Some, perhaps many, previously unrecognized cases of atrial fibrillation (AF) will come to light in a screening program aimed at older asymptomatic adults. The key question is whether the challenges of such systematic but age-restricted AF screening in the community, with oral anticoagulation (OAC) offered to those found to have the arrhythmia, is worthwhile in preventing events such as death or stroke.
 

Now there is evidence supporting such a clinical benefit from a large, prospective, randomized trial. A screening program restricted to people 75 or 76 years of age in two Swedish communities, which called on them to use a handheld single-lead ECG system at home intermittently for 2 weeks, was followed by a slight drop in clinical events over about 7 years.

The 4% decline in risk (P = .045) in the STROKESTOP trial’s “intention-to-treat” (ITT) analysis yielded a number needed to treat of 91; that is, that many people had to be targeted by the screening program to prevent one primary-endpoint clinical event.

Those included ischemic stroke, systemic thromboembolism, hospitalization for severe bleeding, and death from any cause, investigators reported April 23 during the virtual European Heart Rhythm Association (EHRA) 2021 Congress.

If that benefit and its significance seem marginal, some secondary findings might be reassuring. Half the population of the target age in the two communities – 13,979 randomly selected people – were invited to join the trial and follow the screening protocol, comprising the ITT cohort. The other half, numbering 13,996, was not invited and served as control subjects.

However, only 51% of the ITT cohort accepted the invitation and participated in the trial; they represented the “as-treated” cohort, observed Emma Svennberg, MD, PhD, Karolinska Institute, Danderyd Hospital, Stockholm, who presented the analysis at the EHRA sessions.

The screening protocol identified untreated AF, whether previously known or unknown, in about 5% of the 7,165 as-treated screening participants; OAC was initiated in about three-fourths of those cases.

The as-treated group, on their own, benefited with a 24% drop in the prospectively defined secondary endpoint of ischemic stroke, compared with the entire control group.

The clinical benefit in the ITT population was “small but significant,” but over the same period in the as-treated cohort, there was a highly significant drop in risk for ischemic stroke, Dr. Svennberg said in an interview.

The trial’s lead message, she said, is that “screening for atrial fibrillation in an elderly population reduces the risk of death and ischemic stroke without increasing the risk of bleeding.”
 

Caveats: As-treated vs. ITT

But there are caveats that complicate interpretation of the trial and, Dr. Svennberg proposed, point to the importance of that interpretation of both the ITT and as-treated analyses.

“We detected significantly more atrial fibrillation in the group that was randomized to screening. A major strength of our study was that we referred all of those individuals for a structured follow-up within the study,” she said. “Although the focus of the follow-up was oral anticoagulant therapy, other risk factors were also assessed and managed, such as hypertension and diabetes.”

It’s possible that increased detection of AF followed by such structured management contributed to the observed benefit, Dr. Svennberg proposed.

However, the exclusion of those in the prespecified ITT population who declined to be screened or otherwise didn’t participate left an as-treated cohort that was healthier than the ITT population or the control group.

Indeed, the nonparticipating invitees were sicker, with significantly more diabetes, vascular disease, hypertension, and heart failure, and higher CHA2DS2VASc stroke risk scores than those who agreed to participate.

“We took a more difficult route in setting up this study, in that we identified all individuals aged 75 to 76 residing in our two regions and excluded no one,” Dr. Svennberg said in an interview. “That means even individuals with end-stage disease, severe dementia, bedridden in nursing homes, et cetera, were also randomized but perhaps not likely or eligible to participate.”

Therefore, some invitees were unable to join the study even as others might have declined “out of low interest” or other personal reasons, she said. “We believe that this mimics how a population-based screening program would be performed if done in our country.”

In the ITT analysis, screening successfully identified previously unknown or untreated cases of AF, which led to expanded OAC use and intensified risk-factor management, “which was key to a successful outcome.”

In the as-treated analysis, Dr. Svennberg said, “I think a combination of the intervention and the population being overall more healthy was driving the secondary endpoint.”
 

Systematic vs. opportunistic screening

Although “opportunistic screening in individuals aged 65 and older” is recommended by current European Society of Cardiology guidelines, systematic screening, such as that used in STROKESTOP, has a much weaker evidence base, observed Renate B. Schnabel, MD, PhD, University Heart & Vascular Center, Hamburg, Germany, as the invited discussant after the STROKESTOP presentation.

STROKESTOP “is one of the first studies, if not the first study,” to show a clinical benefit from screening for AF, Dr. Schnabel said.

Fewer-than-projected primary outcome events were seen during the trial, and event curves for screened and control participants didn’t start to separate until about 4 years into the study, she said. It therefore might take a long time for the screened elderly to realize the clinical benefits of screening.

Studies such as the recent SCREEN-AF and mSTOPS have amply shown that AF screening in the asymptomatic elderly can reveal previously unrecognized AF far more often than would be detected in routine practice, allowing them the opportunity to go on OAC. But the trials weren’t able to show whether the benefits of such management outweigh the risks or costs.

Indeed, on April 20, the U.S. Preventive Services Task Force (USPSTF) released a draft recommendation statement concluding that “the current evidence is insufficient to assess the balance of benefits and harms” associated with AF screening in asymptomatic people at least 50 years of age.

In STROKESTOP, however, benefit for the primary outcome reached significance in the prespecified ITT analysis and “appeared to be driven by the reduction in ischemic stroke incidence,” Dr. Schnabel said.

“The future guidelines have gained strong evidence to judge on systematic atrial fibrillation screening” as it was performed in the trial, she said. “How to implement atrial fibrillation screening, including systematic screening in health care systems across Europe and beyond, remains an open question.”
 

A randomized population

STROKESTOP considered all 75- and 76-year-olds living in Sweden’s Stockholm County (n = 23,888) and the Halland region (n = 4,880) and randomly assigned them to the ITT group or a control group, with stratification by sex, birth year, and geographic region. In both groups, 54.6% were female and the mean CHA2DS2VASc score was 3.5.

People assigned to the ITT cohort were invited to be screened and followed. Those who agreed to participate underwent a baseline ECG assessment to detect or rule out permanent AF. Guideline-based OAC and follow-up was offered to those found with the arrhythmia. Those in sinus rhythm with no history of AF used a handheld single-lead ECG recorder (Zenicor) for 30 seconds twice daily for 14 days.

Structured management, including OAC, was offered to anyone demonstrating sufficient AF, that is, at least one bout without p waves in one 30-second recording or at least two such episodes lasting 10-29 seconds during the 2-week screening period.

In the ITT analysis, the hazard ratio (HR) for the composite clinical primary endpoint was 0.96 (95% confidence interval, 0.920-0.999; P = .045), but in the as-treated analysis, the HR for ischemic stroke was 0.76 (95% CI, 0.68-0.87; P < .001).

“I believe that this will likely be generalizable to most countries’ elderly residents,” Dr. Svennberg said. “I think if we can find a significant difference in our elderly population in Sweden, most countries will be able to do so, or find even more significant results.”

That’s because “baseline detection of AF in Sweden is high,” she said, “so new detection is likely more difficult.” Also, in Sweden, “care can be sought without monetary concern, and prescriptions are provided at low costs to the patients.” Therefore, patients newly identified with AF, whether in studies or not, “would likely be started on therapy.”

It will be important to know whether the screening strategy is cost-effective, Dr. Schnabel said, because “the overall effect, with a hazard ratio of 0.96, is not too big, and costs incurred by systematic screening are comparatively high.”

STROKESTOP “now provides sound information for cost-effectiveness analyses, which to date have largely relied on assumptions.”

STROKESTOP was partially supported by Carl Bennet AB, Boehringer-Ingelheim, Bayer, Bristol-Meyers Squibb, and Pfizer. Dr. Svennberg disclosed receiving fees for lectures or consulting from Bayer, Bristol-Meyers Squibb, Pfizer, Boehringer-Ingelheim, Merck Sharp & Dohme, and Sanofi; and institutional grants from Roche Diagnostics and Carl Bennett Ltd.

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

Some, perhaps many, previously unrecognized cases of atrial fibrillation (AF) will come to light in a screening program aimed at older asymptomatic adults. The key question is whether the challenges of such systematic but age-restricted AF screening in the community, with oral anticoagulation (OAC) offered to those found to have the arrhythmia, is worthwhile in preventing events such as death or stroke.
 

Now there is evidence supporting such a clinical benefit from a large, prospective, randomized trial. A screening program restricted to people 75 or 76 years of age in two Swedish communities, which called on them to use a handheld single-lead ECG system at home intermittently for 2 weeks, was followed by a slight drop in clinical events over about 7 years.

The 4% decline in risk (P = .045) in the STROKESTOP trial’s “intention-to-treat” (ITT) analysis yielded a number needed to treat of 91; that is, that many people had to be targeted by the screening program to prevent one primary-endpoint clinical event.

Those included ischemic stroke, systemic thromboembolism, hospitalization for severe bleeding, and death from any cause, investigators reported April 23 during the virtual European Heart Rhythm Association (EHRA) 2021 Congress.

If that benefit and its significance seem marginal, some secondary findings might be reassuring. Half the population of the target age in the two communities – 13,979 randomly selected people – were invited to join the trial and follow the screening protocol, comprising the ITT cohort. The other half, numbering 13,996, was not invited and served as control subjects.

However, only 51% of the ITT cohort accepted the invitation and participated in the trial; they represented the “as-treated” cohort, observed Emma Svennberg, MD, PhD, Karolinska Institute, Danderyd Hospital, Stockholm, who presented the analysis at the EHRA sessions.

The screening protocol identified untreated AF, whether previously known or unknown, in about 5% of the 7,165 as-treated screening participants; OAC was initiated in about three-fourths of those cases.

The as-treated group, on their own, benefited with a 24% drop in the prospectively defined secondary endpoint of ischemic stroke, compared with the entire control group.

The clinical benefit in the ITT population was “small but significant,” but over the same period in the as-treated cohort, there was a highly significant drop in risk for ischemic stroke, Dr. Svennberg said in an interview.

The trial’s lead message, she said, is that “screening for atrial fibrillation in an elderly population reduces the risk of death and ischemic stroke without increasing the risk of bleeding.”
 

Caveats: As-treated vs. ITT

But there are caveats that complicate interpretation of the trial and, Dr. Svennberg proposed, point to the importance of that interpretation of both the ITT and as-treated analyses.

“We detected significantly more atrial fibrillation in the group that was randomized to screening. A major strength of our study was that we referred all of those individuals for a structured follow-up within the study,” she said. “Although the focus of the follow-up was oral anticoagulant therapy, other risk factors were also assessed and managed, such as hypertension and diabetes.”

It’s possible that increased detection of AF followed by such structured management contributed to the observed benefit, Dr. Svennberg proposed.

However, the exclusion of those in the prespecified ITT population who declined to be screened or otherwise didn’t participate left an as-treated cohort that was healthier than the ITT population or the control group.

Indeed, the nonparticipating invitees were sicker, with significantly more diabetes, vascular disease, hypertension, and heart failure, and higher CHA2DS2VASc stroke risk scores than those who agreed to participate.

“We took a more difficult route in setting up this study, in that we identified all individuals aged 75 to 76 residing in our two regions and excluded no one,” Dr. Svennberg said in an interview. “That means even individuals with end-stage disease, severe dementia, bedridden in nursing homes, et cetera, were also randomized but perhaps not likely or eligible to participate.”

Therefore, some invitees were unable to join the study even as others might have declined “out of low interest” or other personal reasons, she said. “We believe that this mimics how a population-based screening program would be performed if done in our country.”

In the ITT analysis, screening successfully identified previously unknown or untreated cases of AF, which led to expanded OAC use and intensified risk-factor management, “which was key to a successful outcome.”

In the as-treated analysis, Dr. Svennberg said, “I think a combination of the intervention and the population being overall more healthy was driving the secondary endpoint.”
 

Systematic vs. opportunistic screening

Although “opportunistic screening in individuals aged 65 and older” is recommended by current European Society of Cardiology guidelines, systematic screening, such as that used in STROKESTOP, has a much weaker evidence base, observed Renate B. Schnabel, MD, PhD, University Heart & Vascular Center, Hamburg, Germany, as the invited discussant after the STROKESTOP presentation.

STROKESTOP “is one of the first studies, if not the first study,” to show a clinical benefit from screening for AF, Dr. Schnabel said.

Fewer-than-projected primary outcome events were seen during the trial, and event curves for screened and control participants didn’t start to separate until about 4 years into the study, she said. It therefore might take a long time for the screened elderly to realize the clinical benefits of screening.

Studies such as the recent SCREEN-AF and mSTOPS have amply shown that AF screening in the asymptomatic elderly can reveal previously unrecognized AF far more often than would be detected in routine practice, allowing them the opportunity to go on OAC. But the trials weren’t able to show whether the benefits of such management outweigh the risks or costs.

Indeed, on April 20, the U.S. Preventive Services Task Force (USPSTF) released a draft recommendation statement concluding that “the current evidence is insufficient to assess the balance of benefits and harms” associated with AF screening in asymptomatic people at least 50 years of age.

In STROKESTOP, however, benefit for the primary outcome reached significance in the prespecified ITT analysis and “appeared to be driven by the reduction in ischemic stroke incidence,” Dr. Schnabel said.

“The future guidelines have gained strong evidence to judge on systematic atrial fibrillation screening” as it was performed in the trial, she said. “How to implement atrial fibrillation screening, including systematic screening in health care systems across Europe and beyond, remains an open question.”
 

A randomized population

STROKESTOP considered all 75- and 76-year-olds living in Sweden’s Stockholm County (n = 23,888) and the Halland region (n = 4,880) and randomly assigned them to the ITT group or a control group, with stratification by sex, birth year, and geographic region. In both groups, 54.6% were female and the mean CHA2DS2VASc score was 3.5.

People assigned to the ITT cohort were invited to be screened and followed. Those who agreed to participate underwent a baseline ECG assessment to detect or rule out permanent AF. Guideline-based OAC and follow-up was offered to those found with the arrhythmia. Those in sinus rhythm with no history of AF used a handheld single-lead ECG recorder (Zenicor) for 30 seconds twice daily for 14 days.

Structured management, including OAC, was offered to anyone demonstrating sufficient AF, that is, at least one bout without p waves in one 30-second recording or at least two such episodes lasting 10-29 seconds during the 2-week screening period.

In the ITT analysis, the hazard ratio (HR) for the composite clinical primary endpoint was 0.96 (95% confidence interval, 0.920-0.999; P = .045), but in the as-treated analysis, the HR for ischemic stroke was 0.76 (95% CI, 0.68-0.87; P < .001).

“I believe that this will likely be generalizable to most countries’ elderly residents,” Dr. Svennberg said. “I think if we can find a significant difference in our elderly population in Sweden, most countries will be able to do so, or find even more significant results.”

That’s because “baseline detection of AF in Sweden is high,” she said, “so new detection is likely more difficult.” Also, in Sweden, “care can be sought without monetary concern, and prescriptions are provided at low costs to the patients.” Therefore, patients newly identified with AF, whether in studies or not, “would likely be started on therapy.”

It will be important to know whether the screening strategy is cost-effective, Dr. Schnabel said, because “the overall effect, with a hazard ratio of 0.96, is not too big, and costs incurred by systematic screening are comparatively high.”

STROKESTOP “now provides sound information for cost-effectiveness analyses, which to date have largely relied on assumptions.”

STROKESTOP was partially supported by Carl Bennet AB, Boehringer-Ingelheim, Bayer, Bristol-Meyers Squibb, and Pfizer. Dr. Svennberg disclosed receiving fees for lectures or consulting from Bayer, Bristol-Meyers Squibb, Pfizer, Boehringer-Ingelheim, Merck Sharp & Dohme, and Sanofi; and institutional grants from Roche Diagnostics and Carl Bennett Ltd.

