Rare Diseases

To the Editor:

Relapsing polychondritis (RP) is a chronic, progressive, and episodic systemic inflammatory disease that primarily affects the cartilaginous structures of the ears and nose. Involvement of other proteoglycan-rich structures such as the joints, eyes, inner ears, blood vessels, heart, and kidneys also may be seen. Dermatologic manifestations occur in 35% to 50% of patients and may be the presenting sign in up to 12% of cases.¹ The most commonly reported dermatologic findings include oral aphthosis, erythema nodosum, and purpura with vasculitic changes. Less commonly reported associations include Sweet syndrome, pyoderma gangrenosum, panniculitis, erythema elevatum diutinum, erythema annulare centrifugum, and erythema multiforme.¹

A 43-year-old woman who was otherwise healthy developed new-onset tenderness and swelling of the left pinna while on vacation. She was treated with trimethoprim-sulfamethoxazole, clindamycin, and levofloxacin for presumed auricular cellulitis. The patient developed a fever; sore throat; and a progressive, pruritic, blistering rash on the face, torso, bilateral extremities, palms, and soles 1 day after completing the antibiotic course. After 5 days of unremitting symptoms despite oral, intramuscular, and topical steroids, the patient presented to the emergency department. Physical examination revealed diffuse, tender, erythematous to violaceous macules with varying degrees of coalescence on the chest, back, and extremities. Scattered flaccid bullae and erosions of the oral and genital mucosa also were seen. Laboratory analysis was notable only for a urinary tract infection with Klebsiella pneumoniae. A punch biopsy demonstrated full-thickness necrosis of the epidermis with subepidermal bullae and a mild to moderate lymphocytic infiltrate with rare eosinophils, consistent with a diagnosis of Stevens-Johnson syndrome (SJS). Because of the body surface area involved (20%) and the recent history of trimethoprim-sulfamethoxazole use, a diagnosis of SJS/toxic epidermal necrolysis (TEN) overlap syndrome was made. The patient was successfully treated with subcutaneous etanercept (50 mg), supportive care, and cephalexin for the urinary tract infection.

Approximately 5 weeks after discharge from the hospital, the patient was evaluated for new-onset pain and swelling of the right ear (Figure) in conjunction with recent tenderness and depression of the superior septal structure of the nose. A punch biopsy of the ear revealed mild perichondral inflammation without vasculitic changes and a superficial, deep perivascular, and periadnexal lymphoplasmacytic inflammatory infiltrate with scattered eosinophils. A diagnosis of RP was made, as the patient met Damiani and Levine’s² criteria with bilateral auricular inflammation, ocular inflammation, and nasal chondritis.

We report a unique case of SJS/TEN overlap syndrome occurring in a patient with RP.¹ Although the association may be coincidental, it is well known that patients with lupus erythematosus are predisposed to the development of SJS and TEN. Therefore, a shared underlying genetic predisposition or immune system hyperactivity secondary to active RP is a possible explanation for our patient’s unique presentation.

To the Editor:

Relapsing polychondritis (RP) is a chronic, progressive, and episodic systemic inflammatory disease that primarily affects the cartilaginous structures of the ears and nose. Involvement of other proteoglycan-rich structures such as the joints, eyes, inner ears, blood vessels, heart, and kidneys also may be seen. Dermatologic manifestations occur in 35% to 50% of patients and may be the presenting sign in up to 12% of cases.¹ The most commonly reported dermatologic findings include oral aphthosis, erythema nodosum, and purpura with vasculitic changes. Less commonly reported associations include Sweet syndrome, pyoderma gangrenosum, panniculitis, erythema elevatum diutinum, erythema annulare centrifugum, and erythema multiforme.¹

A 43-year-old woman who was otherwise healthy developed new-onset tenderness and swelling of the left pinna while on vacation. She was treated with trimethoprim-sulfamethoxazole, clindamycin, and levofloxacin for presumed auricular cellulitis. The patient developed a fever; sore throat; and a progressive, pruritic, blistering rash on the face, torso, bilateral extremities, palms, and soles 1 day after completing the antibiotic course. After 5 days of unremitting symptoms despite oral, intramuscular, and topical steroids, the patient presented to the emergency department. Physical examination revealed diffuse, tender, erythematous to violaceous macules with varying degrees of coalescence on the chest, back, and extremities. Scattered flaccid bullae and erosions of the oral and genital mucosa also were seen. Laboratory analysis was notable only for a urinary tract infection with Klebsiella pneumoniae. A punch biopsy demonstrated full-thickness necrosis of the epidermis with subepidermal bullae and a mild to moderate lymphocytic infiltrate with rare eosinophils, consistent with a diagnosis of Stevens-Johnson syndrome (SJS). Because of the body surface area involved (20%) and the recent history of trimethoprim-sulfamethoxazole use, a diagnosis of SJS/toxic epidermal necrolysis (TEN) overlap syndrome was made. The patient was successfully treated with subcutaneous etanercept (50 mg), supportive care, and cephalexin for the urinary tract infection.

Approximately 5 weeks after discharge from the hospital, the patient was evaluated for new-onset pain and swelling of the right ear (Figure) in conjunction with recent tenderness and depression of the superior septal structure of the nose. A punch biopsy of the ear revealed mild perichondral inflammation without vasculitic changes and a superficial, deep perivascular, and periadnexal lymphoplasmacytic inflammatory infiltrate with scattered eosinophils. A diagnosis of RP was made, as the patient met Damiani and Levine’s² criteria with bilateral auricular inflammation, ocular inflammation, and nasal chondritis.

We report a unique case of SJS/TEN overlap syndrome occurring in a patient with RP.¹ Although the association may be coincidental, it is well known that patients with lupus erythematosus are predisposed to the development of SJS and TEN. Therefore, a shared underlying genetic predisposition or immune system hyperactivity secondary to active RP is a possible explanation for our patient’s unique presentation.

To the Editor:

Relapsing polychondritis (RP) is a chronic, progressive, and episodic systemic inflammatory disease that primarily affects the cartilaginous structures of the ears and nose. Involvement of other proteoglycan-rich structures such as the joints, eyes, inner ears, blood vessels, heart, and kidneys also may be seen. Dermatologic manifestations occur in 35% to 50% of patients and may be the presenting sign in up to 12% of cases.¹ The most commonly reported dermatologic findings include oral aphthosis, erythema nodosum, and purpura with vasculitic changes. Less commonly reported associations include Sweet syndrome, pyoderma gangrenosum, panniculitis, erythema elevatum diutinum, erythema annulare centrifugum, and erythema multiforme.¹

A 43-year-old woman who was otherwise healthy developed new-onset tenderness and swelling of the left pinna while on vacation. She was treated with trimethoprim-sulfamethoxazole, clindamycin, and levofloxacin for presumed auricular cellulitis. The patient developed a fever; sore throat; and a progressive, pruritic, blistering rash on the face, torso, bilateral extremities, palms, and soles 1 day after completing the antibiotic course. After 5 days of unremitting symptoms despite oral, intramuscular, and topical steroids, the patient presented to the emergency department. Physical examination revealed diffuse, tender, erythematous to violaceous macules with varying degrees of coalescence on the chest, back, and extremities. Scattered flaccid bullae and erosions of the oral and genital mucosa also were seen. Laboratory analysis was notable only for a urinary tract infection with Klebsiella pneumoniae. A punch biopsy demonstrated full-thickness necrosis of the epidermis with subepidermal bullae and a mild to moderate lymphocytic infiltrate with rare eosinophils, consistent with a diagnosis of Stevens-Johnson syndrome (SJS). Because of the body surface area involved (20%) and the recent history of trimethoprim-sulfamethoxazole use, a diagnosis of SJS/toxic epidermal necrolysis (TEN) overlap syndrome was made. The patient was successfully treated with subcutaneous etanercept (50 mg), supportive care, and cephalexin for the urinary tract infection.

Approximately 5 weeks after discharge from the hospital, the patient was evaluated for new-onset pain and swelling of the right ear (Figure) in conjunction with recent tenderness and depression of the superior septal structure of the nose. A punch biopsy of the ear revealed mild perichondral inflammation without vasculitic changes and a superficial, deep perivascular, and periadnexal lymphoplasmacytic inflammatory infiltrate with scattered eosinophils. A diagnosis of RP was made, as the patient met Damiani and Levine’s² criteria with bilateral auricular inflammation, ocular inflammation, and nasal chondritis.

We report a unique case of SJS/TEN overlap syndrome occurring in a patient with RP.¹ Although the association may be coincidental, it is well known that patients with lupus erythematosus are predisposed to the development of SJS and TEN. Therefore, a shared underlying genetic predisposition or immune system hyperactivity secondary to active RP is a possible explanation for our patient’s unique presentation.

A gel derived from birch bark is the first topical medication ever tested in the treatment of epidermolysis bullosa (EB) to heal wounds faster than placebo. The results come from the largest double-blind, randomized trial performed in this patient population.

Dr. Dedee Murrell

More than 41% of EB target wounds that were treated with Oleogel-S10 healed within 45 days, compared with about 29% of target wounds treated with placebo, in the EASE phase 3 trial, conducted at 58 sites in 28 countries.

A group of rare genetic disorders, EB “is described as the worst disease you’ve never heard of,” explained lead investigator Dedee Murrell, MD, director of dermatology, St. George Hospital at the University of New South Wales, Sydney. “It starts in children and is like having burns that heal with scars, and no treatment has been approved for it” by the Food and Drug Administration.

“This is the first large clinical trial with placebo of a topical treatment that’s worked for this terrible disease,” Dr. Murrell said in an interview. She noted that standard EB treatment currently consists of applying nonstick dressings to wounds to protect skin from trauma and infection.

Dr. Murrell, who has focused her work on EB patients since 1990, presented the findings at the virtual annual Congress of the European Academy of Dermatology and Venereology.

The trial enrolled 223 patients (average age, 12 years, but ages ranged to 81 years) with three types of EB, including dystrophic and junctional EB and Kindler syndrome. For each participant, a target wound was selected for use as the primary efficacy endpoint. Those wounds had a partial thickness of between 10 cm² and 50 cm² and lasted between 21 days and 9 months. Patients were stratified into groups depending on type of EB and size of target wound.

Participants were randomly assigned to receive either Oleogel-S10 (n = 109) or placebo (n = 114). All applied the blinded-study gel to all their wounds at least every 4 days at the time dressings were changed.

The primary endpoint was the percentage of patients whose target wounds completely closed within 45 days. Key secondary endpoints included time to wound healing and percentage of target wounds that healed within 90 days of treatment; incidence and severity of target wound infection; change in total body wound burden, as measured by the Epidermolysis Bullosa Disease Activity and Scarring Index skin activity subscore; change in itching, as measured by the Itch Man Scale and the Leuven Itch Scale; and adverse events.

