Jim Kling

A new model of gastric cancer screening suggests that, for Asian Americans, endoscopic screening alongside colonoscopy and follow-up surveillance of gastric preneoplasia is a cost-effective strategy. Incremental cost-effectiveness ratios (ICERs) were lowest for Chinese, Japanese, and Korean Americans. The model simulated results for asymptomatic 50-year-old subjects.

Gastric cancer risk is highest in Asian Pacific, Latin American, and Eastern European countries. Asia Pacific countries alone represent about half of all new cases. Helicobacter pylori–related gastritis is the strongest known risk factor for intestinal-type noncardia gastric adenocarcinoma (NCGA), which is the most common gastric cancer, and this chronic inflammation can lead to gastric intestinal metaplasia (GIM). Individuals with GIM have a 0.16% increased annual risk of NCGA, which makes them good candidates for endoscopic screening that could catch new cancers at an early stage.

In a previous study (Gastroenterology. 2018 May 17;155[3]:648-60), researchers at Vanderbilt University Medical Center in Durham, N.C., at Boston University School of Medicine, and at the University of Pennsylvania in Philadelphia showed that, in asymptomatic 50-year-old Asian Americans, Hispanic patients, and non-Hispanic Black patients, performing a single esophagogastroduodenoscopy (EGD) concomitantly with a colonoscopy, followed by screening EGDs if indicated (such as for a GIM diagnosis), is a cost-effective strategy. They found ongoing screening was not cost effective if the original results were normal.

In the new study published in Gastroenterology and Hepatology, the researchers followed up this finding with an attempt to tease out the cost-effectiveness of screening in different subgroups, as well as by sex. They built a Markov decision model focusing on the six most common Asian groups in the United States: Chinese, Filipino, Southeast Asian, Vietnamese, Korean, and Japanese Americans.

Model inputs were based on the published literature, and the outputs were compared with data from the Surveillance, Epidemiology, and End Results (SEER) data for disaggregated Asian Americans between 2001 and 2014 and separately with the California Cancer Registry (2011-2015). The model produced a good fit to the epidemiological data.

The model then compared cost-effectiveness of three hypothetical screening strategies in asymptomatic 50-year-old Asian Americans: one-time upper EGD with biopsies conducted at the time of colonoscopies for colorectal cancer screening, followed by EGDs every 3 years if GIM was detected (or other appropriate management of higher-grade pathology); EGD with biopsy at a colonoscopy for CRC screening followed by EGD biennially regardless of initial findings; and no endoscopy screening.

The one-time EGD strategy was the most cost-effective, regardless of sex, with an ICER of $75,959 per quality-adjusted life-year (QALY) in males and $74,329/QALY in females. The lowest ICER was found for Chinese Americans (males and females, $68,256/QALY), followed by Japanese Americans (males, $69,011/QALY; females, $73,748/QALY), and Korean Americans (males, $70,739/ QALY; females, $70,236/QALY). The highest ICERs were among Filipino American males and females, but the strategy was still cost-effective at the predetermined willingness-to-pay threshold of $100,000 ($83,732/QALY).

In all ethnic groups, the biennial screening strategy produced more harm than good and was costlier.

The authors believe that the strategy could be applied to other ethnic groups that come from countries with populations at higher relative risk of gastric cancer, such as Central and Latin American countries.

Asked to comment on the study, Mimi Tan, MD, an assistant professor of gastroenterology at Baylor College of Medicine in Houston, suggested that the estimates of precancerous lesions used in the Markov model were quite high because they were based on pathology databases. These sources tend to be biased toward symptomatic individuals since these are the patients typically referred for upper endoscopy biopsies. “Therefore, these probabilities may not represent true probability of these precancerous lesions among asymptomatic screening populations,” Dr. Tan said in an interview. She also questioned whether the study represented the true risk in female populations since the literature for women is sparse.

Dr. Tan suggested that a more cost-effective screening strategy might be one-time H. pylori immunoglobulin G testing in Asian Americans. The Houston Consensus Conference on Testing for H. pylori Infection already recommends testing for first-generation immigrants from high prevalence areas and Latino and African American racial or ethnic groups (Clin Gastroenterol Hepatol. 2018 Jul;16[7]:992-1002). “Future studies should compare cost-effectiveness of one-time upper endoscopy, which is more costly but able to detect premalignant lesions, to one-time H. pylori testing,” said Dr. Tan.

SOURCE: Shah SC et al. Clin Gastroenterol Hepatol. 2020 July 21. doi: 10.1016/j.cgh.2020.07.031.

A new model of gastric cancer screening suggests that, for Asian Americans, endoscopic screening alongside colonoscopy and follow-up surveillance of gastric preneoplasia is a cost-effective strategy. Incremental cost-effectiveness ratios (ICERs) were lowest for Chinese, Japanese, and Korean Americans. The model simulated results for asymptomatic 50-year-old subjects.

Gastric cancer risk is highest in Asian Pacific, Latin American, and Eastern European countries. Asia Pacific countries alone represent about half of all new cases. Helicobacter pylori–related gastritis is the strongest known risk factor for intestinal-type noncardia gastric adenocarcinoma (NCGA), which is the most common gastric cancer, and this chronic inflammation can lead to gastric intestinal metaplasia (GIM). Individuals with GIM have a 0.16% increased annual risk of NCGA, which makes them good candidates for endoscopic screening that could catch new cancers at an early stage.

In a previous study (Gastroenterology. 2018 May 17;155[3]:648-60), researchers at Vanderbilt University Medical Center in Durham, N.C., at Boston University School of Medicine, and at the University of Pennsylvania in Philadelphia showed that, in asymptomatic 50-year-old Asian Americans, Hispanic patients, and non-Hispanic Black patients, performing a single esophagogastroduodenoscopy (EGD) concomitantly with a colonoscopy, followed by screening EGDs if indicated (such as for a GIM diagnosis), is a cost-effective strategy. They found ongoing screening was not cost effective if the original results were normal.

In the new study published in Gastroenterology and Hepatology, the researchers followed up this finding with an attempt to tease out the cost-effectiveness of screening in different subgroups, as well as by sex. They built a Markov decision model focusing on the six most common Asian groups in the United States: Chinese, Filipino, Southeast Asian, Vietnamese, Korean, and Japanese Americans.

Model inputs were based on the published literature, and the outputs were compared with data from the Surveillance, Epidemiology, and End Results (SEER) data for disaggregated Asian Americans between 2001 and 2014 and separately with the California Cancer Registry (2011-2015). The model produced a good fit to the epidemiological data.

The model then compared cost-effectiveness of three hypothetical screening strategies in asymptomatic 50-year-old Asian Americans: one-time upper EGD with biopsies conducted at the time of colonoscopies for colorectal cancer screening, followed by EGDs every 3 years if GIM was detected (or other appropriate management of higher-grade pathology); EGD with biopsy at a colonoscopy for CRC screening followed by EGD biennially regardless of initial findings; and no endoscopy screening.

The one-time EGD strategy was the most cost-effective, regardless of sex, with an ICER of $75,959 per quality-adjusted life-year (QALY) in males and $74,329/QALY in females. The lowest ICER was found for Chinese Americans (males and females, $68,256/QALY), followed by Japanese Americans (males, $69,011/QALY; females, $73,748/QALY), and Korean Americans (males, $70,739/ QALY; females, $70,236/QALY). The highest ICERs were among Filipino American males and females, but the strategy was still cost-effective at the predetermined willingness-to-pay threshold of $100,000 ($83,732/QALY).

In all ethnic groups, the biennial screening strategy produced more harm than good and was costlier.

The authors believe that the strategy could be applied to other ethnic groups that come from countries with populations at higher relative risk of gastric cancer, such as Central and Latin American countries.

Asked to comment on the study, Mimi Tan, MD, an assistant professor of gastroenterology at Baylor College of Medicine in Houston, suggested that the estimates of precancerous lesions used in the Markov model were quite high because they were based on pathology databases. These sources tend to be biased toward symptomatic individuals since these are the patients typically referred for upper endoscopy biopsies. “Therefore, these probabilities may not represent true probability of these precancerous lesions among asymptomatic screening populations,” Dr. Tan said in an interview. She also questioned whether the study represented the true risk in female populations since the literature for women is sparse.

Dr. Tan suggested that a more cost-effective screening strategy might be one-time H. pylori immunoglobulin G testing in Asian Americans. The Houston Consensus Conference on Testing for H. pylori Infection already recommends testing for first-generation immigrants from high prevalence areas and Latino and African American racial or ethnic groups (Clin Gastroenterol Hepatol. 2018 Jul;16[7]:992-1002). “Future studies should compare cost-effectiveness of one-time upper endoscopy, which is more costly but able to detect premalignant lesions, to one-time H. pylori testing,” said Dr. Tan.

SOURCE: Shah SC et al. Clin Gastroenterol Hepatol. 2020 July 21. doi: 10.1016/j.cgh.2020.07.031.

A new model of gastric cancer screening suggests that, for Asian Americans, endoscopic screening alongside colonoscopy and follow-up surveillance of gastric preneoplasia is a cost-effective strategy. Incremental cost-effectiveness ratios (ICERs) were lowest for Chinese, Japanese, and Korean Americans. The model simulated results for asymptomatic 50-year-old subjects.

Gastric cancer risk is highest in Asian Pacific, Latin American, and Eastern European countries. Asia Pacific countries alone represent about half of all new cases. Helicobacter pylori–related gastritis is the strongest known risk factor for intestinal-type noncardia gastric adenocarcinoma (NCGA), which is the most common gastric cancer, and this chronic inflammation can lead to gastric intestinal metaplasia (GIM). Individuals with GIM have a 0.16% increased annual risk of NCGA, which makes them good candidates for endoscopic screening that could catch new cancers at an early stage.

In a previous study (Gastroenterology. 2018 May 17;155[3]:648-60), researchers at Vanderbilt University Medical Center in Durham, N.C., at Boston University School of Medicine, and at the University of Pennsylvania in Philadelphia showed that, in asymptomatic 50-year-old Asian Americans, Hispanic patients, and non-Hispanic Black patients, performing a single esophagogastroduodenoscopy (EGD) concomitantly with a colonoscopy, followed by screening EGDs if indicated (such as for a GIM diagnosis), is a cost-effective strategy. They found ongoing screening was not cost effective if the original results were normal.

In the new study published in Gastroenterology and Hepatology, the researchers followed up this finding with an attempt to tease out the cost-effectiveness of screening in different subgroups, as well as by sex. They built a Markov decision model focusing on the six most common Asian groups in the United States: Chinese, Filipino, Southeast Asian, Vietnamese, Korean, and Japanese Americans.

Model inputs were based on the published literature, and the outputs were compared with data from the Surveillance, Epidemiology, and End Results (SEER) data for disaggregated Asian Americans between 2001 and 2014 and separately with the California Cancer Registry (2011-2015). The model produced a good fit to the epidemiological data.

The model then compared cost-effectiveness of three hypothetical screening strategies in asymptomatic 50-year-old Asian Americans: one-time upper EGD with biopsies conducted at the time of colonoscopies for colorectal cancer screening, followed by EGDs every 3 years if GIM was detected (or other appropriate management of higher-grade pathology); EGD with biopsy at a colonoscopy for CRC screening followed by EGD biennially regardless of initial findings; and no endoscopy screening.

The one-time EGD strategy was the most cost-effective, regardless of sex, with an ICER of $75,959 per quality-adjusted life-year (QALY) in males and $74,329/QALY in females. The lowest ICER was found for Chinese Americans (males and females, $68,256/QALY), followed by Japanese Americans (males, $69,011/QALY; females, $73,748/QALY), and Korean Americans (males, $70,739/ QALY; females, $70,236/QALY). The highest ICERs were among Filipino American males and females, but the strategy was still cost-effective at the predetermined willingness-to-pay threshold of $100,000 ($83,732/QALY).

In all ethnic groups, the biennial screening strategy produced more harm than good and was costlier.

The authors believe that the strategy could be applied to other ethnic groups that come from countries with populations at higher relative risk of gastric cancer, such as Central and Latin American countries.

Asked to comment on the study, Mimi Tan, MD, an assistant professor of gastroenterology at Baylor College of Medicine in Houston, suggested that the estimates of precancerous lesions used in the Markov model were quite high because they were based on pathology databases. These sources tend to be biased toward symptomatic individuals since these are the patients typically referred for upper endoscopy biopsies. “Therefore, these probabilities may not represent true probability of these precancerous lesions among asymptomatic screening populations,” Dr. Tan said in an interview. She also questioned whether the study represented the true risk in female populations since the literature for women is sparse.

Dr. Tan suggested that a more cost-effective screening strategy might be one-time H. pylori immunoglobulin G testing in Asian Americans. The Houston Consensus Conference on Testing for H. pylori Infection already recommends testing for first-generation immigrants from high prevalence areas and Latino and African American racial or ethnic groups (Clin Gastroenterol Hepatol. 2018 Jul;16[7]:992-1002). “Future studies should compare cost-effectiveness of one-time upper endoscopy, which is more costly but able to detect premalignant lesions, to one-time H. pylori testing,” said Dr. Tan.

SOURCE: Shah SC et al. Clin Gastroenterol Hepatol. 2020 July 21. doi: 10.1016/j.cgh.2020.07.031.

A novel biomarker could help identify progression in Parkinson’s disease, distinguish it from other neurodegenerative disorders, and monitor response to treatments. Although the biomarker, neurofilament light chain (NfL), is not especially specific, it is the first blood-based biomarker for Parkinson’s disease.

Neurofilaments are components of the neural cytoskeleton, where they maintain structure along with other functions. Following axonal damage, NfL gets released into extracellular fluids. Previously, NfL has been detected in cerebrospinal fluid (CSF) in patients with multiple sclerosis and neurodegenerative dementias. NfL in the CSF can distinguish Parkinson’s disease (PD) from multiple system atrophy and progressive supranuclear palsy.

That’s useful, but a serum marker would open new doors. “An easily accessible biomarker that will serve as an indicator of diagnosis, disease state, and progression, as well as a marker of response to therapeutic intervention is needed. A biomarker will strengthen the ability to select patients for inclusion or stratification within clinical trials,” commented Okeanis Vaou, MD, director of the movement disorders program at St. Elizabeth’s Medical Center in Brighton, Mass. Dr. Vaou was not involved in the study, which was published Aug. 15 in Movement Disorders.
 

A potential biomarker?

To determine if serum NfL levels would correlate with CSF values and had potential as a biomarker, a large, multi-institutional team of researchers led by Brit Mollenhauer, MD, of the University Medical Center Goettingen (Germany), and Danielle Graham, MD, of Biogen, drew data from a prospective, longitudinal, single-center project called the De Novo Parkinson’s disease (DeNoPa) cohort.

The researchers analyzed data from 176 subjects, including drug-naive patients with newly diagnosed PD; age, sex, and education matched healthy controls; and patients who were initially diagnosed with Parkinson’s disease but had their diagnoses changed to a cognate or neurodegenerative disorder (OND). The researchers also drew 514 serum samples from the prospective longitudinal, observational, international multicenter study Parkinson’s Progression Marker Initiative (PPMI) cohort.

In the DeNoPa cohort, OND patients had the highest median CSF NfL levels at baseline (839 pg/mL) followed by PD patients (562 pg/mL) and healthy controls (494 pg/mL; P = .01). There was a strong correlation between CSF and serum NfL levels in a cross-sectional exploratory study with the PPMI cohort.

Age and sex covariates in the PPMI cohort explained 51% of NfL variability. After adjustment for age and sex, baseline median blood NfL levels were highest in the OND group (16.23 pg/mL), followed by the genetic PD group (13.36 pg/mL), prodromal participants (12.20 pg/mL), PD patients (11.73 pg/mL), unaffected mutation carriers (11.63 pg/mL), and healthy controls (11.05 pg/mL; F test P < .0001). Median serum NfL increased by 3.35% per year of age (P < .0001), and median serum NfL was 6.79% higher in women (P = .0002).