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

Some, perhaps many, previously unrecognized cases of atrial fibrillation (AF) will come to light in a screening program aimed at older asymptomatic adults. The key question is whether the challenges of such systematic but age-restricted AF screening in the community, with oral anticoagulation (OAC) offered to those found to have the arrhythmia, is worthwhile in preventing events such as death or stroke.
 

Now there is evidence supporting such a clinical benefit from a large, prospective, randomized trial. A screening program restricted to people 75 or 76 years of age in two Swedish communities, which called on them to use a handheld single-lead ECG system at home intermittently for 2 weeks, was followed by a slight drop in clinical events over about 7 years.

The 4% decline in risk (P = .045) in the STROKESTOP trial’s “intention-to-treat” (ITT) analysis yielded a number needed to treat of 91; that is, that many people had to be targeted by the screening program to prevent one primary-endpoint clinical event.

Those included ischemic stroke, systemic thromboembolism, hospitalization for severe bleeding, and death from any cause, investigators reported April 23 during the virtual European Heart Rhythm Association (EHRA) 2021 Congress.

If that benefit and its significance seem marginal, some secondary findings might be reassuring. Half the population of the target age in the two communities – 13,979 randomly selected people – were invited to join the trial and follow the screening protocol, comprising the ITT cohort. The other half, numbering 13,996, was not invited and served as control subjects.

However, only 51% of the ITT cohort accepted the invitation and participated in the trial; they represented the “as-treated” cohort, observed Emma Svennberg, MD, PhD, Karolinska Institute, Danderyd Hospital, Stockholm, who presented the analysis at the EHRA sessions.

The screening protocol identified untreated AF, whether previously known or unknown, in about 5% of the 7,165 as-treated screening participants; OAC was initiated in about three-fourths of those cases.

The as-treated group, on their own, benefited with a 24% drop in the prospectively defined secondary endpoint of ischemic stroke, compared with the entire control group.

The clinical benefit in the ITT population was “small but significant,” but over the same period in the as-treated cohort, there was a highly significant drop in risk for ischemic stroke, Dr. Svennberg said in an interview.

The trial’s lead message, she said, is that “screening for atrial fibrillation in an elderly population reduces the risk of death and ischemic stroke without increasing the risk of bleeding.”
 

Caveats: As-treated vs. ITT

But there are caveats that complicate interpretation of the trial and, Dr. Svennberg proposed, point to the importance of that interpretation of both the ITT and as-treated analyses.

“We detected significantly more atrial fibrillation in the group that was randomized to screening. A major strength of our study was that we referred all of those individuals for a structured follow-up within the study,” she said. “Although the focus of the follow-up was oral anticoagulant therapy, other risk factors were also assessed and managed, such as hypertension and diabetes.”

It’s possible that increased detection of AF followed by such structured management contributed to the observed benefit, Dr. Svennberg proposed.

However, the exclusion of those in the prespecified ITT population who declined to be screened or otherwise didn’t participate left an as-treated cohort that was healthier than the ITT population or the control group.

Indeed, the nonparticipating invitees were sicker, with significantly more diabetes, vascular disease, hypertension, and heart failure, and higher CHA2DS2VASc stroke risk scores than those who agreed to participate.

“We took a more difficult route in setting up this study, in that we identified all individuals aged 75 to 76 residing in our two regions and excluded no one,” Dr. Svennberg said in an interview. “That means even individuals with end-stage disease, severe dementia, bedridden in nursing homes, et cetera, were also randomized but perhaps not likely or eligible to participate.”

Therefore, some invitees were unable to join the study even as others might have declined “out of low interest” or other personal reasons, she said. “We believe that this mimics how a population-based screening program would be performed if done in our country.”

In the ITT analysis, screening successfully identified previously unknown or untreated cases of AF, which led to expanded OAC use and intensified risk-factor management, “which was key to a successful outcome.”

In the as-treated analysis, Dr. Svennberg said, “I think a combination of the intervention and the population being overall more healthy was driving the secondary endpoint.”
 

Systematic vs. opportunistic screening

Although “opportunistic screening in individuals aged 65 and older” is recommended by current European Society of Cardiology guidelines, systematic screening, such as that used in STROKESTOP, has a much weaker evidence base, observed Renate B. Schnabel, MD, PhD, University Heart & Vascular Center, Hamburg, Germany, as the invited discussant after the STROKESTOP presentation.

STROKESTOP “is one of the first studies, if not the first study,” to show a clinical benefit from screening for AF, Dr. Schnabel said.

Fewer-than-projected primary outcome events were seen during the trial, and event curves for screened and control participants didn’t start to separate until about 4 years into the study, she said. It therefore might take a long time for the screened elderly to realize the clinical benefits of screening.

Studies such as the recent SCREEN-AF and mSTOPS have amply shown that AF screening in the asymptomatic elderly can reveal previously unrecognized AF far more often than would be detected in routine practice, allowing them the opportunity to go on OAC. But the trials weren’t able to show whether the benefits of such management outweigh the risks or costs.

Indeed, on April 20, the U.S. Preventive Services Task Force (USPSTF) released a draft recommendation statement concluding that “the current evidence is insufficient to assess the balance of benefits and harms” associated with AF screening in asymptomatic people at least 50 years of age.

In STROKESTOP, however, benefit for the primary outcome reached significance in the prespecified ITT analysis and “appeared to be driven by the reduction in ischemic stroke incidence,” Dr. Schnabel said.

“The future guidelines have gained strong evidence to judge on systematic atrial fibrillation screening” as it was performed in the trial, she said. “How to implement atrial fibrillation screening, including systematic screening in health care systems across Europe and beyond, remains an open question.”
 

A randomized population

STROKESTOP considered all 75- and 76-year-olds living in Sweden’s Stockholm County (n = 23,888) and the Halland region (n = 4,880) and randomly assigned them to the ITT group or a control group, with stratification by sex, birth year, and geographic region. In both groups, 54.6% were female and the mean CHA2DS2VASc score was 3.5.

People assigned to the ITT cohort were invited to be screened and followed. Those who agreed to participate underwent a baseline ECG assessment to detect or rule out permanent AF. Guideline-based OAC and follow-up was offered to those found with the arrhythmia. Those in sinus rhythm with no history of AF used a handheld single-lead ECG recorder (Zenicor) for 30 seconds twice daily for 14 days.

Structured management, including OAC, was offered to anyone demonstrating sufficient AF, that is, at least one bout without p waves in one 30-second recording or at least two such episodes lasting 10-29 seconds during the 2-week screening period.

In the ITT analysis, the hazard ratio (HR) for the composite clinical primary endpoint was 0.96 (95% confidence interval, 0.920-0.999; P = .045), but in the as-treated analysis, the HR for ischemic stroke was 0.76 (95% CI, 0.68-0.87; P < .001).

“I believe that this will likely be generalizable to most countries’ elderly residents,” Dr. Svennberg said. “I think if we can find a significant difference in our elderly population in Sweden, most countries will be able to do so, or find even more significant results.”

That’s because “baseline detection of AF in Sweden is high,” she said, “so new detection is likely more difficult.” Also, in Sweden, “care can be sought without monetary concern, and prescriptions are provided at low costs to the patients.” Therefore, patients newly identified with AF, whether in studies or not, “would likely be started on therapy.”

It will be important to know whether the screening strategy is cost-effective, Dr. Schnabel said, because “the overall effect, with a hazard ratio of 0.96, is not too big, and costs incurred by systematic screening are comparatively high.”

STROKESTOP “now provides sound information for cost-effectiveness analyses, which to date have largely relied on assumptions.”

STROKESTOP was partially supported by Carl Bennet AB, Boehringer-Ingelheim, Bayer, Bristol-Meyers Squibb, and Pfizer. Dr. Svennberg disclosed receiving fees for lectures or consulting from Bayer, Bristol-Meyers Squibb, Pfizer, Boehringer-Ingelheim, Merck Sharp & Dohme, and Sanofi; and institutional grants from Roche Diagnostics and Carl Bennett Ltd.

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

Motor and cognitive aspects of Parkinson’s disease are associated with discrete neural microcircuits within the brain’s basal ganglia, according to a new study using a mouse model of disease. 

Parkinson’s disease is characterized by a range of cognitive and motor symptoms, which appear at different disease stages. While recent research has pointed to specific neuronal subpopulations, or microcircuits, operating in the basal ganglia, researchers lacked a clear understanding of how they might correspond with specific symptom domains. 

In a study published online March 15 in Nature Neuroscience, lead author Varoth Lilascharoen, PhD, of the University of California, San Diego, and colleagues reported that two different neuronal subpopulations within the external globus pallidus, an important nucleus within the basal ganglia, are associated, respectively, with movement and with reversal learning (having to adapt to a reward pattern that is the reverse of a previous pattern). This is the first time, the investigators said, that the contributions of specific microcircuits in the basal ganglia have been linked to different behaviors.

Using electrophysiology, viral tracing, and other approaches, Dr. Lilascharoen and colleagues demonstrated that two microcircuits or populations of parvalbumin-expressing neurons could be manipulated to exacerbate or alleviate the motor or cognitive deficits in the dopamine-depleted mice. 

One of these microcircuits, made up of substantia nigra pars reticulata-projecting GPe-PV neurons, could be manipulated in ways that promoted or inhibited the mice’s movement. The other, which comprises parafascicular thalamus-projecting GPe-PV neurons, could be manipulated to affect reversal learning, the researchers found. Activation or inhibition of either circuit was not seen affecting function in the other. 

The results shed light on the functional organization of the different basal ganglia nuclei at the circuit level, and suggest, the authors argued, that differences in how different neuronal subpopulations adapt to dopamine loss could explain some of the patterns of progression seen in Parkinson’s disease.

The findings “establish the differential contributions from two distinct GPe-PV microcircuits in specific Parkinsonian-like behaviors linked to early and late stages of the disease,” Dr. Lilascharoen and colleagues wrote in their analysis. “[F]urther elucidation of the detailed connectivity of GPe subpopulations to their downstream targets … is needed to fully define the function of each microcircuit and design better therapeutic strategies for the various behavioral impairments of Parkinson’s disease.” 

Commenting on the research, Stefan Lang, MD, PhD, of the University of Calgary in Alberta said, “While Parkinson’s disease is often referred to as a movement disorder, it is well known that nonmotor symptoms, including cognitive and behavioral impairment, are common and debilitating. Impairment of basal ganglia function is known to contribute to these different symptom domains, though the specific circuits have never been elucidated. [Dr.] Lilascharoen et al. tease apart specific basal ganglia circuits associated with motor and behavioral symptoms, thereby providing evidence that distinct microcircuits might contribute to unique behaviours. As technological advances in neuromodulatory therapies continue to improve the spatial and temporal resolution of stimulation, future treatments may allow for specific targeting of behavioral impairment symptoms in Parkinson’s disease.”

Dr. Lilascharoen and Dr. Lang did not report outside funding or conflicts of interest.

Motor and cognitive aspects of Parkinson’s disease are associated with discrete neural microcircuits within the brain’s basal ganglia, according to a new study using a mouse model of disease. 

Parkinson’s disease is characterized by a range of cognitive and motor symptoms, which appear at different disease stages. While recent research has pointed to specific neuronal subpopulations, or microcircuits, operating in the basal ganglia, researchers lacked a clear understanding of how they might correspond with specific symptom domains. 

In a study published online March 15 in Nature Neuroscience, lead author Varoth Lilascharoen, PhD, of the University of California, San Diego, and colleagues reported that two different neuronal subpopulations within the external globus pallidus, an important nucleus within the basal ganglia, are associated, respectively, with movement and with reversal learning (having to adapt to a reward pattern that is the reverse of a previous pattern). This is the first time, the investigators said, that the contributions of specific microcircuits in the basal ganglia have been linked to different behaviors.

Using electrophysiology, viral tracing, and other approaches, Dr. Lilascharoen and colleagues demonstrated that two microcircuits or populations of parvalbumin-expressing neurons could be manipulated to exacerbate or alleviate the motor or cognitive deficits in the dopamine-depleted mice. 

One of these microcircuits, made up of substantia nigra pars reticulata-projecting GPe-PV neurons, could be manipulated in ways that promoted or inhibited the mice’s movement. The other, which comprises parafascicular thalamus-projecting GPe-PV neurons, could be manipulated to affect reversal learning, the researchers found. Activation or inhibition of either circuit was not seen affecting function in the other. 

The results shed light on the functional organization of the different basal ganglia nuclei at the circuit level, and suggest, the authors argued, that differences in how different neuronal subpopulations adapt to dopamine loss could explain some of the patterns of progression seen in Parkinson’s disease.

The findings “establish the differential contributions from two distinct GPe-PV microcircuits in specific Parkinsonian-like behaviors linked to early and late stages of the disease,” Dr. Lilascharoen and colleagues wrote in their analysis. “[F]urther elucidation of the detailed connectivity of GPe subpopulations to their downstream targets … is needed to fully define the function of each microcircuit and design better therapeutic strategies for the various behavioral impairments of Parkinson’s disease.” 

Commenting on the research, Stefan Lang, MD, PhD, of the University of Calgary in Alberta said, “While Parkinson’s disease is often referred to as a movement disorder, it is well known that nonmotor symptoms, including cognitive and behavioral impairment, are common and debilitating. Impairment of basal ganglia function is known to contribute to these different symptom domains, though the specific circuits have never been elucidated. [Dr.] Lilascharoen et al. tease apart specific basal ganglia circuits associated with motor and behavioral symptoms, thereby providing evidence that distinct microcircuits might contribute to unique behaviours. As technological advances in neuromodulatory therapies continue to improve the spatial and temporal resolution of stimulation, future treatments may allow for specific targeting of behavioral impairment symptoms in Parkinson’s disease.”

Dr. Lilascharoen and Dr. Lang did not report outside funding or conflicts of interest.

Motor and cognitive aspects of Parkinson’s disease are associated with discrete neural microcircuits within the brain’s basal ganglia, according to a new study using a mouse model of disease. 

Parkinson’s disease is characterized by a range of cognitive and motor symptoms, which appear at different disease stages. While recent research has pointed to specific neuronal subpopulations, or microcircuits, operating in the basal ganglia, researchers lacked a clear understanding of how they might correspond with specific symptom domains. 

In a study published online March 15 in Nature Neuroscience, lead author Varoth Lilascharoen, PhD, of the University of California, San Diego, and colleagues reported that two different neuronal subpopulations within the external globus pallidus, an important nucleus within the basal ganglia, are associated, respectively, with movement and with reversal learning (having to adapt to a reward pattern that is the reverse of a previous pattern). This is the first time, the investigators said, that the contributions of specific microcircuits in the basal ganglia have been linked to different behaviors.

Using electrophysiology, viral tracing, and other approaches, Dr. Lilascharoen and colleagues demonstrated that two microcircuits or populations of parvalbumin-expressing neurons could be manipulated to exacerbate or alleviate the motor or cognitive deficits in the dopamine-depleted mice. 

One of these microcircuits, made up of substantia nigra pars reticulata-projecting GPe-PV neurons, could be manipulated in ways that promoted or inhibited the mice’s movement. The other, which comprises parafascicular thalamus-projecting GPe-PV neurons, could be manipulated to affect reversal learning, the researchers found. Activation or inhibition of either circuit was not seen affecting function in the other. 