Nearly 92% of patients who were treated with Oleogel-S10 completed the double-blind phase of the trial, compared with nearly 87% who received placebo. As noted, the primary endpoint was met, with 41.3% of Oleogel-S10 patients achieving target wound closure within 45 days, compared with 28.9% of the patients who received placebo (P = .013).

But the difference in time to wound healing by day 90 between the two patient groups was not statistically significant (P = .302), with 50.5% of Oleogel-S10 patients achieving wound closure vs. 43.9% of control patients.

Target-wound infection occurred in eight participants, including three who used Oleogel-S10 and five who received placebo; all moderate or severe infections occurred in patients who received placebo. Total wound burden was reduced to a greater extent among Oleogel-S10 patients by day 60, but there was no apparent difference at day 90.

Both treatment groups reported qualitative improvements in itch, with no significant differences between groups. The prevalence of adverse events was also similar between groups (Oleogel-S10, 81.7%; placebo, 80.7%). The most frequently reported adverse events among Oleogel-S10 patients, compared with patients who received placebo, were wound complications, pyrexia, wound infection, pruritus, and anemia; only 4.5% of adverse events were deemed severe.

Dr. Murrell said that, on the basis of the trial results, she expects the FDA to fast-track approval of Oleogel-S10, which contains triterpene extract and sunflower oil.

The gel is “a treatment patients will be able to put under their dressings, added to normal treatment, which will accelerate their wound healing, with no significant increase in any side effects,” she added.

Jemima Mellerio, MD, of St. Thomas’ Hospital in London who sees about 400 EB patients each year, agreed with Dr. Murrell that the results are “very exciting.” Dr. Mellerio was not involved in the study.

“Practicing dermatologists seeing people with EB will have something to offer that appears to speed up wound healing in chronic wounds,” Dr. Mellerio said in an interview. “It’s a positive option rather than just supportive treatment, something that makes a difference to the natural history of wounds.”

She said the trial’s biggest strength was including “such a large cohort of patients.

“It’s extremely difficult to do that kind of study, especially with a placebo-controlled arm and especially in a rare disease,” Dr. Mellerio said. “If you think about the product itself, it’s easy to apply, so it’s not particularly onerous for people to add to their daily regimen of dressings.”

The study was funded by Amryt Pharma. Dr. Murrell is an advisory board member for Amryt Pharma. Dr. Mellerio is a consultant for Amryt Pharma.

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

A gel derived from birch bark is the first topical medication ever tested in the treatment of epidermolysis bullosa (EB) to heal wounds faster than placebo. The results come from the largest double-blind, randomized trial performed in this patient population.

Dr. Dedee Murrell

More than 41% of EB target wounds that were treated with Oleogel-S10 healed within 45 days, compared with about 29% of target wounds treated with placebo, in the EASE phase 3 trial, conducted at 58 sites in 28 countries.

A group of rare genetic disorders, EB “is described as the worst disease you’ve never heard of,” explained lead investigator Dedee Murrell, MD, director of dermatology, St. George Hospital at the University of New South Wales, Sydney. “It starts in children and is like having burns that heal with scars, and no treatment has been approved for it” by the Food and Drug Administration.

“This is the first large clinical trial with placebo of a topical treatment that’s worked for this terrible disease,” Dr. Murrell said in an interview. She noted that standard EB treatment currently consists of applying nonstick dressings to wounds to protect skin from trauma and infection.

Dr. Murrell, who has focused her work on EB patients since 1990, presented the findings at the virtual annual Congress of the European Academy of Dermatology and Venereology.

The trial enrolled 223 patients (average age, 12 years, but ages ranged to 81 years) with three types of EB, including dystrophic and junctional EB and Kindler syndrome. For each participant, a target wound was selected for use as the primary efficacy endpoint. Those wounds had a partial thickness of between 10 cm² and 50 cm² and lasted between 21 days and 9 months. Patients were stratified into groups depending on type of EB and size of target wound.

Participants were randomly assigned to receive either Oleogel-S10 (n = 109) or placebo (n = 114). All applied the blinded-study gel to all their wounds at least every 4 days at the time dressings were changed.

The primary endpoint was the percentage of patients whose target wounds completely closed within 45 days. Key secondary endpoints included time to wound healing and percentage of target wounds that healed within 90 days of treatment; incidence and severity of target wound infection; change in total body wound burden, as measured by the Epidermolysis Bullosa Disease Activity and Scarring Index skin activity subscore; change in itching, as measured by the Itch Man Scale and the Leuven Itch Scale; and adverse events.

Nearly 92% of patients who were treated with Oleogel-S10 completed the double-blind phase of the trial, compared with nearly 87% who received placebo. As noted, the primary endpoint was met, with 41.3% of Oleogel-S10 patients achieving target wound closure within 45 days, compared with 28.9% of the patients who received placebo (P = .013).

But the difference in time to wound healing by day 90 between the two patient groups was not statistically significant (P = .302), with 50.5% of Oleogel-S10 patients achieving wound closure vs. 43.9% of control patients.

Target-wound infection occurred in eight participants, including three who used Oleogel-S10 and five who received placebo; all moderate or severe infections occurred in patients who received placebo. Total wound burden was reduced to a greater extent among Oleogel-S10 patients by day 60, but there was no apparent difference at day 90.

Both treatment groups reported qualitative improvements in itch, with no significant differences between groups. The prevalence of adverse events was also similar between groups (Oleogel-S10, 81.7%; placebo, 80.7%). The most frequently reported adverse events among Oleogel-S10 patients, compared with patients who received placebo, were wound complications, pyrexia, wound infection, pruritus, and anemia; only 4.5% of adverse events were deemed severe.

Dr. Murrell said that, on the basis of the trial results, she expects the FDA to fast-track approval of Oleogel-S10, which contains triterpene extract and sunflower oil.

The gel is “a treatment patients will be able to put under their dressings, added to normal treatment, which will accelerate their wound healing, with no significant increase in any side effects,” she added.

Jemima Mellerio, MD, of St. Thomas’ Hospital in London who sees about 400 EB patients each year, agreed with Dr. Murrell that the results are “very exciting.” Dr. Mellerio was not involved in the study.

“Practicing dermatologists seeing people with EB will have something to offer that appears to speed up wound healing in chronic wounds,” Dr. Mellerio said in an interview. “It’s a positive option rather than just supportive treatment, something that makes a difference to the natural history of wounds.”

She said the trial’s biggest strength was including “such a large cohort of patients.

“It’s extremely difficult to do that kind of study, especially with a placebo-controlled arm and especially in a rare disease,” Dr. Mellerio said. “If you think about the product itself, it’s easy to apply, so it’s not particularly onerous for people to add to their daily regimen of dressings.”

The study was funded by Amryt Pharma. Dr. Murrell is an advisory board member for Amryt Pharma. Dr. Mellerio is a consultant for Amryt Pharma.

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

A gel derived from birch bark is the first topical medication ever tested in the treatment of epidermolysis bullosa (EB) to heal wounds faster than placebo. The results come from the largest double-blind, randomized trial performed in this patient population.

Dr. Dedee Murrell

More than 41% of EB target wounds that were treated with Oleogel-S10 healed within 45 days, compared with about 29% of target wounds treated with placebo, in the EASE phase 3 trial, conducted at 58 sites in 28 countries.

A group of rare genetic disorders, EB “is described as the worst disease you’ve never heard of,” explained lead investigator Dedee Murrell, MD, director of dermatology, St. George Hospital at the University of New South Wales, Sydney. “It starts in children and is like having burns that heal with scars, and no treatment has been approved for it” by the Food and Drug Administration.

“This is the first large clinical trial with placebo of a topical treatment that’s worked for this terrible disease,” Dr. Murrell said in an interview. She noted that standard EB treatment currently consists of applying nonstick dressings to wounds to protect skin from trauma and infection.

Dr. Murrell, who has focused her work on EB patients since 1990, presented the findings at the virtual annual Congress of the European Academy of Dermatology and Venereology.

The trial enrolled 223 patients (average age, 12 years, but ages ranged to 81 years) with three types of EB, including dystrophic and junctional EB and Kindler syndrome. For each participant, a target wound was selected for use as the primary efficacy endpoint. Those wounds had a partial thickness of between 10 cm² and 50 cm² and lasted between 21 days and 9 months. Patients were stratified into groups depending on type of EB and size of target wound.

Participants were randomly assigned to receive either Oleogel-S10 (n = 109) or placebo (n = 114). All applied the blinded-study gel to all their wounds at least every 4 days at the time dressings were changed.

The primary endpoint was the percentage of patients whose target wounds completely closed within 45 days. Key secondary endpoints included time to wound healing and percentage of target wounds that healed within 90 days of treatment; incidence and severity of target wound infection; change in total body wound burden, as measured by the Epidermolysis Bullosa Disease Activity and Scarring Index skin activity subscore; change in itching, as measured by the Itch Man Scale and the Leuven Itch Scale; and adverse events.

Nearly 92% of patients who were treated with Oleogel-S10 completed the double-blind phase of the trial, compared with nearly 87% who received placebo. As noted, the primary endpoint was met, with 41.3% of Oleogel-S10 patients achieving target wound closure within 45 days, compared with 28.9% of the patients who received placebo (P = .013).

But the difference in time to wound healing by day 90 between the two patient groups was not statistically significant (P = .302), with 50.5% of Oleogel-S10 patients achieving wound closure vs. 43.9% of control patients.

Target-wound infection occurred in eight participants, including three who used Oleogel-S10 and five who received placebo; all moderate or severe infections occurred in patients who received placebo. Total wound burden was reduced to a greater extent among Oleogel-S10 patients by day 60, but there was no apparent difference at day 90.

Both treatment groups reported qualitative improvements in itch, with no significant differences between groups. The prevalence of adverse events was also similar between groups (Oleogel-S10, 81.7%; placebo, 80.7%). The most frequently reported adverse events among Oleogel-S10 patients, compared with patients who received placebo, were wound complications, pyrexia, wound infection, pruritus, and anemia; only 4.5% of adverse events were deemed severe.

Dr. Murrell said that, on the basis of the trial results, she expects the FDA to fast-track approval of Oleogel-S10, which contains triterpene extract and sunflower oil.

The gel is “a treatment patients will be able to put under their dressings, added to normal treatment, which will accelerate their wound healing, with no significant increase in any side effects,” she added.

Jemima Mellerio, MD, of St. Thomas’ Hospital in London who sees about 400 EB patients each year, agreed with Dr. Murrell that the results are “very exciting.” Dr. Mellerio was not involved in the study.

“Practicing dermatologists seeing people with EB will have something to offer that appears to speed up wound healing in chronic wounds,” Dr. Mellerio said in an interview. “It’s a positive option rather than just supportive treatment, something that makes a difference to the natural history of wounds.”

She said the trial’s biggest strength was including “such a large cohort of patients.

