ethnicity, body weight, smoking status, and year of sample collection. 

Eighteen individual PFAS were measured in plasma samples; 10 were undetectable and were therefore excluded from the analysis. Of the remaining eight PFAS, only one showed a statistically significant correlation with thyroid cancer. 

Specifically, the researchers found that exposure to n-PFOS was associated with a 56% increased risk for thyroid cancer among people who had a high level of the chemical in their blood (adjusted odds ratio, 1.56; P = .004). The results were similar when patients with papillary thyroid cancer only were included (aOR, 1.56; P = .009).

A separate longitudinal analysis of 31 patients diagnosed with thyroid cancer 1 year or more after plasma sample collection and 31 controls confirmed the positive association between n-PFOS and thyroid cancer (aOR, 2.67; P < .001). The longitudinal analysis also suggested correlations for a few other PFAS.

“This study supports the hypothesis that PFAS exposure may be associated with increased risk of thyroid cancer,” the authors concluded.

But in a Substack post, Dr. Meyerowitz-Katz said that it’s important to put the findings into “proper context before getting terrified about this all-new cancer risk.”

First, this study was “genuinely tiny,” with data on just 88 people with thyroid cancer and 88 controls, a limitation the researchers also acknowledged.

“That’s really not enough to do any sort of robust epidemiological analysis – you can generate interesting correlations, but what those correlations mean is anyone’s guess,” Dr. Meyerowitz-Katz said.

Even more importantly, one could easily argue that the results of this study show that most PFAS aren’t associated with thyroid cancer, given that there was no strong association for seven of the eight PFAS measured, he explained.

“There are no serious methodological concerns here, but equally there’s just not much you can reasonably gather from finding a single correlation among a vast ocean of possibilities,” Dr. Meyerowitz-Katz wrote. “Maybe there’s a correlation there, but you’d need to investigate this in much bigger samples, with more controls, and better data, to understand what that correlation means.”

Bottom line, Dr. Meyerowitz-Katz explained, is that “the link between PFAS and thyroid cancer is, at best, incredibly weak.”

Funding for the study was provided by the National Institutes of Health and The Andrea and Charles Bronfman Philanthropies. One coauthor is cofounder of Linus Biotechnology and is owner of a license agreement with NIES (Japan); received honoraria and travel compensation for lectures for the Bio-Echo and Brin foundations; and has 22 patents at various stages. Dr. Meyerowitz-Katz has no relevant disclosures.

A version of this article appeared on Medscape.com.

New evidence points to an association between exposure to “forever chemicals” and an increased risk for thyroid cancer.

The study suggests that higher exposure to per- and polyfluoroalkyl substances (PFAS), specifically perfluorooctanesulfonic acid (n-PFOS), may increase a person’s risk for thyroid cancer by 56%.

Several news outlets played up the findings, published online in eBioMedicine. “Dangerous ‘Forever Chemicals’ in Your Everyday Items Are Causing Cancer,” Newsweek reported.

But Gideon Meyerowitz-Katz, PhD, an epidemiologist at the University of Wollongong (Australia), voiced his skepticism.

“While it’s possible that PFAS might be causing thyroid cancer, the evidence thus far is unconvincing and probably not worth worrying about,” said Dr. Meyerowitz-Katz, who was not involved in the research.
 

PFAS and thyroid cancer

PFAS are a class of widely used synthetic chemicals found in many consumer and industrial products, including nonstick cookware, stain-repellent carpets, waterproof rain gear, microwave popcorn bags, and firefighting foam.

These substances have been dubbed “forever chemicals” because they do not degrade and are ubiquitous in the environment.

Exposure to endocrine-disrupting chemicals, including PFAS, has been identified as a potential risk factor for thyroid cancer, with some research linking PFAS exposure to thyroid dysfunction and carcinogenesis.

To investigate further, the researchers performed a nested case-control study of 86 patients with thyroid cancer using plasma samples collected at or before diagnosis and 86 controls without cancer who were matched on age, sex, race/ethnicity, body weight, smoking status, and year of sample collection. 

Eighteen individual PFAS were measured in plasma samples; 10 were undetectable and were therefore excluded from the analysis. Of the remaining eight PFAS, only one showed a statistically significant correlation with thyroid cancer. 

Specifically, the researchers found that exposure to n-PFOS was associated with a 56% increased risk for thyroid cancer among people who had a high level of the chemical in their blood (adjusted odds ratio, 1.56; P = .004). The results were similar when patients with papillary thyroid cancer only were included (aOR, 1.56; P = .009).

A separate longitudinal analysis of 31 patients diagnosed with thyroid cancer 1 year or more after plasma sample collection and 31 controls confirmed the positive association between n-PFOS and thyroid cancer (aOR, 2.67; P < .001). The longitudinal analysis also suggested correlations for a few other PFAS.

“This study supports the hypothesis that PFAS exposure may be associated with increased risk of thyroid cancer,” the authors concluded.

But in a Substack post, Dr. Meyerowitz-Katz said that it’s important to put the findings into “proper context before getting terrified about this all-new cancer risk.”

First, this study was “genuinely tiny,” with data on just 88 people with thyroid cancer and 88 controls, a limitation the researchers also acknowledged.

“That’s really not enough to do any sort of robust epidemiological analysis – you can generate interesting correlations, but what those correlations mean is anyone’s guess,” Dr. Meyerowitz-Katz said.

Even more importantly, one could easily argue that the results of this study show that most PFAS aren’t associated with thyroid cancer, given that there was no strong association for seven of the eight PFAS measured, he explained.

“There are no serious methodological concerns here, but equally there’s just not much you can reasonably gather from finding a single correlation among a vast ocean of possibilities,” Dr. Meyerowitz-Katz wrote. “Maybe there’s a correlation there, but you’d need to investigate this in much bigger samples, with more controls, and better data, to understand what that correlation means.”

Bottom line, Dr. Meyerowitz-Katz explained, is that “the link between PFAS and thyroid cancer is, at best, incredibly weak.”

Funding for the study was provided by the National Institutes of Health and The Andrea and Charles Bronfman Philanthropies. One coauthor is cofounder of Linus Biotechnology and is owner of a license agreement with NIES (Japan); received honoraria and travel compensation for lectures for the Bio-Echo and Brin foundations; and has 22 patents at various stages. Dr. Meyerowitz-Katz has no relevant disclosures.

A version of this article appeared on Medscape.com.

Hearing loss and tinnitus are the top and third most common service-connected disabilities among veterans. According to a Veterans Benefits Administration report, as of fiscal year 2020, more than 1.3 million veterans were receiving disability compensation for hearing loss and more than 2.3 million for tinnitus. Not surprisingly, the US Department of Veterans Affairs (VA) is the largest employer of audiologists and speech-language pathologists in the US.

On the bright side, military hearing losses are at stable levels—but “it’s not improving,” said US Army Lt Col Michael Murphy, chief of the studies and analysis section and Army audiology liaison at the Defense Health Agency Hearing Center of Excellence (HCE), in an interview for Department of Defense news.

Hearing protection is critical to reduce injury. Exposure to firearms, explosives, and other “continuous hazardous noise” puts service members and US Department of Defense (DoD) civilians at risk of permanent hearing loss, said Theresa Schulz, PhD, chief of the HCE prevention and surveillance section. “Good hearing is a key to mission success.”

Hearing protectors, which Shulz calls “the last line of defense from noise-induced hearing loss,” work best when they fit right: protecting against noise and, when necessary, not muffling voices, alarms, and other important sounds. That is why the DoD has updated its requirements for fit testing. All DoD personnel who are exposed to continuous and intermittent noise ≥ 85 decibels (in an 8-hour average) or impulse noise sound pressure ≥ 140 decibels (for ≥ 1 day per year) must be enrolled in a hearing conservation program. Additional criteria are expected for release by December 2023. According to HCE, each service may have more stringent requirements for hearing protector fit testing that better meets the needs of their hearing conservation program.