The results shed light on the functional organization of the different basal ganglia nuclei at the circuit level, and suggest, the authors argued, that differences in how different neuronal subpopulations adapt to dopamine loss could explain some of the patterns of progression seen in Parkinson’s disease.

The findings “establish the differential contributions from two distinct GPe-PV microcircuits in specific Parkinsonian-like behaviors linked to early and late stages of the disease,” Dr. Lilascharoen and colleagues wrote in their analysis. “[F]urther elucidation of the detailed connectivity of GPe subpopulations to their downstream targets … is needed to fully define the function of each microcircuit and design better therapeutic strategies for the various behavioral impairments of Parkinson’s disease.” 

Commenting on the research, Stefan Lang, MD, PhD, of the University of Calgary in Alberta said, “While Parkinson’s disease is often referred to as a movement disorder, it is well known that nonmotor symptoms, including cognitive and behavioral impairment, are common and debilitating. Impairment of basal ganglia function is known to contribute to these different symptom domains, though the specific circuits have never been elucidated. [Dr.] Lilascharoen et al. tease apart specific basal ganglia circuits associated with motor and behavioral symptoms, thereby providing evidence that distinct microcircuits might contribute to unique behaviours. As technological advances in neuromodulatory therapies continue to improve the spatial and temporal resolution of stimulation, future treatments may allow for specific targeting of behavioral impairment symptoms in Parkinson’s disease.”

Dr. Lilascharoen and Dr. Lang did not report outside funding or conflicts of interest.

SARS-CoV-2 seroprevalence studies of healthcare workers (HCWs) provide valuable insights into the excess risk of infection in this population and indirect evidence supporting the value of personal protective equipment (PPE) use. Seroprevalence estimates are composite measures of exposure risk and transmission mitigation both in the healthcare and community environments. The challenge of interpreting these studies arises from the diversity of HCW vocational roles and work settings in juxtaposition to heterogeneous community exposure risks. In this issue, two studies untangle some of these competing factors.

Investigators from Kashmir, India, assessed the relationship between seropositivity and specific HCW roles and work sites.¹ They found a lower seroprevalence among HCWs at hospitals dedicated to COVID patients, relative to non-COVID hospitals. This seemingly paradoxical finding likely results from a combination of vigilant PPE adherence enforced through a buddy system, restrictive visitation policies, HCW residential dormitories reducing community exposure, and a spillover effect of careful in-hospital exposure avoidance practices on out-of-hospital behavior. A similar spillover effect has been hypothesized for low HCW seroprevalence relative to the surrounding community in California.²

In complement, researchers at a large New York City (NYC) hospital found higher overall HCW seropositivity rates compared with the community, though estimates were strikingly variable after detailed stratification by job function and location.³ The gradient of seroprevalence showed the highest risk among nurses and those in nonclinical, low-wage jobs (eg, patient transport, housekeeping), a finding also seen in another US study prior to adjustment for demographic and community factors.⁴ This finding highlights the association between socioeconomic status, structural community exposure risk factors such as multiple essential workers living within multigenerational households, and the challenges of sickness absenteeism. High seroprevalence among nurses and emergency department HCWs (who expeditiously evaluate many undifferentiated patients) may reflect both greater aggregate duration of exposure to infected patients and increased frequency of PPE donning and doffing, resulting in fatigue and diminished vigilance.⁵

A NYC-based study similarly showed high HCW seroprevalence, although no consistent associations with job function (albeit measured with less granularity) or community-based exposures were identified.⁶ Several studies comparing HCW to local community seropositivity rates have reached disparate conclusions.^2,7 These contrasting data may result from variability in vigilance of PPE use, mask use in work rooms or during meals/breaktimes, sick leave policies driven by staffing demands, and neighborhood factors. In addition, selection biases and timing of blood sampling relative to viral transmission peaks (with differing degrees of temporal antibody waning) may contribute to the apparent discordance. In particular, comparative community-based samples vary greatly in their inclusion of asymptomatic patients, which can substantially affect such estimates by changing the denominator population.

We draw three conclusions: (1) Evidence for HCW exposure often tracks with community infection rates, suggesting that nonworkplace exposures are a dominant source of HCW seropositivity; (2) vigilant PPE use and assertively implemented protective measures unrelated to patient encounters can dramatically reduce infection risk, even among those with frequent exposures; and (3) HCW infection risk during future peaks can be effectively restrained with adequate resources and support, even in the presence of variants for which no effective vaccination or preventive pharmacotherapy exists. Given the divergent seroprevalence rates found in these studies after detailed stratification by job function and location, it is important for future studies to evaluate their relationship with infectious risk. Accurately quantifying the excess risks borne by HCWs may remain an elusive objective, but experiential knowledge offers numerous strategies worthy of proactive implementation to preserve HCW safety and well-being.

SARS-CoV-2 seroprevalence studies of healthcare workers (HCWs) provide valuable insights into the excess risk of infection in this population and indirect evidence supporting the value of personal protective equipment (PPE) use. Seroprevalence estimates are composite measures of exposure risk and transmission mitigation both in the healthcare and community environments. The challenge of interpreting these studies arises from the diversity of HCW vocational roles and work settings in juxtaposition to heterogeneous community exposure risks. In this issue, two studies untangle some of these competing factors.

Investigators from Kashmir, India, assessed the relationship between seropositivity and specific HCW roles and work sites.¹ They found a lower seroprevalence among HCWs at hospitals dedicated to COVID patients, relative to non-COVID hospitals. This seemingly paradoxical finding likely results from a combination of vigilant PPE adherence enforced through a buddy system, restrictive visitation policies, HCW residential dormitories reducing community exposure, and a spillover effect of careful in-hospital exposure avoidance practices on out-of-hospital behavior. A similar spillover effect has been hypothesized for low HCW seroprevalence relative to the surrounding community in California.²

In complement, researchers at a large New York City (NYC) hospital found higher overall HCW seropositivity rates compared with the community, though estimates were strikingly variable after detailed stratification by job function and location.³ The gradient of seroprevalence showed the highest risk among nurses and those in nonclinical, low-wage jobs (eg, patient transport, housekeeping), a finding also seen in another US study prior to adjustment for demographic and community factors.⁴ This finding highlights the association between socioeconomic status, structural community exposure risk factors such as multiple essential workers living within multigenerational households, and the challenges of sickness absenteeism. High seroprevalence among nurses and emergency department HCWs (who expeditiously evaluate many undifferentiated patients) may reflect both greater aggregate duration of exposure to infected patients and increased frequency of PPE donning and doffing, resulting in fatigue and diminished vigilance.⁵

A NYC-based study similarly showed high HCW seroprevalence, although no consistent associations with job function (albeit measured with less granularity) or community-based exposures were identified.⁶ Several studies comparing HCW to local community seropositivity rates have reached disparate conclusions.^2,7 These contrasting data may result from variability in vigilance of PPE use, mask use in work rooms or during meals/breaktimes, sick leave policies driven by staffing demands, and neighborhood factors. In addition, selection biases and timing of blood sampling relative to viral transmission peaks (with differing degrees of temporal antibody waning) may contribute to the apparent discordance. In particular, comparative community-based samples vary greatly in their inclusion of asymptomatic patients, which can substantially affect such estimates by changing the denominator population.

We draw three conclusions: (1) Evidence for HCW exposure often tracks with community infection rates, suggesting that nonworkplace exposures are a dominant source of HCW seropositivity; (2) vigilant PPE use and assertively implemented protective measures unrelated to patient encounters can dramatically reduce infection risk, even among those with frequent exposures; and (3) HCW infection risk during future peaks can be effectively restrained with adequate resources and support, even in the presence of variants for which no effective vaccination or preventive pharmacotherapy exists. Given the divergent seroprevalence rates found in these studies after detailed stratification by job function and location, it is important for future studies to evaluate their relationship with infectious risk. Accurately quantifying the excess risks borne by HCWs may remain an elusive objective, but experiential knowledge offers numerous strategies worthy of proactive implementation to preserve HCW safety and well-being.

SARS-CoV-2 seroprevalence studies of healthcare workers (HCWs) provide valuable insights into the excess risk of infection in this population and indirect evidence supporting the value of personal protective equipment (PPE) use. Seroprevalence estimates are composite measures of exposure risk and transmission mitigation both in the healthcare and community environments. The challenge of interpreting these studies arises from the diversity of HCW vocational roles and work settings in juxtaposition to heterogeneous community exposure risks. In this issue, two studies untangle some of these competing factors.

Investigators from Kashmir, India, assessed the relationship between seropositivity and specific HCW roles and work sites.¹ They found a lower seroprevalence among HCWs at hospitals dedicated to COVID patients, relative to non-COVID hospitals. This seemingly paradoxical finding likely results from a combination of vigilant PPE adherence enforced through a buddy system, restrictive visitation policies, HCW residential dormitories reducing community exposure, and a spillover effect of careful in-hospital exposure avoidance practices on out-of-hospital behavior. A similar spillover effect has been hypothesized for low HCW seroprevalence relative to the surrounding community in California.²

In complement, researchers at a large New York City (NYC) hospital found higher overall HCW seropositivity rates compared with the community, though estimates were strikingly variable after detailed stratification by job function and location.³ The gradient of seroprevalence showed the highest risk among nurses and those in nonclinical, low-wage jobs (eg, patient transport, housekeeping), a finding also seen in another US study prior to adjustment for demographic and community factors.⁴ This finding highlights the association between socioeconomic status, structural community exposure risk factors such as multiple essential workers living within multigenerational households, and the challenges of sickness absenteeism. High seroprevalence among nurses and emergency department HCWs (who expeditiously evaluate many undifferentiated patients) may reflect both greater aggregate duration of exposure to infected patients and increased frequency of PPE donning and doffing, resulting in fatigue and diminished vigilance.⁵

A NYC-based study similarly showed high HCW seroprevalence, although no consistent associations with job function (albeit measured with less granularity) or community-based exposures were identified.⁶ Several studies comparing HCW to local community seropositivity rates have reached disparate conclusions.^2,7 These contrasting data may result from variability in vigilance of PPE use, mask use in work rooms or during meals/breaktimes, sick leave policies driven by staffing demands, and neighborhood factors. In addition, selection biases and timing of blood sampling relative to viral transmission peaks (with differing degrees of temporal antibody waning) may contribute to the apparent discordance. In particular, comparative community-based samples vary greatly in their inclusion of asymptomatic patients, which can substantially affect such estimates by changing the denominator population.

We draw three conclusions: (1) Evidence for HCW exposure often tracks with community infection rates, suggesting that nonworkplace exposures are a dominant source of HCW seropositivity; (2) vigilant PPE use and assertively implemented protective measures unrelated to patient encounters can dramatically reduce infection risk, even among those with frequent exposures; and (3) HCW infection risk during future peaks can be effectively restrained with adequate resources and support, even in the presence of variants for which no effective vaccination or preventive pharmacotherapy exists. Given the divergent seroprevalence rates found in these studies after detailed stratification by job function and location, it is important for future studies to evaluate their relationship with infectious risk. Accurately quantifying the excess risks borne by HCWs may remain an elusive objective, but experiential knowledge offers numerous strategies worthy of proactive implementation to preserve HCW safety and well-being.

Bronchiolitis, the most common cause of hospital admission for infants, is responsible for more than $500 million in direct medical costs in the United States yearly. Recent efforts have focused on what can be safely avoided when caring for patients with bronchiolitis (eg, continuous pulse oximetry, bronchodilator administration). While there remains substantial room for improvement in avoiding such low-value (or no-value) practices, the incremental improvements from these de-escalations will reach an asymptote over time. Further improvements in care and value must occur by doing things differently—not just simply doing less.

In this month’s Journal of Hospital Medicine, Ohlsen et al¹ describe an intervention to decrease length of stay (LOS) for patients with bronchiolitis They employed an interrupted time series analysis to evaluate implementation of an observation unit and home oxygen therapy (OU-HOT) model of care and found that LOS dramatically decreased immediately following implementation. This reduction was maintained over 9 years. Use of home oxygen decreased over the study period, while LOS remained low, suggesting that the most important intervention was a structural one—the admission of patients to a unit dedicated to efficient discharge.

Observation units, staffed 24/7 with attending physicians, are well adapted to care for patients with illnesses like bronchiolitis, where hospitalization, though often needed, may be brief.² These units are designed more like an emergency department than an inpatient unit, with protocolized care and the expectation of rapid turnover.

Multiple studies have shown that physician-related delays are a primary driver of delayed discharge from inpatient units. Such delays include delayed or variable clinical decision-making, inadequate communication of discharge criteria, and waiting to staff patients with an attending physician.^3-5 Addressing these issues could allow inpatient units to function more like observation units for specific diagnoses. Standardization of care around specific diagnoses can make decision-making and discharge more efficient. In 2014, White et al⁴ showed that standardizing discharge criteria for specific diagnoses (including bronchiolitis) and embedding these criteria in admission order sets resulted in a significant decrease in LOS without affecting readmission rates or patient satisfaction.

To address the issues of attending availability, we may need to rethink rounding. The daily structure of inpatient rounding has not meaningfully changed since the 1950s. While there has been a push for increased morning discharges, this approach misses many patients whose illness course is evolving and who may be ready for discharge in the afternoon or evening.⁶ The current structure of morning rounds on medical teams is based on the need for resident education, supervision, and time available for attendings to complete administrative tasks and teaching in the afternoons. Structural change in patient care requires academic institutions to rethink what “being on service” actually means. Since LOS in these cases is brief, multiple days of clinical continuity may not be as beneficial as with other diagnoses. Further, there is no reason that daytime rounding teams are the only teams that can discharge patients. Telemedicine could also offer an opportunity for attending physicians to remotely determine whether a patient is discharge appropriate. Standardization of discharge criteria at admission could allow for trainees to discharge patients when they meet those criteria.

Perhaps we should begin to adapt our work structure to our patients’ needs, rather than the other way around. In pediatrics, we have already made traditional rounding more patient-focused through the practice of family-centered rounding. We should identify, as the authors have, ways to do things differently to make further improvements in care.

Ultimately, the success of this OU-HOT protocol demonstrates the power of structural interventions aimed at changing how we do things rather than just doing more (or less) of the same.

Bronchiolitis, the most common cause of hospital admission for infants, is responsible for more than $500 million in direct medical costs in the United States yearly. Recent efforts have focused on what can be safely avoided when caring for patients with bronchiolitis (eg, continuous pulse oximetry, bronchodilator administration). While there remains substantial room for improvement in avoiding such low-value (or no-value) practices, the incremental improvements from these de-escalations will reach an asymptote over time. Further improvements in care and value must occur by doing things differently—not just simply doing less.

In this month’s Journal of Hospital Medicine, Ohlsen et al¹ describe an intervention to decrease length of stay (LOS) for patients with bronchiolitis They employed an interrupted time series analysis to evaluate implementation of an observation unit and home oxygen therapy (OU-HOT) model of care and found that LOS dramatically decreased immediately following implementation. This reduction was maintained over 9 years. Use of home oxygen decreased over the study period, while LOS remained low, suggesting that the most important intervention was a structural one—the admission of patients to a unit dedicated to efficient discharge.

Observation units, staffed 24/7 with attending physicians, are well adapted to care for patients with illnesses like bronchiolitis, where hospitalization, though often needed, may be brief.² These units are designed more like an emergency department than an inpatient unit, with protocolized care and the expectation of rapid turnover.

Multiple studies have shown that physician-related delays are a primary driver of delayed discharge from inpatient units. Such delays include delayed or variable clinical decision-making, inadequate communication of discharge criteria, and waiting to staff patients with an attending physician.^3-5 Addressing these issues could allow inpatient units to function more like observation units for specific diagnoses. Standardization of care around specific diagnoses can make decision-making and discharge more efficient. In 2014, White et al⁴ showed that standardizing discharge criteria for specific diagnoses (including bronchiolitis) and embedding these criteria in admission order sets resulted in a significant decrease in LOS without affecting readmission rates or patient satisfaction.