“It’s extremely difficult to do that kind of study, especially with a placebo-controlled arm and especially in a rare disease,” Dr. Mellerio said. “If you think about the product itself, it’s easy to apply, so it’s not particularly onerous for people to add to their daily regimen of dressings.”

The study was funded by Amryt Pharma. Dr. Murrell is an advisory board member for Amryt Pharma. Dr. Mellerio is a consultant for Amryt Pharma.

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

Long-term treatment with ataluren delays loss of ambulation and may delay decline in pulmonary function in patients with nonsense mutation Duchenne muscular dystrophy (nmDMD), according to study results presented at the 2020 CNS-ICNA Conjoint Meeting, held virtually this year. Because so few patients in the study reached one of the negative pulmonary endpoints, longer follow-up will be needed to assess more conclusively the effect of ataluren on pulmonary function, said Francesco Bibbiani, MD, vice president of clinical development at PTC Therapeutics.

DMD is a rare and fatal neuromuscular disorder that causes progressive muscle weakness. Between 10% and 15% of patients with DMD have a nonsense mutation in the DMD gene. This mutation creates a premature stop codon that prevents the translation of a full-length dystrophin protein. Ataluren is designed to promote readthrough of this premature stop codon, thus enabling the production of a full-length dystrophin protein. An oral formulation of the drug has been approved in several European and South American countries.
 

Comparing treatment and standard of care

Study 019 was a phase 3, multicenter, open-label, long-term safety study of ataluren that enrolled international patients with nmDMD, most of whom had participated previously in a trial of ataluren. Dr. Bibbiani and colleagues conducted a post hoc analysis of Study 019 data to determine whether patients with nmDMD who received ataluren and standard of care for as long as 240 weeks had a different time to loss of ambulation and to decline of pulmonary function, compared with patients who received standard of care alone. Patients who were eligible to participate in Study 019 were male, had nmDMD, and had completed the blinded study drug treatment in a previous PTC-sponsored study. Treatment consisted of two 10-mg/kg doses and one 20-mg/kg dose of ataluren per day.

Dr. Bibbiani and colleagues used participants in the Cooperative International Neuromuscular Research Group Duchenne Natural History Study (CINRG DNHS) as a control group. CINRG DNHS was a prospective, longitudinal study of patients with DMD who received standard of care at 20 centers worldwide from 2006 to 2016. Dr. Bibbiani and colleagues used propensity-score matching to pair participants in this study with participants in Study 019. They matched patients with respect to age at onset of first symptoms, age at initiation of corticosteroid use, duration of deflazacort use, and duration of use of other corticosteroids. These factors are established predictors of disease progression in DMD.

Patients were eligible for inclusion in the post hoc analysis if they had available data for age, loss of ambulation, and the covariates selected for matching. Of 94 Study 019 participants, 60 were eligible for propensity-score matching with participants in CINRG DNHS. Forty-five nonambulatory patients were eligible for matching in the analysis of age at the decline in pulmonary function because data for age at loss of ambulation and for the three pulmonary endpoints measured were available for them. Thus, comparable population sizes were available for each analysis.
 

Treatment delayed disease milestones

Kaplan–Meier analysis indicated that the median age at various disease milestones was higher among patients who received ataluren and standard of care, compared with those who received standard of care alone. The median age at loss of ambulation was 15.5 years for Study 019 participants and 13.3 years for CINRG DNHS patients. The median age at predicted forced vital capacity (FVC) of less than 60% was 18.1 years for Study 019 participants and 15.8 years for CINRG DNHS participants. The median age at predicted FVC of less than 50% was 19.1 years for Study 019 participants and 17.9 years for CINRG DNHS participants. Finally, the median age at FVC of less than 1 L was not calculable for Study 019 participants and 23.8 years for CINRG DNHS participants.

The Study 019 and CINRG DNHS study groups are sponsored by PTC Therapeutics, which developed ataluren. Dr. Bibbiani is an employee of PTC Therapeutics.

[email protected]

SOURCE: McDonald C, et al. CNS-ICNA 2020. Abstract PL69.

Long-term treatment with ataluren delays loss of ambulation and may delay decline in pulmonary function in patients with nonsense mutation Duchenne muscular dystrophy (nmDMD), according to study results presented at the 2020 CNS-ICNA Conjoint Meeting, held virtually this year. Because so few patients in the study reached one of the negative pulmonary endpoints, longer follow-up will be needed to assess more conclusively the effect of ataluren on pulmonary function, said Francesco Bibbiani, MD, vice president of clinical development at PTC Therapeutics.

DMD is a rare and fatal neuromuscular disorder that causes progressive muscle weakness. Between 10% and 15% of patients with DMD have a nonsense mutation in the DMD gene. This mutation creates a premature stop codon that prevents the translation of a full-length dystrophin protein. Ataluren is designed to promote readthrough of this premature stop codon, thus enabling the production of a full-length dystrophin protein. An oral formulation of the drug has been approved in several European and South American countries.
 

Comparing treatment and standard of care

Study 019 was a phase 3, multicenter, open-label, long-term safety study of ataluren that enrolled international patients with nmDMD, most of whom had participated previously in a trial of ataluren. Dr. Bibbiani and colleagues conducted a post hoc analysis of Study 019 data to determine whether patients with nmDMD who received ataluren and standard of care for as long as 240 weeks had a different time to loss of ambulation and to decline of pulmonary function, compared with patients who received standard of care alone. Patients who were eligible to participate in Study 019 were male, had nmDMD, and had completed the blinded study drug treatment in a previous PTC-sponsored study. Treatment consisted of two 10-mg/kg doses and one 20-mg/kg dose of ataluren per day.

Dr. Bibbiani and colleagues used participants in the Cooperative International Neuromuscular Research Group Duchenne Natural History Study (CINRG DNHS) as a control group. CINRG DNHS was a prospective, longitudinal study of patients with DMD who received standard of care at 20 centers worldwide from 2006 to 2016. Dr. Bibbiani and colleagues used propensity-score matching to pair participants in this study with participants in Study 019. They matched patients with respect to age at onset of first symptoms, age at initiation of corticosteroid use, duration of deflazacort use, and duration of use of other corticosteroids. These factors are established predictors of disease progression in DMD.

Patients were eligible for inclusion in the post hoc analysis if they had available data for age, loss of ambulation, and the covariates selected for matching. Of 94 Study 019 participants, 60 were eligible for propensity-score matching with participants in CINRG DNHS. Forty-five nonambulatory patients were eligible for matching in the analysis of age at the decline in pulmonary function because data for age at loss of ambulation and for the three pulmonary endpoints measured were available for them. Thus, comparable population sizes were available for each analysis.
 

Treatment delayed disease milestones

Kaplan–Meier analysis indicated that the median age at various disease milestones was higher among patients who received ataluren and standard of care, compared with those who received standard of care alone. The median age at loss of ambulation was 15.5 years for Study 019 participants and 13.3 years for CINRG DNHS patients. The median age at predicted forced vital capacity (FVC) of less than 60% was 18.1 years for Study 019 participants and 15.8 years for CINRG DNHS participants. The median age at predicted FVC of less than 50% was 19.1 years for Study 019 participants and 17.9 years for CINRG DNHS participants. Finally, the median age at FVC of less than 1 L was not calculable for Study 019 participants and 23.8 years for CINRG DNHS participants.

The Study 019 and CINRG DNHS study groups are sponsored by PTC Therapeutics, which developed ataluren. Dr. Bibbiani is an employee of PTC Therapeutics.

[email protected]

SOURCE: McDonald C, et al. CNS-ICNA 2020. Abstract PL69.

Long-term treatment with ataluren delays loss of ambulation and may delay decline in pulmonary function in patients with nonsense mutation Duchenne muscular dystrophy (nmDMD), according to study results presented at the 2020 CNS-ICNA Conjoint Meeting, held virtually this year. Because so few patients in the study reached one of the negative pulmonary endpoints, longer follow-up will be needed to assess more conclusively the effect of ataluren on pulmonary function, said Francesco Bibbiani, MD, vice president of clinical development at PTC Therapeutics.

DMD is a rare and fatal neuromuscular disorder that causes progressive muscle weakness. Between 10% and 15% of patients with DMD have a nonsense mutation in the DMD gene. This mutation creates a premature stop codon that prevents the translation of a full-length dystrophin protein. Ataluren is designed to promote readthrough of this premature stop codon, thus enabling the production of a full-length dystrophin protein. An oral formulation of the drug has been approved in several European and South American countries.
 

Comparing treatment and standard of care

Study 019 was a phase 3, multicenter, open-label, long-term safety study of ataluren that enrolled international patients with nmDMD, most of whom had participated previously in a trial of ataluren. Dr. Bibbiani and colleagues conducted a post hoc analysis of Study 019 data to determine whether patients with nmDMD who received ataluren and standard of care for as long as 240 weeks had a different time to loss of ambulation and to decline of pulmonary function, compared with patients who received standard of care alone. Patients who were eligible to participate in Study 019 were male, had nmDMD, and had completed the blinded study drug treatment in a previous PTC-sponsored study. Treatment consisted of two 10-mg/kg doses and one 20-mg/kg dose of ataluren per day.

Dr. Bibbiani and colleagues used participants in the Cooperative International Neuromuscular Research Group Duchenne Natural History Study (CINRG DNHS) as a control group. CINRG DNHS was a prospective, longitudinal study of patients with DMD who received standard of care at 20 centers worldwide from 2006 to 2016. Dr. Bibbiani and colleagues used propensity-score matching to pair participants in this study with participants in Study 019. They matched patients with respect to age at onset of first symptoms, age at initiation of corticosteroid use, duration of deflazacort use, and duration of use of other corticosteroids. These factors are established predictors of disease progression in DMD.

Patients were eligible for inclusion in the post hoc analysis if they had available data for age, loss of ambulation, and the covariates selected for matching. Of 94 Study 019 participants, 60 were eligible for propensity-score matching with participants in CINRG DNHS. Forty-five nonambulatory patients were eligible for matching in the analysis of age at the decline in pulmonary function because data for age at loss of ambulation and for the three pulmonary endpoints measured were available for them. Thus, comparable population sizes were available for each analysis.
 

Treatment delayed disease milestones

Kaplan–Meier analysis indicated that the median age at various disease milestones was higher among patients who received ataluren and standard of care, compared with those who received standard of care alone. The median age at loss of ambulation was 15.5 years for Study 019 participants and 13.3 years for CINRG DNHS patients. The median age at predicted forced vital capacity (FVC) of less than 60% was 18.1 years for Study 019 participants and 15.8 years for CINRG DNHS participants. The median age at predicted FVC of less than 50% was 19.1 years for Study 019 participants and 17.9 years for CINRG DNHS participants. Finally, the median age at FVC of less than 1 L was not calculable for Study 019 participants and 23.8 years for CINRG DNHS participants.