The question of proper fit was at the root of a recent lawsuit charging 3M with knowingly selling defective earplugs to the US military. The 3M dual-ended Combat Arms Earplug (CAEv2) was designed to eliminate the need for soldiers to carry 2 different sets of earplugs. Worn one way, it was intended to block sound like traditional earplugs; worn in reverse, it would block only certain types of loud battlefield noise while allowing the wearer to hear softer, closer sounds.

However, no 2 ears are the same—even on the same person. According to the HCE, during hearing protection testing, there is a < 2 mm difference in insertion depth between left and right ears for 85% of subjects. A 2016 whistleblower lawsuit accused 3M of not disclosing that the CAEv2 was too short for proper insertion into users’ ears and that it could loosen imperceptibly and fail to form the protective seal.

In 2018, 3M agreed to pay $9.1 million to the Department of Justice to resolve the allegations without admitting liability. That case led to the largest mass tort multidistrict litigation in US history. Last February, Veterans of Foreign Wars (VFW) filed an amicus curiae brief to the Seventh Circuit Court of Appeals in support of claimants seeking relief from 3M for defective ear protection. Approximately 240,000 veterans filed lawsuits against 3M. In September the parties reached a $6 billion settlement—nearly half of 3M’s worth. According to John Muckelbauer, a veteran and general counsel for the VFW in a military.com opinion piece, the settlement achieves balance: not pushing the already financially strapped 3M into bankruptcy, but sending “a strong signal that the safety of our service members can never be compromised.”

Crucially, Muckelbauer notes, the VA says participating in the lawsuit will not result in the loss of health or disability benefits, nor will it adversely affect disability ratings. VA facilities are also barred from recovering any portion of a plaintiff’s award as part of a medical lien.

3M has not admitted responsibility in this settlement either, frustrating the veteran claimants. An admission of guilt was never on the table, says Ronald Miller, Jr., writing for the Lawsuit Information Center, which posts updates on class action lawsuits. “Admitting responsibility would open the door for everyone to opt out and move forward on that admission… Admitting guilt would also be harmful to 3M’s reputation. They have long vigorously denied responsibility, so the optics would be terrible.”

A new twist cropped up almost immediately when claimants began getting cold calls from scammers impersonating employees of Archer Systems LLC, the company designated to administer the settlement. The scammers attempted to extract sensitive personal information, including Social Security numbers. Judge M. Casey Rodgers alerted the Federal Bureau of Investigation and warned claimants to safeguard their data vigilantly and report any fraudulent attempts.

The settlement money will be paid out from 2023 to 2029, with $1 billion in the form of 3M stock, 3M said in a statement. (In August 2023, upon news of the settlement, the price of 3M shares had risen nearly 5%.) Miller says the whole $6 billion will be distributed using a point system that awards amounts according to disability, with, for instance, tinnitus without contemporaneous corroboration getting the least and moderate or greater hearing loss getting the most. “This settlement is a tremendous outcome for veterans of Iraq and Afghanistan who put their lives on the line for our freedom,” said Duane Sarmiento, VFW national commander in a statement. “For those who came home with hearing damage due to 3M’s faulty earplugs, this is not only compensation, it’s a statement that their sacrifices won’t be ignored.”

Hearing loss and tinnitus are the top and third most common service-connected disabilities among veterans. According to a Veterans Benefits Administration report, as of fiscal year 2020, more than 1.3 million veterans were receiving disability compensation for hearing loss and more than 2.3 million for tinnitus. Not surprisingly, the US Department of Veterans Affairs (VA) is the largest employer of audiologists and speech-language pathologists in the US.

On the bright side, military hearing losses are at stable levels—but “it’s not improving,” said US Army Lt Col Michael Murphy, chief of the studies and analysis section and Army audiology liaison at the Defense Health Agency Hearing Center of Excellence (HCE), in an interview for Department of Defense news.

Hearing protection is critical to reduce injury. Exposure to firearms, explosives, and other “continuous hazardous noise” puts service members and US Department of Defense (DoD) civilians at risk of permanent hearing loss, said Theresa Schulz, PhD, chief of the HCE prevention and surveillance section. “Good hearing is a key to mission success.”

Hearing protectors, which Shulz calls “the last line of defense from noise-induced hearing loss,” work best when they fit right: protecting against noise and, when necessary, not muffling voices, alarms, and other important sounds. That is why the DoD has updated its requirements for fit testing. All DoD personnel who are exposed to continuous and intermittent noise ≥ 85 decibels (in an 8-hour average) or impulse noise sound pressure ≥ 140 decibels (for ≥ 1 day per year) must be enrolled in a hearing conservation program. Additional criteria are expected for release by December 2023. According to HCE, each service may have more stringent requirements for hearing protector fit testing that better meets the needs of their hearing conservation program.

The question of proper fit was at the root of a recent lawsuit charging 3M with knowingly selling defective earplugs to the US military. The 3M dual-ended Combat Arms Earplug (CAEv2) was designed to eliminate the need for soldiers to carry 2 different sets of earplugs. Worn one way, it was intended to block sound like traditional earplugs; worn in reverse, it would block only certain types of loud battlefield noise while allowing the wearer to hear softer, closer sounds.

However, no 2 ears are the same—even on the same person. According to the HCE, during hearing protection testing, there is a < 2 mm difference in insertion depth between left and right ears for 85% of subjects. A 2016 whistleblower lawsuit accused 3M of not disclosing that the CAEv2 was too short for proper insertion into users’ ears and that it could loosen imperceptibly and fail to form the protective seal.

In 2018, 3M agreed to pay $9.1 million to the Department of Justice to resolve the allegations without admitting liability. That case led to the largest mass tort multidistrict litigation in US history. Last February, Veterans of Foreign Wars (VFW) filed an amicus curiae brief to the Seventh Circuit Court of Appeals in support of claimants seeking relief from 3M for defective ear protection. Approximately 240,000 veterans filed lawsuits against 3M. In September the parties reached a $6 billion settlement—nearly half of 3M’s worth. According to John Muckelbauer, a veteran and general counsel for the VFW in a military.com opinion piece, the settlement achieves balance: not pushing the already financially strapped 3M into bankruptcy, but sending “a strong signal that the safety of our service members can never be compromised.”

Crucially, Muckelbauer notes, the VA says participating in the lawsuit will not result in the loss of health or disability benefits, nor will it adversely affect disability ratings. VA facilities are also barred from recovering any portion of a plaintiff’s award as part of a medical lien.

3M has not admitted responsibility in this settlement either, frustrating the veteran claimants. An admission of guilt was never on the table, says Ronald Miller, Jr., writing for the Lawsuit Information Center, which posts updates on class action lawsuits. “Admitting responsibility would open the door for everyone to opt out and move forward on that admission… Admitting guilt would also be harmful to 3M’s reputation. They have long vigorously denied responsibility, so the optics would be terrible.”

A new twist cropped up almost immediately when claimants began getting cold calls from scammers impersonating employees of Archer Systems LLC, the company designated to administer the settlement. The scammers attempted to extract sensitive personal information, including Social Security numbers. Judge M. Casey Rodgers alerted the Federal Bureau of Investigation and warned claimants to safeguard their data vigilantly and report any fraudulent attempts.