Doubling of adjusted serum NfL levels were associated with a median increase in the Movement Disorder Society Unified Parkinson’s Disease Rating Scale total score of 3.45 points (false-discovery rate–adjusted P = .0115), a median decrease in Symbol Digit Modality Test total score of 1.39 (FDR P = .026), a median decrease in Hopkins Verbal Learning Tests with discrimination recognition score of 0.3 (FDR P = .03), and a median decrease in Hopkins Verbal Learning Tests with retention score of 0.029 (FDR P = .04).
 

More specific markers needed

The findings are intriguing, said Dr Vaou, but “we need to acknowledge that increased NfL levels are not specific enough to Parkinson’s disease and reflect neuronal and axonal damage. Therefore, there is a need for more specific markers to support diagnostic accuracy, rate of progression, and ultimate prognosis. A serum NfL assay may be useful to clinicians evaluating patients with PD or OND diagnosis and mitigate the misdiagnosis of atypical PD. NfL may be particularly useful in differentiating PD from cognate disorders such as multiple system atrophy, progressive supranuclear palsy, and dementia with Lewy bodies.”

The current success is the result of large patient databases containing phenotypic data, imaging, and tests of tissue, blood, and cerebrospinal fluid, along with collaborations between advocacy groups, academia, and industry, according to Dr. Vaou. As that work continues, it could uncover more specific biomarkers “that will allow us not only to help with diagnosis and treatment but with disease progression, inclusion, recruitment and stratification in clinical studies, as well as (be an) indicator of response to therapeutic intervention of an investigational drug.”

The study was funded by the Michael J. Fox Foundation for Parkinson’s Research. Dr. Vaou had no relevant financial disclosures.

SOURCE: Mollenhauer B et al. Mov Disord. 2020 Aug 15. doi: 10.1002/mds.28206.

A novel biomarker could help identify progression in Parkinson’s disease, distinguish it from other neurodegenerative disorders, and monitor response to treatments. Although the biomarker, neurofilament light chain (NfL), is not especially specific, it is the first blood-based biomarker for Parkinson’s disease.

Neurofilaments are components of the neural cytoskeleton, where they maintain structure along with other functions. Following axonal damage, NfL gets released into extracellular fluids. Previously, NfL has been detected in cerebrospinal fluid (CSF) in patients with multiple sclerosis and neurodegenerative dementias. NfL in the CSF can distinguish Parkinson’s disease (PD) from multiple system atrophy and progressive supranuclear palsy.

That’s useful, but a serum marker would open new doors. “An easily accessible biomarker that will serve as an indicator of diagnosis, disease state, and progression, as well as a marker of response to therapeutic intervention is needed. A biomarker will strengthen the ability to select patients for inclusion or stratification within clinical trials,” commented Okeanis Vaou, MD, director of the movement disorders program at St. Elizabeth’s Medical Center in Brighton, Mass. Dr. Vaou was not involved in the study, which was published Aug. 15 in Movement Disorders.
 

A potential biomarker?

To determine if serum NfL levels would correlate with CSF values and had potential as a biomarker, a large, multi-institutional team of researchers led by Brit Mollenhauer, MD, of the University Medical Center Goettingen (Germany), and Danielle Graham, MD, of Biogen, drew data from a prospective, longitudinal, single-center project called the De Novo Parkinson’s disease (DeNoPa) cohort.

The researchers analyzed data from 176 subjects, including drug-naive patients with newly diagnosed PD; age, sex, and education matched healthy controls; and patients who were initially diagnosed with Parkinson’s disease but had their diagnoses changed to a cognate or neurodegenerative disorder (OND). The researchers also drew 514 serum samples from the prospective longitudinal, observational, international multicenter study Parkinson’s Progression Marker Initiative (PPMI) cohort.

In the DeNoPa cohort, OND patients had the highest median CSF NfL levels at baseline (839 pg/mL) followed by PD patients (562 pg/mL) and healthy controls (494 pg/mL; P = .01). There was a strong correlation between CSF and serum NfL levels in a cross-sectional exploratory study with the PPMI cohort.

Age and sex covariates in the PPMI cohort explained 51% of NfL variability. After adjustment for age and sex, baseline median blood NfL levels were highest in the OND group (16.23 pg/mL), followed by the genetic PD group (13.36 pg/mL), prodromal participants (12.20 pg/mL), PD patients (11.73 pg/mL), unaffected mutation carriers (11.63 pg/mL), and healthy controls (11.05 pg/mL; F test P < .0001). Median serum NfL increased by 3.35% per year of age (P < .0001), and median serum NfL was 6.79% higher in women (P = .0002).

Doubling of adjusted serum NfL levels were associated with a median increase in the Movement Disorder Society Unified Parkinson’s Disease Rating Scale total score of 3.45 points (false-discovery rate–adjusted P = .0115), a median decrease in Symbol Digit Modality Test total score of 1.39 (FDR P = .026), a median decrease in Hopkins Verbal Learning Tests with discrimination recognition score of 0.3 (FDR P = .03), and a median decrease in Hopkins Verbal Learning Tests with retention score of 0.029 (FDR P = .04).
 

More specific markers needed

The findings are intriguing, said Dr Vaou, but “we need to acknowledge that increased NfL levels are not specific enough to Parkinson’s disease and reflect neuronal and axonal damage. Therefore, there is a need for more specific markers to support diagnostic accuracy, rate of progression, and ultimate prognosis. A serum NfL assay may be useful to clinicians evaluating patients with PD or OND diagnosis and mitigate the misdiagnosis of atypical PD. NfL may be particularly useful in differentiating PD from cognate disorders such as multiple system atrophy, progressive supranuclear palsy, and dementia with Lewy bodies.”

The current success is the result of large patient databases containing phenotypic data, imaging, and tests of tissue, blood, and cerebrospinal fluid, along with collaborations between advocacy groups, academia, and industry, according to Dr. Vaou. As that work continues, it could uncover more specific biomarkers “that will allow us not only to help with diagnosis and treatment but with disease progression, inclusion, recruitment and stratification in clinical studies, as well as (be an) indicator of response to therapeutic intervention of an investigational drug.”

The study was funded by the Michael J. Fox Foundation for Parkinson’s Research. Dr. Vaou had no relevant financial disclosures.

SOURCE: Mollenhauer B et al. Mov Disord. 2020 Aug 15. doi: 10.1002/mds.28206.

A novel biomarker could help identify progression in Parkinson’s disease, distinguish it from other neurodegenerative disorders, and monitor response to treatments. Although the biomarker, neurofilament light chain (NfL), is not especially specific, it is the first blood-based biomarker for Parkinson’s disease.

Neurofilaments are components of the neural cytoskeleton, where they maintain structure along with other functions. Following axonal damage, NfL gets released into extracellular fluids. Previously, NfL has been detected in cerebrospinal fluid (CSF) in patients with multiple sclerosis and neurodegenerative dementias. NfL in the CSF can distinguish Parkinson’s disease (PD) from multiple system atrophy and progressive supranuclear palsy.

That’s useful, but a serum marker would open new doors. “An easily accessible biomarker that will serve as an indicator of diagnosis, disease state, and progression, as well as a marker of response to therapeutic intervention is needed. A biomarker will strengthen the ability to select patients for inclusion or stratification within clinical trials,” commented Okeanis Vaou, MD, director of the movement disorders program at St. Elizabeth’s Medical Center in Brighton, Mass. Dr. Vaou was not involved in the study, which was published Aug. 15 in Movement Disorders.
 

A potential biomarker?

To determine if serum NfL levels would correlate with CSF values and had potential as a biomarker, a large, multi-institutional team of researchers led by Brit Mollenhauer, MD, of the University Medical Center Goettingen (Germany), and Danielle Graham, MD, of Biogen, drew data from a prospective, longitudinal, single-center project called the De Novo Parkinson’s disease (DeNoPa) cohort.

The researchers analyzed data from 176 subjects, including drug-naive patients with newly diagnosed PD; age, sex, and education matched healthy controls; and patients who were initially diagnosed with Parkinson’s disease but had their diagnoses changed to a cognate or neurodegenerative disorder (OND). The researchers also drew 514 serum samples from the prospective longitudinal, observational, international multicenter study Parkinson’s Progression Marker Initiative (PPMI) cohort.

In the DeNoPa cohort, OND patients had the highest median CSF NfL levels at baseline (839 pg/mL) followed by PD patients (562 pg/mL) and healthy controls (494 pg/mL; P = .01). There was a strong correlation between CSF and serum NfL levels in a cross-sectional exploratory study with the PPMI cohort.

Age and sex covariates in the PPMI cohort explained 51% of NfL variability. After adjustment for age and sex, baseline median blood NfL levels were highest in the OND group (16.23 pg/mL), followed by the genetic PD group (13.36 pg/mL), prodromal participants (12.20 pg/mL), PD patients (11.73 pg/mL), unaffected mutation carriers (11.63 pg/mL), and healthy controls (11.05 pg/mL; F test P < .0001). Median serum NfL increased by 3.35% per year of age (P < .0001), and median serum NfL was 6.79% higher in women (P = .0002).

Doubling of adjusted serum NfL levels were associated with a median increase in the Movement Disorder Society Unified Parkinson’s Disease Rating Scale total score of 3.45 points (false-discovery rate–adjusted P = .0115), a median decrease in Symbol Digit Modality Test total score of 1.39 (FDR P = .026), a median decrease in Hopkins Verbal Learning Tests with discrimination recognition score of 0.3 (FDR P = .03), and a median decrease in Hopkins Verbal Learning Tests with retention score of 0.029 (FDR P = .04).
 

More specific markers needed

The findings are intriguing, said Dr Vaou, but “we need to acknowledge that increased NfL levels are not specific enough to Parkinson’s disease and reflect neuronal and axonal damage. Therefore, there is a need for more specific markers to support diagnostic accuracy, rate of progression, and ultimate prognosis. A serum NfL assay may be useful to clinicians evaluating patients with PD or OND diagnosis and mitigate the misdiagnosis of atypical PD. NfL may be particularly useful in differentiating PD from cognate disorders such as multiple system atrophy, progressive supranuclear palsy, and dementia with Lewy bodies.”

The current success is the result of large patient databases containing phenotypic data, imaging, and tests of tissue, blood, and cerebrospinal fluid, along with collaborations between advocacy groups, academia, and industry, according to Dr. Vaou. As that work continues, it could uncover more specific biomarkers “that will allow us not only to help with diagnosis and treatment but with disease progression, inclusion, recruitment and stratification in clinical studies, as well as (be an) indicator of response to therapeutic intervention of an investigational drug.”

The study was funded by the Michael J. Fox Foundation for Parkinson’s Research. Dr. Vaou had no relevant financial disclosures.

SOURCE: Mollenhauer B et al. Mov Disord. 2020 Aug 15. doi: 10.1002/mds.28206.

The human growth hormone formulation somapacitan for adults with growth hormone deficiency was approved by the Food and Drug Administration on Sept. 1. The drug is injected once a week, while other FDA-approved human growth hormone formulations require daily jabs.

Somapacitan contains an albumin-binding element attached to the growth hormone, causing the reversible binding to albumin proteins in the body. This reduces clearance and increases the half-life of the hormone. The formulation has previous demonstrated safety and efficacy in children with growth hormone deficiency (J Clin Endocrinol Metab. 2020 Apr 1. doi: 10.1210/clinem/dgz310).

Growth hormone treatment can counter abdominal obesity, reduced lean body mass, fatigue, osteopenia, cardiovascular risks, and other manifestations of growth hormone deficiency in adults, but daily injections can be burdensome for patients. That makes long-acting versions attractive, but the lifelong nature of the treatment makes it important to characterize safety and tolerability.

The approval comes on the strength of a randomized, placebo-controlled phase 3 trial (REAL 1) of 300 adult patients in 17 countries with growth hormone deficiency (J Clin Endocrinol Metab. 2020 Apr 1. doi: 10.1210/clinem/dgaa049). Participants had either never received growth hormone treatment, or had stopped taking one at least 6 months before starting the trial. Subjects received once-weekly somapacitan, once-weekly placebo, or daily somatropin, which is FDA approved.

The primary endpoint was percentage change of truncal fat, which is regulated by growth hormone, and can lead to medical problems. After 34 weeks, subjects in the somapacitan group experienced a 1.06% decrease in truncal fat, compared with a 0.47% increase in the placebo group (P = .009) and a 2.23% decrease in the daily somatropin group.

After 34 weeks, a 52-week extension trial began. The somapacitan group continued on the drug and the placebo group was offered somapacitan. Patients on daily somatropin were randomized to continue daily treatment with somatropin or to switch to somapacitan.

At the end of the extension trial, those taking somapacitan for the full 86-week duration had an average reduction of 1.52% in truncal fat. After 86 weeks, the somapacitan and daily somatropin groups had similar values for percentage change in visceral fat, lean body mass, or appendicular skeletal muscle mass.

Common side effects of somapacitan were back pain, joint paint, indigestion, a sleep disorder, dizziness, tonsillitis, swelling in the arms or lower legs, vomiting, adrenal insufficiency, hypertension, increase in blood creatine phosphokinase, weight increase, and anemia.

Somapacitan, marketed as Sogroya by Novo Nordisk, is contraindicated in patients with an allergy to the drug, as well as those with an active malignancy, diabetic eye disease where increases in blood sugars could lead to retinal damage, acute critical illness, or acute respiratory failure.

The FDA recommends that providers perform an eye examination before drug initiation, as well as periodically while the patient is taking the drug, to rule out preexisting papilledema. This could be a sign of intracranial hypertension, which could be caused or worsened by growth hormones.

The human growth hormone formulation somapacitan for adults with growth hormone deficiency was approved by the Food and Drug Administration on Sept. 1. The drug is injected once a week, while other FDA-approved human growth hormone formulations require daily jabs.

Somapacitan contains an albumin-binding element attached to the growth hormone, causing the reversible binding to albumin proteins in the body. This reduces clearance and increases the half-life of the hormone. The formulation has previous demonstrated safety and efficacy in children with growth hormone deficiency (J Clin Endocrinol Metab. 2020 Apr 1. doi: 10.1210/clinem/dgz310).

Growth hormone treatment can counter abdominal obesity, reduced lean body mass, fatigue, osteopenia, cardiovascular risks, and other manifestations of growth hormone deficiency in adults, but daily injections can be burdensome for patients. That makes long-acting versions attractive, but the lifelong nature of the treatment makes it important to characterize safety and tolerability.

The approval comes on the strength of a randomized, placebo-controlled phase 3 trial (REAL 1) of 300 adult patients in 17 countries with growth hormone deficiency (J Clin Endocrinol Metab. 2020 Apr 1. doi: 10.1210/clinem/dgaa049). Participants had either never received growth hormone treatment, or had stopped taking one at least 6 months before starting the trial. Subjects received once-weekly somapacitan, once-weekly placebo, or daily somatropin, which is FDA approved.

The primary endpoint was percentage change of truncal fat, which is regulated by growth hormone, and can lead to medical problems. After 34 weeks, subjects in the somapacitan group experienced a 1.06% decrease in truncal fat, compared with a 0.47% increase in the placebo group (P = .009) and a 2.23% decrease in the daily somatropin group.

After 34 weeks, a 52-week extension trial began. The somapacitan group continued on the drug and the placebo group was offered somapacitan. Patients on daily somatropin were randomized to continue daily treatment with somatropin or to switch to somapacitan.

At the end of the extension trial, those taking somapacitan for the full 86-week duration had an average reduction of 1.52% in truncal fat. After 86 weeks, the somapacitan and daily somatropin groups had similar values for percentage change in visceral fat, lean body mass, or appendicular skeletal muscle mass.

Common side effects of somapacitan were back pain, joint paint, indigestion, a sleep disorder, dizziness, tonsillitis, swelling in the arms or lower legs, vomiting, adrenal insufficiency, hypertension, increase in blood creatine phosphokinase, weight increase, and anemia.