The Study 019 and CINRG DNHS study groups are sponsored by PTC Therapeutics, which developed ataluren. Dr. Bibbiani is an employee of PTC Therapeutics.

[email protected]

SOURCE: McDonald C, et al. CNS-ICNA 2020. Abstract PL69.

Abatacept’s safety as well as indicators of its potential efficacy in the treatment of patients with early diffuse cutaneous systemic sclerosis (dcSSc) were reinforced by newly reported results from the 6-month, open-label extension of the phase 2 ASSET trial.

“Exploratory outcome measures during the open-label extension, including the composite ACR CRISS [American College of Rheumatology Combined Response Index in diffuse cutaneous Systemic Sclerosis] score, indicate that abatacept [Orencia] might promote overall global improvement in these participants,” Lorinda Chung, MD, of Stanford (Calif.) University, and colleagues wrote in the Lancet Rheumatology.

To continue to determine the safety and efficacy of abatacept as a treatment for dcSSc, the researchers launched the open-label extension of the randomized, double-blind ASSET trial. After patients in ASSET completed 12 months of treatment with either 125 mg weekly of subcutaneous abatacept or placebo, they were invited to join the extension period. ASSET’s primary endpoint was the change in modified Rodnan Skin Score (mRSS) from baseline to 12 months.

Of the 88 patients who began the ASSET trial – half of which were assigned to the abatacept group and the other half to the placebo group – 33 and 34 transitioned to weekly open-label treatment with 125 mg of abatacept, respectively. In the trial’s primary endpoint at 12 months, mean improvement in mRSS with abatacept was –6.6 (standard deviation, 6.4), compared to –3.7 (SD, 7.6) with placebo.

All told, 32 patients in each group completed 18 months of treatment. Patients who received abatacept in both periods had even more improvement in mRSS score (–9.8 [SD, 8.1]), as did patients who received placebo and then abatacept (–6.3 [SD, 9.3]). After 12 months, 68% of patients (23 of 34) in the abatacept group had a 5-unit or greater improvement in mRSS, compared with 50% of patients (19 of 38) in the placebo group. After 18 months, that percentage went up to 72% (23 of 32) among patients who took abatacept in both periods and 65% (20 of 31) for those who received it only in the extension.

Although the median ACR CRISS score was significantly greater at 12 months with abatacept, compared with placebo, both groups improved during the open-label period. After 12 months, an ACR CRISS score of 0.60 or higher was achieved by 55% (18 of 33) of the abatacept group and 36% (13 of 36) of the placebo group. In the extension, those percentages leapt to 66% (19 of 29) and 50% (13 of 26), respectively.

Throughout the double-blind phase, adverse events – including infectious events, serious events, and those that led to study withdrawal – were more frequent with placebo than with abatacept. During the extension period, although adverse events occurred slightly more among 18-month abatacept users, they ultimately occurred in fewer participants than in the double-blind phase.

Time to push forward with additional studies on abatacept

The results fortified by this open-label extension from Dr. Chung and colleagues should lay the groundwork for a phase 3 study on treatment with abatacept, wrote Francesco Del Galdo, MD, PhD, of the University of Leeds (England), in an accompanying editorial.

Along with clinically important improvements in several key measures, Dr. Del Galdo restated the value of abatacept’s “very benign” safety profile over the 18-month study period. However, he also acknowledged the “absence of concurrent immunosuppression” in the ASSET trial, noting that there is not yet a record of combination therapy safety across the board.

Beyond safety, he wondered if perhaps the time has passed for a placebo arm in dcSSc patients. He noted that participants in the initial placebo group were more likely to have “clinically relevant worsening of disease that required escape treatment,” which could make it ethically and analytically difficult to justify placebo.

The authors acknowledged the extension’s limitations, including the possibility that the survivors of the 12-month trial who joined the extension were more responsive to treatment or suffered from less severe disease. In addition, they noted that the study “was not powered for formal statistical comparison of the two treatment arms,” meaning all open-label results are considered exploratory. Finally, the number of participants in the extension period was small and likely contributed to low rates of adverse events, such as infection.

The trial was funded by Bristol-Myers Squibb, which markets abatacept, and the National Institutes of Health. The authors reported numerous potential conflicts of interest, including receiving grants, clinical trial support, and personal fees from various organizations and pharmaceutical companies, as well as serving on the advisory boards for such companies. Dr. Del Galdo reported receiving consultancy fees and research grants from several pharmaceutical companies.

SOURCE: Chung L et al. Lancet Rheumatol. 2020 Oct 19. doi: 10.1016/S2665-9913(20)30237-X.

Abatacept’s safety as well as indicators of its potential efficacy in the treatment of patients with early diffuse cutaneous systemic sclerosis (dcSSc) were reinforced by newly reported results from the 6-month, open-label extension of the phase 2 ASSET trial.

“Exploratory outcome measures during the open-label extension, including the composite ACR CRISS [American College of Rheumatology Combined Response Index in diffuse cutaneous Systemic Sclerosis] score, indicate that abatacept [Orencia] might promote overall global improvement in these participants,” Lorinda Chung, MD, of Stanford (Calif.) University, and colleagues wrote in the Lancet Rheumatology.

To continue to determine the safety and efficacy of abatacept as a treatment for dcSSc, the researchers launched the open-label extension of the randomized, double-blind ASSET trial. After patients in ASSET completed 12 months of treatment with either 125 mg weekly of subcutaneous abatacept or placebo, they were invited to join the extension period. ASSET’s primary endpoint was the change in modified Rodnan Skin Score (mRSS) from baseline to 12 months.

Of the 88 patients who began the ASSET trial – half of which were assigned to the abatacept group and the other half to the placebo group – 33 and 34 transitioned to weekly open-label treatment with 125 mg of abatacept, respectively. In the trial’s primary endpoint at 12 months, mean improvement in mRSS with abatacept was –6.6 (standard deviation, 6.4), compared to –3.7 (SD, 7.6) with placebo.

All told, 32 patients in each group completed 18 months of treatment. Patients who received abatacept in both periods had even more improvement in mRSS score (–9.8 [SD, 8.1]), as did patients who received placebo and then abatacept (–6.3 [SD, 9.3]). After 12 months, 68% of patients (23 of 34) in the abatacept group had a 5-unit or greater improvement in mRSS, compared with 50% of patients (19 of 38) in the placebo group. After 18 months, that percentage went up to 72% (23 of 32) among patients who took abatacept in both periods and 65% (20 of 31) for those who received it only in the extension.

Although the median ACR CRISS score was significantly greater at 12 months with abatacept, compared with placebo, both groups improved during the open-label period. After 12 months, an ACR CRISS score of 0.60 or higher was achieved by 55% (18 of 33) of the abatacept group and 36% (13 of 36) of the placebo group. In the extension, those percentages leapt to 66% (19 of 29) and 50% (13 of 26), respectively.

Throughout the double-blind phase, adverse events – including infectious events, serious events, and those that led to study withdrawal – were more frequent with placebo than with abatacept. During the extension period, although adverse events occurred slightly more among 18-month abatacept users, they ultimately occurred in fewer participants than in the double-blind phase.

Time to push forward with additional studies on abatacept

The results fortified by this open-label extension from Dr. Chung and colleagues should lay the groundwork for a phase 3 study on treatment with abatacept, wrote Francesco Del Galdo, MD, PhD, of the University of Leeds (England), in an accompanying editorial.

Along with clinically important improvements in several key measures, Dr. Del Galdo restated the value of abatacept’s “very benign” safety profile over the 18-month study period. However, he also acknowledged the “absence of concurrent immunosuppression” in the ASSET trial, noting that there is not yet a record of combination therapy safety across the board.

Beyond safety, he wondered if perhaps the time has passed for a placebo arm in dcSSc patients. He noted that participants in the initial placebo group were more likely to have “clinically relevant worsening of disease that required escape treatment,” which could make it ethically and analytically difficult to justify placebo.

The authors acknowledged the extension’s limitations, including the possibility that the survivors of the 12-month trial who joined the extension were more responsive to treatment or suffered from less severe disease. In addition, they noted that the study “was not powered for formal statistical comparison of the two treatment arms,” meaning all open-label results are considered exploratory. Finally, the number of participants in the extension period was small and likely contributed to low rates of adverse events, such as infection.

The trial was funded by Bristol-Myers Squibb, which markets abatacept, and the National Institutes of Health. The authors reported numerous potential conflicts of interest, including receiving grants, clinical trial support, and personal fees from various organizations and pharmaceutical companies, as well as serving on the advisory boards for such companies. Dr. Del Galdo reported receiving consultancy fees and research grants from several pharmaceutical companies.

SOURCE: Chung L et al. Lancet Rheumatol. 2020 Oct 19. doi: 10.1016/S2665-9913(20)30237-X.

Abatacept’s safety as well as indicators of its potential efficacy in the treatment of patients with early diffuse cutaneous systemic sclerosis (dcSSc) were reinforced by newly reported results from the 6-month, open-label extension of the phase 2 ASSET trial.

“Exploratory outcome measures during the open-label extension, including the composite ACR CRISS [American College of Rheumatology Combined Response Index in diffuse cutaneous Systemic Sclerosis] score, indicate that abatacept [Orencia] might promote overall global improvement in these participants,” Lorinda Chung, MD, of Stanford (Calif.) University, and colleagues wrote in the Lancet Rheumatology.

To continue to determine the safety and efficacy of abatacept as a treatment for dcSSc, the researchers launched the open-label extension of the randomized, double-blind ASSET trial. After patients in ASSET completed 12 months of treatment with either 125 mg weekly of subcutaneous abatacept or placebo, they were invited to join the extension period. ASSET’s primary endpoint was the change in modified Rodnan Skin Score (mRSS) from baseline to 12 months.

Of the 88 patients who began the ASSET trial – half of which were assigned to the abatacept group and the other half to the placebo group – 33 and 34 transitioned to weekly open-label treatment with 125 mg of abatacept, respectively. In the trial’s primary endpoint at 12 months, mean improvement in mRSS with abatacept was –6.6 (standard deviation, 6.4), compared to –3.7 (SD, 7.6) with placebo.

All told, 32 patients in each group completed 18 months of treatment. Patients who received abatacept in both periods had even more improvement in mRSS score (–9.8 [SD, 8.1]), as did patients who received placebo and then abatacept (–6.3 [SD, 9.3]). After 12 months, 68% of patients (23 of 34) in the abatacept group had a 5-unit or greater improvement in mRSS, compared with 50% of patients (19 of 38) in the placebo group. After 18 months, that percentage went up to 72% (23 of 32) among patients who took abatacept in both periods and 65% (20 of 31) for those who received it only in the extension.