The settlement money will be paid out from 2023 to 2029, with $1 billion in the form of 3M stock, 3M said in a statement. (In August 2023, upon news of the settlement, the price of 3M shares had risen nearly 5%.) Miller says the whole $6 billion will be distributed using a point system that awards amounts according to disability, with, for instance, tinnitus without contemporaneous corroboration getting the least and moderate or greater hearing loss getting the most. “This settlement is a tremendous outcome for veterans of Iraq and Afghanistan who put their lives on the line for our freedom,” said Duane Sarmiento, VFW national commander in a statement. “For those who came home with hearing damage due to 3M’s faulty earplugs, this is not only compensation, it’s a statement that their sacrifices won’t be ignored.”

Hearing loss and tinnitus are the top and third most common service-connected disabilities among veterans. According to a Veterans Benefits Administration report, as of fiscal year 2020, more than 1.3 million veterans were receiving disability compensation for hearing loss and more than 2.3 million for tinnitus. Not surprisingly, the US Department of Veterans Affairs (VA) is the largest employer of audiologists and speech-language pathologists in the US.

On the bright side, military hearing losses are at stable levels—but “it’s not improving,” said US Army Lt Col Michael Murphy, chief of the studies and analysis section and Army audiology liaison at the Defense Health Agency Hearing Center of Excellence (HCE), in an interview for Department of Defense news.

Hearing protection is critical to reduce injury. Exposure to firearms, explosives, and other “continuous hazardous noise” puts service members and US Department of Defense (DoD) civilians at risk of permanent hearing loss, said Theresa Schulz, PhD, chief of the HCE prevention and surveillance section. “Good hearing is a key to mission success.”

Hearing protectors, which Shulz calls “the last line of defense from noise-induced hearing loss,” work best when they fit right: protecting against noise and, when necessary, not muffling voices, alarms, and other important sounds. That is why the DoD has updated its requirements for fit testing. All DoD personnel who are exposed to continuous and intermittent noise ≥ 85 decibels (in an 8-hour average) or impulse noise sound pressure ≥ 140 decibels (for ≥ 1 day per year) must be enrolled in a hearing conservation program. Additional criteria are expected for release by December 2023. According to HCE, each service may have more stringent requirements for hearing protector fit testing that better meets the needs of their hearing conservation program.

The question of proper fit was at the root of a recent lawsuit charging 3M with knowingly selling defective earplugs to the US military. The 3M dual-ended Combat Arms Earplug (CAEv2) was designed to eliminate the need for soldiers to carry 2 different sets of earplugs. Worn one way, it was intended to block sound like traditional earplugs; worn in reverse, it would block only certain types of loud battlefield noise while allowing the wearer to hear softer, closer sounds.

However, no 2 ears are the same—even on the same person. According to the HCE, during hearing protection testing, there is a < 2 mm difference in insertion depth between left and right ears for 85% of subjects. A 2016 whistleblower lawsuit accused 3M of not disclosing that the CAEv2 was too short for proper insertion into users’ ears and that it could loosen imperceptibly and fail to form the protective seal.

In 2018, 3M agreed to pay $9.1 million to the Department of Justice to resolve the allegations without admitting liability. That case led to the largest mass tort multidistrict litigation in US history. Last February, Veterans of Foreign Wars (VFW) filed an amicus curiae brief to the Seventh Circuit Court of Appeals in support of claimants seeking relief from 3M for defective ear protection. Approximately 240,000 veterans filed lawsuits against 3M. In September the parties reached a $6 billion settlement—nearly half of 3M’s worth. According to John Muckelbauer, a veteran and general counsel for the VFW in a military.com opinion piece, the settlement achieves balance: not pushing the already financially strapped 3M into bankruptcy, but sending “a strong signal that the safety of our service members can never be compromised.”

Crucially, Muckelbauer notes, the VA says participating in the lawsuit will not result in the loss of health or disability benefits, nor will it adversely affect disability ratings. VA facilities are also barred from recovering any portion of a plaintiff’s award as part of a medical lien.

3M has not admitted responsibility in this settlement either, frustrating the veteran claimants. An admission of guilt was never on the table, says Ronald Miller, Jr., writing for the Lawsuit Information Center, which posts updates on class action lawsuits. “Admitting responsibility would open the door for everyone to opt out and move forward on that admission… Admitting guilt would also be harmful to 3M’s reputation. They have long vigorously denied responsibility, so the optics would be terrible.”

A new twist cropped up almost immediately when claimants began getting cold calls from scammers impersonating employees of Archer Systems LLC, the company designated to administer the settlement. The scammers attempted to extract sensitive personal information, including Social Security numbers. Judge M. Casey Rodgers alerted the Federal Bureau of Investigation and warned claimants to safeguard their data vigilantly and report any fraudulent attempts.

The settlement money will be paid out from 2023 to 2029, with $1 billion in the form of 3M stock, 3M said in a statement. (In August 2023, upon news of the settlement, the price of 3M shares had risen nearly 5%.) Miller says the whole $6 billion will be distributed using a point system that awards amounts according to disability, with, for instance, tinnitus without contemporaneous corroboration getting the least and moderate or greater hearing loss getting the most. “This settlement is a tremendous outcome for veterans of Iraq and Afghanistan who put their lives on the line for our freedom,” said Duane Sarmiento, VFW national commander in a statement. “For those who came home with hearing damage due to 3M’s faulty earplugs, this is not only compensation, it’s a statement that their sacrifices won’t be ignored.”

The US Department of Veterans Affairs (VA) has been establishing partnerships right, left, and center to improve and expand care for veterans. Instead of going it alone, VA is partnering with academic affiliates, Native American tribes, and the military to take advantage of state and federal funds.

In California, the VA Palo Alto Health Care System and Stanford Medicine announced a deal to plan, build, and operate a National Cancer Institute–designated joint cancer care and research center on the VA Palo Alto campus. The partnership is another offshoot of the PACT Act, in part because of the number of veterans who need cancer treatment related to, for instance, airborne toxins. The influx of veterans via the PACT Act could represent “the largest expansion of veterans’ benefits in history,” VA Under Secretary for Health Shereef Elnahal, MD, MBA, said at a press event about the collaboration. “This will allow us to partner with every powerhouse academic center in the country if we do this right. For research, training, and care delivery, it’s all one bucket of cancer care that veterans deserve.”

A separate partnership between the Cherokee Nation and Eastern Oklahoma VA Healthcare System will establish a VA clinic inside the Cherokee Nation’s Vinita Health Center, an hour northeast of Tulsa. The clinic, expected to open early next year, will serve any veteran. “Cherokees and other Native Americans serve in the US military at a higher rate than any other group, and veterans hold a special place in our hearts,” Cherokee Nation Principal Chief Chuck Hoskin Jr. said in a statement. “I am honored to do my part in covering veterans’ long-term health needs.”

The VA serves about 53,000 veterans living in eastern Oklahoma. Officials predict that partnership could serve as a roadmap for how rural America can work with tribes to increase care for veterans. “As we look ahead, this partnership with the VA can be a model for other tribes and communities across the nation,” Hoskin said.

Another collaborative plan, this one by the VA and US Department of Defense (DoD), will give about 37,000 Gulf Coast–area veterans access to care at a new Naval Hospital Pensacola clinic. Local veterans who previously received care from community clinicians or traveled to the Biloxi VA Medical Center in Mississippi will now be able to receive same-day, outpatient surgical care. “This partnership will help VA provide more care, more quickly, to more Gulf Coast veterans—as close to their homes as possible,” said Elnahal.

An agreement with the University of Pennsylvania Health System (UPHS) will improve infrastructure at the Coatesville VA Medical Center by repurposing a recently closed hospital nearby for outpatient, acute mental health, and long-term care services. “The PACT Act allows for great synergy between Penn Medicine and the VA, and we hope to leverage this new model to set the standard for how our nation approaches military medicine,” UPHS CEO Kevin B. Mahoney said.