Somapacitan, marketed as Sogroya by Novo Nordisk, is contraindicated in patients with an allergy to the drug, as well as those with an active malignancy, diabetic eye disease where increases in blood sugars could lead to retinal damage, acute critical illness, or acute respiratory failure.

The FDA recommends that providers perform an eye examination before drug initiation, as well as periodically while the patient is taking the drug, to rule out preexisting papilledema. This could be a sign of intracranial hypertension, which could be caused or worsened by growth hormones.

The human growth hormone formulation somapacitan for adults with growth hormone deficiency was approved by the Food and Drug Administration on Sept. 1. The drug is injected once a week, while other FDA-approved human growth hormone formulations require daily jabs.

Somapacitan contains an albumin-binding element attached to the growth hormone, causing the reversible binding to albumin proteins in the body. This reduces clearance and increases the half-life of the hormone. The formulation has previous demonstrated safety and efficacy in children with growth hormone deficiency (J Clin Endocrinol Metab. 2020 Apr 1. doi: 10.1210/clinem/dgz310).

Growth hormone treatment can counter abdominal obesity, reduced lean body mass, fatigue, osteopenia, cardiovascular risks, and other manifestations of growth hormone deficiency in adults, but daily injections can be burdensome for patients. That makes long-acting versions attractive, but the lifelong nature of the treatment makes it important to characterize safety and tolerability.

The approval comes on the strength of a randomized, placebo-controlled phase 3 trial (REAL 1) of 300 adult patients in 17 countries with growth hormone deficiency (J Clin Endocrinol Metab. 2020 Apr 1. doi: 10.1210/clinem/dgaa049). Participants had either never received growth hormone treatment, or had stopped taking one at least 6 months before starting the trial. Subjects received once-weekly somapacitan, once-weekly placebo, or daily somatropin, which is FDA approved.

The primary endpoint was percentage change of truncal fat, which is regulated by growth hormone, and can lead to medical problems. After 34 weeks, subjects in the somapacitan group experienced a 1.06% decrease in truncal fat, compared with a 0.47% increase in the placebo group (P = .009) and a 2.23% decrease in the daily somatropin group.

After 34 weeks, a 52-week extension trial began. The somapacitan group continued on the drug and the placebo group was offered somapacitan. Patients on daily somatropin were randomized to continue daily treatment with somatropin or to switch to somapacitan.

At the end of the extension trial, those taking somapacitan for the full 86-week duration had an average reduction of 1.52% in truncal fat. After 86 weeks, the somapacitan and daily somatropin groups had similar values for percentage change in visceral fat, lean body mass, or appendicular skeletal muscle mass.

Common side effects of somapacitan were back pain, joint paint, indigestion, a sleep disorder, dizziness, tonsillitis, swelling in the arms or lower legs, vomiting, adrenal insufficiency, hypertension, increase in blood creatine phosphokinase, weight increase, and anemia.

Somapacitan, marketed as Sogroya by Novo Nordisk, is contraindicated in patients with an allergy to the drug, as well as those with an active malignancy, diabetic eye disease where increases in blood sugars could lead to retinal damage, acute critical illness, or acute respiratory failure.

The FDA recommends that providers perform an eye examination before drug initiation, as well as periodically while the patient is taking the drug, to rule out preexisting papilledema. This could be a sign of intracranial hypertension, which could be caused or worsened by growth hormones.

A new retrospective analysis has found 1.5-2 cm to be the optimal length of a temporal artery biopsy for detecting giant cell arteritis. Longer lengths did not yield enough improvement in diagnosis to justify the increased risk of complications. The length calculation accounts for post-fixation shrinkage.

The study, published Aug. 20 in Lancet Rheumatology, represents an “important contribution” to help with the diagnosis of giant cell arteritis when a decision has been made to perform a temporal artery biopsy, according to authors of an editorial accompanying the study.

Giant cell arteritis is an inflammatory condition of medium and large arteries, usually affecting the aorta and proximal aorta. Diagnosis includes a combination of clinical presentation and imaging or histology via a temporal artery biopsy, but the optimal tissue length for a biopsy has not been established. Longer lengths were initially considered best because inflammation can be non-uniform, and a shorter length could therefore raise the risk of a false negative if it contained few signs of inflammation.

Studies in the 1990s and early 2000s concluded that biopsies 2-5 cm in length were optimal. But later studies determined that a minimum of just 0.5 cm was necessary. The European League Against Rheumatism updated its recommendations in 2018 and the British Society for Rheumatology followed suit in 2020, both with a suggested minimum length of 1.0 cm. Despite these guidances, the optimal biopsy length beyond 1 cm remains unknown.

For the study, first author Raymond Chu, MD, of the University of Alberta Hospital, Edmonton, reviewed electronic medical records of all patients who underwent temporal artery biopsies in Alberta between Jan. 1, 2008, and Jan. 1, 2018. A single pathologist reviewed all positive findings to ensure uniformity of pathological interpretation. When the reviewer disagreed with the initial diagnosis, researchers removed the result from the analysis.

The study included 1,203 biopsies from 1,176 patients at 22 institutions. A total of 13 positive biopsies were removed following pathologist review. The median biopsy length was 1.3 cm. Median erythrocyte sedimentation rate (ESR) was 41 mm/hour, and median C-reactive protein (CRP) level was 14.7 mg/L. Univariate analyses found associations between positive biopsy and increased age (75.3 vs. 71.3 years; P < .0001), increased ESR (57 vs. 36 mm/hour; P < .0001), lower CRP (12.1 vs. 41.8 mg/L; P < .0001), and longer biopsy length (1.6 vs. 1.2 cm; P = .0025).

In a multivariate analysis, the only variables associated with a positive biopsy were age (adjusted odds ratio [aOR], 1.04; P = .0001), lower CRP levels (aOR, 1.01; P = .0006), and biopsy length (aOR, 1.22; P = .047). The researchers then stratified the sample by biopsy length, using categories of < 0.5 cm, 0.5-1.0 cm, 1.0-1.5 cm, 1.5-2.0 cm, 2.0-2.5 cm, and ≥ 2.5 cm. They identified the two top change points according to the Akaike information criterion as 1.5 cm and 2.0 cm, but only 1.5 cm was statistically significant (≥ 1.5 versus < 1.5; OR, 1.57; P = .011).

Accounting for an average 8% contraction following excision, the researchers recommend an optimal pre-fixation biopsy length of 1.5-2.0 cm.

Some previous studies had suggested no association between increased sample length and false negatives, but they were based on small sample sizes. The current study is limited by its retrospective design and lack of treatment data. The lack of marked inflammation in the sample population suggests that patients were frequently treated empirically with glucocorticoids, and this could have increased the frequency of false negative biopsies, the researchers said.

In the accompanying editorial, Frank Buttgereit, MD, of Charité University Medicine in Berlin and Christian Dejaco, MD, PhD, of the Medical University of Graz (Austria) point out that ultrasound is now often used for the diagnosis of giant cell arteritis, following clinical examination and laboratory testing. When it has been determined that biopsy is necessary, they said that it is imperative that the harvest be carried out by an experienced physician, and the new study provides a useful contribution through its clear recommendation for biopsy length.

The authors of the editorial also point out the importance of experienced pathologists, but interpretation is subject to inter- and intraobserver variability, as shown in a previous study that found that ultrasound and histology have similar reliability.

The study received no funding. Several authors reported receiving personal fees from Hoffmann-LaRoche and serving as site primary investigators for industry-sponsored vasculitis trials.

SOURCE: Chu R et al. Lancet Rheumatol. 2020 Aug 20. doi: 10.1016/S2665-9913(20)30222-8.

A new retrospective analysis has found 1.5-2 cm to be the optimal length of a temporal artery biopsy for detecting giant cell arteritis. Longer lengths did not yield enough improvement in diagnosis to justify the increased risk of complications. The length calculation accounts for post-fixation shrinkage.

The study, published Aug. 20 in Lancet Rheumatology, represents an “important contribution” to help with the diagnosis of giant cell arteritis when a decision has been made to perform a temporal artery biopsy, according to authors of an editorial accompanying the study.

Giant cell arteritis is an inflammatory condition of medium and large arteries, usually affecting the aorta and proximal aorta. Diagnosis includes a combination of clinical presentation and imaging or histology via a temporal artery biopsy, but the optimal tissue length for a biopsy has not been established. Longer lengths were initially considered best because inflammation can be non-uniform, and a shorter length could therefore raise the risk of a false negative if it contained few signs of inflammation.

Studies in the 1990s and early 2000s concluded that biopsies 2-5 cm in length were optimal. But later studies determined that a minimum of just 0.5 cm was necessary. The European League Against Rheumatism updated its recommendations in 2018 and the British Society for Rheumatology followed suit in 2020, both with a suggested minimum length of 1.0 cm. Despite these guidances, the optimal biopsy length beyond 1 cm remains unknown.

For the study, first author Raymond Chu, MD, of the University of Alberta Hospital, Edmonton, reviewed electronic medical records of all patients who underwent temporal artery biopsies in Alberta between Jan. 1, 2008, and Jan. 1, 2018. A single pathologist reviewed all positive findings to ensure uniformity of pathological interpretation. When the reviewer disagreed with the initial diagnosis, researchers removed the result from the analysis.

The study included 1,203 biopsies from 1,176 patients at 22 institutions. A total of 13 positive biopsies were removed following pathologist review. The median biopsy length was 1.3 cm. Median erythrocyte sedimentation rate (ESR) was 41 mm/hour, and median C-reactive protein (CRP) level was 14.7 mg/L. Univariate analyses found associations between positive biopsy and increased age (75.3 vs. 71.3 years; P < .0001), increased ESR (57 vs. 36 mm/hour; P < .0001), lower CRP (12.1 vs. 41.8 mg/L; P < .0001), and longer biopsy length (1.6 vs. 1.2 cm; P = .0025).

In a multivariate analysis, the only variables associated with a positive biopsy were age (adjusted odds ratio [aOR], 1.04; P = .0001), lower CRP levels (aOR, 1.01; P = .0006), and biopsy length (aOR, 1.22; P = .047). The researchers then stratified the sample by biopsy length, using categories of < 0.5 cm, 0.5-1.0 cm, 1.0-1.5 cm, 1.5-2.0 cm, 2.0-2.5 cm, and ≥ 2.5 cm. They identified the two top change points according to the Akaike information criterion as 1.5 cm and 2.0 cm, but only 1.5 cm was statistically significant (≥ 1.5 versus < 1.5; OR, 1.57; P = .011).

Accounting for an average 8% contraction following excision, the researchers recommend an optimal pre-fixation biopsy length of 1.5-2.0 cm.

Some previous studies had suggested no association between increased sample length and false negatives, but they were based on small sample sizes. The current study is limited by its retrospective design and lack of treatment data. The lack of marked inflammation in the sample population suggests that patients were frequently treated empirically with glucocorticoids, and this could have increased the frequency of false negative biopsies, the researchers said.

In the accompanying editorial, Frank Buttgereit, MD, of Charité University Medicine in Berlin and Christian Dejaco, MD, PhD, of the Medical University of Graz (Austria) point out that ultrasound is now often used for the diagnosis of giant cell arteritis, following clinical examination and laboratory testing. When it has been determined that biopsy is necessary, they said that it is imperative that the harvest be carried out by an experienced physician, and the new study provides a useful contribution through its clear recommendation for biopsy length.

The authors of the editorial also point out the importance of experienced pathologists, but interpretation is subject to inter- and intraobserver variability, as shown in a previous study that found that ultrasound and histology have similar reliability.

The study received no funding. Several authors reported receiving personal fees from Hoffmann-LaRoche and serving as site primary investigators for industry-sponsored vasculitis trials.

SOURCE: Chu R et al. Lancet Rheumatol. 2020 Aug 20. doi: 10.1016/S2665-9913(20)30222-8.

A new retrospective analysis has found 1.5-2 cm to be the optimal length of a temporal artery biopsy for detecting giant cell arteritis. Longer lengths did not yield enough improvement in diagnosis to justify the increased risk of complications. The length calculation accounts for post-fixation shrinkage.

The study, published Aug. 20 in Lancet Rheumatology, represents an “important contribution” to help with the diagnosis of giant cell arteritis when a decision has been made to perform a temporal artery biopsy, according to authors of an editorial accompanying the study.

Giant cell arteritis is an inflammatory condition of medium and large arteries, usually affecting the aorta and proximal aorta. Diagnosis includes a combination of clinical presentation and imaging or histology via a temporal artery biopsy, but the optimal tissue length for a biopsy has not been established. Longer lengths were initially considered best because inflammation can be non-uniform, and a shorter length could therefore raise the risk of a false negative if it contained few signs of inflammation.

Studies in the 1990s and early 2000s concluded that biopsies 2-5 cm in length were optimal. But later studies determined that a minimum of just 0.5 cm was necessary. The European League Against Rheumatism updated its recommendations in 2018 and the British Society for Rheumatology followed suit in 2020, both with a suggested minimum length of 1.0 cm. Despite these guidances, the optimal biopsy length beyond 1 cm remains unknown.

For the study, first author Raymond Chu, MD, of the University of Alberta Hospital, Edmonton, reviewed electronic medical records of all patients who underwent temporal artery biopsies in Alberta between Jan. 1, 2008, and Jan. 1, 2018. A single pathologist reviewed all positive findings to ensure uniformity of pathological interpretation. When the reviewer disagreed with the initial diagnosis, researchers removed the result from the analysis.

The study included 1,203 biopsies from 1,176 patients at 22 institutions. A total of 13 positive biopsies were removed following pathologist review. The median biopsy length was 1.3 cm. Median erythrocyte sedimentation rate (ESR) was 41 mm/hour, and median C-reactive protein (CRP) level was 14.7 mg/L. Univariate analyses found associations between positive biopsy and increased age (75.3 vs. 71.3 years; P < .0001), increased ESR (57 vs. 36 mm/hour; P < .0001), lower CRP (12.1 vs. 41.8 mg/L; P < .0001), and longer biopsy length (1.6 vs. 1.2 cm; P = .0025).

In a multivariate analysis, the only variables associated with a positive biopsy were age (adjusted odds ratio [aOR], 1.04; P = .0001), lower CRP levels (aOR, 1.01; P = .0006), and biopsy length (aOR, 1.22; P = .047). The researchers then stratified the sample by biopsy length, using categories of < 0.5 cm, 0.5-1.0 cm, 1.0-1.5 cm, 1.5-2.0 cm, 2.0-2.5 cm, and ≥ 2.5 cm. They identified the two top change points according to the Akaike information criterion as 1.5 cm and 2.0 cm, but only 1.5 cm was statistically significant (≥ 1.5 versus < 1.5; OR, 1.57; P = .011).

Accounting for an average 8% contraction following excision, the researchers recommend an optimal pre-fixation biopsy length of 1.5-2.0 cm.

Some previous studies had suggested no association between increased sample length and false negatives, but they were based on small sample sizes. The current study is limited by its retrospective design and lack of treatment data. The lack of marked inflammation in the sample population suggests that patients were frequently treated empirically with glucocorticoids, and this could have increased the frequency of false negative biopsies, the researchers said.

In the accompanying editorial, Frank Buttgereit, MD, of Charité University Medicine in Berlin and Christian Dejaco, MD, PhD, of the Medical University of Graz (Austria) point out that ultrasound is now often used for the diagnosis of giant cell arteritis, following clinical examination and laboratory testing. When it has been determined that biopsy is necessary, they said that it is imperative that the harvest be carried out by an experienced physician, and the new study provides a useful contribution through its clear recommendation for biopsy length.

The authors of the editorial also point out the importance of experienced pathologists, but interpretation is subject to inter- and intraobserver variability, as shown in a previous study that found that ultrasound and histology have similar reliability.

The study received no funding. Several authors reported receiving personal fees from Hoffmann-LaRoche and serving as site primary investigators for industry-sponsored vasculitis trials.

SOURCE: Chu R et al. Lancet Rheumatol. 2020 Aug 20. doi: 10.1016/S2665-9913(20)30222-8.