To address the issues of attending availability, we may need to rethink rounding. The daily structure of inpatient rounding has not meaningfully changed since the 1950s. While there has been a push for increased morning discharges, this approach misses many patients whose illness course is evolving and who may be ready for discharge in the afternoon or evening.⁶ The current structure of morning rounds on medical teams is based on the need for resident education, supervision, and time available for attendings to complete administrative tasks and teaching in the afternoons. Structural change in patient care requires academic institutions to rethink what “being on service” actually means. Since LOS in these cases is brief, multiple days of clinical continuity may not be as beneficial as with other diagnoses. Further, there is no reason that daytime rounding teams are the only teams that can discharge patients. Telemedicine could also offer an opportunity for attending physicians to remotely determine whether a patient is discharge appropriate. Standardization of discharge criteria at admission could allow for trainees to discharge patients when they meet those criteria.

Perhaps we should begin to adapt our work structure to our patients’ needs, rather than the other way around. In pediatrics, we have already made traditional rounding more patient-focused through the practice of family-centered rounding. We should identify, as the authors have, ways to do things differently to make further improvements in care.

Ultimately, the success of this OU-HOT protocol demonstrates the power of structural interventions aimed at changing how we do things rather than just doing more (or less) of the same.

Bronchiolitis, the most common cause of hospital admission for infants, is responsible for more than $500 million in direct medical costs in the United States yearly. Recent efforts have focused on what can be safely avoided when caring for patients with bronchiolitis (eg, continuous pulse oximetry, bronchodilator administration). While there remains substantial room for improvement in avoiding such low-value (or no-value) practices, the incremental improvements from these de-escalations will reach an asymptote over time. Further improvements in care and value must occur by doing things differently—not just simply doing less.

In this month’s Journal of Hospital Medicine, Ohlsen et al¹ describe an intervention to decrease length of stay (LOS) for patients with bronchiolitis They employed an interrupted time series analysis to evaluate implementation of an observation unit and home oxygen therapy (OU-HOT) model of care and found that LOS dramatically decreased immediately following implementation. This reduction was maintained over 9 years. Use of home oxygen decreased over the study period, while LOS remained low, suggesting that the most important intervention was a structural one—the admission of patients to a unit dedicated to efficient discharge.

Observation units, staffed 24/7 with attending physicians, are well adapted to care for patients with illnesses like bronchiolitis, where hospitalization, though often needed, may be brief.² These units are designed more like an emergency department than an inpatient unit, with protocolized care and the expectation of rapid turnover.

Multiple studies have shown that physician-related delays are a primary driver of delayed discharge from inpatient units. Such delays include delayed or variable clinical decision-making, inadequate communication of discharge criteria, and waiting to staff patients with an attending physician.^3-5 Addressing these issues could allow inpatient units to function more like observation units for specific diagnoses. Standardization of care around specific diagnoses can make decision-making and discharge more efficient. In 2014, White et al⁴ showed that standardizing discharge criteria for specific diagnoses (including bronchiolitis) and embedding these criteria in admission order sets resulted in a significant decrease in LOS without affecting readmission rates or patient satisfaction.

To address the issues of attending availability, we may need to rethink rounding. The daily structure of inpatient rounding has not meaningfully changed since the 1950s. While there has been a push for increased morning discharges, this approach misses many patients whose illness course is evolving and who may be ready for discharge in the afternoon or evening.⁶ The current structure of morning rounds on medical teams is based on the need for resident education, supervision, and time available for attendings to complete administrative tasks and teaching in the afternoons. Structural change in patient care requires academic institutions to rethink what “being on service” actually means. Since LOS in these cases is brief, multiple days of clinical continuity may not be as beneficial as with other diagnoses. Further, there is no reason that daytime rounding teams are the only teams that can discharge patients. Telemedicine could also offer an opportunity for attending physicians to remotely determine whether a patient is discharge appropriate. Standardization of discharge criteria at admission could allow for trainees to discharge patients when they meet those criteria.

Perhaps we should begin to adapt our work structure to our patients’ needs, rather than the other way around. In pediatrics, we have already made traditional rounding more patient-focused through the practice of family-centered rounding. We should identify, as the authors have, ways to do things differently to make further improvements in care.

Ultimately, the success of this OU-HOT protocol demonstrates the power of structural interventions aimed at changing how we do things rather than just doing more (or less) of the same.

Second-line treatment with sintilimab improved survival, when compared with docetaxel, in patients with advanced/metastatic squamous non–small cell lung cancer (sqNSCLC) in a phase 3 trial.

Sintilimab improved both overall survival (OS) and progression-free survival (PFS), according to Yuankai Shi, MD, of the Chinese Academy of Medical Sciences & Peking Union Medical College in Beijing.

Dr. Shi presented these findings, from the ORIENT-3 study, at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract CT041).

ORIENT-3 enrolled and randomized 290 patients with stage IIIB/IIIC or IV sqNSCLC and disease progression during or after first-line platimum-based chemotherapy. They were randomized 1:1 to receive sintilimab at 200 mg or docetaxel at 75 mg/m²intravenously every 3 weeks until disease progression or intolerable toxicity.

The median age was 60 years in the sintilimab arm and 61 years in the docetaxel arm. A majority of patients were men (94% in the sintilimab arm and 90% in the docetaxel arm), most were current or former smokers (90% and 80%, respectively), and more than three-quarters had an ECOG performance status of 1 (76% and 77%, respectively). More than half of patients had a PD-L1 tumor proportion score (TPS) of 1% or greater (57% and 47%, respectively), and 81% of patients in both arms had stage IV disease.

Results: Survival and safety

Patients in the sintilimab arm received a median of 8.0 cycles of therapy (range, 1-45), and those in the docetaxel arm received a median of 2.0 cycles of therapy (range, 1-15).

At a median follow-up of 23.56 months, the median OS was significantly longer in the sintilimab arm than in the docetaxel arm – 11.79 months and 8.25 months, respectively (hazard ratio, 0.74; P = .02489). OS benefits were generally consistent across subgroups.

The secondary endpoints of PFS and objective response rate also favored sintilimab, Dr. Shi reported.

The median PFS was 4.30 months in the sintilimab arm and 2.79 months in the docetaxel arm (HR, 0.52; P < .00001). Confirmed objective response rates were 25.5% and 2.2%, respectively; the median duration of response was 12.45 months and 4.14 months, respectively; and disease control rates were 65.5% and 37.8%, respectively.

“Sintilimab had a favorable safety profile over docetaxel, with a lower frequency of grade 3 or higher treatment-related adverse events, with no new safety signals observed,” Dr. Shi said.

Treatment-related adverse events (TRAEs) occurred in 84.7% of patients receiving sintilimab and 83.1% of those receiving docetaxel. Hypothyroidism was the most common TRAE in the sintilimab arm (18.1%), and alopecia was the most common TRAE in the docetaxel arm (34.6%).

Grade 3 or higher TRAEs were less frequent in the sintilimab arm than in the docetaxel arm (18.1% vs. 36.2%). Rates of discontinuation because of TRAEs were 12.5% and 5.4% in the sintilimab and docetaxel arms, respectively. TRAEs leading to death occurred in five patients in the sintilimab arm and one in the docetaxel arm.

Use in the real world

Noting sintilimab’s significant OS and PFS benefits as well as superior response rate and duration of response, Dr. Shi concluded, “Sintilimab might provide an alternative second-line treatment option for advanced and metastatic sqNSCLC.”

AACR moderator Marina Garassino, MD, of the University of Chicago, commented on the potential utility of sintilimab and tislelizumab, another checkpoint inhibitor that was evaluated in NSCLC in the RATIONALE 303 trial (AACR 2021, Abstract CT039). Dr. Garassino observed that both drugs have demonstrated superiority to docetaxel as second-line therapy in NSCLC.

Although there have been no head-to-head trials, sintilimab and tislelizumab appear to be very similar to the already approved immune checkpoint inhibitors, which are currently being used as first-line treatment.

“That similarity would make them inappropriate for second-line treatment, except in countries where immune checkpoint inhibitors are not yet approved for first-line therapy,” Dr. Garassino noted.

When asked to comment on the higher treatment-related death rate observed with sintilimab, Dr. Garassino said, “We need to remember that these drugs were developed in China with a population that may have a side effect profile differing from that of a Western population. Also, we are very familiar with this class of drugs and know how to treat their side effects. Similar drugs but different populations and different trials, so it’s very hard to judge.”

Dr. Garassino speculated that with the “super expensive” price tags on the new checkpoint inhibitors, having additional agents that could provide choice and drive prices down would be welcome.

ORIENT-3 was funded by Innovent Biologics and Eli Lilly. Dr. Shi disclosed consultancy for Innovent Biologics. Dr. Garassino disclosed relationships with Eli Lilly, AstraZeneca, Novartis, and several other companies, not including Innovent Biologics.

Second-line treatment with sintilimab improved survival, when compared with docetaxel, in patients with advanced/metastatic squamous non–small cell lung cancer (sqNSCLC) in a phase 3 trial.

Sintilimab improved both overall survival (OS) and progression-free survival (PFS), according to Yuankai Shi, MD, of the Chinese Academy of Medical Sciences & Peking Union Medical College in Beijing.

Dr. Shi presented these findings, from the ORIENT-3 study, at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract CT041).

ORIENT-3 enrolled and randomized 290 patients with stage IIIB/IIIC or IV sqNSCLC and disease progression during or after first-line platimum-based chemotherapy. They were randomized 1:1 to receive sintilimab at 200 mg or docetaxel at 75 mg/m²intravenously every 3 weeks until disease progression or intolerable toxicity.

The median age was 60 years in the sintilimab arm and 61 years in the docetaxel arm. A majority of patients were men (94% in the sintilimab arm and 90% in the docetaxel arm), most were current or former smokers (90% and 80%, respectively), and more than three-quarters had an ECOG performance status of 1 (76% and 77%, respectively). More than half of patients had a PD-L1 tumor proportion score (TPS) of 1% or greater (57% and 47%, respectively), and 81% of patients in both arms had stage IV disease.

Results: Survival and safety

Patients in the sintilimab arm received a median of 8.0 cycles of therapy (range, 1-45), and those in the docetaxel arm received a median of 2.0 cycles of therapy (range, 1-15).

At a median follow-up of 23.56 months, the median OS was significantly longer in the sintilimab arm than in the docetaxel arm – 11.79 months and 8.25 months, respectively (hazard ratio, 0.74; P = .02489). OS benefits were generally consistent across subgroups.

The secondary endpoints of PFS and objective response rate also favored sintilimab, Dr. Shi reported.

The median PFS was 4.30 months in the sintilimab arm and 2.79 months in the docetaxel arm (HR, 0.52; P < .00001). Confirmed objective response rates were 25.5% and 2.2%, respectively; the median duration of response was 12.45 months and 4.14 months, respectively; and disease control rates were 65.5% and 37.8%, respectively.

“Sintilimab had a favorable safety profile over docetaxel, with a lower frequency of grade 3 or higher treatment-related adverse events, with no new safety signals observed,” Dr. Shi said.

Treatment-related adverse events (TRAEs) occurred in 84.7% of patients receiving sintilimab and 83.1% of those receiving docetaxel. Hypothyroidism was the most common TRAE in the sintilimab arm (18.1%), and alopecia was the most common TRAE in the docetaxel arm (34.6%).

Grade 3 or higher TRAEs were less frequent in the sintilimab arm than in the docetaxel arm (18.1% vs. 36.2%). Rates of discontinuation because of TRAEs were 12.5% and 5.4% in the sintilimab and docetaxel arms, respectively. TRAEs leading to death occurred in five patients in the sintilimab arm and one in the docetaxel arm.

Use in the real world

Noting sintilimab’s significant OS and PFS benefits as well as superior response rate and duration of response, Dr. Shi concluded, “Sintilimab might provide an alternative second-line treatment option for advanced and metastatic sqNSCLC.”

AACR moderator Marina Garassino, MD, of the University of Chicago, commented on the potential utility of sintilimab and tislelizumab, another checkpoint inhibitor that was evaluated in NSCLC in the RATIONALE 303 trial (AACR 2021, Abstract CT039). Dr. Garassino observed that both drugs have demonstrated superiority to docetaxel as second-line therapy in NSCLC.

Although there have been no head-to-head trials, sintilimab and tislelizumab appear to be very similar to the already approved immune checkpoint inhibitors, which are currently being used as first-line treatment.

“That similarity would make them inappropriate for second-line treatment, except in countries where immune checkpoint inhibitors are not yet approved for first-line therapy,” Dr. Garassino noted.

When asked to comment on the higher treatment-related death rate observed with sintilimab, Dr. Garassino said, “We need to remember that these drugs were developed in China with a population that may have a side effect profile differing from that of a Western population. Also, we are very familiar with this class of drugs and know how to treat their side effects. Similar drugs but different populations and different trials, so it’s very hard to judge.”

Dr. Garassino speculated that with the “super expensive” price tags on the new checkpoint inhibitors, having additional agents that could provide choice and drive prices down would be welcome.

ORIENT-3 was funded by Innovent Biologics and Eli Lilly. Dr. Shi disclosed consultancy for Innovent Biologics. Dr. Garassino disclosed relationships with Eli Lilly, AstraZeneca, Novartis, and several other companies, not including Innovent Biologics.

Second-line treatment with sintilimab improved survival, when compared with docetaxel, in patients with advanced/metastatic squamous non–small cell lung cancer (sqNSCLC) in a phase 3 trial.

Sintilimab improved both overall survival (OS) and progression-free survival (PFS), according to Yuankai Shi, MD, of the Chinese Academy of Medical Sciences & Peking Union Medical College in Beijing.

Dr. Shi presented these findings, from the ORIENT-3 study, at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract CT041).

ORIENT-3 enrolled and randomized 290 patients with stage IIIB/IIIC or IV sqNSCLC and disease progression during or after first-line platimum-based chemotherapy. They were randomized 1:1 to receive sintilimab at 200 mg or docetaxel at 75 mg/m²intravenously every 3 weeks until disease progression or intolerable toxicity.

The median age was 60 years in the sintilimab arm and 61 years in the docetaxel arm. A majority of patients were men (94% in the sintilimab arm and 90% in the docetaxel arm), most were current or former smokers (90% and 80%, respectively), and more than three-quarters had an ECOG performance status of 1 (76% and 77%, respectively). More than half of patients had a PD-L1 tumor proportion score (TPS) of 1% or greater (57% and 47%, respectively), and 81% of patients in both arms had stage IV disease.

Results: Survival and safety

Patients in the sintilimab arm received a median of 8.0 cycles of therapy (range, 1-45), and those in the docetaxel arm received a median of 2.0 cycles of therapy (range, 1-15).

At a median follow-up of 23.56 months, the median OS was significantly longer in the sintilimab arm than in the docetaxel arm – 11.79 months and 8.25 months, respectively (hazard ratio, 0.74; P = .02489). OS benefits were generally consistent across subgroups.

The secondary endpoints of PFS and objective response rate also favored sintilimab, Dr. Shi reported.

The median PFS was 4.30 months in the sintilimab arm and 2.79 months in the docetaxel arm (HR, 0.52; P < .00001). Confirmed objective response rates were 25.5% and 2.2%, respectively; the median duration of response was 12.45 months and 4.14 months, respectively; and disease control rates were 65.5% and 37.8%, respectively.