An Eastern Oklahoma VA Health Care System hospital scheduled to open in 2025 in Tulsa was partially funded through the Communities Helping Invest through Property and Improvements Needed (CHIP-IN) program, the state of Oklahoma, the city of Tulsa, and the nonprofit team of Oklahoma State University Medical and the Anne and Henry Zarrow Foundation. When completed, the 58-bed hospital will serve approximately 38,000 veterans.

The US Department of Veterans Affairs (VA) has been establishing partnerships right, left, and center to improve and expand care for veterans. Instead of going it alone, VA is partnering with academic affiliates, Native American tribes, and the military to take advantage of state and federal funds.

In California, the VA Palo Alto Health Care System and Stanford Medicine announced a deal to plan, build, and operate a National Cancer Institute–designated joint cancer care and research center on the VA Palo Alto campus. The partnership is another offshoot of the PACT Act, in part because of the number of veterans who need cancer treatment related to, for instance, airborne toxins. The influx of veterans via the PACT Act could represent “the largest expansion of veterans’ benefits in history,” VA Under Secretary for Health Shereef Elnahal, MD, MBA, said at a press event about the collaboration. “This will allow us to partner with every powerhouse academic center in the country if we do this right. For research, training, and care delivery, it’s all one bucket of cancer care that veterans deserve.”

A separate partnership between the Cherokee Nation and Eastern Oklahoma VA Healthcare System will establish a VA clinic inside the Cherokee Nation’s Vinita Health Center, an hour northeast of Tulsa. The clinic, expected to open early next year, will serve any veteran. “Cherokees and other Native Americans serve in the US military at a higher rate than any other group, and veterans hold a special place in our hearts,” Cherokee Nation Principal Chief Chuck Hoskin Jr. said in a statement. “I am honored to do my part in covering veterans’ long-term health needs.”

The VA serves about 53,000 veterans living in eastern Oklahoma. Officials predict that partnership could serve as a roadmap for how rural America can work with tribes to increase care for veterans. “As we look ahead, this partnership with the VA can be a model for other tribes and communities across the nation,” Hoskin said.

Another collaborative plan, this one by the VA and US Department of Defense (DoD), will give about 37,000 Gulf Coast–area veterans access to care at a new Naval Hospital Pensacola clinic. Local veterans who previously received care from community clinicians or traveled to the Biloxi VA Medical Center in Mississippi will now be able to receive same-day, outpatient surgical care. “This partnership will help VA provide more care, more quickly, to more Gulf Coast veterans—as close to their homes as possible,” said Elnahal.

An agreement with the University of Pennsylvania Health System (UPHS) will improve infrastructure at the Coatesville VA Medical Center by repurposing a recently closed hospital nearby for outpatient, acute mental health, and long-term care services. “The PACT Act allows for great synergy between Penn Medicine and the VA, and we hope to leverage this new model to set the standard for how our nation approaches military medicine,” UPHS CEO Kevin B. Mahoney said.

An Eastern Oklahoma VA Health Care System hospital scheduled to open in 2025 in Tulsa was partially funded through the Communities Helping Invest through Property and Improvements Needed (CHIP-IN) program, the state of Oklahoma, the city of Tulsa, and the nonprofit team of Oklahoma State University Medical and the Anne and Henry Zarrow Foundation. When completed, the 58-bed hospital will serve approximately 38,000 veterans.

The US Department of Veterans Affairs (VA) has been establishing partnerships right, left, and center to improve and expand care for veterans. Instead of going it alone, VA is partnering with academic affiliates, Native American tribes, and the military to take advantage of state and federal funds.

In California, the VA Palo Alto Health Care System and Stanford Medicine announced a deal to plan, build, and operate a National Cancer Institute–designated joint cancer care and research center on the VA Palo Alto campus. The partnership is another offshoot of the PACT Act, in part because of the number of veterans who need cancer treatment related to, for instance, airborne toxins. The influx of veterans via the PACT Act could represent “the largest expansion of veterans’ benefits in history,” VA Under Secretary for Health Shereef Elnahal, MD, MBA, said at a press event about the collaboration. “This will allow us to partner with every powerhouse academic center in the country if we do this right. For research, training, and care delivery, it’s all one bucket of cancer care that veterans deserve.”

A separate partnership between the Cherokee Nation and Eastern Oklahoma VA Healthcare System will establish a VA clinic inside the Cherokee Nation’s Vinita Health Center, an hour northeast of Tulsa. The clinic, expected to open early next year, will serve any veteran. “Cherokees and other Native Americans serve in the US military at a higher rate than any other group, and veterans hold a special place in our hearts,” Cherokee Nation Principal Chief Chuck Hoskin Jr. said in a statement. “I am honored to do my part in covering veterans’ long-term health needs.”

The VA serves about 53,000 veterans living in eastern Oklahoma. Officials predict that partnership could serve as a roadmap for how rural America can work with tribes to increase care for veterans. “As we look ahead, this partnership with the VA can be a model for other tribes and communities across the nation,” Hoskin said.

Another collaborative plan, this one by the VA and US Department of Defense (DoD), will give about 37,000 Gulf Coast–area veterans access to care at a new Naval Hospital Pensacola clinic. Local veterans who previously received care from community clinicians or traveled to the Biloxi VA Medical Center in Mississippi will now be able to receive same-day, outpatient surgical care. “This partnership will help VA provide more care, more quickly, to more Gulf Coast veterans—as close to their homes as possible,” said Elnahal.

An agreement with the University of Pennsylvania Health System (UPHS) will improve infrastructure at the Coatesville VA Medical Center by repurposing a recently closed hospital nearby for outpatient, acute mental health, and long-term care services. “The PACT Act allows for great synergy between Penn Medicine and the VA, and we hope to leverage this new model to set the standard for how our nation approaches military medicine,” UPHS CEO Kevin B. Mahoney said.

An Eastern Oklahoma VA Health Care System hospital scheduled to open in 2025 in Tulsa was partially funded through the Communities Helping Invest through Property and Improvements Needed (CHIP-IN) program, the state of Oklahoma, the city of Tulsa, and the nonprofit team of Oklahoma State University Medical and the Anne and Henry Zarrow Foundation. When completed, the 58-bed hospital will serve approximately 38,000 veterans.

The 10 best-selling liver health supplements on Amazon bring in an estimated $2.5 million each month. But none of them contain ingredients recommended by major groups of doctors who treat liver issues in the United States or Europe.

Like many supplements, popular online liver products are unregulated, meaning they do not have to meet the same safety and effectiveness standards as prescription medications. 

Sales of liver supplements are growing, particularly in the last few years, said Ahmed Eltelbany, MD, MPH, a first-year gastrointestinal fellow at the University of New Mexico. One reason could be increased alcohol use during the COVID-19 pandemic.

Some manufacturers make bold claims on Amazon, said Dr. Eltelbany, author of a study that looked into the supplements. “The most recurrent claims were that their supplements maintain normal liver function, are scientifically formulated, and – my personal favorite – are a highly effective liver detox formulation developed according to the latest scientific findings.”

While these claims might sound reassuring and scientifically grounded to an average consumer, he said, most of them are not backed up by rigorous clinical research.
 

Does natural mean safe?

Many supplements are marketed as “liver cleansing,” for “liver detox,” or for “liver support,” Dr. Eltelbany said as he presented the study results at the annual meeting of the American College of Gastroenterology. 