Among migraine sufferers, levels of soluble vascular cell adhesion molecule 1 (sVCAM1) in cerebrospinal fluid (CSF) are higher in those who experience more frequent attacks, according to a new study. The molecule could be a novel biomarker for the study of the mechanisms that underlie migraine. The work also suggests that the barrier between blood and CSF, sometimes described as leaky, is in fact selectively permeable.

The findings complement recent PET and dynamic contrast-enhanced MRI studies that have shown no sign of damage to the blood brain barrier (BBB) in migraine. Instead, there may be heightened transport of some molecules from blood to the CSF, evidenced by greater increases in fibrinogen levels in CSF than albumin. sVCAM1 might influence BBB or blood-CSF barrier permeability, possibly as a protective measure against fibrinogen, according to Michael Harrington, MD, scientific director of neuroscience at the Huntington Medical Research Institutes, Pasadena, Calif., who presented the findings in a poster at the virtual annual meeting of the American Headache Society.
 

BBB disruption?

The BBB is a well-known structure that regulates what molecules enter the brain, but the blood-CSF barrier, while lesser known, is also important. It comprises choroid plexus epithelial cells that oversee selective exchange of waste products, ions, and nutrients. Acute inflammation or chronic effects from conditions like stroke, multiple sclerosis, and Alzheimer’s disease can alter the function of this barrier.

No other capillary biomarkers were different between controls and patients with migraine – only sVCAM1. “My data supports a highly selective transport change from blood to CSF, which I propose is less likely to come from brain capillaries than choroid plexuses, especially since choroid plexuses produce the bulk of the CSF. It’s a work in progress, but based on this likelihood of choroid plexus involvement, I am accumulating more data that support the choroid plexuses as the primary source of change in migraine,” said Dr. Harrington in an interview.

“The most important finding of the study is that the blood brain barrier is not compromised in people with migraine,” said Rami Burstein, PhD, professor of neuroscience at Harvard Medical School, Boston, who was asked to comment on the findings. “Most unwanted adverse events are caused by drug action inside the brain, and thus, peripherally acting drugs become more favorable as they usually have fewer side effects. Given that the headache aspect of migraine could be intercepted outside the brain, the fact that the BBB is not compromised is a very good news,” Dr. Burstein added.

Dr. Harrington’s team recruited 74 subjects: 14 nonmigraine controls, 16 who were experiencing migraine illness (ictal), 27 not experiencing migraine illness (interictal), and 17 with chronic migraine. The CSF/serum quotient for albumen was higher in the 60 migraineurs than in the 14 controls (5.6 g/L vs. 4.1 g/L; P = .04), as was the CSF/serum quotient for fibrinogen (161.5 g/L vs. 86.1 g/L; P = .007). CSF levels of plasminogen were also higher in patients with migraine (240.7 ng/mL vs. 186.2 ng/mL; P = .03).

When the researchers compared ictal to interictal subjects, they found no difference in fibrinogen or albumen. That suggested that these values are generally increased in migraine patients compared with controls, rather than spiking during attacks. They also divided subjects by annual frequency, including groups experiencing fewer than 24 migraines per year, 24-180 attacks per year, and more than 180 attacks per year. The quotient for fibrinogen increased in migraineurs in general, compared with controls, but then decreased as the frequency of migraine went up (198.6 g/L, 167.0 g/L, and 121.6 g/L, respectively; P = .004).

CSF levels of sVCAM1 were 4.7 ng/mL in controls, 4.5 in the group with fewer than 24 migraines per year, 5.5 in the 24-180 group, and 7.1 in the group with more than 180 (P = .004).
 

Implications for therapy

The research, though at a very early stage, could have implications for therapies. Most drugs that treat migraine remain something of a mystery because researchers don’t know for sure where they act. In the brain? Systemically? The question of permeability of various molecules through both barriers could lend insight into what’s happening. “That’s why there is interest in barrier transport, and we’re showing there is a selective change of transport in migraineurs,” said Dr. Harrington.

As for more general therapeutic implications, “I can only speculate, but clearly there is baseline altered transport, probably in the choroid plexuses of these people,” said Dr. Harrington. He added that in time researchers might test drugs to see if they alter sVCAM1 levels or even develop novel drug candidates to act directly on it.

But he also sounded a note of caution because of the exploratory nature of the study. “These are all really early speculations.”

The study was funded by NIH, the Sunstar Foundation, Wyngs Foundation, and the Higgins Family. Dr. Harrington has no relevant disclosures.

SOURCE: Harrington M et al. AHS 2020, Abstract 842752.

Among migraine sufferers, levels of soluble vascular cell adhesion molecule 1 (sVCAM1) in cerebrospinal fluid (CSF) are higher in those who experience more frequent attacks, according to a new study. The molecule could be a novel biomarker for the study of the mechanisms that underlie migraine. The work also suggests that the barrier between blood and CSF, sometimes described as leaky, is in fact selectively permeable.

The findings complement recent PET and dynamic contrast-enhanced MRI studies that have shown no sign of damage to the blood brain barrier (BBB) in migraine. Instead, there may be heightened transport of some molecules from blood to the CSF, evidenced by greater increases in fibrinogen levels in CSF than albumin. sVCAM1 might influence BBB or blood-CSF barrier permeability, possibly as a protective measure against fibrinogen, according to Michael Harrington, MD, scientific director of neuroscience at the Huntington Medical Research Institutes, Pasadena, Calif., who presented the findings in a poster at the virtual annual meeting of the American Headache Society.
 

BBB disruption?

The BBB is a well-known structure that regulates what molecules enter the brain, but the blood-CSF barrier, while lesser known, is also important. It comprises choroid plexus epithelial cells that oversee selective exchange of waste products, ions, and nutrients. Acute inflammation or chronic effects from conditions like stroke, multiple sclerosis, and Alzheimer’s disease can alter the function of this barrier.

No other capillary biomarkers were different between controls and patients with migraine – only sVCAM1. “My data supports a highly selective transport change from blood to CSF, which I propose is less likely to come from brain capillaries than choroid plexuses, especially since choroid plexuses produce the bulk of the CSF. It’s a work in progress, but based on this likelihood of choroid plexus involvement, I am accumulating more data that support the choroid plexuses as the primary source of change in migraine,” said Dr. Harrington in an interview.

“The most important finding of the study is that the blood brain barrier is not compromised in people with migraine,” said Rami Burstein, PhD, professor of neuroscience at Harvard Medical School, Boston, who was asked to comment on the findings. “Most unwanted adverse events are caused by drug action inside the brain, and thus, peripherally acting drugs become more favorable as they usually have fewer side effects. Given that the headache aspect of migraine could be intercepted outside the brain, the fact that the BBB is not compromised is a very good news,” Dr. Burstein added.

Dr. Harrington’s team recruited 74 subjects: 14 nonmigraine controls, 16 who were experiencing migraine illness (ictal), 27 not experiencing migraine illness (interictal), and 17 with chronic migraine. The CSF/serum quotient for albumen was higher in the 60 migraineurs than in the 14 controls (5.6 g/L vs. 4.1 g/L; P = .04), as was the CSF/serum quotient for fibrinogen (161.5 g/L vs. 86.1 g/L; P = .007). CSF levels of plasminogen were also higher in patients with migraine (240.7 ng/mL vs. 186.2 ng/mL; P = .03).

When the researchers compared ictal to interictal subjects, they found no difference in fibrinogen or albumen. That suggested that these values are generally increased in migraine patients compared with controls, rather than spiking during attacks. They also divided subjects by annual frequency, including groups experiencing fewer than 24 migraines per year, 24-180 attacks per year, and more than 180 attacks per year. The quotient for fibrinogen increased in migraineurs in general, compared with controls, but then decreased as the frequency of migraine went up (198.6 g/L, 167.0 g/L, and 121.6 g/L, respectively; P = .004).

CSF levels of sVCAM1 were 4.7 ng/mL in controls, 4.5 in the group with fewer than 24 migraines per year, 5.5 in the 24-180 group, and 7.1 in the group with more than 180 (P = .004).
 

Implications for therapy

The research, though at a very early stage, could have implications for therapies. Most drugs that treat migraine remain something of a mystery because researchers don’t know for sure where they act. In the brain? Systemically? The question of permeability of various molecules through both barriers could lend insight into what’s happening. “That’s why there is interest in barrier transport, and we’re showing there is a selective change of transport in migraineurs,” said Dr. Harrington.

As for more general therapeutic implications, “I can only speculate, but clearly there is baseline altered transport, probably in the choroid plexuses of these people,” said Dr. Harrington. He added that in time researchers might test drugs to see if they alter sVCAM1 levels or even develop novel drug candidates to act directly on it.

But he also sounded a note of caution because of the exploratory nature of the study. “These are all really early speculations.”

The study was funded by NIH, the Sunstar Foundation, Wyngs Foundation, and the Higgins Family. Dr. Harrington has no relevant disclosures.

SOURCE: Harrington M et al. AHS 2020, Abstract 842752.

Among migraine sufferers, levels of soluble vascular cell adhesion molecule 1 (sVCAM1) in cerebrospinal fluid (CSF) are higher in those who experience more frequent attacks, according to a new study. The molecule could be a novel biomarker for the study of the mechanisms that underlie migraine. The work also suggests that the barrier between blood and CSF, sometimes described as leaky, is in fact selectively permeable.

The findings complement recent PET and dynamic contrast-enhanced MRI studies that have shown no sign of damage to the blood brain barrier (BBB) in migraine. Instead, there may be heightened transport of some molecules from blood to the CSF, evidenced by greater increases in fibrinogen levels in CSF than albumin. sVCAM1 might influence BBB or blood-CSF barrier permeability, possibly as a protective measure against fibrinogen, according to Michael Harrington, MD, scientific director of neuroscience at the Huntington Medical Research Institutes, Pasadena, Calif., who presented the findings in a poster at the virtual annual meeting of the American Headache Society.
 

BBB disruption?

The BBB is a well-known structure that regulates what molecules enter the brain, but the blood-CSF barrier, while lesser known, is also important. It comprises choroid plexus epithelial cells that oversee selective exchange of waste products, ions, and nutrients. Acute inflammation or chronic effects from conditions like stroke, multiple sclerosis, and Alzheimer’s disease can alter the function of this barrier.

No other capillary biomarkers were different between controls and patients with migraine – only sVCAM1. “My data supports a highly selective transport change from blood to CSF, which I propose is less likely to come from brain capillaries than choroid plexuses, especially since choroid plexuses produce the bulk of the CSF. It’s a work in progress, but based on this likelihood of choroid plexus involvement, I am accumulating more data that support the choroid plexuses as the primary source of change in migraine,” said Dr. Harrington in an interview.

“The most important finding of the study is that the blood brain barrier is not compromised in people with migraine,” said Rami Burstein, PhD, professor of neuroscience at Harvard Medical School, Boston, who was asked to comment on the findings. “Most unwanted adverse events are caused by drug action inside the brain, and thus, peripherally acting drugs become more favorable as they usually have fewer side effects. Given that the headache aspect of migraine could be intercepted outside the brain, the fact that the BBB is not compromised is a very good news,” Dr. Burstein added.

Dr. Harrington’s team recruited 74 subjects: 14 nonmigraine controls, 16 who were experiencing migraine illness (ictal), 27 not experiencing migraine illness (interictal), and 17 with chronic migraine. The CSF/serum quotient for albumen was higher in the 60 migraineurs than in the 14 controls (5.6 g/L vs. 4.1 g/L; P = .04), as was the CSF/serum quotient for fibrinogen (161.5 g/L vs. 86.1 g/L; P = .007). CSF levels of plasminogen were also higher in patients with migraine (240.7 ng/mL vs. 186.2 ng/mL; P = .03).

When the researchers compared ictal to interictal subjects, they found no difference in fibrinogen or albumen. That suggested that these values are generally increased in migraine patients compared with controls, rather than spiking during attacks. They also divided subjects by annual frequency, including groups experiencing fewer than 24 migraines per year, 24-180 attacks per year, and more than 180 attacks per year. The quotient for fibrinogen increased in migraineurs in general, compared with controls, but then decreased as the frequency of migraine went up (198.6 g/L, 167.0 g/L, and 121.6 g/L, respectively; P = .004).

CSF levels of sVCAM1 were 4.7 ng/mL in controls, 4.5 in the group with fewer than 24 migraines per year, 5.5 in the 24-180 group, and 7.1 in the group with more than 180 (P = .004).
 

Implications for therapy

The research, though at a very early stage, could have implications for therapies. Most drugs that treat migraine remain something of a mystery because researchers don’t know for sure where they act. In the brain? Systemically? The question of permeability of various molecules through both barriers could lend insight into what’s happening. “That’s why there is interest in barrier transport, and we’re showing there is a selective change of transport in migraineurs,” said Dr. Harrington.

As for more general therapeutic implications, “I can only speculate, but clearly there is baseline altered transport, probably in the choroid plexuses of these people,” said Dr. Harrington. He added that in time researchers might test drugs to see if they alter sVCAM1 levels or even develop novel drug candidates to act directly on it.

But he also sounded a note of caution because of the exploratory nature of the study. “These are all really early speculations.”

The study was funded by NIH, the Sunstar Foundation, Wyngs Foundation, and the Higgins Family. Dr. Harrington has no relevant disclosures.

SOURCE: Harrington M et al. AHS 2020, Abstract 842752.

The combination of sodium-glucose transporter-2 (SGLT-2) inhibitors and metformin is not associated with an increase in fracture risk among patients with type 2 diabetes (T2D), according to a new meta-analysis of 25 randomized, controlled trials.

Researchers at The Second Clinical College of Dalian Medical University in Jiangsu, China, compared fracture risk associated with the metformin/SLGT2 combination to metformin alone as well as other T2D therapeutics, and found no differences in risk. The study was published online Aug. 11 in Osteoporosis International.

T2D is associated with an increased risk of fracture, though causative mechanisms remain uncertain. Some lines of evidence suggest multiple factors may contribute to fractures, including hyperglycemia, oxidative stress, toxic effects of advanced glycosylation end-products, altered insulin levels, and treatment-induced hypoglycemia, as well as an association between T2D and increased risk of falls.

Antidiabetes drugs can have positive or negative effects on bone. thiazolidinediones, insulin, and sulfonylureas may increase risk of fractures, while dipeptidyl peptidase-4 (DPP-4) inhibitors and glucagon-like peptide-2 (GLP-2) receptor agonists may be protective. Metformin may also reduce fracture risk.

SGLT-2 inhibitors interrupt glucose reabsorption in the kidney, leading to improved glycemic control. Other benefits include improved renal and cardiovascular outcomes, weight loss, and reduced blood pressure, liver fat, and serum uric acid levels.

These properties have made SGLT-2 inhibitors combined with metformin an important therapy for patients at high risk of atherosclerotic disease, or who have heart failure or chronic kidney disease.

But SGLT-2 inhibition increases osmotic diuresis, and this could alter the mineral balance within bone. Some studies also showed that SGLT-2 inhibitors led to changes in bone turnover markers, bone mineral density, and bone microarchitecture. Observational studies of the SGLT-2 inhibitor canagliflozin found associations with a higher rate of fracture risk in patients taking the drug.

Such studies carry the risk of confounding factors, so the researchers took advantage of the fact that many recent clinical trials have examined the impact of SGLT-2 inhibitors on T2D. They pooled data from 25 clinical trials with a total of 19,500 participants, 9,662 of whom received SGLT-2 inhibitors plus metformin; 9,838 received other active comparators.

The fracture rate was 0.91% in the SGLT-2 inhibitors/metformin group, and 0.80% among controls (odds ratio, 0.97; 95% CI, 0.71-1.32), with no heterogeneity. Metformin alone was not associated with a change in fracture rate (OR, 0.95; 95% CI, 0.44-2.08), nor were other forms of diabetes control (OR, 0.95; 95% CI, 0.69-1.31).