“Sintilimab had a favorable safety profile over docetaxel, with a lower frequency of grade 3 or higher treatment-related adverse events, with no new safety signals observed,” Dr. Shi said.

Treatment-related adverse events (TRAEs) occurred in 84.7% of patients receiving sintilimab and 83.1% of those receiving docetaxel. Hypothyroidism was the most common TRAE in the sintilimab arm (18.1%), and alopecia was the most common TRAE in the docetaxel arm (34.6%).

Grade 3 or higher TRAEs were less frequent in the sintilimab arm than in the docetaxel arm (18.1% vs. 36.2%). Rates of discontinuation because of TRAEs were 12.5% and 5.4% in the sintilimab and docetaxel arms, respectively. TRAEs leading to death occurred in five patients in the sintilimab arm and one in the docetaxel arm.

Use in the real world

Noting sintilimab’s significant OS and PFS benefits as well as superior response rate and duration of response, Dr. Shi concluded, “Sintilimab might provide an alternative second-line treatment option for advanced and metastatic sqNSCLC.”

AACR moderator Marina Garassino, MD, of the University of Chicago, commented on the potential utility of sintilimab and tislelizumab, another checkpoint inhibitor that was evaluated in NSCLC in the RATIONALE 303 trial (AACR 2021, Abstract CT039). Dr. Garassino observed that both drugs have demonstrated superiority to docetaxel as second-line therapy in NSCLC.

Although there have been no head-to-head trials, sintilimab and tislelizumab appear to be very similar to the already approved immune checkpoint inhibitors, which are currently being used as first-line treatment.

“That similarity would make them inappropriate for second-line treatment, except in countries where immune checkpoint inhibitors are not yet approved for first-line therapy,” Dr. Garassino noted.

When asked to comment on the higher treatment-related death rate observed with sintilimab, Dr. Garassino said, “We need to remember that these drugs were developed in China with a population that may have a side effect profile differing from that of a Western population. Also, we are very familiar with this class of drugs and know how to treat their side effects. Similar drugs but different populations and different trials, so it’s very hard to judge.”

Dr. Garassino speculated that with the “super expensive” price tags on the new checkpoint inhibitors, having additional agents that could provide choice and drive prices down would be welcome.

ORIENT-3 was funded by Innovent Biologics and Eli Lilly. Dr. Shi disclosed consultancy for Innovent Biologics. Dr. Garassino disclosed relationships with Eli Lilly, AstraZeneca, Novartis, and several other companies, not including Innovent Biologics.

Plasma levels of neurofilament light (NfL) are a better predictor of cognitive decline and changes in neuroimaging in comparison with total tau (T-tau), new research suggests. In certain contexts, T-tau improves cross-sectional analyses of these outcomes, but adding T-tau measurements to NfL measurements does not improve the predictive power of NfL, results of a longitudinal analysis show.

“The major distinction, for cognition at least, was that NfL cross-sectionally was associated with most cognitive outcomes, and longitudinally, higher NfL at baseline was associated with cognitive decline in every domain,” said study investigator Jordan Marks, an MD/PhD student at the Mayo Medical School, Rochester, Minn.

The findings were presented at the American Academy of Neurology’s 2021 annual meeting.
 

New tool for dementia diagnosis?

In recent years, researchers have studied NfL and T-tau as potential blood-based biomarkers of neurodegeneration. In cross-sectional and longitudinal studies, NfL and T-tau have been associated with worse cognition and with neuroimaging measures of cortical thickness, cortical atrophy, white-matter hyperintensity, and white-matter integrity. However, no previous research has directly compared the prognostic ability of these two biomarkers.

The study included 995 participants without dementia in the Mayo Clinic Study on Aging. All participants underwent measurement of NfL and T-tau and assessment of cognitive status, as well as neuroimaging. The investigators measured NfL and T-tau on the Simoa HD-1 platform. They reexamined patients approximately every 15 months. The median follow-up time was 6.2 years.

To examine associations between baseline plasma NfL or T-tau and cognitive or neuroimaging outcomes, the researchers conducted data analyses using linear mixed effects models and adjusted the data for age, sex, and education. They replicated these analyses using data from the Alzheimer’s Disease Neuroimaging Initiative (ADNI). For these analyses, they selected 387 participants without dementia who had been followed for a median of 3.0 years.

In all analyses, baseline plasma NfL was more strongly associated with cognitive and neuroimaging outcomes than T-tau. “Baseline plasma NfL was associated with cognitive decline in all domains measured, while T-tau was not associated with cognitive decline,” said Mr. Marks.

Plasma NfL was more strongly associated with decreases in cortical thickness over time than T-tau was. NfL was also more strongly associated with declining hippocampal volume and white-matter changes.

However, in cross-sectional analysis, the combination of elevated NfL levels and elevated T-tau levels at baseline was more strongly associated with decreased global cognition and memory, compared with elevated NfL levels alone. The combination also was more strongly associated with neuroimaging measures, such as temporal cortex thickness and increased number of infarcts. However, in longitudinal analyses, T-tau did not add to the predictive value of NfL.

The analyses using ADNI data yielded similar results. Overall, the results suggest that NfL is a better prognostic marker of neurodegeneration in general, said Mr. Marks.

These findings, he said, may have implications for screening and diagnosis. “I’m definitely hopeful that NfL will be useful in a clinical setting to screen for those at risk of dementia and will be helpful, along with other modalities, like cognitive testing, for dementia diagnosis,” said Mr. Marks.

Future research should examine how changes in these biomarkers are associated with cognitive and neuroimaging outcomes over time.

“We used plasma levels at one point in time in this study, but we need a better sense of how to interpret, for example, what a rise in plasma NfL over a certain time period means for someone’s risk of developing neurodegenerative disease,” Mr. Marks added.
 

An ‘exciting’ prospect

Commenting on the study, Glen R. Finney, MD, director of the Memory and Cognition Program for Geisinger Health in Wilkes-Barre, Pa., said the findings add to neurologists’ ability to screen for brain diseases. “Evidence of neurodegeneration is part of the modern diagnosis of several disorders. While brain imaging can also provide that and may be needed for other reasons, this could provide an easy, potentially inexpensive way to screen for damage to the brain, giving us an added tool,” said Dr. Finney.

The prospect of using blood plasma markers to explore disease of the brain is exciting, Dr. Finney added. “I would like to see ongoing refinement of this approach and would like to see if there’s other markers in blood that could be used to find what specifically may be causing the damage,” he said.

The study was funded by the National Institutes of Health, the National Institute on Aging, and the GHR Foundation. Mr. Marks and Dr. Finney have disclosed no relevant financial relationships.

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

Plasma levels of neurofilament light (NfL) are a better predictor of cognitive decline and changes in neuroimaging in comparison with total tau (T-tau), new research suggests. In certain contexts, T-tau improves cross-sectional analyses of these outcomes, but adding T-tau measurements to NfL measurements does not improve the predictive power of NfL, results of a longitudinal analysis show.

“The major distinction, for cognition at least, was that NfL cross-sectionally was associated with most cognitive outcomes, and longitudinally, higher NfL at baseline was associated with cognitive decline in every domain,” said study investigator Jordan Marks, an MD/PhD student at the Mayo Medical School, Rochester, Minn.

The findings were presented at the American Academy of Neurology’s 2021 annual meeting.
 

New tool for dementia diagnosis?

In recent years, researchers have studied NfL and T-tau as potential blood-based biomarkers of neurodegeneration. In cross-sectional and longitudinal studies, NfL and T-tau have been associated with worse cognition and with neuroimaging measures of cortical thickness, cortical atrophy, white-matter hyperintensity, and white-matter integrity. However, no previous research has directly compared the prognostic ability of these two biomarkers.

The study included 995 participants without dementia in the Mayo Clinic Study on Aging. All participants underwent measurement of NfL and T-tau and assessment of cognitive status, as well as neuroimaging. The investigators measured NfL and T-tau on the Simoa HD-1 platform. They reexamined patients approximately every 15 months. The median follow-up time was 6.2 years.

To examine associations between baseline plasma NfL or T-tau and cognitive or neuroimaging outcomes, the researchers conducted data analyses using linear mixed effects models and adjusted the data for age, sex, and education. They replicated these analyses using data from the Alzheimer’s Disease Neuroimaging Initiative (ADNI). For these analyses, they selected 387 participants without dementia who had been followed for a median of 3.0 years.

In all analyses, baseline plasma NfL was more strongly associated with cognitive and neuroimaging outcomes than T-tau. “Baseline plasma NfL was associated with cognitive decline in all domains measured, while T-tau was not associated with cognitive decline,” said Mr. Marks.

Plasma NfL was more strongly associated with decreases in cortical thickness over time than T-tau was. NfL was also more strongly associated with declining hippocampal volume and white-matter changes.

However, in cross-sectional analysis, the combination of elevated NfL levels and elevated T-tau levels at baseline was more strongly associated with decreased global cognition and memory, compared with elevated NfL levels alone. The combination also was more strongly associated with neuroimaging measures, such as temporal cortex thickness and increased number of infarcts. However, in longitudinal analyses, T-tau did not add to the predictive value of NfL.

The analyses using ADNI data yielded similar results. Overall, the results suggest that NfL is a better prognostic marker of neurodegeneration in general, said Mr. Marks.

These findings, he said, may have implications for screening and diagnosis. “I’m definitely hopeful that NfL will be useful in a clinical setting to screen for those at risk of dementia and will be helpful, along with other modalities, like cognitive testing, for dementia diagnosis,” said Mr. Marks.

Future research should examine how changes in these biomarkers are associated with cognitive and neuroimaging outcomes over time.

“We used plasma levels at one point in time in this study, but we need a better sense of how to interpret, for example, what a rise in plasma NfL over a certain time period means for someone’s risk of developing neurodegenerative disease,” Mr. Marks added.
 

An ‘exciting’ prospect

Commenting on the study, Glen R. Finney, MD, director of the Memory and Cognition Program for Geisinger Health in Wilkes-Barre, Pa., said the findings add to neurologists’ ability to screen for brain diseases. “Evidence of neurodegeneration is part of the modern diagnosis of several disorders. While brain imaging can also provide that and may be needed for other reasons, this could provide an easy, potentially inexpensive way to screen for damage to the brain, giving us an added tool,” said Dr. Finney.

The prospect of using blood plasma markers to explore disease of the brain is exciting, Dr. Finney added. “I would like to see ongoing refinement of this approach and would like to see if there’s other markers in blood that could be used to find what specifically may be causing the damage,” he said.

The study was funded by the National Institutes of Health, the National Institute on Aging, and the GHR Foundation. Mr. Marks and Dr. Finney have disclosed no relevant financial relationships.

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

Plasma levels of neurofilament light (NfL) are a better predictor of cognitive decline and changes in neuroimaging in comparison with total tau (T-tau), new research suggests. In certain contexts, T-tau improves cross-sectional analyses of these outcomes, but adding T-tau measurements to NfL measurements does not improve the predictive power of NfL, results of a longitudinal analysis show.

“The major distinction, for cognition at least, was that NfL cross-sectionally was associated with most cognitive outcomes, and longitudinally, higher NfL at baseline was associated with cognitive decline in every domain,” said study investigator Jordan Marks, an MD/PhD student at the Mayo Medical School, Rochester, Minn.

The findings were presented at the American Academy of Neurology’s 2021 annual meeting.
 

New tool for dementia diagnosis?

In recent years, researchers have studied NfL and T-tau as potential blood-based biomarkers of neurodegeneration. In cross-sectional and longitudinal studies, NfL and T-tau have been associated with worse cognition and with neuroimaging measures of cortical thickness, cortical atrophy, white-matter hyperintensity, and white-matter integrity. However, no previous research has directly compared the prognostic ability of these two biomarkers.

The study included 995 participants without dementia in the Mayo Clinic Study on Aging. All participants underwent measurement of NfL and T-tau and assessment of cognitive status, as well as neuroimaging. The investigators measured NfL and T-tau on the Simoa HD-1 platform. They reexamined patients approximately every 15 months. The median follow-up time was 6.2 years.

To examine associations between baseline plasma NfL or T-tau and cognitive or neuroimaging outcomes, the researchers conducted data analyses using linear mixed effects models and adjusted the data for age, sex, and education. They replicated these analyses using data from the Alzheimer’s Disease Neuroimaging Initiative (ADNI). For these analyses, they selected 387 participants without dementia who had been followed for a median of 3.0 years.

In all analyses, baseline plasma NfL was more strongly associated with cognitive and neuroimaging outcomes than T-tau. “Baseline plasma NfL was associated with cognitive decline in all domains measured, while T-tau was not associated with cognitive decline,” said Mr. Marks.

Plasma NfL was more strongly associated with decreases in cortical thickness over time than T-tau was. NfL was also more strongly associated with declining hippocampal volume and white-matter changes.

However, in cross-sectional analysis, the combination of elevated NfL levels and elevated T-tau levels at baseline was more strongly associated with decreased global cognition and memory, compared with elevated NfL levels alone. The combination also was more strongly associated with neuroimaging measures, such as temporal cortex thickness and increased number of infarcts. However, in longitudinal analyses, T-tau did not add to the predictive value of NfL.

The analyses using ADNI data yielded similar results. Overall, the results suggest that NfL is a better prognostic marker of neurodegeneration in general, said Mr. Marks.

These findings, he said, may have implications for screening and diagnosis. “I’m definitely hopeful that NfL will be useful in a clinical setting to screen for those at risk of dementia and will be helpful, along with other modalities, like cognitive testing, for dementia diagnosis,” said Mr. Marks.

Future research should examine how changes in these biomarkers are associated with cognitive and neuroimaging outcomes over time.

“We used plasma levels at one point in time in this study, but we need a better sense of how to interpret, for example, what a rise in plasma NfL over a certain time period means for someone’s risk of developing neurodegenerative disease,” Mr. Marks added.
 

An ‘exciting’ prospect

Commenting on the study, Glen R. Finney, MD, director of the Memory and Cognition Program for Geisinger Health in Wilkes-Barre, Pa., said the findings add to neurologists’ ability to screen for brain diseases. “Evidence of neurodegeneration is part of the modern diagnosis of several disorders. While brain imaging can also provide that and may be needed for other reasons, this could provide an easy, potentially inexpensive way to screen for damage to the brain, giving us an added tool,” said Dr. Finney.

The prospect of using blood plasma markers to explore disease of the brain is exciting, Dr. Finney added. “I would like to see ongoing refinement of this approach and would like to see if there’s other markers in blood that could be used to find what specifically may be causing the damage,” he said.

The study was funded by the National Institutes of Health, the National Institute on Aging, and the GHR Foundation. Mr. Marks and Dr. Finney have disclosed no relevant financial relationships.

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

The Food and Drug Administration said that within a year it will ban menthol in cigarettes and ban all flavors including menthol in cigars.

Wikimedia Commons/FitzColinGerald/ Creative Commons License

Menthol makes it easier to start smoking, and also enhances the effects of nicotine, making it more addictive and harder to quit, the FDA said in announcing its actions on Thursday.

Nineteen organizations – including the American Academy of Pediatrics, American Cancer Society, American College of Chest Physicians, American Medical Association, American Heart Association, and the National Medical Association – have pushed the FDA to ban menthol for years. The agency banned all flavors in cigarettes in 2009 but did not take any action against menthol. In 2013, the groups filed a petition demanding that the FDA ban menthol, too. The agency responded months later with a notice that it would start the process.

But it never took any action. Action on Smoking and Health and the African American Tobacco Control Leadership Council, later joined by the AMA and the NMA, sued in 2020 to compel the agency to do something. Now it has finally agreed to act.