“People take these supplements because they believe they’re natural and therefore they’re safe,” said Paul Y. Kwo, MD, who moderated a session on the study at the meeting, when asked to comment. “As I tell every patient in clinic, a great white shark is natural, a scorpion is natural, and so is a hurricane. So just because they’re natural doesn’t mean they’re safe.”

At the same time, “it’s not that every supplement is bad for you. Nonetheless, there’s just a dizzying array of these out there” said Dr. Kwo, a professor of medicine at Stanford Medicine in Redwood, Calif.

“We have to be very cautious,” he said. For example, some people might believe that “if a little bit of a supplement is good, a tremendous amount must be really good.” The antioxidant turmeric, for example, has a pretty good safety record, he said. But this past year, some liver toxicity concerns arose about preparations with “very, very high concentrations” of turmeric. 
 

The top 10 sellers

Dr. Eltelbany and colleagues studied prices for 1-month supplies, monthly sales, and revenue for the top 10 liver supplements sold on Amazon on June 3, 2023:

Ranking by sales:

• 1. Liver Cleanse Detox & Repair Formula – Herbal Liver Supplement with Milk Thistle, Dandelion Root, Organic Turmeric and Artichoke Extract for Liver Health – Silymarin Milk Thistle Detox Capsules
• 2. Ancestral Supplements Grass Fed Beef Liver Capsules. Supports Energy Production, Detoxification, Digestion, Immunity and Full Body Wellness, Non-GMO, Freeze Dried Liver Health Supplement, 180 Capsules
• 3. Bronson Milk Thistle 1,000 mg Silymarin Marianum & Dandelion Root Liver Health Support, 120 Capsules
• 4. PUREHEALTH RESEARCH Liver Supplement – Herbal Liver Cleanse Detox & Repair with Milk Thistle, Artichoke Extract, Dandelion Root, Turmeric, Berberine to Healthy Liver Renew with 11 Natural Nutrients
• 5. TUDCA Bile Salts Liver Support Supplement, 500-mg Servings, Liver and Gallbladder Cleanse Supplement (60 Capsules 250 mg) Genuine Bile Acid. TUDCA Strong Bitter Taste by Double Wood
• 6. 28-in-1 Liver Cleanse Detox & Repair Fatty Liver Formula, Milk Thistle Silymarin, Artichoke Extract, Dandelion & Apple Cider Vinegar – Liver Health Supplement Support Pills – Vegan Capsules
• 7. Vita-Liver Liver Health Supplement – Support Liver Cleanse & Detox – Liquid Delivery for Absorption – Milk Thistle, Artichoke, Chanca Piedra, Dandelion & More
• 8. Liver Supplement with Milk Thistle, Liver Detox Formula, Artichoke and Turmeric. Supports Liver Health Defense & Liver Renew. Liver Cleanse Detox & Repair for Fatty Liver Support. 60 Capsules
• 9. Liver Cleanse Detox & Repair. Milk Thistle Extract with Silymarin 80%, Artichoke Extract, Dandelion Root, Chicory, 25+ Herbs – Premium Liver Health Formula, Liver Support Detox Health Formula – Liver Support Detox Cleanse Supplement
• 10. Arazo Nutrition Liver Cleanse Detox & Repair Formula – Milk Thistle Herbal Support Supplement: Silymarin, Beet, Artichoke, Dandelion, Chicory Root

The investigators found a total of 65 unique ingredients. “Most of these ingredients have historical uses linked to liver health. But our research revealed that strong scientific evidence supporting the efficacy of any of these supplements is currently lacking,” Dr. Eltelbany said. They started the study by creating a new account on Amazon to make sure the search would not be influenced by prior shopping or purchases. They next searched for supplements using the keywords “liver” and “cleanse.” To figure out sales numbers, they used the AMZScout proprietary analytics software that Amazon sellers use to track sales. 
 

Reviewing the reviews

The researchers discovered an average 11,526 reviews for each supplement product. The average rating was 4.42 stars out of 5. 

Using Fakespot.com, proprietary Amazon customer review software that analyzes the timing and language of reviews, they found that only 65% of product reviews were genuine. 

“We felt it was crucial to vet the authenticity of customer feedback,” Dr. Eltelbany said.
 

Few other options?

Liver disease remains a persistent and significant global health burden. Despite advances in many areas of gastroenterology, there remains no curative treatment for liver cirrhosis, Dr. Eltelbany said. 

The primary option for people with end-stage liver disease is a liver transplant. “However, given the scarcity of donors and the vast number of patients in need, many individuals, unfortunately, do not get a timely transplant,” he said. “This void of treatment options and the desperation to find relief often drives patients towards alternative therapies.”

Also, online shopping has made getting these supplements “as simple as a click away. But what’s more concerning is the trust placed in these products by our patients,” Dr. Eltelbany said.

“There’s a strong need for rigorous scientific investigation into the actual health benefits of any liver detox supplements,” he said. “Above all, patient education remains paramount, warning them of potential risks and unknowns of these supplements.”

A version of this article appeared on WebMD.com.

The 10 best-selling liver health supplements on Amazon bring in an estimated $2.5 million each month. But none of them contain ingredients recommended by major groups of doctors who treat liver issues in the United States or Europe.

Like many supplements, popular online liver products are unregulated, meaning they do not have to meet the same safety and effectiveness standards as prescription medications. 

Sales of liver supplements are growing, particularly in the last few years, said Ahmed Eltelbany, MD, MPH, a first-year gastrointestinal fellow at the University of New Mexico. One reason could be increased alcohol use during the COVID-19 pandemic.

Some manufacturers make bold claims on Amazon, said Dr. Eltelbany, author of a study that looked into the supplements. “The most recurrent claims were that their supplements maintain normal liver function, are scientifically formulated, and – my personal favorite – are a highly effective liver detox formulation developed according to the latest scientific findings.”

While these claims might sound reassuring and scientifically grounded to an average consumer, he said, most of them are not backed up by rigorous clinical research.
 

Does natural mean safe?

Many supplements are marketed as “liver cleansing,” for “liver detox,” or for “liver support,” Dr. Eltelbany said as he presented the study results at the annual meeting of the American College of Gastroenterology. 

“People take these supplements because they believe they’re natural and therefore they’re safe,” said Paul Y. Kwo, MD, who moderated a session on the study at the meeting, when asked to comment. “As I tell every patient in clinic, a great white shark is natural, a scorpion is natural, and so is a hurricane. So just because they’re natural doesn’t mean they’re safe.”

At the same time, “it’s not that every supplement is bad for you. Nonetheless, there’s just a dizzying array of these out there” said Dr. Kwo, a professor of medicine at Stanford Medicine in Redwood, Calif.

“We have to be very cautious,” he said. For example, some people might believe that “if a little bit of a supplement is good, a tremendous amount must be really good.” The antioxidant turmeric, for example, has a pretty good safety record, he said. But this past year, some liver toxicity concerns arose about preparations with “very, very high concentrations” of turmeric. 
 