There were some differences in fracture risk among SGLT-2 inhibitors when studied individually, though none differed significantly from controls. The highest risk was associated with the canagliflozin/metformin (OR, 2.19; 95% CI, 0.66-7.27), followed by dapagliflozin/metformin (OR, 0.91; 95% CI, 0.50-1.64), empagliflozin/metformin (OR, 0.94; 95% CI, 0.59-1.50), and ertugliflozin/metformin (OR, 0.76; 95% CI, 0.38-1.54).

There were no differences with respect to hip or lumbar spine fractures, or other fractures. The researchers found no differences in bone mineral density or bone turnover markers.

The meta-analysis is limited by the relatively short average follow-up in the included studies, which was 61 weeks. Bone damage may occur over longer time periods. Bone fractures were also not a prespecified adverse event in most included studies.

The studies also did not provide detailed information on the types of fractures experienced, such as whether they were result of a fall, or the location of the fracture, or bone health parameters. Although the results support a belief that SGLT-2 inhibitors do not adversely affect bone health, “given limited information on bone health outcomes, further work is needed to validate this conclusion,” the authors wrote.

The authors did not disclose any funding and had no relevant conflicts of interest.

SOURCE: B-B Qian et al. Osteoporosis Int. 2020 Aug 11. doi: 10.1007/s00198-020-05590-y.

The combination of sodium-glucose transporter-2 (SGLT-2) inhibitors and metformin is not associated with an increase in fracture risk among patients with type 2 diabetes (T2D), according to a new meta-analysis of 25 randomized, controlled trials.

Researchers at The Second Clinical College of Dalian Medical University in Jiangsu, China, compared fracture risk associated with the metformin/SLGT2 combination to metformin alone as well as other T2D therapeutics, and found no differences in risk. The study was published online Aug. 11 in Osteoporosis International.

T2D is associated with an increased risk of fracture, though causative mechanisms remain uncertain. Some lines of evidence suggest multiple factors may contribute to fractures, including hyperglycemia, oxidative stress, toxic effects of advanced glycosylation end-products, altered insulin levels, and treatment-induced hypoglycemia, as well as an association between T2D and increased risk of falls.

Antidiabetes drugs can have positive or negative effects on bone. thiazolidinediones, insulin, and sulfonylureas may increase risk of fractures, while dipeptidyl peptidase-4 (DPP-4) inhibitors and glucagon-like peptide-2 (GLP-2) receptor agonists may be protective. Metformin may also reduce fracture risk.

SGLT-2 inhibitors interrupt glucose reabsorption in the kidney, leading to improved glycemic control. Other benefits include improved renal and cardiovascular outcomes, weight loss, and reduced blood pressure, liver fat, and serum uric acid levels.

These properties have made SGLT-2 inhibitors combined with metformin an important therapy for patients at high risk of atherosclerotic disease, or who have heart failure or chronic kidney disease.

But SGLT-2 inhibition increases osmotic diuresis, and this could alter the mineral balance within bone. Some studies also showed that SGLT-2 inhibitors led to changes in bone turnover markers, bone mineral density, and bone microarchitecture. Observational studies of the SGLT-2 inhibitor canagliflozin found associations with a higher rate of fracture risk in patients taking the drug.

Such studies carry the risk of confounding factors, so the researchers took advantage of the fact that many recent clinical trials have examined the impact of SGLT-2 inhibitors on T2D. They pooled data from 25 clinical trials with a total of 19,500 participants, 9,662 of whom received SGLT-2 inhibitors plus metformin; 9,838 received other active comparators.

The fracture rate was 0.91% in the SGLT-2 inhibitors/metformin group, and 0.80% among controls (odds ratio, 0.97; 95% CI, 0.71-1.32), with no heterogeneity. Metformin alone was not associated with a change in fracture rate (OR, 0.95; 95% CI, 0.44-2.08), nor were other forms of diabetes control (OR, 0.95; 95% CI, 0.69-1.31).

There were some differences in fracture risk among SGLT-2 inhibitors when studied individually, though none differed significantly from controls. The highest risk was associated with the canagliflozin/metformin (OR, 2.19; 95% CI, 0.66-7.27), followed by dapagliflozin/metformin (OR, 0.91; 95% CI, 0.50-1.64), empagliflozin/metformin (OR, 0.94; 95% CI, 0.59-1.50), and ertugliflozin/metformin (OR, 0.76; 95% CI, 0.38-1.54).

There were no differences with respect to hip or lumbar spine fractures, or other fractures. The researchers found no differences in bone mineral density or bone turnover markers.

The meta-analysis is limited by the relatively short average follow-up in the included studies, which was 61 weeks. Bone damage may occur over longer time periods. Bone fractures were also not a prespecified adverse event in most included studies.

The studies also did not provide detailed information on the types of fractures experienced, such as whether they were result of a fall, or the location of the fracture, or bone health parameters. Although the results support a belief that SGLT-2 inhibitors do not adversely affect bone health, “given limited information on bone health outcomes, further work is needed to validate this conclusion,” the authors wrote.

The authors did not disclose any funding and had no relevant conflicts of interest.

SOURCE: B-B Qian et al. Osteoporosis Int. 2020 Aug 11. doi: 10.1007/s00198-020-05590-y.

The combination of sodium-glucose transporter-2 (SGLT-2) inhibitors and metformin is not associated with an increase in fracture risk among patients with type 2 diabetes (T2D), according to a new meta-analysis of 25 randomized, controlled trials.

Researchers at The Second Clinical College of Dalian Medical University in Jiangsu, China, compared fracture risk associated with the metformin/SLGT2 combination to metformin alone as well as other T2D therapeutics, and found no differences in risk. The study was published online Aug. 11 in Osteoporosis International.

T2D is associated with an increased risk of fracture, though causative mechanisms remain uncertain. Some lines of evidence suggest multiple factors may contribute to fractures, including hyperglycemia, oxidative stress, toxic effects of advanced glycosylation end-products, altered insulin levels, and treatment-induced hypoglycemia, as well as an association between T2D and increased risk of falls.

Antidiabetes drugs can have positive or negative effects on bone. thiazolidinediones, insulin, and sulfonylureas may increase risk of fractures, while dipeptidyl peptidase-4 (DPP-4) inhibitors and glucagon-like peptide-2 (GLP-2) receptor agonists may be protective. Metformin may also reduce fracture risk.

SGLT-2 inhibitors interrupt glucose reabsorption in the kidney, leading to improved glycemic control. Other benefits include improved renal and cardiovascular outcomes, weight loss, and reduced blood pressure, liver fat, and serum uric acid levels.

These properties have made SGLT-2 inhibitors combined with metformin an important therapy for patients at high risk of atherosclerotic disease, or who have heart failure or chronic kidney disease.

But SGLT-2 inhibition increases osmotic diuresis, and this could alter the mineral balance within bone. Some studies also showed that SGLT-2 inhibitors led to changes in bone turnover markers, bone mineral density, and bone microarchitecture. Observational studies of the SGLT-2 inhibitor canagliflozin found associations with a higher rate of fracture risk in patients taking the drug.

Such studies carry the risk of confounding factors, so the researchers took advantage of the fact that many recent clinical trials have examined the impact of SGLT-2 inhibitors on T2D. They pooled data from 25 clinical trials with a total of 19,500 participants, 9,662 of whom received SGLT-2 inhibitors plus metformin; 9,838 received other active comparators.

The fracture rate was 0.91% in the SGLT-2 inhibitors/metformin group, and 0.80% among controls (odds ratio, 0.97; 95% CI, 0.71-1.32), with no heterogeneity. Metformin alone was not associated with a change in fracture rate (OR, 0.95; 95% CI, 0.44-2.08), nor were other forms of diabetes control (OR, 0.95; 95% CI, 0.69-1.31).

There were some differences in fracture risk among SGLT-2 inhibitors when studied individually, though none differed significantly from controls. The highest risk was associated with the canagliflozin/metformin (OR, 2.19; 95% CI, 0.66-7.27), followed by dapagliflozin/metformin (OR, 0.91; 95% CI, 0.50-1.64), empagliflozin/metformin (OR, 0.94; 95% CI, 0.59-1.50), and ertugliflozin/metformin (OR, 0.76; 95% CI, 0.38-1.54).

There were no differences with respect to hip or lumbar spine fractures, or other fractures. The researchers found no differences in bone mineral density or bone turnover markers.

The meta-analysis is limited by the relatively short average follow-up in the included studies, which was 61 weeks. Bone damage may occur over longer time periods. Bone fractures were also not a prespecified adverse event in most included studies.

The studies also did not provide detailed information on the types of fractures experienced, such as whether they were result of a fall, or the location of the fracture, or bone health parameters. Although the results support a belief that SGLT-2 inhibitors do not adversely affect bone health, “given limited information on bone health outcomes, further work is needed to validate this conclusion,” the authors wrote.

The authors did not disclose any funding and had no relevant conflicts of interest.

SOURCE: B-B Qian et al. Osteoporosis Int. 2020 Aug 11. doi: 10.1007/s00198-020-05590-y.

Polycystic ovarian syndrome (PCOS) was associated with a nearly doubled risk of developing psoriasis in a propensity score–matched analysis conducted in Taiwan.

PCOS is characterized by androgen elevation that can lead to insulin resistance and metabolic syndrome, which have also been associated with an increased risk of psoriasis. Previous retrospective analyses have suggested an increased risk of psoriasis associated with PCOS, and psoriasis patients with PCOS have been reported to have more severe skin lesions, compared with those who do not have PCOS.

“The incidence of psoriasis is indeed higher in the PCOS group than in the control group, and the comorbidities related to metabolic syndrome did not modify the adjusted hazard ratio,” said Ming-Li Chen, during her presentation of the study results at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis. Dr. Chen is at Chung Shan Medical University in Taiwan.

The researchers analyzed 1 million randomly selected records from Taiwan’s Longitudinal Health Insurance database, a subset of the country’s National Health Insurance Program. Between 2000 and 2012, they identified a case group with at least three outpatient diagnoses or one inpatient diagnosis of PCOS; they then compared each with four patients who did not have PCOS who were matched by age and index year. The mean age in both groups was about 27 years.

The mean follow-up times were 6.99 years for 4,707 cases and 6.94 years for 18,828 controls. Comorbidities were slightly higher in the PCOS group, including asthma (6.7% vs. 4.9%; P less than .001), chronic obstructive pulmonary disease (14% vs. 11%; P less than .001), chronic liver disease (8.0% vs. 5.0%; P less than .001), diabetes mellitus (3.0% vs. 1.4%; P less than .001), hypertension (2.4% vs. 1.5%; P less than .001), hyperlipidemia (5.4% vs. 2.5%; P less than .001), depression (5.4% vs. 3.9%; P less than .001), and sleep apnea (0.23% vs. 0.10%; P = .040).

There was a higher cumulative incidence of psoriasis in the PCOS group (adjusted hazard ratio, 2.07; 95% confidence interval, 1.25-3.44). Other factors associated with increased risk of psoriasis were advanced age (greater than 50 years old; aHR, 14.13; 95% CI, 1.8-110.7) and having a cancer diagnosis (aHR, 11.72; 95% CI, 2.87-47.9).

When PCOS patients were stratified by age, the researchers noted a higher risk of psoriasis among those 20 years or younger (aHR, 4.02; 95% CI, 1.16-13.9) than among those aged 20-50 years (aHR, 1.88; 95% CI, 1.07-3.29). Among those older than 50 years, there was no significantly increased risk, although the number of psoriasis diagnoses and population sizes were small in the latter category. Among patients with PCOS, a cancer diagnosis was not associated with a statistically significant increased risk of psoriasis.

The mechanisms underlying the association between PCOS and psoriasis should be studied further, she noted.

Following Dr. Chen’s prerecorded presentation, there was a live discussion session led by Alice Gottlieb, MD, PhD, medical director of Mount Sinai Beth Israel Dermatology, New York, and Ennio Lubrano, MD, associate professor of rheumatology at the University of Molise (Italy). Dr. Gottlieb noted that the study did not appear to account for weight in the association between PCOS and psoriasis, since heavier people are known to be at greater risk of developing psoriasis. Dr. Chen acknowledged that the study had no records of BMI or weight.

Dr. Gottlieb also wondered if treatment of PCOS led to any improvements in psoriasis in patients with the two diagnoses. “If we treat PCOS, does the psoriasis get better?” Again, the study did not address the question. “We didn’t follow up on therapies,” Dr. Chen said.

Dr. Chen reported no relevant financial disclosures. Dr. Gottlieb is a consultant, advisory board member and/or speaker for AbbVie, Allergan, Avotres Therapeutics, Beiersdorf, Bristol-Myers Squibb, Celgene, Dermira, Eli Lilly, Incyte, Janssen, Leo, Novartis, Reddy Labs, Sun Pharmaceutical Industries, UCB Pharma and Xbiotech. She has received research or educational grants from Boehringer Ingelheim, Incyte, Janssen, Novartis and Xbiotech.

Polycystic ovarian syndrome (PCOS) was associated with a nearly doubled risk of developing psoriasis in a propensity score–matched analysis conducted in Taiwan.

PCOS is characterized by androgen elevation that can lead to insulin resistance and metabolic syndrome, which have also been associated with an increased risk of psoriasis. Previous retrospective analyses have suggested an increased risk of psoriasis associated with PCOS, and psoriasis patients with PCOS have been reported to have more severe skin lesions, compared with those who do not have PCOS.

“The incidence of psoriasis is indeed higher in the PCOS group than in the control group, and the comorbidities related to metabolic syndrome did not modify the adjusted hazard ratio,” said Ming-Li Chen, during her presentation of the study results at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis. Dr. Chen is at Chung Shan Medical University in Taiwan.

The researchers analyzed 1 million randomly selected records from Taiwan’s Longitudinal Health Insurance database, a subset of the country’s National Health Insurance Program. Between 2000 and 2012, they identified a case group with at least three outpatient diagnoses or one inpatient diagnosis of PCOS; they then compared each with four patients who did not have PCOS who were matched by age and index year. The mean age in both groups was about 27 years.

The mean follow-up times were 6.99 years for 4,707 cases and 6.94 years for 18,828 controls. Comorbidities were slightly higher in the PCOS group, including asthma (6.7% vs. 4.9%; P less than .001), chronic obstructive pulmonary disease (14% vs. 11%; P less than .001), chronic liver disease (8.0% vs. 5.0%; P less than .001), diabetes mellitus (3.0% vs. 1.4%; P less than .001), hypertension (2.4% vs. 1.5%; P less than .001), hyperlipidemia (5.4% vs. 2.5%; P less than .001), depression (5.4% vs. 3.9%; P less than .001), and sleep apnea (0.23% vs. 0.10%; P = .040).

There was a higher cumulative incidence of psoriasis in the PCOS group (adjusted hazard ratio, 2.07; 95% confidence interval, 1.25-3.44). Other factors associated with increased risk of psoriasis were advanced age (greater than 50 years old; aHR, 14.13; 95% CI, 1.8-110.7) and having a cancer diagnosis (aHR, 11.72; 95% CI, 2.87-47.9).

When PCOS patients were stratified by age, the researchers noted a higher risk of psoriasis among those 20 years or younger (aHR, 4.02; 95% CI, 1.16-13.9) than among those aged 20-50 years (aHR, 1.88; 95% CI, 1.07-3.29). Among those older than 50 years, there was no significantly increased risk, although the number of psoriasis diagnoses and population sizes were small in the latter category. Among patients with PCOS, a cancer diagnosis was not associated with a statistically significant increased risk of psoriasis.

The mechanisms underlying the association between PCOS and psoriasis should be studied further, she noted.

Following Dr. Chen’s prerecorded presentation, there was a live discussion session led by Alice Gottlieb, MD, PhD, medical director of Mount Sinai Beth Israel Dermatology, New York, and Ennio Lubrano, MD, associate professor of rheumatology at the University of Molise (Italy). Dr. Gottlieb noted that the study did not appear to account for weight in the association between PCOS and psoriasis, since heavier people are known to be at greater risk of developing psoriasis. Dr. Chen acknowledged that the study had no records of BMI or weight.