The African American Tobacco Control Leadership Council welcomed the move but said the fight is not over and encouraged tobacco control activists to fight to ban menthol tobacco products at the local, state and federal level. “We know that this rule-making process could take years and we know that the tobacco industry will continue to do everything in their power to derail any attempt to remove their deadly products from the market,” Phillip Gardiner, MD, council cochair, said in a statement.

The AMA is urging the FDA to quickly implement the ban and remove the products “without further delay,” AMA President Susan R. Bailey, MD, said in a statement.

“FDA’s long-awaited decision to take action to eliminate menthol flavoring in cigarettes and all flavors in cigars ends a decades-long deference to the tobacco industry, which has repeatedly demonstrated its willingness to profit from products that result in death,” Lisa Lacasse, president of the American Cancer Society Cancer Action Network, said in her own statement.

Ms. Lacasse said banning menthol will help eliminate health disparities. She said 86% of Black people who smoke use menthol cigarettes, compared with 46% of Hispanic people who smoke, 39% of Asian people who smoke, and 29% of White people who smoke. “FDA’s actions today send a clear message that Big Tobacco’s strategy to profit off addicting Black communities will no longer be tolerated,” she said.

Not all groups are on board, however. The American Civil Liberties Union and several other organizations wrote to the country’s top health officials urging them to reconsider.

“Such a ban will trigger criminal penalties which will disproportionately impact people of color, as well as prioritize criminalization over public health and harm reduction,” the letter says. “A ban will also lead to unconstitutional policing and other negative interactions with local law enforcement.”

The letter calls the proposed ban “well intentioned,” but said any effort to reduce death and disease from tobacco “must avoid solutions that will create yet another reason for armed police to engage citizens on the street based on pretext or conduct that does not pose a threat to public safety.”

Instead of a ban, the organizations said, policy makers should consider increased education for adults and minors, stop-smoking programs, and increased funding for health centers in communities of color.

The Biden administration, however, pressed the point that banning menthol will bring many positives. Acting FDA Commissioner Janet Woodcock, MD said in a statement that banning menthol “will help significantly reduce youth initiation, increase the chances of smoking cessation among current smokers, and address health disparities experienced by communities of color, low-income populations, and LGBTQ-plus individuals, all of whom are far more likely to use these tobacco products.”

The FDA cited data showing that, in the first year or so after a ban goes into effect, an additional 923,000 smokers would quit, including 230,000 African Americans. Another study suggests that 633,000 deaths would be averted, including 237,000 Black Americans.

Dr. Woodcock added that, “armed with strong scientific evidence, and with full support from the [Biden] administration, we believe these actions will launch us on a trajectory toward ending tobacco-related disease and death in the U.S.”

The FDA estimates that 18.6 million Americans who are current smokers use menthol cigarettes, with a disproportionately high number being Black people. Menthol cigarette use among Black and Hispanic youth increased from 2011 to 2018, but declined for non-Hispanic White youth.

Flavored mass-produced cigars and cigarillos are disproportionately popular among youth, especially non-Hispanic Black high school students, who in 2020 reported past 30-day cigar smoking at levels twice as high as their White counterparts, said the FDA. Three-quarters of 12- to 17-year-olds reported they smoke cigars because they like the flavors. In 2020, more young people tried a cigar every day than tried a cigarette, reports the agency.

“This long-overdue decision will protect future generations of young people from nicotine addiction, especially Black children and communities, which have disproportionately suffered from menthol tobacco use due to targeted efforts from the tobacco industry,” Lee Savio Beers, MD, president of the American Academy of Pediatrics, said in a statement.

The FDA’s announcement “is only a first step that must be followed with urgent, comprehensive action to remove these flavored products from the market,” he said.

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

The Food and Drug Administration said that within a year it will ban menthol in cigarettes and ban all flavors including menthol in cigars.

Wikimedia Commons/FitzColinGerald/ Creative Commons License

Menthol makes it easier to start smoking, and also enhances the effects of nicotine, making it more addictive and harder to quit, the FDA said in announcing its actions on Thursday.

Nineteen organizations – including the American Academy of Pediatrics, American Cancer Society, American College of Chest Physicians, American Medical Association, American Heart Association, and the National Medical Association – have pushed the FDA to ban menthol for years. The agency banned all flavors in cigarettes in 2009 but did not take any action against menthol. In 2013, the groups filed a petition demanding that the FDA ban menthol, too. The agency responded months later with a notice that it would start the process.

But it never took any action. Action on Smoking and Health and the African American Tobacco Control Leadership Council, later joined by the AMA and the NMA, sued in 2020 to compel the agency to do something. Now it has finally agreed to act.

The African American Tobacco Control Leadership Council welcomed the move but said the fight is not over and encouraged tobacco control activists to fight to ban menthol tobacco products at the local, state and federal level. “We know that this rule-making process could take years and we know that the tobacco industry will continue to do everything in their power to derail any attempt to remove their deadly products from the market,” Phillip Gardiner, MD, council cochair, said in a statement.

The AMA is urging the FDA to quickly implement the ban and remove the products “without further delay,” AMA President Susan R. Bailey, MD, said in a statement.

“FDA’s long-awaited decision to take action to eliminate menthol flavoring in cigarettes and all flavors in cigars ends a decades-long deference to the tobacco industry, which has repeatedly demonstrated its willingness to profit from products that result in death,” Lisa Lacasse, president of the American Cancer Society Cancer Action Network, said in her own statement.

Ms. Lacasse said banning menthol will help eliminate health disparities. She said 86% of Black people who smoke use menthol cigarettes, compared with 46% of Hispanic people who smoke, 39% of Asian people who smoke, and 29% of White people who smoke. “FDA’s actions today send a clear message that Big Tobacco’s strategy to profit off addicting Black communities will no longer be tolerated,” she said.

Not all groups are on board, however. The American Civil Liberties Union and several other organizations wrote to the country’s top health officials urging them to reconsider.

“Such a ban will trigger criminal penalties which will disproportionately impact people of color, as well as prioritize criminalization over public health and harm reduction,” the letter says. “A ban will also lead to unconstitutional policing and other negative interactions with local law enforcement.”

The letter calls the proposed ban “well intentioned,” but said any effort to reduce death and disease from tobacco “must avoid solutions that will create yet another reason for armed police to engage citizens on the street based on pretext or conduct that does not pose a threat to public safety.”

Instead of a ban, the organizations said, policy makers should consider increased education for adults and minors, stop-smoking programs, and increased funding for health centers in communities of color.

The Biden administration, however, pressed the point that banning menthol will bring many positives. Acting FDA Commissioner Janet Woodcock, MD said in a statement that banning menthol “will help significantly reduce youth initiation, increase the chances of smoking cessation among current smokers, and address health disparities experienced by communities of color, low-income populations, and LGBTQ-plus individuals, all of whom are far more likely to use these tobacco products.”

The FDA cited data showing that, in the first year or so after a ban goes into effect, an additional 923,000 smokers would quit, including 230,000 African Americans. Another study suggests that 633,000 deaths would be averted, including 237,000 Black Americans.

Dr. Woodcock added that, “armed with strong scientific evidence, and with full support from the [Biden] administration, we believe these actions will launch us on a trajectory toward ending tobacco-related disease and death in the U.S.”

The FDA estimates that 18.6 million Americans who are current smokers use menthol cigarettes, with a disproportionately high number being Black people. Menthol cigarette use among Black and Hispanic youth increased from 2011 to 2018, but declined for non-Hispanic White youth.

Flavored mass-produced cigars and cigarillos are disproportionately popular among youth, especially non-Hispanic Black high school students, who in 2020 reported past 30-day cigar smoking at levels twice as high as their White counterparts, said the FDA. Three-quarters of 12- to 17-year-olds reported they smoke cigars because they like the flavors. In 2020, more young people tried a cigar every day than tried a cigarette, reports the agency.

“This long-overdue decision will protect future generations of young people from nicotine addiction, especially Black children and communities, which have disproportionately suffered from menthol tobacco use due to targeted efforts from the tobacco industry,” Lee Savio Beers, MD, president of the American Academy of Pediatrics, said in a statement.

The FDA’s announcement “is only a first step that must be followed with urgent, comprehensive action to remove these flavored products from the market,” he said.

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

The Food and Drug Administration said that within a year it will ban menthol in cigarettes and ban all flavors including menthol in cigars.

Wikimedia Commons/FitzColinGerald/ Creative Commons License

Menthol makes it easier to start smoking, and also enhances the effects of nicotine, making it more addictive and harder to quit, the FDA said in announcing its actions on Thursday.

Nineteen organizations – including the American Academy of Pediatrics, American Cancer Society, American College of Chest Physicians, American Medical Association, American Heart Association, and the National Medical Association – have pushed the FDA to ban menthol for years. The agency banned all flavors in cigarettes in 2009 but did not take any action against menthol. In 2013, the groups filed a petition demanding that the FDA ban menthol, too. The agency responded months later with a notice that it would start the process.

But it never took any action. Action on Smoking and Health and the African American Tobacco Control Leadership Council, later joined by the AMA and the NMA, sued in 2020 to compel the agency to do something. Now it has finally agreed to act.

The African American Tobacco Control Leadership Council welcomed the move but said the fight is not over and encouraged tobacco control activists to fight to ban menthol tobacco products at the local, state and federal level. “We know that this rule-making process could take years and we know that the tobacco industry will continue to do everything in their power to derail any attempt to remove their deadly products from the market,” Phillip Gardiner, MD, council cochair, said in a statement.

The AMA is urging the FDA to quickly implement the ban and remove the products “without further delay,” AMA President Susan R. Bailey, MD, said in a statement.

“FDA’s long-awaited decision to take action to eliminate menthol flavoring in cigarettes and all flavors in cigars ends a decades-long deference to the tobacco industry, which has repeatedly demonstrated its willingness to profit from products that result in death,” Lisa Lacasse, president of the American Cancer Society Cancer Action Network, said in her own statement.

Ms. Lacasse said banning menthol will help eliminate health disparities. She said 86% of Black people who smoke use menthol cigarettes, compared with 46% of Hispanic people who smoke, 39% of Asian people who smoke, and 29% of White people who smoke. “FDA’s actions today send a clear message that Big Tobacco’s strategy to profit off addicting Black communities will no longer be tolerated,” she said.

Not all groups are on board, however. The American Civil Liberties Union and several other organizations wrote to the country’s top health officials urging them to reconsider.

“Such a ban will trigger criminal penalties which will disproportionately impact people of color, as well as prioritize criminalization over public health and harm reduction,” the letter says. “A ban will also lead to unconstitutional policing and other negative interactions with local law enforcement.”

The letter calls the proposed ban “well intentioned,” but said any effort to reduce death and disease from tobacco “must avoid solutions that will create yet another reason for armed police to engage citizens on the street based on pretext or conduct that does not pose a threat to public safety.”

Instead of a ban, the organizations said, policy makers should consider increased education for adults and minors, stop-smoking programs, and increased funding for health centers in communities of color.

The Biden administration, however, pressed the point that banning menthol will bring many positives. Acting FDA Commissioner Janet Woodcock, MD said in a statement that banning menthol “will help significantly reduce youth initiation, increase the chances of smoking cessation among current smokers, and address health disparities experienced by communities of color, low-income populations, and LGBTQ-plus individuals, all of whom are far more likely to use these tobacco products.”

The FDA cited data showing that, in the first year or so after a ban goes into effect, an additional 923,000 smokers would quit, including 230,000 African Americans. Another study suggests that 633,000 deaths would be averted, including 237,000 Black Americans.

Dr. Woodcock added that, “armed with strong scientific evidence, and with full support from the [Biden] administration, we believe these actions will launch us on a trajectory toward ending tobacco-related disease and death in the U.S.”

The FDA estimates that 18.6 million Americans who are current smokers use menthol cigarettes, with a disproportionately high number being Black people. Menthol cigarette use among Black and Hispanic youth increased from 2011 to 2018, but declined for non-Hispanic White youth.

Flavored mass-produced cigars and cigarillos are disproportionately popular among youth, especially non-Hispanic Black high school students, who in 2020 reported past 30-day cigar smoking at levels twice as high as their White counterparts, said the FDA. Three-quarters of 12- to 17-year-olds reported they smoke cigars because they like the flavors. In 2020, more young people tried a cigar every day than tried a cigarette, reports the agency.

“This long-overdue decision will protect future generations of young people from nicotine addiction, especially Black children and communities, which have disproportionately suffered from menthol tobacco use due to targeted efforts from the tobacco industry,” Lee Savio Beers, MD, president of the American Academy of Pediatrics, said in a statement.

The FDA’s announcement “is only a first step that must be followed with urgent, comprehensive action to remove these flavored products from the market,” he said.

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

The investigational drug tolebrutinib effectively reduces brain lesions in patients with highly active relapsing remitting multiple sclerosis (MS), new research suggests. After 12 weeks of treatment, MRI revealed the drug, a Bruton tyrosine kinase inhibitor, was associated with a 93% reduction in new gadolinium-enhancing lesions and an 89% reduction in new and enlarging T2 lesions, compared with placebo.

The analysis supports that tolebrutinib is as effective in this group of patients with highly active relapsing remitting MS as it is in the overall patient population, study investigator said Anthony Traboulsee, MD, professor and research chair of the MS Society of Canada at the University of British Columbia, Vancouver.

“What is additionally exciting is that this effect was seen within a relatively short period of time – within 3 months. This will be important for patients and physicians to know how soon to expect a treatment to work if they have high-risk baseline features,” he added.

The findings were presented at the 2021 annual meeting of the American Academy of Neurology.
 

New drug class

BTK inhibitors are a new class of oral therapies, and phase 2 trials in patients with relapsing remitting MS show they are safe and effective. BTK inhibitors modulate B lymphocytes without causing depletion, thus reducing the risk for lymphopenia or immunoglobulin depletion.

Tolebrutinib is a covalent, irreversible BTK inhibitor that penetrates the central nervous system well. In a previous randomized, double-blind, phase 2b trial, it was well tolerated and was associated with a dose-dependent reduction in new or enlarging MRI lesions. Of the four doses studied, the 60-mg dose was the most effective.

Because highly active MS is associated with a more aggressive disease course, the investigators examined tolebrutinib’s efficacy and safety in patients with highly active disease who were participants in the phase 2b trial. This subgroup analysis had been predefined in the study’s statistical analysis plan.

The investigators defined highly active disease as one relapse in the year before screening and one or more gadolinium-enhancing lesions on MRI performed within 6 months before screening, or nine or more T2 lesions at baseline, or two or more relapses in the year before screening.

Of the 130 participants enrolled in the study, 61 (47%) met criteria for highly active disease at baseline. These patients represented 44% of the placebo group (29 of 66 participants) who later crossed over to tolebrutinib treatment.

At baseline, demographics in patients with highly active disease were similar to those of the overall study population, although it was slightly younger with slightly shorter disease duration, slightly less disability, and a greater likelihood of gadolinium-enhancing lesions at baseline versus the overall study population.

The proportion of patients with highly active disease was 36% in the 5-mg group, 59% in the 15-mg group, 48% in the 30-mg group, and 44% in the 60-mg group.

The study’s primary objective was to examine the dose-response relationship after 12 weeks of treatment with tolebrutinib.
 

Good safety, tolerability

After 12 weeks, the mean number of new gadolinium-enhancing lesions in patients with highly active disease was 0.82 in the 5-mg group, 0.50 in the 15-mg group, 0.38 in the 30-mg group, and 0.08 in the 60-mg group. The corresponding measurements in the overall study population were 1.39 in the 5-mg group, 0.77 in the 15-mg group, 0.76 in the 30-mg group, and 0.13 in the 60-mg group.