The top 10 sellers

Dr. Eltelbany and colleagues studied prices for 1-month supplies, monthly sales, and revenue for the top 10 liver supplements sold on Amazon on June 3, 2023:

Ranking by sales:

• 1. Liver Cleanse Detox & Repair Formula – Herbal Liver Supplement with Milk Thistle, Dandelion Root, Organic Turmeric and Artichoke Extract for Liver Health – Silymarin Milk Thistle Detox Capsules
• 2. Ancestral Supplements Grass Fed Beef Liver Capsules. Supports Energy Production, Detoxification, Digestion, Immunity and Full Body Wellness, Non-GMO, Freeze Dried Liver Health Supplement, 180 Capsules
• 3. Bronson Milk Thistle 1,000 mg Silymarin Marianum & Dandelion Root Liver Health Support, 120 Capsules
• 4. PUREHEALTH RESEARCH Liver Supplement – Herbal Liver Cleanse Detox & Repair with Milk Thistle, Artichoke Extract, Dandelion Root, Turmeric, Berberine to Healthy Liver Renew with 11 Natural Nutrients
• 5. TUDCA Bile Salts Liver Support Supplement, 500-mg Servings, Liver and Gallbladder Cleanse Supplement (60 Capsules 250 mg) Genuine Bile Acid. TUDCA Strong Bitter Taste by Double Wood
• 6. 28-in-1 Liver Cleanse Detox & Repair Fatty Liver Formula, Milk Thistle Silymarin, Artichoke Extract, Dandelion & Apple Cider Vinegar – Liver Health Supplement Support Pills – Vegan Capsules
• 7. Vita-Liver Liver Health Supplement – Support Liver Cleanse & Detox – Liquid Delivery for Absorption – Milk Thistle, Artichoke, Chanca Piedra, Dandelion & More
• 8. Liver Supplement with Milk Thistle, Liver Detox Formula, Artichoke and Turmeric. Supports Liver Health Defense & Liver Renew. Liver Cleanse Detox & Repair for Fatty Liver Support. 60 Capsules
• 9. Liver Cleanse Detox & Repair. Milk Thistle Extract with Silymarin 80%, Artichoke Extract, Dandelion Root, Chicory, 25+ Herbs – Premium Liver Health Formula, Liver Support Detox Health Formula – Liver Support Detox Cleanse Supplement
• 10. Arazo Nutrition Liver Cleanse Detox & Repair Formula – Milk Thistle Herbal Support Supplement: Silymarin, Beet, Artichoke, Dandelion, Chicory Root

The investigators found a total of 65 unique ingredients. “Most of these ingredients have historical uses linked to liver health. But our research revealed that strong scientific evidence supporting the efficacy of any of these supplements is currently lacking,” Dr. Eltelbany said. They started the study by creating a new account on Amazon to make sure the search would not be influenced by prior shopping or purchases. They next searched for supplements using the keywords “liver” and “cleanse.” To figure out sales numbers, they used the AMZScout proprietary analytics software that Amazon sellers use to track sales. 
 

Reviewing the reviews

The researchers discovered an average 11,526 reviews for each supplement product. The average rating was 4.42 stars out of 5. 

Using Fakespot.com, proprietary Amazon customer review software that analyzes the timing and language of reviews, they found that only 65% of product reviews were genuine. 

“We felt it was crucial to vet the authenticity of customer feedback,” Dr. Eltelbany said.
 

Few other options?

Liver disease remains a persistent and significant global health burden. Despite advances in many areas of gastroenterology, there remains no curative treatment for liver cirrhosis, Dr. Eltelbany said. 

The primary option for people with end-stage liver disease is a liver transplant. “However, given the scarcity of donors and the vast number of patients in need, many individuals, unfortunately, do not get a timely transplant,” he said. “This void of treatment options and the desperation to find relief often drives patients towards alternative therapies.”

Also, online shopping has made getting these supplements “as simple as a click away. But what’s more concerning is the trust placed in these products by our patients,” Dr. Eltelbany said.

“There’s a strong need for rigorous scientific investigation into the actual health benefits of any liver detox supplements,” he said. “Above all, patient education remains paramount, warning them of potential risks and unknowns of these supplements.”

A version of this article appeared on WebMD.com.

The 10 best-selling liver health supplements on Amazon bring in an estimated $2.5 million each month. But none of them contain ingredients recommended by major groups of doctors who treat liver issues in the United States or Europe.

Like many supplements, popular online liver products are unregulated, meaning they do not have to meet the same safety and effectiveness standards as prescription medications. 

Sales of liver supplements are growing, particularly in the last few years, said Ahmed Eltelbany, MD, MPH, a first-year gastrointestinal fellow at the University of New Mexico. One reason could be increased alcohol use during the COVID-19 pandemic.

Some manufacturers make bold claims on Amazon, said Dr. Eltelbany, author of a study that looked into the supplements. “The most recurrent claims were that their supplements maintain normal liver function, are scientifically formulated, and – my personal favorite – are a highly effective liver detox formulation developed according to the latest scientific findings.”

While these claims might sound reassuring and scientifically grounded to an average consumer, he said, most of them are not backed up by rigorous clinical research.
 

Does natural mean safe?

Many supplements are marketed as “liver cleansing,” for “liver detox,” or for “liver support,” Dr. Eltelbany said as he presented the study results at the annual meeting of the American College of Gastroenterology. 

“People take these supplements because they believe they’re natural and therefore they’re safe,” said Paul Y. Kwo, MD, who moderated a session on the study at the meeting, when asked to comment. “As I tell every patient in clinic, a great white shark is natural, a scorpion is natural, and so is a hurricane. So just because they’re natural doesn’t mean they’re safe.”

At the same time, “it’s not that every supplement is bad for you. Nonetheless, there’s just a dizzying array of these out there” said Dr. Kwo, a professor of medicine at Stanford Medicine in Redwood, Calif.

“We have to be very cautious,” he said. For example, some people might believe that “if a little bit of a supplement is good, a tremendous amount must be really good.” The antioxidant turmeric, for example, has a pretty good safety record, he said. But this past year, some liver toxicity concerns arose about preparations with “very, very high concentrations” of turmeric. 
 

The top 10 sellers

Dr. Eltelbany and colleagues studied prices for 1-month supplies, monthly sales, and revenue for the top 10 liver supplements sold on Amazon on June 3, 2023:

Ranking by sales:

• 1. Liver Cleanse Detox & Repair Formula – Herbal Liver Supplement with Milk Thistle, Dandelion Root, Organic Turmeric and Artichoke Extract for Liver Health – Silymarin Milk Thistle Detox Capsules
• 2. Ancestral Supplements Grass Fed Beef Liver Capsules. Supports Energy Production, Detoxification, Digestion, Immunity and Full Body Wellness, Non-GMO, Freeze Dried Liver Health Supplement, 180 Capsules
• 3. Bronson Milk Thistle 1,000 mg Silymarin Marianum & Dandelion Root Liver Health Support, 120 Capsules
• 4. PUREHEALTH RESEARCH Liver Supplement – Herbal Liver Cleanse Detox & Repair with Milk Thistle, Artichoke Extract, Dandelion Root, Turmeric, Berberine to Healthy Liver Renew with 11 Natural Nutrients
• 5. TUDCA Bile Salts Liver Support Supplement, 500-mg Servings, Liver and Gallbladder Cleanse Supplement (60 Capsules 250 mg) Genuine Bile Acid. TUDCA Strong Bitter Taste by Double Wood
• 6. 28-in-1 Liver Cleanse Detox & Repair Fatty Liver Formula, Milk Thistle Silymarin, Artichoke Extract, Dandelion & Apple Cider Vinegar – Liver Health Supplement Support Pills – Vegan Capsules
• 7. Vita-Liver Liver Health Supplement – Support Liver Cleanse & Detox – Liquid Delivery for Absorption – Milk Thistle, Artichoke, Chanca Piedra, Dandelion & More
• 8. Liver Supplement with Milk Thistle, Liver Detox Formula, Artichoke and Turmeric. Supports Liver Health Defense & Liver Renew. Liver Cleanse Detox & Repair for Fatty Liver Support. 60 Capsules
• 9. Liver Cleanse Detox & Repair. Milk Thistle Extract with Silymarin 80%, Artichoke Extract, Dandelion Root, Chicory, 25+ Herbs – Premium Liver Health Formula, Liver Support Detox Health Formula – Liver Support Detox Cleanse Supplement
• 10. Arazo Nutrition Liver Cleanse Detox & Repair Formula – Milk Thistle Herbal Support Supplement: Silymarin, Beet, Artichoke, Dandelion, Chicory Root

The investigators found a total of 65 unique ingredients. “Most of these ingredients have historical uses linked to liver health. But our research revealed that strong scientific evidence supporting the efficacy of any of these supplements is currently lacking,” Dr. Eltelbany said. They started the study by creating a new account on Amazon to make sure the search would not be influenced by prior shopping or purchases. They next searched for supplements using the keywords “liver” and “cleanse.” To figure out sales numbers, they used the AMZScout proprietary analytics software that Amazon sellers use to track sales. 
 