Dr. Gottlieb also wondered if treatment of PCOS led to any improvements in psoriasis in patients with the two diagnoses. “If we treat PCOS, does the psoriasis get better?” Again, the study did not address the question. “We didn’t follow up on therapies,” Dr. Chen said.

Dr. Chen reported no relevant financial disclosures. Dr. Gottlieb is a consultant, advisory board member and/or speaker for AbbVie, Allergan, Avotres Therapeutics, Beiersdorf, Bristol-Myers Squibb, Celgene, Dermira, Eli Lilly, Incyte, Janssen, Leo, Novartis, Reddy Labs, Sun Pharmaceutical Industries, UCB Pharma and Xbiotech. She has received research or educational grants from Boehringer Ingelheim, Incyte, Janssen, Novartis and Xbiotech.

Polycystic ovarian syndrome (PCOS) was associated with a nearly doubled risk of developing psoriasis in a propensity score–matched analysis conducted in Taiwan.

PCOS is characterized by androgen elevation that can lead to insulin resistance and metabolic syndrome, which have also been associated with an increased risk of psoriasis. Previous retrospective analyses have suggested an increased risk of psoriasis associated with PCOS, and psoriasis patients with PCOS have been reported to have more severe skin lesions, compared with those who do not have PCOS.

“The incidence of psoriasis is indeed higher in the PCOS group than in the control group, and the comorbidities related to metabolic syndrome did not modify the adjusted hazard ratio,” said Ming-Li Chen, during her presentation of the study results at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis. Dr. Chen is at Chung Shan Medical University in Taiwan.

The researchers analyzed 1 million randomly selected records from Taiwan’s Longitudinal Health Insurance database, a subset of the country’s National Health Insurance Program. Between 2000 and 2012, they identified a case group with at least three outpatient diagnoses or one inpatient diagnosis of PCOS; they then compared each with four patients who did not have PCOS who were matched by age and index year. The mean age in both groups was about 27 years.

The mean follow-up times were 6.99 years for 4,707 cases and 6.94 years for 18,828 controls. Comorbidities were slightly higher in the PCOS group, including asthma (6.7% vs. 4.9%; P less than .001), chronic obstructive pulmonary disease (14% vs. 11%; P less than .001), chronic liver disease (8.0% vs. 5.0%; P less than .001), diabetes mellitus (3.0% vs. 1.4%; P less than .001), hypertension (2.4% vs. 1.5%; P less than .001), hyperlipidemia (5.4% vs. 2.5%; P less than .001), depression (5.4% vs. 3.9%; P less than .001), and sleep apnea (0.23% vs. 0.10%; P = .040).

There was a higher cumulative incidence of psoriasis in the PCOS group (adjusted hazard ratio, 2.07; 95% confidence interval, 1.25-3.44). Other factors associated with increased risk of psoriasis were advanced age (greater than 50 years old; aHR, 14.13; 95% CI, 1.8-110.7) and having a cancer diagnosis (aHR, 11.72; 95% CI, 2.87-47.9).

When PCOS patients were stratified by age, the researchers noted a higher risk of psoriasis among those 20 years or younger (aHR, 4.02; 95% CI, 1.16-13.9) than among those aged 20-50 years (aHR, 1.88; 95% CI, 1.07-3.29). Among those older than 50 years, there was no significantly increased risk, although the number of psoriasis diagnoses and population sizes were small in the latter category. Among patients with PCOS, a cancer diagnosis was not associated with a statistically significant increased risk of psoriasis.

The mechanisms underlying the association between PCOS and psoriasis should be studied further, she noted.

Following Dr. Chen’s prerecorded presentation, there was a live discussion session led by Alice Gottlieb, MD, PhD, medical director of Mount Sinai Beth Israel Dermatology, New York, and Ennio Lubrano, MD, associate professor of rheumatology at the University of Molise (Italy). Dr. Gottlieb noted that the study did not appear to account for weight in the association between PCOS and psoriasis, since heavier people are known to be at greater risk of developing psoriasis. Dr. Chen acknowledged that the study had no records of BMI or weight.

Dr. Gottlieb also wondered if treatment of PCOS led to any improvements in psoriasis in patients with the two diagnoses. “If we treat PCOS, does the psoriasis get better?” Again, the study did not address the question. “We didn’t follow up on therapies,” Dr. Chen said.

Dr. Chen reported no relevant financial disclosures. Dr. Gottlieb is a consultant, advisory board member and/or speaker for AbbVie, Allergan, Avotres Therapeutics, Beiersdorf, Bristol-Myers Squibb, Celgene, Dermira, Eli Lilly, Incyte, Janssen, Leo, Novartis, Reddy Labs, Sun Pharmaceutical Industries, UCB Pharma and Xbiotech. She has received research or educational grants from Boehringer Ingelheim, Incyte, Janssen, Novartis and Xbiotech.

Treatment of psoriasis with biologics was associated with a reduced risk of developing psoriatic arthritis compared with conventional disease-modifying antirheumatic drugs (DMARDs), in a single center retrospective analysis in Argentina that followed patients for almost 2 decades.

About 30%-40% of patients with psoriasis go on to develop psoriatic arthritis (PsA), usually on average about 10 years after the onset of psoriasis. One potential mechanism of PsA onset is through enthesitis, which has been described at subclinical levels in psoriasis.

“It could be speculated that treatment with biologics in patients with psoriasis could prevent the development of psoriatic arthritis, perhaps by inhibiting the subclinical development of enthesitis,” Luciano Lo Giudice, MD, a rheumatology fellow at Hospital Italiano de Buenos Aires, said during his presentation at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.

Although these results do not prove that treatment of the underlying disease delays progression to PsA, it is suggestive, and highlights an emerging field of research, according to Diamant Thaçi, MD, PhD, professor of medicine at University Hospital Schleswig-Holstein, Germany, who led a live discussion following a prerecorded presentation of the results. “We’re going in this direction – how can we prevent psoriatic arthritis, how can we delay it. We are just starting to think about this,” Dr. Thaçi said in an interview.

The researchers examined medical records of 1,626 patients with psoriasis treated at their center between 2000 and 2019, with a total of 15,152 years of follow-up. Of these patients, 1,293 were treated with topical medication, 229 with conventional DMARDs (methotrexate in 77%, cyclosporine in 13%, and both in 10%), and 104 with biologics, including etanercept (34%), secukinumab (20%), adalimumab (20%), ustekinumab (12%), ixekizumab (9%), and infliximab (5%).

They found that 11% in the topical treatment group developed PsA, as did 3.5% in the conventional DMARD group, 1.9% in the biologics group, and 9.1% overall. Treatment with biologics was associated with a significantly lower odds of developing PsA compared with treatment with conventional DMARDs (3 versus 17.2 per 1,000 patient-years; incidence rate ratio [IRR], 0.17; P = .0177). There was a trend toward reduced odds of developing PsA among those on biologic therapy compared with those on topicals (3 versus 9.8 per 1,000 patient-years; IRR, 0.3; P = .0588).

The researchers confirmed all medical encounters using electronic medical records and the study had a long follow-up time, but was limited by the single center and its retrospective nature. It also could not associate reduced risk with specific biologics.

The findings probably reflect the presence of subclinical PsA that many clinicians don’t see, according to Dr. Thaçi. While a dermatology practice might find PsA in 2% or 3%, or at most, 10% of patients with psoriasis, “in our department it’s about 50 to 60 percent of patients who have psoriatic arthritis, because we diagnose it early,” he said.

He found the results of the study encouraging. “It looks like some of the biologics, for example IL [interleukin]-17 or even IL-23 [blockers] may have an influence on occurrence or delay the occurrence of psoriatic arthritis.”

Dr. Thaçi noted that early treatment of skin lesions can increase the probability of longer remissions, especially with IL-23 blockers. Still, that’s no guarantee the same would hold true for PsA risk. “Skin is skin and joints are joints,” Dr. Thaçi said.

Dr. Thaçi and Dr. Lo Giudice had no relevant financial disclosures.

Treatment of psoriasis with biologics was associated with a reduced risk of developing psoriatic arthritis compared with conventional disease-modifying antirheumatic drugs (DMARDs), in a single center retrospective analysis in Argentina that followed patients for almost 2 decades.

About 30%-40% of patients with psoriasis go on to develop psoriatic arthritis (PsA), usually on average about 10 years after the onset of psoriasis. One potential mechanism of PsA onset is through enthesitis, which has been described at subclinical levels in psoriasis.

“It could be speculated that treatment with biologics in patients with psoriasis could prevent the development of psoriatic arthritis, perhaps by inhibiting the subclinical development of enthesitis,” Luciano Lo Giudice, MD, a rheumatology fellow at Hospital Italiano de Buenos Aires, said during his presentation at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.

Although these results do not prove that treatment of the underlying disease delays progression to PsA, it is suggestive, and highlights an emerging field of research, according to Diamant Thaçi, MD, PhD, professor of medicine at University Hospital Schleswig-Holstein, Germany, who led a live discussion following a prerecorded presentation of the results. “We’re going in this direction – how can we prevent psoriatic arthritis, how can we delay it. We are just starting to think about this,” Dr. Thaçi said in an interview.

The researchers examined medical records of 1,626 patients with psoriasis treated at their center between 2000 and 2019, with a total of 15,152 years of follow-up. Of these patients, 1,293 were treated with topical medication, 229 with conventional DMARDs (methotrexate in 77%, cyclosporine in 13%, and both in 10%), and 104 with biologics, including etanercept (34%), secukinumab (20%), adalimumab (20%), ustekinumab (12%), ixekizumab (9%), and infliximab (5%).

They found that 11% in the topical treatment group developed PsA, as did 3.5% in the conventional DMARD group, 1.9% in the biologics group, and 9.1% overall. Treatment with biologics was associated with a significantly lower odds of developing PsA compared with treatment with conventional DMARDs (3 versus 17.2 per 1,000 patient-years; incidence rate ratio [IRR], 0.17; P = .0177). There was a trend toward reduced odds of developing PsA among those on biologic therapy compared with those on topicals (3 versus 9.8 per 1,000 patient-years; IRR, 0.3; P = .0588).

The researchers confirmed all medical encounters using electronic medical records and the study had a long follow-up time, but was limited by the single center and its retrospective nature. It also could not associate reduced risk with specific biologics.

The findings probably reflect the presence of subclinical PsA that many clinicians don’t see, according to Dr. Thaçi. While a dermatology practice might find PsA in 2% or 3%, or at most, 10% of patients with psoriasis, “in our department it’s about 50 to 60 percent of patients who have psoriatic arthritis, because we diagnose it early,” he said.

He found the results of the study encouraging. “It looks like some of the biologics, for example IL [interleukin]-17 or even IL-23 [blockers] may have an influence on occurrence or delay the occurrence of psoriatic arthritis.”

Dr. Thaçi noted that early treatment of skin lesions can increase the probability of longer remissions, especially with IL-23 blockers. Still, that’s no guarantee the same would hold true for PsA risk. “Skin is skin and joints are joints,” Dr. Thaçi said.

Dr. Thaçi and Dr. Lo Giudice had no relevant financial disclosures.

Treatment of psoriasis with biologics was associated with a reduced risk of developing psoriatic arthritis compared with conventional disease-modifying antirheumatic drugs (DMARDs), in a single center retrospective analysis in Argentina that followed patients for almost 2 decades.

About 30%-40% of patients with psoriasis go on to develop psoriatic arthritis (PsA), usually on average about 10 years after the onset of psoriasis. One potential mechanism of PsA onset is through enthesitis, which has been described at subclinical levels in psoriasis.

“It could be speculated that treatment with biologics in patients with psoriasis could prevent the development of psoriatic arthritis, perhaps by inhibiting the subclinical development of enthesitis,” Luciano Lo Giudice, MD, a rheumatology fellow at Hospital Italiano de Buenos Aires, said during his presentation at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.

Although these results do not prove that treatment of the underlying disease delays progression to PsA, it is suggestive, and highlights an emerging field of research, according to Diamant Thaçi, MD, PhD, professor of medicine at University Hospital Schleswig-Holstein, Germany, who led a live discussion following a prerecorded presentation of the results. “We’re going in this direction – how can we prevent psoriatic arthritis, how can we delay it. We are just starting to think about this,” Dr. Thaçi said in an interview.

The researchers examined medical records of 1,626 patients with psoriasis treated at their center between 2000 and 2019, with a total of 15,152 years of follow-up. Of these patients, 1,293 were treated with topical medication, 229 with conventional DMARDs (methotrexate in 77%, cyclosporine in 13%, and both in 10%), and 104 with biologics, including etanercept (34%), secukinumab (20%), adalimumab (20%), ustekinumab (12%), ixekizumab (9%), and infliximab (5%).

They found that 11% in the topical treatment group developed PsA, as did 3.5% in the conventional DMARD group, 1.9% in the biologics group, and 9.1% overall. Treatment with biologics was associated with a significantly lower odds of developing PsA compared with treatment with conventional DMARDs (3 versus 17.2 per 1,000 patient-years; incidence rate ratio [IRR], 0.17; P = .0177). There was a trend toward reduced odds of developing PsA among those on biologic therapy compared with those on topicals (3 versus 9.8 per 1,000 patient-years; IRR, 0.3; P = .0588).

The researchers confirmed all medical encounters using electronic medical records and the study had a long follow-up time, but was limited by the single center and its retrospective nature. It also could not associate reduced risk with specific biologics.

The findings probably reflect the presence of subclinical PsA that many clinicians don’t see, according to Dr. Thaçi. While a dermatology practice might find PsA in 2% or 3%, or at most, 10% of patients with psoriasis, “in our department it’s about 50 to 60 percent of patients who have psoriatic arthritis, because we diagnose it early,” he said.

He found the results of the study encouraging. “It looks like some of the biologics, for example IL [interleukin]-17 or even IL-23 [blockers] may have an influence on occurrence or delay the occurrence of psoriatic arthritis.”

Dr. Thaçi noted that early treatment of skin lesions can increase the probability of longer remissions, especially with IL-23 blockers. Still, that’s no guarantee the same would hold true for PsA risk. “Skin is skin and joints are joints,” Dr. Thaçi said.

Dr. Thaçi and Dr. Lo Giudice had no relevant financial disclosures.

Two new long-term studies, one an extension trial and the other an analysis of real-world experience, show that the RNS System direct brain responsive neurostimulator leads to reduction of seizure frequency in most epilepsy patients who had it implanted. Both studies showed that the benefit from the devices increased over time.

That accruing benefit may be because of improved protocols as clinicians gain experience with the device or because of network remodeling that occurs over time as seizures are controlled. “I think it’s both,” said Martha Morrell, MD, a clinical professor of neurology at Stanford (Calif.) University and chief medical officer at NeuroPace, the company that has marketed the device since it gained FDA approval in 2013.

In both studies, the slope of improvement over time was similar, but the real-world study showed greater improvement at the beginning of treatment. “I think the slopes represent physiological changes, but the fact that [the real-world study] starts with better outcomes is, I think, directly attributable to learning. When the long-term study was started in 2004, this had never been done before, and we had to make a highly educated guess about what we should do, and the initial stimulatory parameters were programmed in a way that’s very similar to what was used for movement disorders,” Dr. Morrell said in an interview.

The long-term treatment study appeared online July 20 in the journal Neurology, while the real-world analysis was published July 13 in Epilepsia.
 

An alternative option

Medications can effectively treat some seizures, but 30%-40% of patients must turn to other options for control. Surgery can sometimes be curative, but is not suitable for some patients. Other stimulation devices include vagus nerve stimulation (VNS), which sends pulses from a chest implant to the vagus nerve, reducing epileptic attacks through an unknown mechanism. Deep brain stimulation (DBS) places electrodes that deliver stimulation to the anterior nucleus of the thalamus, which can spread initially localized seizures.