Although the median ACR CRISS score was significantly greater at 12 months with abatacept, compared with placebo, both groups improved during the open-label period. After 12 months, an ACR CRISS score of 0.60 or higher was achieved by 55% (18 of 33) of the abatacept group and 36% (13 of 36) of the placebo group. In the extension, those percentages leapt to 66% (19 of 29) and 50% (13 of 26), respectively.

Throughout the double-blind phase, adverse events – including infectious events, serious events, and those that led to study withdrawal – were more frequent with placebo than with abatacept. During the extension period, although adverse events occurred slightly more among 18-month abatacept users, they ultimately occurred in fewer participants than in the double-blind phase.

Time to push forward with additional studies on abatacept

The results fortified by this open-label extension from Dr. Chung and colleagues should lay the groundwork for a phase 3 study on treatment with abatacept, wrote Francesco Del Galdo, MD, PhD, of the University of Leeds (England), in an accompanying editorial.

Along with clinically important improvements in several key measures, Dr. Del Galdo restated the value of abatacept’s “very benign” safety profile over the 18-month study period. However, he also acknowledged the “absence of concurrent immunosuppression” in the ASSET trial, noting that there is not yet a record of combination therapy safety across the board.

Beyond safety, he wondered if perhaps the time has passed for a placebo arm in dcSSc patients. He noted that participants in the initial placebo group were more likely to have “clinically relevant worsening of disease that required escape treatment,” which could make it ethically and analytically difficult to justify placebo.

The authors acknowledged the extension’s limitations, including the possibility that the survivors of the 12-month trial who joined the extension were more responsive to treatment or suffered from less severe disease. In addition, they noted that the study “was not powered for formal statistical comparison of the two treatment arms,” meaning all open-label results are considered exploratory. Finally, the number of participants in the extension period was small and likely contributed to low rates of adverse events, such as infection.

The trial was funded by Bristol-Myers Squibb, which markets abatacept, and the National Institutes of Health. The authors reported numerous potential conflicts of interest, including receiving grants, clinical trial support, and personal fees from various organizations and pharmaceutical companies, as well as serving on the advisory boards for such companies. Dr. Del Galdo reported receiving consultancy fees and research grants from several pharmaceutical companies.

SOURCE: Chung L et al. Lancet Rheumatol. 2020 Oct 19. doi: 10.1016/S2665-9913(20)30237-X.

Children with juvenile idiopathic arthritis–associated uveitis (JIA-U) are significantly more likely to experience a flare in their eye disease if their arthritis is also worsening, a team of U.S.-based researchers has found.

Jonathan Trobe, M.D./Wikimedia Commons/CC BY-SA 3.0

In a longitudinal cohort study, children with active arthritis at the time of a routine rheumatology assessment had an almost 2.5-fold increased risk of also having active uveitis 45 days before or after the assessment than did children whose arthritis was not flaring at the rheumatology assessment.

“We demonstrate that the two diseases often run parallel courses,” corresponding author Emily J. Liebling, MD, of the Children’s Hospital of Philadelphia and associates state in Arthritis Care & Research, noting that the magnitude of the association is striking.

“Although there are known risk factors associated with uveitis development in children with JIA, less data are available about factors associated with uveitis flare or activity,” said Sheila T. Angeles-Han, MD, MSc, of the departments of pediatrics and ophthalmology at Cincinnati Children’s Hospital Medical Center who commented on the study in an interview.

“If proven, this knowledge has the potential to impact practice patterns and current guidelines wherein a pediatric rheumatologist who evaluates a child with JIA-associated uveitis and finds active arthritis would request an expedited ophthalmic examination,” Dr. Angeles-Han suggested.

Dr. Angeles-Han led the development of the first American College of Rheumatology/Arthritis Foundation Guideline for the Screening, Monitoring, and Treatment of JIA-Associated Uveitis, which recommends regular screening for uveitis in all children with JIA. Children found to have uveitis should then be screened at least every 3 months, and more frequently if they are taking glucocorticoids and treatment is being tapered.

JIA-associated uveitis accounts for around 20%-40% of all cases of noninfectious childhood eye inflammation, and it can run an insidious and chronic course.

“Children with acute anterior uveitis are symptomatic and tend to have a painful red eye, thus prompting an ophthalmic evaluation,” Dr. Angeles-Han explained. “This is different from children with chronic anterior uveitis who tend not to have any symptoms, thus a screening examination is critical to detect ocular inflammation.”

While the ACR/AF guideline distinguishes between acute and chronic uveitis, Dr. Liebling and colleagues explain that they did not because their experience shows that “even patients with chronic anterior uveitis, typically thought to have silent disease, may exhibit symptoms of eye pain, redness, vision changes, and photophobia.”

Conversely, they say “the JIA subtypes usually associated with acute anterior uveitis may instead manifest as asymptomatic eye disease.”

For their study, Dr. Liebling and coinvestigators examined the records of children seen at the Children’s Hospital of Philadelphia over a 6.5-year period. For inclusion, children had to have a physician diagnosis of JIA of any subtype and a history of uveitis.

A total of 98 children were included in the retrospective evaluation; the median age at diagnosis of JIA was 3.3 years, and the median age at first uveitis diagnosis was 5.1 years. The majority (82%) were female, 69% were antinuclear antibody (ANA) positive, and 60% had oligoarthritis – all of which have been associated with having a higher risk for developing uveitis.

However, independent of these and several other factors, the probability of having active uveitis within 45 days of a rheumatology assessment was 65% in those with active arthritis versus 42% for those with no active joints.

Their data are based on 1,229 rheumatology visits that occurred between 2013 and 2019, with a median of 13 visits per patient. Overall, arthritis was defined as being active in 17% of visits, and active uveitis was observed in 18% of rheumatology visits.

Concordance between arthritis and uveitis activity was observed 73% of the time, the researchers reported. A sensitivity analysis that excluded children with the enthesitis-related arthritis subtype of JIA, who may not undergo frequent eye exams, did not change their findings.

Decreased odds of active uveitis at any time point were seen with the use of combination biologic and nonbiologic disease-modifying antirheumatic drugs. Years from uveitis diagnosis was also associated with lower odds of active uveitis over time.

Other factors associated with lower odds of uveitis were female sex, HLA-B27 positivity, and having any subtype of JIA other than the oligoarticular subtype.

Dr. Liebling and coinvestigators concluded that, contrary to the historical dogma, arthritis and uveitis do not run distinct and unrelated courses: “In patients with JIA-U, there is a significant temporal association between arthritis and uveitis disease activity.”

The study was sponsored by the Children’s Hospital of Philadelphia Rheumatology Research Fund. The investigators for the study had no financial support from commercial sources or any other potential conflicts of interest. Dr. Angeles-Han had no conflicts of interest to disclose.

SOURCE: Liebling EJ et al. Arthritis Care Res. 2020 Oct 12. doi: 10.1002/acr.24483.

Children with juvenile idiopathic arthritis–associated uveitis (JIA-U) are significantly more likely to experience a flare in their eye disease if their arthritis is also worsening, a team of U.S.-based researchers has found.

Jonathan Trobe, M.D./Wikimedia Commons/CC BY-SA 3.0

In a longitudinal cohort study, children with active arthritis at the time of a routine rheumatology assessment had an almost 2.5-fold increased risk of also having active uveitis 45 days before or after the assessment than did children whose arthritis was not flaring at the rheumatology assessment.

“We demonstrate that the two diseases often run parallel courses,” corresponding author Emily J. Liebling, MD, of the Children’s Hospital of Philadelphia and associates state in Arthritis Care & Research, noting that the magnitude of the association is striking.

“Although there are known risk factors associated with uveitis development in children with JIA, less data are available about factors associated with uveitis flare or activity,” said Sheila T. Angeles-Han, MD, MSc, of the departments of pediatrics and ophthalmology at Cincinnati Children’s Hospital Medical Center who commented on the study in an interview.

“If proven, this knowledge has the potential to impact practice patterns and current guidelines wherein a pediatric rheumatologist who evaluates a child with JIA-associated uveitis and finds active arthritis would request an expedited ophthalmic examination,” Dr. Angeles-Han suggested.

Dr. Angeles-Han led the development of the first American College of Rheumatology/Arthritis Foundation Guideline for the Screening, Monitoring, and Treatment of JIA-Associated Uveitis, which recommends regular screening for uveitis in all children with JIA. Children found to have uveitis should then be screened at least every 3 months, and more frequently if they are taking glucocorticoids and treatment is being tapered.

JIA-associated uveitis accounts for around 20%-40% of all cases of noninfectious childhood eye inflammation, and it can run an insidious and chronic course.

“Children with acute anterior uveitis are symptomatic and tend to have a painful red eye, thus prompting an ophthalmic evaluation,” Dr. Angeles-Han explained. “This is different from children with chronic anterior uveitis who tend not to have any symptoms, thus a screening examination is critical to detect ocular inflammation.”

While the ACR/AF guideline distinguishes between acute and chronic uveitis, Dr. Liebling and colleagues explain that they did not because their experience shows that “even patients with chronic anterior uveitis, typically thought to have silent disease, may exhibit symptoms of eye pain, redness, vision changes, and photophobia.”

Conversely, they say “the JIA subtypes usually associated with acute anterior uveitis may instead manifest as asymptomatic eye disease.”

For their study, Dr. Liebling and coinvestigators examined the records of children seen at the Children’s Hospital of Philadelphia over a 6.5-year period. For inclusion, children had to have a physician diagnosis of JIA of any subtype and a history of uveitis.

A total of 98 children were included in the retrospective evaluation; the median age at diagnosis of JIA was 3.3 years, and the median age at first uveitis diagnosis was 5.1 years. The majority (82%) were female, 69% were antinuclear antibody (ANA) positive, and 60% had oligoarthritis – all of which have been associated with having a higher risk for developing uveitis.

However, independent of these and several other factors, the probability of having active uveitis within 45 days of a rheumatology assessment was 65% in those with active arthritis versus 42% for those with no active joints.

Their data are based on 1,229 rheumatology visits that occurred between 2013 and 2019, with a median of 13 visits per patient. Overall, arthritis was defined as being active in 17% of visits, and active uveitis was observed in 18% of rheumatology visits.

Concordance between arthritis and uveitis activity was observed 73% of the time, the researchers reported. A sensitivity analysis that excluded children with the enthesitis-related arthritis subtype of JIA, who may not undergo frequent eye exams, did not change their findings.

Decreased odds of active uveitis at any time point were seen with the use of combination biologic and nonbiologic disease-modifying antirheumatic drugs. Years from uveitis diagnosis was also associated with lower odds of active uveitis over time.

Other factors associated with lower odds of uveitis were female sex, HLA-B27 positivity, and having any subtype of JIA other than the oligoarticular subtype.

Dr. Liebling and coinvestigators concluded that, contrary to the historical dogma, arthritis and uveitis do not run distinct and unrelated courses: “In patients with JIA-U, there is a significant temporal association between arthritis and uveitis disease activity.”