Reviewing the reviews

The researchers discovered an average 11,526 reviews for each supplement product. The average rating was 4.42 stars out of 5. 

Using Fakespot.com, proprietary Amazon customer review software that analyzes the timing and language of reviews, they found that only 65% of product reviews were genuine. 

“We felt it was crucial to vet the authenticity of customer feedback,” Dr. Eltelbany said.
 

Few other options?

Liver disease remains a persistent and significant global health burden. Despite advances in many areas of gastroenterology, there remains no curative treatment for liver cirrhosis, Dr. Eltelbany said. 

The primary option for people with end-stage liver disease is a liver transplant. “However, given the scarcity of donors and the vast number of patients in need, many individuals, unfortunately, do not get a timely transplant,” he said. “This void of treatment options and the desperation to find relief often drives patients towards alternative therapies.”

Also, online shopping has made getting these supplements “as simple as a click away. But what’s more concerning is the trust placed in these products by our patients,” Dr. Eltelbany said.

“There’s a strong need for rigorous scientific investigation into the actual health benefits of any liver detox supplements,” he said. “Above all, patient education remains paramount, warning them of potential risks and unknowns of these supplements.”

A version of this article appeared on WebMD.com.

Patients age 65 and older who receive thyroid hormone therapy and experience low thyrotropin are at increased risk for dementia and other cognitive problems, according to new research published in JAMA Internal Medicine.

The study found that these patients with thyrotoxicosis had a higher likelihood of incident cognitive disorder (adjusted hazard ratio, 1.39; 95% confidence interval, 1.18-1.64; P < .001). Broken down between internal and external causes of thyrotoxicosis, exogenous thyrotoxicosis continued to be a significant risk factor (aHR, 1.34: 95% CI, 1.10-1.63; P = .003), while endogenous thyrotoxicosis did not show a statistically significant risk estimates (aHR, 1.38; 95% CI, 0.96-1.98; P = .08).

The study also found that women were more likely to have low levels of thyrotropin (thyroid-stimulating hormone/TSH) than men and were more likely to be overtreated.

Previous studies looking at the correlation between hyperthyroidism and cognitive disorders often did not include participants who were already taking thyroid hormones, according to Jennifer S. Mammen, MD, PhD, assistant professor of medicine at the Asthma and Allergy Center at John Hopkins University, Baltimore, and the senior author of the study.

“The fact that we see the signal both in people who are being overtreated with thyroid hormone and in people who have endogenous hyperthyroidism is one way that we think that this supports the fact that it’s not just confounding, it’s not just bias,” Dr. Mammen said. “There’s two different sources of hyperthyroidism, and they’re both showing the same relationship.”

In the study, Dr. Mammen and colleagues analyzed electronic health records for patients aged 65 years and older who received primary care in the Johns Hopkins Community Physicians Network over a 10-year period starting in 2014. Patients had to have a minimum of two visits 30 days apart. None had a history of low TSH levels or cognitive disorder diagnoses within 6 months of their first doctor visit.

More than 65,000 patients were included in the study. Slightly more than half (56%) were female, almost 70% were White, 19.3% were Black, 4.6% were Asian, and 0.4% were American Indian. Almost 25,000 low TSH measurements among 2,710 patients were recorded during the study period. The majority of low TSH measurements were exogenous (14,875), followed by origins of unknown cause (5,833), and endogenous (4,159).

During the follow-up period, 7.2% (4,779) patients received a new cognitive disorder diagnosis, which was dementia in 77% of cases.

Dr. Mammen said primary care physicians should carefully consider whether thyroid hormone therapy is necessary for older patients, and, if so, great care should be taken to avoid overtreatment.

“This is yet another reason for us to be vigilant about not overtreating people with thyroid hormone, especially in older adults,” Dr. Mammen said. “We already know that atrial fibrillation rates are increased in people who are hyperthyroid. We know that fracture and osteoporosis is affected by hyperthyroidism. And now we also have an association with higher rates of cognitive disorders.”

Taking a cautious approach to prescribing thyroid hormone therapy for older patients is paramount, according to Jean Chen, MD, partner at Texas Diabetes & Endocrinology, who was not affiliated with the study.

“All medical providers need to be aware that the 65 and older population does not need to be treated as aggressively with their thyroid hormone,” Dr. Chen said. “We are finding more and more complications from overtreatment rather than benefit in this population.”

Often, older patients may complain of symptoms such as constipation, feeling cold, or tiredness, which can be symptoms of hypothyroidism. But these symptoms could also be from anemia, vitamin deficiencies, depression, perimenopause, menopause, insulin resistance, and sleep apnea. If necessary, Dr. Chen recommended primary care physicians consult with an endocrinologist regarding a possible treatment plan and making a differential diagnosis.

In addition, Dr. Chen said other studies have shown that treating patients with thyroid hormone either did not resolve the condition or negatively impacted anxiety, muscle strength, and bone density, or it increased the risk for arrhythmia. Therefore, it’s important to weight the risks versus the benefits.

“There’s so much gray zone here,” Dr. Chen said.

The study was supported by the Richman Family Precision Medicine Center of Excellence in Alzheimer’s Disease, the Richman Family Foundation, the Rick Sharp Alzheimer’s Foundation, the Sharp Family Foundation, among others. The work was also supported by grants from the National Institutes of Health. One coauthor reported personal fees from Karuna, MapLight Therapeutics, Axsome Therapeutics, GIA, GW Research Limited, Merck, EXCIVA, Otsuka, IntraCellular Therapies, and Medesis Pharma for consulting for treatment development in Alzheimer’s disease outside the submitted work. No other disclosures were reported.

A version of this article appeared on Medscape.com.

Patients age 65 and older who receive thyroid hormone therapy and experience low thyrotropin are at increased risk for dementia and other cognitive problems, according to new research published in JAMA Internal Medicine.

The study found that these patients with thyrotoxicosis had a higher likelihood of incident cognitive disorder (adjusted hazard ratio, 1.39; 95% confidence interval, 1.18-1.64; P < .001). Broken down between internal and external causes of thyrotoxicosis, exogenous thyrotoxicosis continued to be a significant risk factor (aHR, 1.34: 95% CI, 1.10-1.63; P = .003), while endogenous thyrotoxicosis did not show a statistically significant risk estimates (aHR, 1.38; 95% CI, 0.96-1.98; P = .08).

The study also found that women were more likely to have low levels of thyrotropin (thyroid-stimulating hormone/TSH) than men and were more likely to be overtreated.

Previous studies looking at the correlation between hyperthyroidism and cognitive disorders often did not include participants who were already taking thyroid hormones, according to Jennifer S. Mammen, MD, PhD, assistant professor of medicine at the Asthma and Allergy Center at John Hopkins University, Baltimore, and the senior author of the study.