The RNS device consists of a neurostimulator implanted cranially and connected to leads that are placed based on the individual patient’s seizure focus or foci. It also continuously monitors brain activity and delivers stimulation only when its signal suggests the beginning of a seizure.

That capacity for recording is a key benefit because the information can be stored and analyzed, according to Vikram Rao, MD, PhD, a coinvestigator in the real-world trial and an associate professor and the epilepsy division chief at the University of California, San Francisco, which was one of the trial centers. “You know more precisely than we previously did how many seizures a patient is having. Many of our patients are not able to quantify their seizures with perfect accuracy, so we’re better quantifying their seizure burden,” Dr. Rao said in an interview.

The ability to monitor patients can also improve clinical management. Dr. Morrell recounted an elderly patient who for many years has driven 5 hours for appointments. Recently she was able to review his data from the RNS System remotely. She determined that he was doing fine and, after a telephone consultation, told him he didn’t need to come in for a scheduled visit.
 

Real-world analysis

In the real-world analysis, researchers led by Babak Razavi, PhD, and Casey Halpern, MD, at Stanford University conducted a chart review of 150 patients at eight centers who underwent treatment with the RNS system between 2013 and 2018. All patients were followed at least 1 year, with a mean of 2.3 years. Patients had a median of 7.7 disabling seizures per month. The mean value was 52 and the numbers ranged from 0.1 to 3,000. A total of 60% had abnormal brain MRI findings.

At 1 year, subjects achieved a mean 67% decrease in seizure frequency (interquartile range, 50%-94%). At 2 years, that grew to 77%; at 3 or more years, 84%. There was no significant difference in seizure reduction at 1 year according to age, age at epilepsy onset, duration of epilepsy, location of seizure foci, presence of brain MRI abnormalities, prior intracranial monitoring, prior epilepsy surgery, or prior VNS treatment. When patients who underwent a resection at the time of RNS placement were excluded, the results were similar. There were no significant differences in outcome by center.

A total of 11.3% of patients experienced a device-related serious adverse event, and 4% developed infections. The rate of infection was not significantly different between patients who had the neurostimulator and leads implanted alone (3.0%) and patients who had intracranial EEG diagnostic monitoring (ICM) electrodes removed at the same time (6.1%; P = .38).

Although about one-third of the patients who started the long-term study dropped out before completion, most were because the participants moved away from treatment centers, according to Dr. Morrell, and other evidence points squarely to patient satisfaction. “At the end of the battery’s longevity, the neurostimulator needs to be replaced. It’s an outpatient, 45-minute procedure. Over 90% of patients chose to have it replaced. It’s not the answer for everybody, but the substantial majority of patients choose to continue,” she said.
 

Extension trial

The open-label extension trial, led by Dileep Nair, MD, of the Cleveland Clinic Foundation and Dr. Morrell, followed 230 of the 256 patients who participated in 2-year phase 3 study or feasibility studies, extending device usage to 9 years. A total of 162 completed follow-up (mean, 7.5 years). The median reduction of seizure frequency was 58% at the end of year 3, and 75% by year 9 (P < .0001; Wilcoxon signed rank). Although patient population enrichment could have explained this observation, other analyses confirmed that the improvement was real.

Nearly 75% had at least a 50% reduction in seizure frequency; 35% had a 90% or greater reduction in seizure frequency. Some patients (18.4%) had at least a full year with no seizures, and 62% who had a 1-year seizure-free period experienced no seizures at the latest follow-up. Overall, 21% had no seizures in the last 6 months of follow-up.

For those with a seizure-free period of more than 1 year, the average duration was 3.2 years (range, 1.04-9.6 years). There was no difference in response among patients based on previous antiseizure medication use or previous epilepsy surgery, VNS treatment, or intracranial monitoring, and there were no differences by patient age at enrollment, age of seizure onset, brain imaging abnormality, seizure onset locality, or number of foci.

The researchers noted improvement in overall Quality of Life in Epilepsy Inventory–89 scores at 1 year (mean, +3.2; P < .0001), which continued through year 9 (mean, +1.9; P < .05). Improvements were also seen in epilepsy targeted (mean, +4.5; P < .001) and cognitive domains (mean, +2.5; P = .005). Risk of infection was 4.1% per procedure, and 12.1% of subjects overall experienced a serious device-related implant infection. Of 35 infections, 16 led to device removal.

The extension study was funded by NeuroPace. NeuroPace supported data entry and institutional review board submission for the real-world trial. Dr. Morrell owns stock and is an employee of NeuroPace. Dr Rao has received support from and/or consulted for NeuroPace.

SOURCE: Nair DR et al. Neurology. 2020 Jul 20. doi: 10.1212/WNL.0000000000010154. Razavi B et al. Epilepsia. 2020 Jul 13. doi: 10.1111/epi.16593.

Two new long-term studies, one an extension trial and the other an analysis of real-world experience, show that the RNS System direct brain responsive neurostimulator leads to reduction of seizure frequency in most epilepsy patients who had it implanted. Both studies showed that the benefit from the devices increased over time.

That accruing benefit may be because of improved protocols as clinicians gain experience with the device or because of network remodeling that occurs over time as seizures are controlled. “I think it’s both,” said Martha Morrell, MD, a clinical professor of neurology at Stanford (Calif.) University and chief medical officer at NeuroPace, the company that has marketed the device since it gained FDA approval in 2013.

In both studies, the slope of improvement over time was similar, but the real-world study showed greater improvement at the beginning of treatment. “I think the slopes represent physiological changes, but the fact that [the real-world study] starts with better outcomes is, I think, directly attributable to learning. When the long-term study was started in 2004, this had never been done before, and we had to make a highly educated guess about what we should do, and the initial stimulatory parameters were programmed in a way that’s very similar to what was used for movement disorders,” Dr. Morrell said in an interview.

The long-term treatment study appeared online July 20 in the journal Neurology, while the real-world analysis was published July 13 in Epilepsia.
 

An alternative option

Medications can effectively treat some seizures, but 30%-40% of patients must turn to other options for control. Surgery can sometimes be curative, but is not suitable for some patients. Other stimulation devices include vagus nerve stimulation (VNS), which sends pulses from a chest implant to the vagus nerve, reducing epileptic attacks through an unknown mechanism. Deep brain stimulation (DBS) places electrodes that deliver stimulation to the anterior nucleus of the thalamus, which can spread initially localized seizures.

The RNS device consists of a neurostimulator implanted cranially and connected to leads that are placed based on the individual patient’s seizure focus or foci. It also continuously monitors brain activity and delivers stimulation only when its signal suggests the beginning of a seizure.

That capacity for recording is a key benefit because the information can be stored and analyzed, according to Vikram Rao, MD, PhD, a coinvestigator in the real-world trial and an associate professor and the epilepsy division chief at the University of California, San Francisco, which was one of the trial centers. “You know more precisely than we previously did how many seizures a patient is having. Many of our patients are not able to quantify their seizures with perfect accuracy, so we’re better quantifying their seizure burden,” Dr. Rao said in an interview.

The ability to monitor patients can also improve clinical management. Dr. Morrell recounted an elderly patient who for many years has driven 5 hours for appointments. Recently she was able to review his data from the RNS System remotely. She determined that he was doing fine and, after a telephone consultation, told him he didn’t need to come in for a scheduled visit.
 

Real-world analysis

In the real-world analysis, researchers led by Babak Razavi, PhD, and Casey Halpern, MD, at Stanford University conducted a chart review of 150 patients at eight centers who underwent treatment with the RNS system between 2013 and 2018. All patients were followed at least 1 year, with a mean of 2.3 years. Patients had a median of 7.7 disabling seizures per month. The mean value was 52 and the numbers ranged from 0.1 to 3,000. A total of 60% had abnormal brain MRI findings.

At 1 year, subjects achieved a mean 67% decrease in seizure frequency (interquartile range, 50%-94%). At 2 years, that grew to 77%; at 3 or more years, 84%. There was no significant difference in seizure reduction at 1 year according to age, age at epilepsy onset, duration of epilepsy, location of seizure foci, presence of brain MRI abnormalities, prior intracranial monitoring, prior epilepsy surgery, or prior VNS treatment. When patients who underwent a resection at the time of RNS placement were excluded, the results were similar. There were no significant differences in outcome by center.

A total of 11.3% of patients experienced a device-related serious adverse event, and 4% developed infections. The rate of infection was not significantly different between patients who had the neurostimulator and leads implanted alone (3.0%) and patients who had intracranial EEG diagnostic monitoring (ICM) electrodes removed at the same time (6.1%; P = .38).

Although about one-third of the patients who started the long-term study dropped out before completion, most were because the participants moved away from treatment centers, according to Dr. Morrell, and other evidence points squarely to patient satisfaction. “At the end of the battery’s longevity, the neurostimulator needs to be replaced. It’s an outpatient, 45-minute procedure. Over 90% of patients chose to have it replaced. It’s not the answer for everybody, but the substantial majority of patients choose to continue,” she said.
 

Extension trial

The open-label extension trial, led by Dileep Nair, MD, of the Cleveland Clinic Foundation and Dr. Morrell, followed 230 of the 256 patients who participated in 2-year phase 3 study or feasibility studies, extending device usage to 9 years. A total of 162 completed follow-up (mean, 7.5 years). The median reduction of seizure frequency was 58% at the end of year 3, and 75% by year 9 (P < .0001; Wilcoxon signed rank). Although patient population enrichment could have explained this observation, other analyses confirmed that the improvement was real.

Nearly 75% had at least a 50% reduction in seizure frequency; 35% had a 90% or greater reduction in seizure frequency. Some patients (18.4%) had at least a full year with no seizures, and 62% who had a 1-year seizure-free period experienced no seizures at the latest follow-up. Overall, 21% had no seizures in the last 6 months of follow-up.

For those with a seizure-free period of more than 1 year, the average duration was 3.2 years (range, 1.04-9.6 years). There was no difference in response among patients based on previous antiseizure medication use or previous epilepsy surgery, VNS treatment, or intracranial monitoring, and there were no differences by patient age at enrollment, age of seizure onset, brain imaging abnormality, seizure onset locality, or number of foci.

The researchers noted improvement in overall Quality of Life in Epilepsy Inventory–89 scores at 1 year (mean, +3.2; P < .0001), which continued through year 9 (mean, +1.9; P < .05). Improvements were also seen in epilepsy targeted (mean, +4.5; P < .001) and cognitive domains (mean, +2.5; P = .005). Risk of infection was 4.1% per procedure, and 12.1% of subjects overall experienced a serious device-related implant infection. Of 35 infections, 16 led to device removal.

The extension study was funded by NeuroPace. NeuroPace supported data entry and institutional review board submission for the real-world trial. Dr. Morrell owns stock and is an employee of NeuroPace. Dr Rao has received support from and/or consulted for NeuroPace.

SOURCE: Nair DR et al. Neurology. 2020 Jul 20. doi: 10.1212/WNL.0000000000010154. Razavi B et al. Epilepsia. 2020 Jul 13. doi: 10.1111/epi.16593.

Two new long-term studies, one an extension trial and the other an analysis of real-world experience, show that the RNS System direct brain responsive neurostimulator leads to reduction of seizure frequency in most epilepsy patients who had it implanted. Both studies showed that the benefit from the devices increased over time.

That accruing benefit may be because of improved protocols as clinicians gain experience with the device or because of network remodeling that occurs over time as seizures are controlled. “I think it’s both,” said Martha Morrell, MD, a clinical professor of neurology at Stanford (Calif.) University and chief medical officer at NeuroPace, the company that has marketed the device since it gained FDA approval in 2013.

In both studies, the slope of improvement over time was similar, but the real-world study showed greater improvement at the beginning of treatment. “I think the slopes represent physiological changes, but the fact that [the real-world study] starts with better outcomes is, I think, directly attributable to learning. When the long-term study was started in 2004, this had never been done before, and we had to make a highly educated guess about what we should do, and the initial stimulatory parameters were programmed in a way that’s very similar to what was used for movement disorders,” Dr. Morrell said in an interview.

The long-term treatment study appeared online July 20 in the journal Neurology, while the real-world analysis was published July 13 in Epilepsia.
 

An alternative option

Medications can effectively treat some seizures, but 30%-40% of patients must turn to other options for control. Surgery can sometimes be curative, but is not suitable for some patients. Other stimulation devices include vagus nerve stimulation (VNS), which sends pulses from a chest implant to the vagus nerve, reducing epileptic attacks through an unknown mechanism. Deep brain stimulation (DBS) places electrodes that deliver stimulation to the anterior nucleus of the thalamus, which can spread initially localized seizures.

The RNS device consists of a neurostimulator implanted cranially and connected to leads that are placed based on the individual patient’s seizure focus or foci. It also continuously monitors brain activity and delivers stimulation only when its signal suggests the beginning of a seizure.

That capacity for recording is a key benefit because the information can be stored and analyzed, according to Vikram Rao, MD, PhD, a coinvestigator in the real-world trial and an associate professor and the epilepsy division chief at the University of California, San Francisco, which was one of the trial centers. “You know more precisely than we previously did how many seizures a patient is having. Many of our patients are not able to quantify their seizures with perfect accuracy, so we’re better quantifying their seizure burden,” Dr. Rao said in an interview.

The ability to monitor patients can also improve clinical management. Dr. Morrell recounted an elderly patient who for many years has driven 5 hours for appointments. Recently she was able to review his data from the RNS System remotely. She determined that he was doing fine and, after a telephone consultation, told him he didn’t need to come in for a scheduled visit.
 

Real-world analysis

In the real-world analysis, researchers led by Babak Razavi, PhD, and Casey Halpern, MD, at Stanford University conducted a chart review of 150 patients at eight centers who underwent treatment with the RNS system between 2013 and 2018. All patients were followed at least 1 year, with a mean of 2.3 years. Patients had a median of 7.7 disabling seizures per month. The mean value was 52 and the numbers ranged from 0.1 to 3,000. A total of 60% had abnormal brain MRI findings.

At 1 year, subjects achieved a mean 67% decrease in seizure frequency (interquartile range, 50%-94%). At 2 years, that grew to 77%; at 3 or more years, 84%. There was no significant difference in seizure reduction at 1 year according to age, age at epilepsy onset, duration of epilepsy, location of seizure foci, presence of brain MRI abnormalities, prior intracranial monitoring, prior epilepsy surgery, or prior VNS treatment. When patients who underwent a resection at the time of RNS placement were excluded, the results were similar. There were no significant differences in outcome by center.

A total of 11.3% of patients experienced a device-related serious adverse event, and 4% developed infections. The rate of infection was not significantly different between patients who had the neurostimulator and leads implanted alone (3.0%) and patients who had intracranial EEG diagnostic monitoring (ICM) electrodes removed at the same time (6.1%; P = .38).

Although about one-third of the patients who started the long-term study dropped out before completion, most were because the participants moved away from treatment centers, according to Dr. Morrell, and other evidence points squarely to patient satisfaction. “At the end of the battery’s longevity, the neurostimulator needs to be replaced. It’s an outpatient, 45-minute procedure. Over 90% of patients chose to have it replaced. It’s not the answer for everybody, but the substantial majority of patients choose to continue,” she said.
 

Extension trial

The open-label extension trial, led by Dileep Nair, MD, of the Cleveland Clinic Foundation and Dr. Morrell, followed 230 of the 256 patients who participated in 2-year phase 3 study or feasibility studies, extending device usage to 9 years. A total of 162 completed follow-up (mean, 7.5 years). The median reduction of seizure frequency was 58% at the end of year 3, and 75% by year 9 (P < .0001; Wilcoxon signed rank). Although patient population enrichment could have explained this observation, other analyses confirmed that the improvement was real.

Nearly 75% had at least a 50% reduction in seizure frequency; 35% had a 90% or greater reduction in seizure frequency. Some patients (18.4%) had at least a full year with no seizures, and 62% who had a 1-year seizure-free period experienced no seizures at the latest follow-up. Overall, 21% had no seizures in the last 6 months of follow-up.