The study was sponsored by the Children’s Hospital of Philadelphia Rheumatology Research Fund. The investigators for the study had no financial support from commercial sources or any other potential conflicts of interest. Dr. Angeles-Han had no conflicts of interest to disclose.

SOURCE: Liebling EJ et al. Arthritis Care Res. 2020 Oct 12. doi: 10.1002/acr.24483.

Children with juvenile idiopathic arthritis–associated uveitis (JIA-U) are significantly more likely to experience a flare in their eye disease if their arthritis is also worsening, a team of U.S.-based researchers has found.

Jonathan Trobe, M.D./Wikimedia Commons/CC BY-SA 3.0

In a longitudinal cohort study, children with active arthritis at the time of a routine rheumatology assessment had an almost 2.5-fold increased risk of also having active uveitis 45 days before or after the assessment than did children whose arthritis was not flaring at the rheumatology assessment.

“We demonstrate that the two diseases often run parallel courses,” corresponding author Emily J. Liebling, MD, of the Children’s Hospital of Philadelphia and associates state in Arthritis Care & Research, noting that the magnitude of the association is striking.

“Although there are known risk factors associated with uveitis development in children with JIA, less data are available about factors associated with uveitis flare or activity,” said Sheila T. Angeles-Han, MD, MSc, of the departments of pediatrics and ophthalmology at Cincinnati Children’s Hospital Medical Center who commented on the study in an interview.

“If proven, this knowledge has the potential to impact practice patterns and current guidelines wherein a pediatric rheumatologist who evaluates a child with JIA-associated uveitis and finds active arthritis would request an expedited ophthalmic examination,” Dr. Angeles-Han suggested.

Dr. Angeles-Han led the development of the first American College of Rheumatology/Arthritis Foundation Guideline for the Screening, Monitoring, and Treatment of JIA-Associated Uveitis, which recommends regular screening for uveitis in all children with JIA. Children found to have uveitis should then be screened at least every 3 months, and more frequently if they are taking glucocorticoids and treatment is being tapered.

JIA-associated uveitis accounts for around 20%-40% of all cases of noninfectious childhood eye inflammation, and it can run an insidious and chronic course.

“Children with acute anterior uveitis are symptomatic and tend to have a painful red eye, thus prompting an ophthalmic evaluation,” Dr. Angeles-Han explained. “This is different from children with chronic anterior uveitis who tend not to have any symptoms, thus a screening examination is critical to detect ocular inflammation.”

While the ACR/AF guideline distinguishes between acute and chronic uveitis, Dr. Liebling and colleagues explain that they did not because their experience shows that “even patients with chronic anterior uveitis, typically thought to have silent disease, may exhibit symptoms of eye pain, redness, vision changes, and photophobia.”

Conversely, they say “the JIA subtypes usually associated with acute anterior uveitis may instead manifest as asymptomatic eye disease.”

For their study, Dr. Liebling and coinvestigators examined the records of children seen at the Children’s Hospital of Philadelphia over a 6.5-year period. For inclusion, children had to have a physician diagnosis of JIA of any subtype and a history of uveitis.

A total of 98 children were included in the retrospective evaluation; the median age at diagnosis of JIA was 3.3 years, and the median age at first uveitis diagnosis was 5.1 years. The majority (82%) were female, 69% were antinuclear antibody (ANA) positive, and 60% had oligoarthritis – all of which have been associated with having a higher risk for developing uveitis.

However, independent of these and several other factors, the probability of having active uveitis within 45 days of a rheumatology assessment was 65% in those with active arthritis versus 42% for those with no active joints.

Their data are based on 1,229 rheumatology visits that occurred between 2013 and 2019, with a median of 13 visits per patient. Overall, arthritis was defined as being active in 17% of visits, and active uveitis was observed in 18% of rheumatology visits.

Concordance between arthritis and uveitis activity was observed 73% of the time, the researchers reported. A sensitivity analysis that excluded children with the enthesitis-related arthritis subtype of JIA, who may not undergo frequent eye exams, did not change their findings.

Decreased odds of active uveitis at any time point were seen with the use of combination biologic and nonbiologic disease-modifying antirheumatic drugs. Years from uveitis diagnosis was also associated with lower odds of active uveitis over time.

Other factors associated with lower odds of uveitis were female sex, HLA-B27 positivity, and having any subtype of JIA other than the oligoarticular subtype.

Dr. Liebling and coinvestigators concluded that, contrary to the historical dogma, arthritis and uveitis do not run distinct and unrelated courses: “In patients with JIA-U, there is a significant temporal association between arthritis and uveitis disease activity.”

The study was sponsored by the Children’s Hospital of Philadelphia Rheumatology Research Fund. The investigators for the study had no financial support from commercial sources or any other potential conflicts of interest. Dr. Angeles-Han had no conflicts of interest to disclose.

SOURCE: Liebling EJ et al. Arthritis Care Res. 2020 Oct 12. doi: 10.1002/acr.24483.

Nusinersen provides continued, long-term benefits to infants with spinal muscular atrophy (SMA) who begin treatment before symptom onset, according to an analysis presented at the 2020 CNS-ICNA Conjoint Meeting, held virtually this year.

“Children are developing in a manner more consistent with normal development than that expected for children with two and three SMN2 gene copies,” said Russell Chin, MD, a neurologist at New York–Presbyterian Hospital. “These data demonstrate the durability of effect over a median of 3.8 years of follow-up, with children aged 2.8-4.8 years at the last visit.”

Many participants in the study achieved motor milestones within normal time limits, and no participant lost any major motor milestones. The investigators did not identify any new safety concerns during a maximum of 4.7 years of follow-up. They will follow participants until they reach approximately 8 years of age.
 

An ongoing open-label study

Dr. Chin presented interim results of the ongoing NURTURE study, which is examining the efficacy and safety of intrathecal nusinersen when administered to presymptomatic infants with SMA. The open-label, single-arm, phase 2 study is being conducted in various countries. Eligible participants were 6 weeks old or younger at first dose and had two or three copies of SMN2. The primary end point of NURTURE is time to death or respiratory intervention (i.e., invasive or noninvasive ventilation for 6 or more hours per day continuously for 7 or more days or tracheostomy). The natural history of SMA type 1 indicates that the median age at death or requirement for ventilation support is 13.5 months.

The investigators enrolled 25 infants: 15 with two copies of the gene and 10 with three copies. At the February 2020 interim analysis, participants had been in the study for 3.8 years and were aged 2.8-4.8 years at the last visit. No children had discontinued treatment or withdrawn from the study. All participants are alive, and four participants (all of whom have two copies of SMN2) required respiratory intervention. The latter children initiated respiratory support during an acute reversible illness. No subjects have required permanent ventilation, which the investigators define as ventilation for 16 or more hours per day for more than 21 days in the absence of an acute reversible event, or tracheostomy.
 

Treatment improved motor development

Approximately 84% of children achieved a maximum score on the Children’s Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP INTEND) scale. The population’s mean CHOP INTEND score increased steadily from baseline and stabilized at approximately the maximum score of 64. The population’s mean change in CHOP INTEND score from baseline to last visit was 13.6 points. The mean score at last visit was 62.0 among patients with two copies of SMN2 and 63.4 among patients with three copies. In addition, the time to first achievement of maximum CHOP INTEND score was shorter in participants with three copies of SMN2, compared with those with two. Four participants with two copies of the gene have not yet achieved a maximum CHOP INTEND score.

Many of the children in the study achieved World Health Organization motor milestones within time frames consistent with normal development. About 84% of participants became able to sit without support within the normal time frame in healthy children. Approximately 60% of children achieved walking with assistance within the normal window, and 64% achieved walking alone within the normal window. Of 25 participants, 24 are walking with assistance, and 22 of 25 (88%) can walk alone. Dr. Chin and colleagues observed that lower levels of phosphorylated neurofilament heavy chain in plasma and cerebrospinal fluid on treatment at day 64 were significantly correlated with higher total score on the Hammersmith Infant Neurological Examination at day 302 and with earlier achievement of the WHO milestone walking alone.

Nusinersen and lumbar puncture were well tolerated. No children discontinued treatment or withdrew from the study because of an adverse event. The investigators did not consider any adverse events or serious adverse events to be related to the study drug. They also did not observe any clinically relevant trends related to nusinersen in hematology, blood chemistry, urinalysis, coagulation, vital signs, or ECGs.

Dr. Chin is an employee of and holds stock in Biogen, which manufactures nusinersen and is sponsoring the study.

[email protected]

SOURCE: Chin R et al. CNS-ICNA 2020, Abstract PL78.

Nusinersen provides continued, long-term benefits to infants with spinal muscular atrophy (SMA) who begin treatment before symptom onset, according to an analysis presented at the 2020 CNS-ICNA Conjoint Meeting, held virtually this year.

“Children are developing in a manner more consistent with normal development than that expected for children with two and three SMN2 gene copies,” said Russell Chin, MD, a neurologist at New York–Presbyterian Hospital. “These data demonstrate the durability of effect over a median of 3.8 years of follow-up, with children aged 2.8-4.8 years at the last visit.”

Many participants in the study achieved motor milestones within normal time limits, and no participant lost any major motor milestones. The investigators did not identify any new safety concerns during a maximum of 4.7 years of follow-up. They will follow participants until they reach approximately 8 years of age.
 

An ongoing open-label study

Dr. Chin presented interim results of the ongoing NURTURE study, which is examining the efficacy and safety of intrathecal nusinersen when administered to presymptomatic infants with SMA. The open-label, single-arm, phase 2 study is being conducted in various countries. Eligible participants were 6 weeks old or younger at first dose and had two or three copies of SMN2. The primary end point of NURTURE is time to death or respiratory intervention (i.e., invasive or noninvasive ventilation for 6 or more hours per day continuously for 7 or more days or tracheostomy). The natural history of SMA type 1 indicates that the median age at death or requirement for ventilation support is 13.5 months.

The investigators enrolled 25 infants: 15 with two copies of the gene and 10 with three copies. At the February 2020 interim analysis, participants had been in the study for 3.8 years and were aged 2.8-4.8 years at the last visit. No children had discontinued treatment or withdrawn from the study. All participants are alive, and four participants (all of whom have two copies of SMN2) required respiratory intervention. The latter children initiated respiratory support during an acute reversible illness. No subjects have required permanent ventilation, which the investigators define as ventilation for 16 or more hours per day for more than 21 days in the absence of an acute reversible event, or tracheostomy.
 

Treatment improved motor development

Approximately 84% of children achieved a maximum score on the Children’s Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP INTEND) scale. The population’s mean CHOP INTEND score increased steadily from baseline and stabilized at approximately the maximum score of 64. The population’s mean change in CHOP INTEND score from baseline to last visit was 13.6 points. The mean score at last visit was 62.0 among patients with two copies of SMN2 and 63.4 among patients with three copies. In addition, the time to first achievement of maximum CHOP INTEND score was shorter in participants with three copies of SMN2, compared with those with two. Four participants with two copies of the gene have not yet achieved a maximum CHOP INTEND score.