After 12 weeks, numbers of new or enlarging T2 lesions among patients with highly active disease were 1.09 (5 mg), 0.89 (15 mg), 0.75 (30 mg) and 0.15 (60 mg). The corresponding measurements in the overall population were 1.90 (5 mg), 1.32 (15 mg) 1.30 (30 mg) and 0.23 (60 mg).

Tolebrutinib had excellent safety and tolerability in patients with highly active disease and in the overall population, said Dr. Traboulsee.

No adverse events were linked to the study drug. One patient with highly active disease who received 60 mg of tolebrutinib had transient elevated ALT levels greater than three times the upper limit of normal. This patient also previously had elevated ALT at baseline.

One serious adverse event occurred during the study. One patient was hospitalized for MS relapse. The patient had been assigned to the 60-mg dose of tolebrutinib. The patient recovered and remained on study treatment.

Two independent studies have indicated that BTK inhibition is an effective treatment approach for relapsing remitting MS. The main advantage of tolebrutinib is its ability to penetrate the CNS.

“Most, if not all, MS therapies mostly affect the peripheral immune system, preventing autoreactive lymphocytes crossing the blood-brain barrier and causing damage,” said Dr. Traboulsee.

Therapies that enter the CNS can target abnormal immune cells, including microglia that are believed to promote disease progression. “If this is an important target, then we now have a highly CNS-penetrant drug that could potentially change the course of progression,” said Dr. Traboulsee.

Serum biomarkers and advanced imaging data collected during the phase 2 trial could help clarify the mechanisms of disease progression and the effects of tolebrutinib, he added. “Ultimately though, it is the clinical outcomes in the phase 3 programs that are essential to know where to place tolebrutinib in the future care of relapsing and progressive forms of MS.”
 

Not an unmet need

Commenting on the findings, Joseph R. Berger, MD, professor of neurology and associate chief of the MS division at the University of Pennsylvania, Philadelphia, said there are several available treatments that effectively suppress clinical and radiologic evidence of acute inflammation in relapsing remitting MS.

“Any new drug that is to be added to that pharmacological armamentarium should have distinct advantages over what is currently available. Treating relapsing remitting MS is not, in my opinion, an unmet need in MS; treating progressive disease is,” he said.

Dr. Berger said that tolebrutinib appears to be better than placebo in suppressing disease activity, particularly at higher doses. “However, the study is small – only 61 patients,” noted Dr. Berger, who was not involved in the study.

In addition, disease activity was assessed after 4 weeks with placebo and at 12 weeks with tolebrutinib treatment.

“As there is a regression to the mean with respect to disease activity, the interpretation of the apparent response to tolebrutinib needs to be tempered with that in mind,” said Dr. Berger.

Evaluating how tolebrutinib compares with other BTK inhibitors will require a head-to-head trial. “I’d be more interested in whether the drug has an effect on progressive disease,” Dr. Berger concluded.

The study was supported by Sanofi Genzyme, which is developing tolebrutinib. Dr. Traboulsee has received research grant support, honoraria for consulting, and honoraria for participating in a speakers’ bureau from Sanofi Genzyme. Dr. Berger disclosed no relevant financial relationships.

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

The investigational drug tolebrutinib effectively reduces brain lesions in patients with highly active relapsing remitting multiple sclerosis (MS), new research suggests. After 12 weeks of treatment, MRI revealed the drug, a Bruton tyrosine kinase inhibitor, was associated with a 93% reduction in new gadolinium-enhancing lesions and an 89% reduction in new and enlarging T2 lesions, compared with placebo.

The analysis supports that tolebrutinib is as effective in this group of patients with highly active relapsing remitting MS as it is in the overall patient population, study investigator said Anthony Traboulsee, MD, professor and research chair of the MS Society of Canada at the University of British Columbia, Vancouver.

“What is additionally exciting is that this effect was seen within a relatively short period of time – within 3 months. This will be important for patients and physicians to know how soon to expect a treatment to work if they have high-risk baseline features,” he added.

The findings were presented at the 2021 annual meeting of the American Academy of Neurology.
 

New drug class

BTK inhibitors are a new class of oral therapies, and phase 2 trials in patients with relapsing remitting MS show they are safe and effective. BTK inhibitors modulate B lymphocytes without causing depletion, thus reducing the risk for lymphopenia or immunoglobulin depletion.

Tolebrutinib is a covalent, irreversible BTK inhibitor that penetrates the central nervous system well. In a previous randomized, double-blind, phase 2b trial, it was well tolerated and was associated with a dose-dependent reduction in new or enlarging MRI lesions. Of the four doses studied, the 60-mg dose was the most effective.

Because highly active MS is associated with a more aggressive disease course, the investigators examined tolebrutinib’s efficacy and safety in patients with highly active disease who were participants in the phase 2b trial. This subgroup analysis had been predefined in the study’s statistical analysis plan.

The investigators defined highly active disease as one relapse in the year before screening and one or more gadolinium-enhancing lesions on MRI performed within 6 months before screening, or nine or more T2 lesions at baseline, or two or more relapses in the year before screening.

Of the 130 participants enrolled in the study, 61 (47%) met criteria for highly active disease at baseline. These patients represented 44% of the placebo group (29 of 66 participants) who later crossed over to tolebrutinib treatment.

At baseline, demographics in patients with highly active disease were similar to those of the overall study population, although it was slightly younger with slightly shorter disease duration, slightly less disability, and a greater likelihood of gadolinium-enhancing lesions at baseline versus the overall study population.

The proportion of patients with highly active disease was 36% in the 5-mg group, 59% in the 15-mg group, 48% in the 30-mg group, and 44% in the 60-mg group.

The study’s primary objective was to examine the dose-response relationship after 12 weeks of treatment with tolebrutinib.
 

Good safety, tolerability

After 12 weeks, the mean number of new gadolinium-enhancing lesions in patients with highly active disease was 0.82 in the 5-mg group, 0.50 in the 15-mg group, 0.38 in the 30-mg group, and 0.08 in the 60-mg group. The corresponding measurements in the overall study population were 1.39 in the 5-mg group, 0.77 in the 15-mg group, 0.76 in the 30-mg group, and 0.13 in the 60-mg group.

After 12 weeks, numbers of new or enlarging T2 lesions among patients with highly active disease were 1.09 (5 mg), 0.89 (15 mg), 0.75 (30 mg) and 0.15 (60 mg). The corresponding measurements in the overall population were 1.90 (5 mg), 1.32 (15 mg) 1.30 (30 mg) and 0.23 (60 mg).

Tolebrutinib had excellent safety and tolerability in patients with highly active disease and in the overall population, said Dr. Traboulsee.

No adverse events were linked to the study drug. One patient with highly active disease who received 60 mg of tolebrutinib had transient elevated ALT levels greater than three times the upper limit of normal. This patient also previously had elevated ALT at baseline.

One serious adverse event occurred during the study. One patient was hospitalized for MS relapse. The patient had been assigned to the 60-mg dose of tolebrutinib. The patient recovered and remained on study treatment.

Two independent studies have indicated that BTK inhibition is an effective treatment approach for relapsing remitting MS. The main advantage of tolebrutinib is its ability to penetrate the CNS.

“Most, if not all, MS therapies mostly affect the peripheral immune system, preventing autoreactive lymphocytes crossing the blood-brain barrier and causing damage,” said Dr. Traboulsee.

Therapies that enter the CNS can target abnormal immune cells, including microglia that are believed to promote disease progression. “If this is an important target, then we now have a highly CNS-penetrant drug that could potentially change the course of progression,” said Dr. Traboulsee.

Serum biomarkers and advanced imaging data collected during the phase 2 trial could help clarify the mechanisms of disease progression and the effects of tolebrutinib, he added. “Ultimately though, it is the clinical outcomes in the phase 3 programs that are essential to know where to place tolebrutinib in the future care of relapsing and progressive forms of MS.”
 

Not an unmet need

Commenting on the findings, Joseph R. Berger, MD, professor of neurology and associate chief of the MS division at the University of Pennsylvania, Philadelphia, said there are several available treatments that effectively suppress clinical and radiologic evidence of acute inflammation in relapsing remitting MS.

“Any new drug that is to be added to that pharmacological armamentarium should have distinct advantages over what is currently available. Treating relapsing remitting MS is not, in my opinion, an unmet need in MS; treating progressive disease is,” he said.

Dr. Berger said that tolebrutinib appears to be better than placebo in suppressing disease activity, particularly at higher doses. “However, the study is small – only 61 patients,” noted Dr. Berger, who was not involved in the study.

In addition, disease activity was assessed after 4 weeks with placebo and at 12 weeks with tolebrutinib treatment.

“As there is a regression to the mean with respect to disease activity, the interpretation of the apparent response to tolebrutinib needs to be tempered with that in mind,” said Dr. Berger.

Evaluating how tolebrutinib compares with other BTK inhibitors will require a head-to-head trial. “I’d be more interested in whether the drug has an effect on progressive disease,” Dr. Berger concluded.

The study was supported by Sanofi Genzyme, which is developing tolebrutinib. Dr. Traboulsee has received research grant support, honoraria for consulting, and honoraria for participating in a speakers’ bureau from Sanofi Genzyme. Dr. Berger disclosed no relevant financial relationships.

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

The investigational drug tolebrutinib effectively reduces brain lesions in patients with highly active relapsing remitting multiple sclerosis (MS), new research suggests. After 12 weeks of treatment, MRI revealed the drug, a Bruton tyrosine kinase inhibitor, was associated with a 93% reduction in new gadolinium-enhancing lesions and an 89% reduction in new and enlarging T2 lesions, compared with placebo.

The analysis supports that tolebrutinib is as effective in this group of patients with highly active relapsing remitting MS as it is in the overall patient population, study investigator said Anthony Traboulsee, MD, professor and research chair of the MS Society of Canada at the University of British Columbia, Vancouver.

“What is additionally exciting is that this effect was seen within a relatively short period of time – within 3 months. This will be important for patients and physicians to know how soon to expect a treatment to work if they have high-risk baseline features,” he added.

The findings were presented at the 2021 annual meeting of the American Academy of Neurology.
 

New drug class

BTK inhibitors are a new class of oral therapies, and phase 2 trials in patients with relapsing remitting MS show they are safe and effective. BTK inhibitors modulate B lymphocytes without causing depletion, thus reducing the risk for lymphopenia or immunoglobulin depletion.

Tolebrutinib is a covalent, irreversible BTK inhibitor that penetrates the central nervous system well. In a previous randomized, double-blind, phase 2b trial, it was well tolerated and was associated with a dose-dependent reduction in new or enlarging MRI lesions. Of the four doses studied, the 60-mg dose was the most effective.

Because highly active MS is associated with a more aggressive disease course, the investigators examined tolebrutinib’s efficacy and safety in patients with highly active disease who were participants in the phase 2b trial. This subgroup analysis had been predefined in the study’s statistical analysis plan.

The investigators defined highly active disease as one relapse in the year before screening and one or more gadolinium-enhancing lesions on MRI performed within 6 months before screening, or nine or more T2 lesions at baseline, or two or more relapses in the year before screening.

Of the 130 participants enrolled in the study, 61 (47%) met criteria for highly active disease at baseline. These patients represented 44% of the placebo group (29 of 66 participants) who later crossed over to tolebrutinib treatment.

At baseline, demographics in patients with highly active disease were similar to those of the overall study population, although it was slightly younger with slightly shorter disease duration, slightly less disability, and a greater likelihood of gadolinium-enhancing lesions at baseline versus the overall study population.

The proportion of patients with highly active disease was 36% in the 5-mg group, 59% in the 15-mg group, 48% in the 30-mg group, and 44% in the 60-mg group.

The study’s primary objective was to examine the dose-response relationship after 12 weeks of treatment with tolebrutinib.
 

Good safety, tolerability

After 12 weeks, the mean number of new gadolinium-enhancing lesions in patients with highly active disease was 0.82 in the 5-mg group, 0.50 in the 15-mg group, 0.38 in the 30-mg group, and 0.08 in the 60-mg group. The corresponding measurements in the overall study population were 1.39 in the 5-mg group, 0.77 in the 15-mg group, 0.76 in the 30-mg group, and 0.13 in the 60-mg group.

After 12 weeks, numbers of new or enlarging T2 lesions among patients with highly active disease were 1.09 (5 mg), 0.89 (15 mg), 0.75 (30 mg) and 0.15 (60 mg). The corresponding measurements in the overall population were 1.90 (5 mg), 1.32 (15 mg) 1.30 (30 mg) and 0.23 (60 mg).

Tolebrutinib had excellent safety and tolerability in patients with highly active disease and in the overall population, said Dr. Traboulsee.

No adverse events were linked to the study drug. One patient with highly active disease who received 60 mg of tolebrutinib had transient elevated ALT levels greater than three times the upper limit of normal. This patient also previously had elevated ALT at baseline.

One serious adverse event occurred during the study. One patient was hospitalized for MS relapse. The patient had been assigned to the 60-mg dose of tolebrutinib. The patient recovered and remained on study treatment.

Two independent studies have indicated that BTK inhibition is an effective treatment approach for relapsing remitting MS. The main advantage of tolebrutinib is its ability to penetrate the CNS.

“Most, if not all, MS therapies mostly affect the peripheral immune system, preventing autoreactive lymphocytes crossing the blood-brain barrier and causing damage,” said Dr. Traboulsee.

Therapies that enter the CNS can target abnormal immune cells, including microglia that are believed to promote disease progression. “If this is an important target, then we now have a highly CNS-penetrant drug that could potentially change the course of progression,” said Dr. Traboulsee.

Serum biomarkers and advanced imaging data collected during the phase 2 trial could help clarify the mechanisms of disease progression and the effects of tolebrutinib, he added. “Ultimately though, it is the clinical outcomes in the phase 3 programs that are essential to know where to place tolebrutinib in the future care of relapsing and progressive forms of MS.”
 

Not an unmet need

Commenting on the findings, Joseph R. Berger, MD, professor of neurology and associate chief of the MS division at the University of Pennsylvania, Philadelphia, said there are several available treatments that effectively suppress clinical and radiologic evidence of acute inflammation in relapsing remitting MS.

“Any new drug that is to be added to that pharmacological armamentarium should have distinct advantages over what is currently available. Treating relapsing remitting MS is not, in my opinion, an unmet need in MS; treating progressive disease is,” he said.

Dr. Berger said that tolebrutinib appears to be better than placebo in suppressing disease activity, particularly at higher doses. “However, the study is small – only 61 patients,” noted Dr. Berger, who was not involved in the study.

In addition, disease activity was assessed after 4 weeks with placebo and at 12 weeks with tolebrutinib treatment.

“As there is a regression to the mean with respect to disease activity, the interpretation of the apparent response to tolebrutinib needs to be tempered with that in mind,” said Dr. Berger.

Evaluating how tolebrutinib compares with other BTK inhibitors will require a head-to-head trial. “I’d be more interested in whether the drug has an effect on progressive disease,” Dr. Berger concluded.

The study was supported by Sanofi Genzyme, which is developing tolebrutinib. Dr. Traboulsee has received research grant support, honoraria for consulting, and honoraria for participating in a speakers’ bureau from Sanofi Genzyme. Dr. Berger disclosed no relevant financial relationships.

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

COVID-19 survivors are at risk from a possible second pandemic, this time of opioid addiction, given the high rate of painkillers being prescribed to these patients, health experts say.

sdominick/Getty Images

A new study in Nature found alarmingly high rates of opioid use among COVID survivors with lingering symptoms at Veterans Affairs facilities. About 10% of COVID survivors develop “long COVID,” struggling with often disabling health problems even 6 months or longer after a diagnosis.