“The fact that we see the signal both in people who are being overtreated with thyroid hormone and in people who have endogenous hyperthyroidism is one way that we think that this supports the fact that it’s not just confounding, it’s not just bias,” Dr. Mammen said. “There’s two different sources of hyperthyroidism, and they’re both showing the same relationship.”

In the study, Dr. Mammen and colleagues analyzed electronic health records for patients aged 65 years and older who received primary care in the Johns Hopkins Community Physicians Network over a 10-year period starting in 2014. Patients had to have a minimum of two visits 30 days apart. None had a history of low TSH levels or cognitive disorder diagnoses within 6 months of their first doctor visit.

More than 65,000 patients were included in the study. Slightly more than half (56%) were female, almost 70% were White, 19.3% were Black, 4.6% were Asian, and 0.4% were American Indian. Almost 25,000 low TSH measurements among 2,710 patients were recorded during the study period. The majority of low TSH measurements were exogenous (14,875), followed by origins of unknown cause (5,833), and endogenous (4,159).

During the follow-up period, 7.2% (4,779) patients received a new cognitive disorder diagnosis, which was dementia in 77% of cases.

Dr. Mammen said primary care physicians should carefully consider whether thyroid hormone therapy is necessary for older patients, and, if so, great care should be taken to avoid overtreatment.

“This is yet another reason for us to be vigilant about not overtreating people with thyroid hormone, especially in older adults,” Dr. Mammen said. “We already know that atrial fibrillation rates are increased in people who are hyperthyroid. We know that fracture and osteoporosis is affected by hyperthyroidism. And now we also have an association with higher rates of cognitive disorders.”

Taking a cautious approach to prescribing thyroid hormone therapy for older patients is paramount, according to Jean Chen, MD, partner at Texas Diabetes & Endocrinology, who was not affiliated with the study.

“All medical providers need to be aware that the 65 and older population does not need to be treated as aggressively with their thyroid hormone,” Dr. Chen said. “We are finding more and more complications from overtreatment rather than benefit in this population.”

Often, older patients may complain of symptoms such as constipation, feeling cold, or tiredness, which can be symptoms of hypothyroidism. But these symptoms could also be from anemia, vitamin deficiencies, depression, perimenopause, menopause, insulin resistance, and sleep apnea. If necessary, Dr. Chen recommended primary care physicians consult with an endocrinologist regarding a possible treatment plan and making a differential diagnosis.

In addition, Dr. Chen said other studies have shown that treating patients with thyroid hormone either did not resolve the condition or negatively impacted anxiety, muscle strength, and bone density, or it increased the risk for arrhythmia. Therefore, it’s important to weight the risks versus the benefits.

“There’s so much gray zone here,” Dr. Chen said.

The study was supported by the Richman Family Precision Medicine Center of Excellence in Alzheimer’s Disease, the Richman Family Foundation, the Rick Sharp Alzheimer’s Foundation, the Sharp Family Foundation, among others. The work was also supported by grants from the National Institutes of Health. One coauthor reported personal fees from Karuna, MapLight Therapeutics, Axsome Therapeutics, GIA, GW Research Limited, Merck, EXCIVA, Otsuka, IntraCellular Therapies, and Medesis Pharma for consulting for treatment development in Alzheimer’s disease outside the submitted work. No other disclosures were reported.

A version of this article appeared on Medscape.com.

Patients age 65 and older who receive thyroid hormone therapy and experience low thyrotropin are at increased risk for dementia and other cognitive problems, according to new research published in JAMA Internal Medicine.

The study found that these patients with thyrotoxicosis had a higher likelihood of incident cognitive disorder (adjusted hazard ratio, 1.39; 95% confidence interval, 1.18-1.64; P < .001). Broken down between internal and external causes of thyrotoxicosis, exogenous thyrotoxicosis continued to be a significant risk factor (aHR, 1.34: 95% CI, 1.10-1.63; P = .003), while endogenous thyrotoxicosis did not show a statistically significant risk estimates (aHR, 1.38; 95% CI, 0.96-1.98; P = .08).

The study also found that women were more likely to have low levels of thyrotropin (thyroid-stimulating hormone/TSH) than men and were more likely to be overtreated.

Previous studies looking at the correlation between hyperthyroidism and cognitive disorders often did not include participants who were already taking thyroid hormones, according to Jennifer S. Mammen, MD, PhD, assistant professor of medicine at the Asthma and Allergy Center at John Hopkins University, Baltimore, and the senior author of the study.

“The fact that we see the signal both in people who are being overtreated with thyroid hormone and in people who have endogenous hyperthyroidism is one way that we think that this supports the fact that it’s not just confounding, it’s not just bias,” Dr. Mammen said. “There’s two different sources of hyperthyroidism, and they’re both showing the same relationship.”

In the study, Dr. Mammen and colleagues analyzed electronic health records for patients aged 65 years and older who received primary care in the Johns Hopkins Community Physicians Network over a 10-year period starting in 2014. Patients had to have a minimum of two visits 30 days apart. None had a history of low TSH levels or cognitive disorder diagnoses within 6 months of their first doctor visit.

More than 65,000 patients were included in the study. Slightly more than half (56%) were female, almost 70% were White, 19.3% were Black, 4.6% were Asian, and 0.4% were American Indian. Almost 25,000 low TSH measurements among 2,710 patients were recorded during the study period. The majority of low TSH measurements were exogenous (14,875), followed by origins of unknown cause (5,833), and endogenous (4,159).

During the follow-up period, 7.2% (4,779) patients received a new cognitive disorder diagnosis, which was dementia in 77% of cases.

Dr. Mammen said primary care physicians should carefully consider whether thyroid hormone therapy is necessary for older patients, and, if so, great care should be taken to avoid overtreatment.

“This is yet another reason for us to be vigilant about not overtreating people with thyroid hormone, especially in older adults,” Dr. Mammen said. “We already know that atrial fibrillation rates are increased in people who are hyperthyroid. We know that fracture and osteoporosis is affected by hyperthyroidism. And now we also have an association with higher rates of cognitive disorders.”

Taking a cautious approach to prescribing thyroid hormone therapy for older patients is paramount, according to Jean Chen, MD, partner at Texas Diabetes & Endocrinology, who was not affiliated with the study.

“All medical providers need to be aware that the 65 and older population does not need to be treated as aggressively with their thyroid hormone,” Dr. Chen said. “We are finding more and more complications from overtreatment rather than benefit in this population.”

Often, older patients may complain of symptoms such as constipation, feeling cold, or tiredness, which can be symptoms of hypothyroidism. But these symptoms could also be from anemia, vitamin deficiencies, depression, perimenopause, menopause, insulin resistance, and sleep apnea. If necessary, Dr. Chen recommended primary care physicians consult with an endocrinologist regarding a possible treatment plan and making a differential diagnosis.

In addition, Dr. Chen said other studies have shown that treating patients with thyroid hormone either did not resolve the condition or negatively impacted anxiety, muscle strength, and bone density, or it increased the risk for arrhythmia. Therefore, it’s important to weight the risks versus the benefits.

“There’s so much gray zone here,” Dr. Chen said.

The study was supported by the Richman Family Precision Medicine Center of Excellence in Alzheimer’s Disease, the Richman Family Foundation, the Rick Sharp Alzheimer’s Foundation, the Sharp Family Foundation, among others. The work was also supported by grants from the National Institutes of Health. One coauthor reported personal fees from Karuna, MapLight Therapeutics, Axsome Therapeutics, GIA, GW Research Limited, Merck, EXCIVA, Otsuka, IntraCellular Therapies, and Medesis Pharma for consulting for treatment development in Alzheimer’s disease outside the submitted work. No other disclosures were reported.

A version of this article appeared on Medscape.com.