Many of the children in the study achieved World Health Organization motor milestones within time frames consistent with normal development. About 84% of participants became able to sit without support within the normal time frame in healthy children. Approximately 60% of children achieved walking with assistance within the normal window, and 64% achieved walking alone within the normal window. Of 25 participants, 24 are walking with assistance, and 22 of 25 (88%) can walk alone. Dr. Chin and colleagues observed that lower levels of phosphorylated neurofilament heavy chain in plasma and cerebrospinal fluid on treatment at day 64 were significantly correlated with higher total score on the Hammersmith Infant Neurological Examination at day 302 and with earlier achievement of the WHO milestone walking alone.

Nusinersen and lumbar puncture were well tolerated. No children discontinued treatment or withdrew from the study because of an adverse event. The investigators did not consider any adverse events or serious adverse events to be related to the study drug. They also did not observe any clinically relevant trends related to nusinersen in hematology, blood chemistry, urinalysis, coagulation, vital signs, or ECGs.

Dr. Chin is an employee of and holds stock in Biogen, which manufactures nusinersen and is sponsoring the study.

[email protected]

SOURCE: Chin R et al. CNS-ICNA 2020, Abstract PL78.

Nusinersen provides continued, long-term benefits to infants with spinal muscular atrophy (SMA) who begin treatment before symptom onset, according to an analysis presented at the 2020 CNS-ICNA Conjoint Meeting, held virtually this year.

“Children are developing in a manner more consistent with normal development than that expected for children with two and three SMN2 gene copies,” said Russell Chin, MD, a neurologist at New York–Presbyterian Hospital. “These data demonstrate the durability of effect over a median of 3.8 years of follow-up, with children aged 2.8-4.8 years at the last visit.”

Many participants in the study achieved motor milestones within normal time limits, and no participant lost any major motor milestones. The investigators did not identify any new safety concerns during a maximum of 4.7 years of follow-up. They will follow participants until they reach approximately 8 years of age.
 

An ongoing open-label study

Dr. Chin presented interim results of the ongoing NURTURE study, which is examining the efficacy and safety of intrathecal nusinersen when administered to presymptomatic infants with SMA. The open-label, single-arm, phase 2 study is being conducted in various countries. Eligible participants were 6 weeks old or younger at first dose and had two or three copies of SMN2. The primary end point of NURTURE is time to death or respiratory intervention (i.e., invasive or noninvasive ventilation for 6 or more hours per day continuously for 7 or more days or tracheostomy). The natural history of SMA type 1 indicates that the median age at death or requirement for ventilation support is 13.5 months.

The investigators enrolled 25 infants: 15 with two copies of the gene and 10 with three copies. At the February 2020 interim analysis, participants had been in the study for 3.8 years and were aged 2.8-4.8 years at the last visit. No children had discontinued treatment or withdrawn from the study. All participants are alive, and four participants (all of whom have two copies of SMN2) required respiratory intervention. The latter children initiated respiratory support during an acute reversible illness. No subjects have required permanent ventilation, which the investigators define as ventilation for 16 or more hours per day for more than 21 days in the absence of an acute reversible event, or tracheostomy.
 

Treatment improved motor development

Approximately 84% of children achieved a maximum score on the Children’s Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP INTEND) scale. The population’s mean CHOP INTEND score increased steadily from baseline and stabilized at approximately the maximum score of 64. The population’s mean change in CHOP INTEND score from baseline to last visit was 13.6 points. The mean score at last visit was 62.0 among patients with two copies of SMN2 and 63.4 among patients with three copies. In addition, the time to first achievement of maximum CHOP INTEND score was shorter in participants with three copies of SMN2, compared with those with two. Four participants with two copies of the gene have not yet achieved a maximum CHOP INTEND score.

Many of the children in the study achieved World Health Organization motor milestones within time frames consistent with normal development. About 84% of participants became able to sit without support within the normal time frame in healthy children. Approximately 60% of children achieved walking with assistance within the normal window, and 64% achieved walking alone within the normal window. Of 25 participants, 24 are walking with assistance, and 22 of 25 (88%) can walk alone. Dr. Chin and colleagues observed that lower levels of phosphorylated neurofilament heavy chain in plasma and cerebrospinal fluid on treatment at day 64 were significantly correlated with higher total score on the Hammersmith Infant Neurological Examination at day 302 and with earlier achievement of the WHO milestone walking alone.

Nusinersen and lumbar puncture were well tolerated. No children discontinued treatment or withdrew from the study because of an adverse event. The investigators did not consider any adverse events or serious adverse events to be related to the study drug. They also did not observe any clinically relevant trends related to nusinersen in hematology, blood chemistry, urinalysis, coagulation, vital signs, or ECGs.

Dr. Chin is an employee of and holds stock in Biogen, which manufactures nusinersen and is sponsoring the study.

[email protected]

SOURCE: Chin R et al. CNS-ICNA 2020, Abstract PL78.

Two recently completed analyses of highly purified cannabidiol (CBD) used to reduce seizures in Lennox Gastaut syndrome (LGS) have shown the formulation as an add-on treatment is effective in reducing seizures out to 3 years but that it can also cause thrombocytopenia in children on concurrent valproic acid therapy.

At the 2020 CNS-ICNA Conjoint Meeting, held virtually this year, Anul Patel, MD, section chief of Pediatric neurology at Nationwide Children’s and associate professor of clinical pediatrics and neurology at the Ohio State University, both in Columbus, Ohio, reported 156-week results of an open-label extension trial called GWPCARE5 that showed patients with LGS taking Epidiolex had a 60% or greater average reduction in seizures, compared with baseline. Epidiolex, a highly purified form of CBD, was approved by the Food and Drug Administration in 2018 for LGS and Dravet syndrome.

In a separate presentation, Nancy A. McNamara, MD, an assistant professor at the C.S. Mott Children’s Hospital at the University of Michigan, Ann Arbor, said that more than one-third of patients taking both Epidiolex and valproic acid (VPA) developed thrombocytopenia after starting CBD therapy. The single-center chart review she reported on included 83 patients.

Daniel Friedman, MD, an epilepsy specialist at New York University who’s researched CBD in children with autism spectrum disorder, said, “These studies show that, while purified CBD has durable effects on the most disabling seizures in children and adults with LGS, like all treatments, it is not without risks that warrant attention and monitoring.” 
 

Open-label extension study

The open-label extension study included 366 patients who participated in the two previous clinical trials. They were given varying doses of CBD titrated over 2 weeks with 20 mg/kg as the target dose, Dr. Patel said. The most common concurrent therapies they were taking were clobazam, valproate or VPA, lamotrigine, levetiracetam, and rufinamide. At weeks 145-156, 67% of patients had a 50% or greater reduction in seizures, 44% had a 75% or greater reduction, and 9% stopped having seizures altogether, Dr. Patel said.

“CBD treatment had a similar safety profile to what was observed in the completed parent randomized clinical trials,” Dr. Patel said. “Sustained reductions in drop and total seizures were observed up to the 156-week follow-up point. So these results demonstrate the potential long-term benefits of CBD treatment for patients with LGS as it relates to reduction of their seizures.”

Adverse event profiles in this analysis were similar to previous clinical trials, he noted. The three most common adverse events were diarrhea (38%), convulsion (38%) and pyrexia (34%), but high percentages of those adverse events resolved during follow-up: 78%, 80%, and 96%, respectively.

Dr. Patel also noted that 31% of patients had elevated liver enzymes (alanine aminotransferase or aspartate aminotransferase), but most of these patients – 78 of 113, or 69% – were on concomitant VPA. “Importantly, no patient met the standard criteria for severe drug-induced liver injury, known as Hy’s law,” he said.

Retention rates for patients were 81% at 1 year, 69% at 2 years and 65% at 3 years, Dr. Patel said.
 

“An urgent systemic review”

Dr. McNamara’s research drilled down into the interaction of CBD and VPA. “Over the past several months we have made observations that several patients that had been started on CBD, also known as Epidiolex, had developed thrombocytopenia, some of which were symptomatic,” she said. Symptoms included hematuria, easy bruising, and gingival bleeding.

That prompted what Dr. McNamara called “an urgent systemic review” of all patients on CBD. Of 83 patients started on CBD for LGS from January to August 2019, 9 (11%) developed thrombocytopenia. “All of these patients were on concurrent VPA and no patients started on CBD without VPA developed thrombocytopenia,” she said. In all, 23 patients were taking CBD concurrently with VPA. Four of nine cases were symptomatic.

“The thrombocytopenia was reversible in all patients with reduction of medication and one patient recovered spontaneously without intervention,” Dr. McNamara noted.

“This was an important finding because this was not something that had come out of the clinical trials prior to FDA approval,” Dr. McNamara said. “This requires closer monitoring for patients who are started on CBD who are already on VPA.”

Of the 23 patients taking concurrent VPA, 10 had low platelet counts after starting CBD. In six patients, platelet counts dropped from normal before CBD therapy to low afterward.

The study used a McNemar test to determine if an observed adverse event occurred by chance or was related to starting a drug, which yielded a P value of .125, Dr. McNamara said. “While this did not achieve statistical significance, we suggest that prescribers closely monitor platelet levels after starting CBD, particularly when a patient is also on concurrent VPA,” she said.

Her group obtained a complete blood count at baseline and then at 1, 3, and 6 months after starting the patient on CBD, along with evaluation of alanine aminotransferase and aspartate aminotransferase. “We believe that this is helpful because most of the patients that develop low platelets did so within 3 months of starting cannabidiol,” Dr. McNamara said.

She acknowledged the limits of the single-center study. “Future research will need to be done with larger cohorts with standardized surveillance labs,” she said in an interview.

Dr. Patel disclosed financial relationships with GW Research and Greenwich Biosciences. Dr. McNamara has no relevant disclosures.

Two recently completed analyses of highly purified cannabidiol (CBD) used to reduce seizures in Lennox Gastaut syndrome (LGS) have shown the formulation as an add-on treatment is effective in reducing seizures out to 3 years but that it can also cause thrombocytopenia in children on concurrent valproic acid therapy.

At the 2020 CNS-ICNA Conjoint Meeting, held virtually this year, Anul Patel, MD, section chief of Pediatric neurology at Nationwide Children’s and associate professor of clinical pediatrics and neurology at the Ohio State University, both in Columbus, Ohio, reported 156-week results of an open-label extension trial called GWPCARE5 that showed patients with LGS taking Epidiolex had a 60% or greater average reduction in seizures, compared with baseline. Epidiolex, a highly purified form of CBD, was approved by the Food and Drug Administration in 2018 for LGS and Dravet syndrome.