For every 1,000 long-COVID patients, known as “long-haulers,” who were treated at a VA facility, doctors wrote nine more prescriptions for opioids than they otherwise would have, along with 22 additional prescriptions for benzodiazepines, which include Xanax and other addictive pills used to treat anxiety.

Although previous studies have found many COVID survivors experience persistent health problems, the new article is the first to show they’re using more addictive medications, said Ziyad Al-Aly, MD, the paper’s lead author.

He’s concerned that even an apparently small increase in the inappropriate use of addictive pain pills will lead to a resurgence of the prescription opioid crisis, given the large number of COVID survivors. More than 3 million of the 31 million Americans infected with COVID develop long-term symptoms, which can include fatigue, shortness of breath, depression, anxiety, and memory problems known as “brain fog.”

The new study also found many patients have significant muscle and bone pain.

The frequent use of opioids was surprising, given concerns about their potential for addiction, said Dr. Al-Aly, chief of research and education service at the VA St. Louis Health Care System.

“Physicians now are supposed to shy away from prescribing opioids,” said Dr. Al-Aly, who studied more than 73,000 patients in the VA system. When Dr. Al-Aly saw the number of opioids prescriptions, he said, he thought to himself: “Is this really happening all over again?”

Doctors need to act now, before “it’s too late to do something,” Dr. Al-Aly said. “We must act now and ensure that people are getting the care they need. We do not want this to balloon into a suicide crisis or another opioid epidemic.”

As more doctors became aware of their addictive potential, new opioid prescriptions fell, by more than half since 2012. But U.S. doctors still prescribe far more of the drugs – which include OxyContin, Vicodin, and codeine – than physicians in other countries, said Andrew Kolodny, MD, medical director of opioid policy research at Brandeis University, Waltham, Mass.

Some patients who became addicted to prescription painkillers switched to heroin, either because it was cheaper or because they could no longer obtain opioids from their doctors. Overdose deaths surged in recent years as drug dealers began spiking heroin with a powerful synthetic opioid called fentanyl.

More than 88,000 Americans died from overdoses during the 12 months ending in August 2020, according to the Centers for Disease Control and Prevention. Health experts now advise doctors to avoid prescribing opioids for long periods.

The new study “suggests to me that many clinicians still don’t get it,” Dr. Kolodny said. “Many clinicians are under the false impression that opioids are appropriate for chronic pain patients.”

Hospitalized COVID patients often receive a lot of medication to control pain and anxiety, especially in ICUs, said Greg Martin, MD, president of the Society of Critical Care Medicine. Patients placed on ventilators, for example, are often sedated to make them more comfortable.

Martin said he’s concerned by the study’s findings, which suggest patients are unnecessarily continuing medications after leaving the hospital.

“I worry that COVID-19 patients, especially those who are severely and critically ill, receive a lot of medications during the hospitalization, and because they have persistent symptoms, the medications are continued after hospital discharge,” Dr. Martin said.

While some COVID patients are experiencing muscle and bone pain for the first time, others say the illness has intensified their preexisting pain.

Rachael Sunshine Burnett has suffered from chronic pain in her back and feet for 20 years, ever since an accident at a warehouse where she once worked. But Ms. Burnett, who first was diagnosed with COVID in April 2020, said the pain soon became 10 times worse and spread to the area between her shoulders and spine. Although she was already taking long-acting OxyContin twice a day, her doctor prescribed an additional opioid called oxycodone, which relieves pain immediately. She was reinfected with COVID in December.

“It’s been a horrible, horrible year,” said Ms. Burnett, 43, of Coxsackie, N.Y.

Doctors should recognize that pain can be a part of long COVID, Dr. Martin said. “We need to find the proper nonnarcotic treatment for it, just like we do with other forms of chronic pain,” he said.

The CDC recommends a number of alternatives to opioids – from physical therapy to biofeedback, over-the-counter anti-inflammatories, antidepressants, and antiseizure drugs that also relieve nerve pain.

The country also needs an overall strategy to cope with the wave of post-COVID complications, Dr. Al-Aly said.

“It’s better to be prepared than to be caught off guard years from now, when doctors realize: ‘Oh, we have a resurgence in opioids,’ ” Dr. Al-Aly said.

Dr. Al-Aly noted that his study may not capture the full complexity of post-COVID patient needs. Although women make up the majority of long-COVID patients in most studies, most patients in the VA system are men.

The study of VA patients makes it “abundantly clear that we are not prepared to meet the needs of 3 million Americans with long COVID,” said Eric Topol, MD, founder and director of the Scripps Research Translational Institute in San Diego. “We desperately need an intervention that will effectively treat these individuals.”

Dr. Al-Aly said COVID survivors may need care for years.

“That’s going to be a huge, significant burden on the health care system,” Dr. Al-Aly said. “Long COVID will reverberate in the health system for years or even decades to come.”

Kaiser Health News is a nonprofit news service covering health issues. It is an editorially independent program of KFF (Kaiser Family Foundation), which is not affiliated with Kaiser Permanente.

COVID-19 survivors are at risk from a possible second pandemic, this time of opioid addiction, given the high rate of painkillers being prescribed to these patients, health experts say.

sdominick/Getty Images

A new study in Nature found alarmingly high rates of opioid use among COVID survivors with lingering symptoms at Veterans Affairs facilities. About 10% of COVID survivors develop “long COVID,” struggling with often disabling health problems even 6 months or longer after a diagnosis.

For every 1,000 long-COVID patients, known as “long-haulers,” who were treated at a VA facility, doctors wrote nine more prescriptions for opioids than they otherwise would have, along with 22 additional prescriptions for benzodiazepines, which include Xanax and other addictive pills used to treat anxiety.

Although previous studies have found many COVID survivors experience persistent health problems, the new article is the first to show they’re using more addictive medications, said Ziyad Al-Aly, MD, the paper’s lead author.

He’s concerned that even an apparently small increase in the inappropriate use of addictive pain pills will lead to a resurgence of the prescription opioid crisis, given the large number of COVID survivors. More than 3 million of the 31 million Americans infected with COVID develop long-term symptoms, which can include fatigue, shortness of breath, depression, anxiety, and memory problems known as “brain fog.”

The new study also found many patients have significant muscle and bone pain.

The frequent use of opioids was surprising, given concerns about their potential for addiction, said Dr. Al-Aly, chief of research and education service at the VA St. Louis Health Care System.

“Physicians now are supposed to shy away from prescribing opioids,” said Dr. Al-Aly, who studied more than 73,000 patients in the VA system. When Dr. Al-Aly saw the number of opioids prescriptions, he said, he thought to himself: “Is this really happening all over again?”

Doctors need to act now, before “it’s too late to do something,” Dr. Al-Aly said. “We must act now and ensure that people are getting the care they need. We do not want this to balloon into a suicide crisis or another opioid epidemic.”

As more doctors became aware of their addictive potential, new opioid prescriptions fell, by more than half since 2012. But U.S. doctors still prescribe far more of the drugs – which include OxyContin, Vicodin, and codeine – than physicians in other countries, said Andrew Kolodny, MD, medical director of opioid policy research at Brandeis University, Waltham, Mass.

Some patients who became addicted to prescription painkillers switched to heroin, either because it was cheaper or because they could no longer obtain opioids from their doctors. Overdose deaths surged in recent years as drug dealers began spiking heroin with a powerful synthetic opioid called fentanyl.

More than 88,000 Americans died from overdoses during the 12 months ending in August 2020, according to the Centers for Disease Control and Prevention. Health experts now advise doctors to avoid prescribing opioids for long periods.

The new study “suggests to me that many clinicians still don’t get it,” Dr. Kolodny said. “Many clinicians are under the false impression that opioids are appropriate for chronic pain patients.”

Hospitalized COVID patients often receive a lot of medication to control pain and anxiety, especially in ICUs, said Greg Martin, MD, president of the Society of Critical Care Medicine. Patients placed on ventilators, for example, are often sedated to make them more comfortable.

Martin said he’s concerned by the study’s findings, which suggest patients are unnecessarily continuing medications after leaving the hospital.

“I worry that COVID-19 patients, especially those who are severely and critically ill, receive a lot of medications during the hospitalization, and because they have persistent symptoms, the medications are continued after hospital discharge,” Dr. Martin said.

While some COVID patients are experiencing muscle and bone pain for the first time, others say the illness has intensified their preexisting pain.

Rachael Sunshine Burnett has suffered from chronic pain in her back and feet for 20 years, ever since an accident at a warehouse where she once worked. But Ms. Burnett, who first was diagnosed with COVID in April 2020, said the pain soon became 10 times worse and spread to the area between her shoulders and spine. Although she was already taking long-acting OxyContin twice a day, her doctor prescribed an additional opioid called oxycodone, which relieves pain immediately. She was reinfected with COVID in December.

“It’s been a horrible, horrible year,” said Ms. Burnett, 43, of Coxsackie, N.Y.

Doctors should recognize that pain can be a part of long COVID, Dr. Martin said. “We need to find the proper nonnarcotic treatment for it, just like we do with other forms of chronic pain,” he said.

The CDC recommends a number of alternatives to opioids – from physical therapy to biofeedback, over-the-counter anti-inflammatories, antidepressants, and antiseizure drugs that also relieve nerve pain.

The country also needs an overall strategy to cope with the wave of post-COVID complications, Dr. Al-Aly said.

“It’s better to be prepared than to be caught off guard years from now, when doctors realize: ‘Oh, we have a resurgence in opioids,’ ” Dr. Al-Aly said.

Dr. Al-Aly noted that his study may not capture the full complexity of post-COVID patient needs. Although women make up the majority of long-COVID patients in most studies, most patients in the VA system are men.

The study of VA patients makes it “abundantly clear that we are not prepared to meet the needs of 3 million Americans with long COVID,” said Eric Topol, MD, founder and director of the Scripps Research Translational Institute in San Diego. “We desperately need an intervention that will effectively treat these individuals.”

Dr. Al-Aly said COVID survivors may need care for years.

“That’s going to be a huge, significant burden on the health care system,” Dr. Al-Aly said. “Long COVID will reverberate in the health system for years or even decades to come.”

Kaiser Health News is a nonprofit news service covering health issues. It is an editorially independent program of KFF (Kaiser Family Foundation), which is not affiliated with Kaiser Permanente.

COVID-19 survivors are at risk from a possible second pandemic, this time of opioid addiction, given the high rate of painkillers being prescribed to these patients, health experts say.

sdominick/Getty Images

A new study in Nature found alarmingly high rates of opioid use among COVID survivors with lingering symptoms at Veterans Affairs facilities. About 10% of COVID survivors develop “long COVID,” struggling with often disabling health problems even 6 months or longer after a diagnosis.

For every 1,000 long-COVID patients, known as “long-haulers,” who were treated at a VA facility, doctors wrote nine more prescriptions for opioids than they otherwise would have, along with 22 additional prescriptions for benzodiazepines, which include Xanax and other addictive pills used to treat anxiety.

Although previous studies have found many COVID survivors experience persistent health problems, the new article is the first to show they’re using more addictive medications, said Ziyad Al-Aly, MD, the paper’s lead author.

He’s concerned that even an apparently small increase in the inappropriate use of addictive pain pills will lead to a resurgence of the prescription opioid crisis, given the large number of COVID survivors. More than 3 million of the 31 million Americans infected with COVID develop long-term symptoms, which can include fatigue, shortness of breath, depression, anxiety, and memory problems known as “brain fog.”

The new study also found many patients have significant muscle and bone pain.

The frequent use of opioids was surprising, given concerns about their potential for addiction, said Dr. Al-Aly, chief of research and education service at the VA St. Louis Health Care System.

“Physicians now are supposed to shy away from prescribing opioids,” said Dr. Al-Aly, who studied more than 73,000 patients in the VA system. When Dr. Al-Aly saw the number of opioids prescriptions, he said, he thought to himself: “Is this really happening all over again?”

Doctors need to act now, before “it’s too late to do something,” Dr. Al-Aly said. “We must act now and ensure that people are getting the care they need. We do not want this to balloon into a suicide crisis or another opioid epidemic.”

As more doctors became aware of their addictive potential, new opioid prescriptions fell, by more than half since 2012. But U.S. doctors still prescribe far more of the drugs – which include OxyContin, Vicodin, and codeine – than physicians in other countries, said Andrew Kolodny, MD, medical director of opioid policy research at Brandeis University, Waltham, Mass.

Some patients who became addicted to prescription painkillers switched to heroin, either because it was cheaper or because they could no longer obtain opioids from their doctors. Overdose deaths surged in recent years as drug dealers began spiking heroin with a powerful synthetic opioid called fentanyl.

More than 88,000 Americans died from overdoses during the 12 months ending in August 2020, according to the Centers for Disease Control and Prevention. Health experts now advise doctors to avoid prescribing opioids for long periods.

The new study “suggests to me that many clinicians still don’t get it,” Dr. Kolodny said. “Many clinicians are under the false impression that opioids are appropriate for chronic pain patients.”

Hospitalized COVID patients often receive a lot of medication to control pain and anxiety, especially in ICUs, said Greg Martin, MD, president of the Society of Critical Care Medicine. Patients placed on ventilators, for example, are often sedated to make them more comfortable.

Martin said he’s concerned by the study’s findings, which suggest patients are unnecessarily continuing medications after leaving the hospital.

“I worry that COVID-19 patients, especially those who are severely and critically ill, receive a lot of medications during the hospitalization, and because they have persistent symptoms, the medications are continued after hospital discharge,” Dr. Martin said.

While some COVID patients are experiencing muscle and bone pain for the first time, others say the illness has intensified their preexisting pain.

Rachael Sunshine Burnett has suffered from chronic pain in her back and feet for 20 years, ever since an accident at a warehouse where she once worked. But Ms. Burnett, who first was diagnosed with COVID in April 2020, said the pain soon became 10 times worse and spread to the area between her shoulders and spine. Although she was already taking long-acting OxyContin twice a day, her doctor prescribed an additional opioid called oxycodone, which relieves pain immediately. She was reinfected with COVID in December.

“It’s been a horrible, horrible year,” said Ms. Burnett, 43, of Coxsackie, N.Y.

Doctors should recognize that pain can be a part of long COVID, Dr. Martin said. “We need to find the proper nonnarcotic treatment for it, just like we do with other forms of chronic pain,” he said.

The CDC recommends a number of alternatives to opioids – from physical therapy to biofeedback, over-the-counter anti-inflammatories, antidepressants, and antiseizure drugs that also relieve nerve pain.

The country also needs an overall strategy to cope with the wave of post-COVID complications, Dr. Al-Aly said.

“It’s better to be prepared than to be caught off guard years from now, when doctors realize: ‘Oh, we have a resurgence in opioids,’ ” Dr. Al-Aly said.

Dr. Al-Aly noted that his study may not capture the full complexity of post-COVID patient needs. Although women make up the majority of long-COVID patients in most studies, most patients in the VA system are men.

The study of VA patients makes it “abundantly clear that we are not prepared to meet the needs of 3 million Americans with long COVID,” said Eric Topol, MD, founder and director of the Scripps Research Translational Institute in San Diego. “We desperately need an intervention that will effectively treat these individuals.”

Dr. Al-Aly said COVID survivors may need care for years.

“That’s going to be a huge, significant burden on the health care system,” Dr. Al-Aly said. “Long COVID will reverberate in the health system for years or even decades to come.”

Kaiser Health News is a nonprofit news service covering health issues. It is an editorially independent program of KFF (Kaiser Family Foundation), which is not affiliated with Kaiser Permanente.