For those with a seizure-free period of more than 1 year, the average duration was 3.2 years (range, 1.04-9.6 years). There was no difference in response among patients based on previous antiseizure medication use or previous epilepsy surgery, VNS treatment, or intracranial monitoring, and there were no differences by patient age at enrollment, age of seizure onset, brain imaging abnormality, seizure onset locality, or number of foci.

The researchers noted improvement in overall Quality of Life in Epilepsy Inventory–89 scores at 1 year (mean, +3.2; P < .0001), which continued through year 9 (mean, +1.9; P < .05). Improvements were also seen in epilepsy targeted (mean, +4.5; P < .001) and cognitive domains (mean, +2.5; P = .005). Risk of infection was 4.1% per procedure, and 12.1% of subjects overall experienced a serious device-related implant infection. Of 35 infections, 16 led to device removal.

The extension study was funded by NeuroPace. NeuroPace supported data entry and institutional review board submission for the real-world trial. Dr. Morrell owns stock and is an employee of NeuroPace. Dr Rao has received support from and/or consulted for NeuroPace.

SOURCE: Nair DR et al. Neurology. 2020 Jul 20. doi: 10.1212/WNL.0000000000010154. Razavi B et al. Epilepsia. 2020 Jul 13. doi: 10.1111/epi.16593.

Pustular psoriasis is a rare condition that presents significant challenges to clinicians, not least because it comes in varied forms that are not well understood.

It has various dermatologic and rheumatologic manifestations and sometimes overlaps with plaque psoriasis. Pustular palmoplantar psoriasis (PPP) affects the palmar and plantar areas of the skin, while generalized pustular psoriasis (GPP) can affect large areas of skin and tends to be more severe, even life threatening. PPP can accompany psoriatic arthritis or can be a side effect of tumor necrosis factor (TNF) inhibitor therapy, or a non–drug-induced component of rheumatologic syndromes, according to Kristina Callis Duffin, MD, an associate professor and chair of dermatology at the University of Utah, Salt Lake City.

“Each phenotype could be considered an orphan disease, and the response to therapy is often unpredictable,” Dr. Duffin said during a session on pustular psoriasis at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.

But there is some positive news. A study in 2011 of several people with GPP opened the door to better understanding the pathophysiology of pustular psoriasis. Researchers identified a causal autosomal mutation in the IL36RN gene, which encodes an antagonist to the interleukin-36 receptor (Am J Hum Genet. 2011 Sep 9;89[3]:432-7). “As a result of this paper and others, drug development in this space has recently accelerated,” Dr. Duffin said.

In fact, she added,“it’s my opinion that pustular psoriasis is now where plaque psoriasis was 20 years ago, when accelerated drug development was driving a better understanding of the pathogenesis of psoriatic disease and its comorbidities, and also driving outcome measure development.”

In another presentation at the meeting, Hervé Bachelez, MD, PhD, professor of dermatology and immunologist at the University of Paris and Saint-Louis Hospital, Paris, discussed recent advances in drug development for pustular psoriasis. He noted other recent findings of genetic variants related to the disease, including AP1S3, CARD14, and SERPINA3.

For GPP, he said, the current algorithm for management is based on weak evidence for treatments like acitretin, cyclosporine, methotrexate, and infliximab. The story is similar for other biologics, with evidence in the form of case series; open-label studies; controlled, prospective studies; or retrospective analyses. Most of the evidence has been amassed for TNF inhibitors. A retrospective study of all TNF inhibitors suggested they may be effective as induction and maintenance therapy, he noted.

Among IL-17A inhibitors, a prospective study of 12 patients in Japan found secukinumab showed efficacy against GPP, as did studies of ixekizumab and brodalumab. A small phase 3 study in Japan demonstrated efficacy for the IL-23 inhibitor guselkumab in patients with erythrodermic psoriasis and GPP (J Dermatol. 2018 May;45[5]:529-39).

The limited data are a reflection in part of the difficulty in studying GPP, since its flares tend to be more self-remitting than with psoriasis vulgaris or PPP.

There are two monoclonal antibodies against the IL-36 receptor currently being developed. A proof-of-concept study of one of them, spesolimab, showed promise against GPP, with five of seven patients reaching “clear” or “almost clear” scores on the Generalized Pustular Psoriasis Physician Global Assessment within a week after infusion and in all seven by the fourth week (N Engl J Med. 2019 Mar 7;380[10]:981-3).

With respect to PPP, the strongest evidence for conventional therapies comes from two randomized, controlled trials of cyclosporine, with response rates of 48% and 89%, compared with 19% and 21%, respectively, in the placebo groups, although the primary endpoint was poorly designed, according to Dr. Bachelez. Retinoids like etretinate and acitretin, combined with psoralen and UVA, also have some supporting evidence regarding efficacy.

Among biologics, secukinumab did not fare well in a phase 3 study of patients with PPP. A subset of patients may benefit from it, but there are no biomarkers available to identify them, Dr. Bachelez said. A phase 2 study of guselkumab in Japan told a similar story, with only weak signs of efficacy. While there are many more ongoing clinical trials evaluating treatments for PPP, which is encouraging, PPP seems to be more challenging at this stage to tackle than GPP, Dr. Bachelez added. “The genetically inherited IL-36 antagonist abnormalities are clearly driving the advances regarding the pathogenesis of the disease, mainly for GPP rather than PPP.”

Part of the efforts to develop therapies for pustular psoriasis relies on the development of new outcome measures, or adaptation of existing ones. “We have a need to adapt or develop new investigator-reported measures, we need to adapt or develop new patient-reported outcomes,” Dr. Duffin said.

Many existing measures use inconsistent language and anchoring definitions, and some may be proprietary, she added. “The language varies by sponsor and is sometimes tweaked or modified by the agencies. Often synonyms are being used … it raises questions, does it change the validity of the instrument?”

Dr. Duffin called for the research community to use the pause in clinical research during the COVID-19 pandemic to reassess the research agenda, develop consensus on performing and training for GPP and PPP assessments, develop patient-reported outcomes, and strengthen connections to industry.

Dr. Duffin and Dr. Bachelez have consulted, served on the advisory board, been a speaker for, and/or received research support from a wide range of pharmaceutical companies, including those that manufacture and develop psoriasis treatments.
 

Pustular psoriasis is a rare condition that presents significant challenges to clinicians, not least because it comes in varied forms that are not well understood.

It has various dermatologic and rheumatologic manifestations and sometimes overlaps with plaque psoriasis. Pustular palmoplantar psoriasis (PPP) affects the palmar and plantar areas of the skin, while generalized pustular psoriasis (GPP) can affect large areas of skin and tends to be more severe, even life threatening. PPP can accompany psoriatic arthritis or can be a side effect of tumor necrosis factor (TNF) inhibitor therapy, or a non–drug-induced component of rheumatologic syndromes, according to Kristina Callis Duffin, MD, an associate professor and chair of dermatology at the University of Utah, Salt Lake City.

“Each phenotype could be considered an orphan disease, and the response to therapy is often unpredictable,” Dr. Duffin said during a session on pustular psoriasis at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.

But there is some positive news. A study in 2011 of several people with GPP opened the door to better understanding the pathophysiology of pustular psoriasis. Researchers identified a causal autosomal mutation in the IL36RN gene, which encodes an antagonist to the interleukin-36 receptor (Am J Hum Genet. 2011 Sep 9;89[3]:432-7). “As a result of this paper and others, drug development in this space has recently accelerated,” Dr. Duffin said.

In fact, she added,“it’s my opinion that pustular psoriasis is now where plaque psoriasis was 20 years ago, when accelerated drug development was driving a better understanding of the pathogenesis of psoriatic disease and its comorbidities, and also driving outcome measure development.”

In another presentation at the meeting, Hervé Bachelez, MD, PhD, professor of dermatology and immunologist at the University of Paris and Saint-Louis Hospital, Paris, discussed recent advances in drug development for pustular psoriasis. He noted other recent findings of genetic variants related to the disease, including AP1S3, CARD14, and SERPINA3.

For GPP, he said, the current algorithm for management is based on weak evidence for treatments like acitretin, cyclosporine, methotrexate, and infliximab. The story is similar for other biologics, with evidence in the form of case series; open-label studies; controlled, prospective studies; or retrospective analyses. Most of the evidence has been amassed for TNF inhibitors. A retrospective study of all TNF inhibitors suggested they may be effective as induction and maintenance therapy, he noted.

Among IL-17A inhibitors, a prospective study of 12 patients in Japan found secukinumab showed efficacy against GPP, as did studies of ixekizumab and brodalumab. A small phase 3 study in Japan demonstrated efficacy for the IL-23 inhibitor guselkumab in patients with erythrodermic psoriasis and GPP (J Dermatol. 2018 May;45[5]:529-39).

The limited data are a reflection in part of the difficulty in studying GPP, since its flares tend to be more self-remitting than with psoriasis vulgaris or PPP.

There are two monoclonal antibodies against the IL-36 receptor currently being developed. A proof-of-concept study of one of them, spesolimab, showed promise against GPP, with five of seven patients reaching “clear” or “almost clear” scores on the Generalized Pustular Psoriasis Physician Global Assessment within a week after infusion and in all seven by the fourth week (N Engl J Med. 2019 Mar 7;380[10]:981-3).

With respect to PPP, the strongest evidence for conventional therapies comes from two randomized, controlled trials of cyclosporine, with response rates of 48% and 89%, compared with 19% and 21%, respectively, in the placebo groups, although the primary endpoint was poorly designed, according to Dr. Bachelez. Retinoids like etretinate and acitretin, combined with psoralen and UVA, also have some supporting evidence regarding efficacy.

Among biologics, secukinumab did not fare well in a phase 3 study of patients with PPP. A subset of patients may benefit from it, but there are no biomarkers available to identify them, Dr. Bachelez said. A phase 2 study of guselkumab in Japan told a similar story, with only weak signs of efficacy. While there are many more ongoing clinical trials evaluating treatments for PPP, which is encouraging, PPP seems to be more challenging at this stage to tackle than GPP, Dr. Bachelez added. “The genetically inherited IL-36 antagonist abnormalities are clearly driving the advances regarding the pathogenesis of the disease, mainly for GPP rather than PPP.”

Part of the efforts to develop therapies for pustular psoriasis relies on the development of new outcome measures, or adaptation of existing ones. “We have a need to adapt or develop new investigator-reported measures, we need to adapt or develop new patient-reported outcomes,” Dr. Duffin said.

Many existing measures use inconsistent language and anchoring definitions, and some may be proprietary, she added. “The language varies by sponsor and is sometimes tweaked or modified by the agencies. Often synonyms are being used … it raises questions, does it change the validity of the instrument?”

Dr. Duffin called for the research community to use the pause in clinical research during the COVID-19 pandemic to reassess the research agenda, develop consensus on performing and training for GPP and PPP assessments, develop patient-reported outcomes, and strengthen connections to industry.

Dr. Duffin and Dr. Bachelez have consulted, served on the advisory board, been a speaker for, and/or received research support from a wide range of pharmaceutical companies, including those that manufacture and develop psoriasis treatments.
 

Pustular psoriasis is a rare condition that presents significant challenges to clinicians, not least because it comes in varied forms that are not well understood.

It has various dermatologic and rheumatologic manifestations and sometimes overlaps with plaque psoriasis. Pustular palmoplantar psoriasis (PPP) affects the palmar and plantar areas of the skin, while generalized pustular psoriasis (GPP) can affect large areas of skin and tends to be more severe, even life threatening. PPP can accompany psoriatic arthritis or can be a side effect of tumor necrosis factor (TNF) inhibitor therapy, or a non–drug-induced component of rheumatologic syndromes, according to Kristina Callis Duffin, MD, an associate professor and chair of dermatology at the University of Utah, Salt Lake City.

“Each phenotype could be considered an orphan disease, and the response to therapy is often unpredictable,” Dr. Duffin said during a session on pustular psoriasis at the virtual annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.

But there is some positive news. A study in 2011 of several people with GPP opened the door to better understanding the pathophysiology of pustular psoriasis. Researchers identified a causal autosomal mutation in the IL36RN gene, which encodes an antagonist to the interleukin-36 receptor (Am J Hum Genet. 2011 Sep 9;89[3]:432-7). “As a result of this paper and others, drug development in this space has recently accelerated,” Dr. Duffin said.

In fact, she added,“it’s my opinion that pustular psoriasis is now where plaque psoriasis was 20 years ago, when accelerated drug development was driving a better understanding of the pathogenesis of psoriatic disease and its comorbidities, and also driving outcome measure development.”

In another presentation at the meeting, Hervé Bachelez, MD, PhD, professor of dermatology and immunologist at the University of Paris and Saint-Louis Hospital, Paris, discussed recent advances in drug development for pustular psoriasis. He noted other recent findings of genetic variants related to the disease, including AP1S3, CARD14, and SERPINA3.

For GPP, he said, the current algorithm for management is based on weak evidence for treatments like acitretin, cyclosporine, methotrexate, and infliximab. The story is similar for other biologics, with evidence in the form of case series; open-label studies; controlled, prospective studies; or retrospective analyses. Most of the evidence has been amassed for TNF inhibitors. A retrospective study of all TNF inhibitors suggested they may be effective as induction and maintenance therapy, he noted.

Among IL-17A inhibitors, a prospective study of 12 patients in Japan found secukinumab showed efficacy against GPP, as did studies of ixekizumab and brodalumab. A small phase 3 study in Japan demonstrated efficacy for the IL-23 inhibitor guselkumab in patients with erythrodermic psoriasis and GPP (J Dermatol. 2018 May;45[5]:529-39).

The limited data are a reflection in part of the difficulty in studying GPP, since its flares tend to be more self-remitting than with psoriasis vulgaris or PPP.

There are two monoclonal antibodies against the IL-36 receptor currently being developed. A proof-of-concept study of one of them, spesolimab, showed promise against GPP, with five of seven patients reaching “clear” or “almost clear” scores on the Generalized Pustular Psoriasis Physician Global Assessment within a week after infusion and in all seven by the fourth week (N Engl J Med. 2019 Mar 7;380[10]:981-3).

With respect to PPP, the strongest evidence for conventional therapies comes from two randomized, controlled trials of cyclosporine, with response rates of 48% and 89%, compared with 19% and 21%, respectively, in the placebo groups, although the primary endpoint was poorly designed, according to Dr. Bachelez. Retinoids like etretinate and acitretin, combined with psoralen and UVA, also have some supporting evidence regarding efficacy.

Among biologics, secukinumab did not fare well in a phase 3 study of patients with PPP. A subset of patients may benefit from it, but there are no biomarkers available to identify them, Dr. Bachelez said. A phase 2 study of guselkumab in Japan told a similar story, with only weak signs of efficacy. While there are many more ongoing clinical trials evaluating treatments for PPP, which is encouraging, PPP seems to be more challenging at this stage to tackle than GPP, Dr. Bachelez added. “The genetically inherited IL-36 antagonist abnormalities are clearly driving the advances regarding the pathogenesis of the disease, mainly for GPP rather than PPP.”

Part of the efforts to develop therapies for pustular psoriasis relies on the development of new outcome measures, or adaptation of existing ones. “We have a need to adapt or develop new investigator-reported measures, we need to adapt or develop new patient-reported outcomes,” Dr. Duffin said.

Many existing measures use inconsistent language and anchoring definitions, and some may be proprietary, she added. “The language varies by sponsor and is sometimes tweaked or modified by the agencies. Often synonyms are being used … it raises questions, does it change the validity of the instrument?”

Dr. Duffin called for the research community to use the pause in clinical research during the COVID-19 pandemic to reassess the research agenda, develop consensus on performing and training for GPP and PPP assessments, develop patient-reported outcomes, and strengthen connections to industry.

Dr. Duffin and Dr. Bachelez have consulted, served on the advisory board, been a speaker for, and/or received research support from a wide range of pharmaceutical companies, including those that manufacture and develop psoriasis treatments.