In a separate presentation, Nancy A. McNamara, MD, an assistant professor at the C.S. Mott Children’s Hospital at the University of Michigan, Ann Arbor, said that more than one-third of patients taking both Epidiolex and valproic acid (VPA) developed thrombocytopenia after starting CBD therapy. The single-center chart review she reported on included 83 patients.

Daniel Friedman, MD, an epilepsy specialist at New York University who’s researched CBD in children with autism spectrum disorder, said, “These studies show that, while purified CBD has durable effects on the most disabling seizures in children and adults with LGS, like all treatments, it is not without risks that warrant attention and monitoring.” 
 

Open-label extension study

The open-label extension study included 366 patients who participated in the two previous clinical trials. They were given varying doses of CBD titrated over 2 weeks with 20 mg/kg as the target dose, Dr. Patel said. The most common concurrent therapies they were taking were clobazam, valproate or VPA, lamotrigine, levetiracetam, and rufinamide. At weeks 145-156, 67% of patients had a 50% or greater reduction in seizures, 44% had a 75% or greater reduction, and 9% stopped having seizures altogether, Dr. Patel said.

“CBD treatment had a similar safety profile to what was observed in the completed parent randomized clinical trials,” Dr. Patel said. “Sustained reductions in drop and total seizures were observed up to the 156-week follow-up point. So these results demonstrate the potential long-term benefits of CBD treatment for patients with LGS as it relates to reduction of their seizures.”

Adverse event profiles in this analysis were similar to previous clinical trials, he noted. The three most common adverse events were diarrhea (38%), convulsion (38%) and pyrexia (34%), but high percentages of those adverse events resolved during follow-up: 78%, 80%, and 96%, respectively.

Dr. Patel also noted that 31% of patients had elevated liver enzymes (alanine aminotransferase or aspartate aminotransferase), but most of these patients – 78 of 113, or 69% – were on concomitant VPA. “Importantly, no patient met the standard criteria for severe drug-induced liver injury, known as Hy’s law,” he said.

Retention rates for patients were 81% at 1 year, 69% at 2 years and 65% at 3 years, Dr. Patel said.
 

“An urgent systemic review”

Dr. McNamara’s research drilled down into the interaction of CBD and VPA. “Over the past several months we have made observations that several patients that had been started on CBD, also known as Epidiolex, had developed thrombocytopenia, some of which were symptomatic,” she said. Symptoms included hematuria, easy bruising, and gingival bleeding.

That prompted what Dr. McNamara called “an urgent systemic review” of all patients on CBD. Of 83 patients started on CBD for LGS from January to August 2019, 9 (11%) developed thrombocytopenia. “All of these patients were on concurrent VPA and no patients started on CBD without VPA developed thrombocytopenia,” she said. In all, 23 patients were taking CBD concurrently with VPA. Four of nine cases were symptomatic.

“The thrombocytopenia was reversible in all patients with reduction of medication and one patient recovered spontaneously without intervention,” Dr. McNamara noted.

“This was an important finding because this was not something that had come out of the clinical trials prior to FDA approval,” Dr. McNamara said. “This requires closer monitoring for patients who are started on CBD who are already on VPA.”

Of the 23 patients taking concurrent VPA, 10 had low platelet counts after starting CBD. In six patients, platelet counts dropped from normal before CBD therapy to low afterward.

The study used a McNemar test to determine if an observed adverse event occurred by chance or was related to starting a drug, which yielded a P value of .125, Dr. McNamara said. “While this did not achieve statistical significance, we suggest that prescribers closely monitor platelet levels after starting CBD, particularly when a patient is also on concurrent VPA,” she said.

Her group obtained a complete blood count at baseline and then at 1, 3, and 6 months after starting the patient on CBD, along with evaluation of alanine aminotransferase and aspartate aminotransferase. “We believe that this is helpful because most of the patients that develop low platelets did so within 3 months of starting cannabidiol,” Dr. McNamara said.

She acknowledged the limits of the single-center study. “Future research will need to be done with larger cohorts with standardized surveillance labs,” she said in an interview.

Dr. Patel disclosed financial relationships with GW Research and Greenwich Biosciences. Dr. McNamara has no relevant disclosures.

Two recently completed analyses of highly purified cannabidiol (CBD) used to reduce seizures in Lennox Gastaut syndrome (LGS) have shown the formulation as an add-on treatment is effective in reducing seizures out to 3 years but that it can also cause thrombocytopenia in children on concurrent valproic acid therapy.

At the 2020 CNS-ICNA Conjoint Meeting, held virtually this year, Anul Patel, MD, section chief of Pediatric neurology at Nationwide Children’s and associate professor of clinical pediatrics and neurology at the Ohio State University, both in Columbus, Ohio, reported 156-week results of an open-label extension trial called GWPCARE5 that showed patients with LGS taking Epidiolex had a 60% or greater average reduction in seizures, compared with baseline. Epidiolex, a highly purified form of CBD, was approved by the Food and Drug Administration in 2018 for LGS and Dravet syndrome.

In a separate presentation, Nancy A. McNamara, MD, an assistant professor at the C.S. Mott Children’s Hospital at the University of Michigan, Ann Arbor, said that more than one-third of patients taking both Epidiolex and valproic acid (VPA) developed thrombocytopenia after starting CBD therapy. The single-center chart review she reported on included 83 patients.

Daniel Friedman, MD, an epilepsy specialist at New York University who’s researched CBD in children with autism spectrum disorder, said, “These studies show that, while purified CBD has durable effects on the most disabling seizures in children and adults with LGS, like all treatments, it is not without risks that warrant attention and monitoring.” 
 

Open-label extension study

The open-label extension study included 366 patients who participated in the two previous clinical trials. They were given varying doses of CBD titrated over 2 weeks with 20 mg/kg as the target dose, Dr. Patel said. The most common concurrent therapies they were taking were clobazam, valproate or VPA, lamotrigine, levetiracetam, and rufinamide. At weeks 145-156, 67% of patients had a 50% or greater reduction in seizures, 44% had a 75% or greater reduction, and 9% stopped having seizures altogether, Dr. Patel said.

“CBD treatment had a similar safety profile to what was observed in the completed parent randomized clinical trials,” Dr. Patel said. “Sustained reductions in drop and total seizures were observed up to the 156-week follow-up point. So these results demonstrate the potential long-term benefits of CBD treatment for patients with LGS as it relates to reduction of their seizures.”

Adverse event profiles in this analysis were similar to previous clinical trials, he noted. The three most common adverse events were diarrhea (38%), convulsion (38%) and pyrexia (34%), but high percentages of those adverse events resolved during follow-up: 78%, 80%, and 96%, respectively.

Dr. Patel also noted that 31% of patients had elevated liver enzymes (alanine aminotransferase or aspartate aminotransferase), but most of these patients – 78 of 113, or 69% – were on concomitant VPA. “Importantly, no patient met the standard criteria for severe drug-induced liver injury, known as Hy’s law,” he said.

Retention rates for patients were 81% at 1 year, 69% at 2 years and 65% at 3 years, Dr. Patel said.
 

“An urgent systemic review”

Dr. McNamara’s research drilled down into the interaction of CBD and VPA. “Over the past several months we have made observations that several patients that had been started on CBD, also known as Epidiolex, had developed thrombocytopenia, some of which were symptomatic,” she said. Symptoms included hematuria, easy bruising, and gingival bleeding.

That prompted what Dr. McNamara called “an urgent systemic review” of all patients on CBD. Of 83 patients started on CBD for LGS from January to August 2019, 9 (11%) developed thrombocytopenia. “All of these patients were on concurrent VPA and no patients started on CBD without VPA developed thrombocytopenia,” she said. In all, 23 patients were taking CBD concurrently with VPA. Four of nine cases were symptomatic.

“The thrombocytopenia was reversible in all patients with reduction of medication and one patient recovered spontaneously without intervention,” Dr. McNamara noted.

“This was an important finding because this was not something that had come out of the clinical trials prior to FDA approval,” Dr. McNamara said. “This requires closer monitoring for patients who are started on CBD who are already on VPA.”

Of the 23 patients taking concurrent VPA, 10 had low platelet counts after starting CBD. In six patients, platelet counts dropped from normal before CBD therapy to low afterward.

The study used a McNemar test to determine if an observed adverse event occurred by chance or was related to starting a drug, which yielded a P value of .125, Dr. McNamara said. “While this did not achieve statistical significance, we suggest that prescribers closely monitor platelet levels after starting CBD, particularly when a patient is also on concurrent VPA,” she said.

Her group obtained a complete blood count at baseline and then at 1, 3, and 6 months after starting the patient on CBD, along with evaluation of alanine aminotransferase and aspartate aminotransferase. “We believe that this is helpful because most of the patients that develop low platelets did so within 3 months of starting cannabidiol,” Dr. McNamara said.

She acknowledged the limits of the single-center study. “Future research will need to be done with larger cohorts with standardized surveillance labs,” she said in an interview.

Dr. Patel disclosed financial relationships with GW Research and Greenwich Biosciences. Dr. McNamara has no relevant disclosures.

New developments in treatment of neuromyelitis optica spectrum disorder (NMOSD) have opened up options for disease treatment in pediatric patients, but have led to some uncertainty and confusion as well.

At the2020 CNS-ICNA Conjoint Meeting, held virtually this year, presenters discussed some of the challenges of differential diagnosis and treatment choice in pediatric NMOSD, which is easily confused with multiple sclerosis.

NMOSD used to be considered a monophasic disease restricted to the optic nerve and spinal cord, but is now known to affect other regions of the central nervous system and to relapse in some patients.
 

Diagnosis

The disease is often mediated by antibodies to the aquaporin-4 (AQP-4) water channel, but about 30% of adult patients lack the antibody, and AQP-4 seronegativity is more common in the pediatric population. Another common antibody found in 40%–50% of children with NMOSD targets myelin oligodendrocyte glycoprotein (MOG).

It is important to be aware that false negatives can occur in serology assays, and false positives are common, particularly in ELISA assays, Silvia N. Tenembaum, MD, said during her presentation. For those reasons, serology is not enough for a diagnosis. “Patients should also have compatible symptoms and MRI findings,” said Dr. Tenembaum, director of the pediatric neuroimmunology program at National Pediatric Hospital in Buenos Aires.

According to international consensus criteria, to be diagnosed with NMOSD, AQP-4 seropositive patients should also have at least one core clinical symptom: optic neuritis, acute myelitis, area postrema syndrome, other acute brainstem syndrome, symptomatic narcolepsy or acute diencephalic clinical syndrome, or symptomatic cerebral syndrome. AQP-4 seronegative patients or with unknown status should have at least two core symptoms, one of which must be optic neuritis, acute myelitis, or area postrema syndrome. Both conventional MRI and advanced new techniques are important for achieving differential diagnosis.

The most common symptom in children is optic neuritis, which occurs in 50%-70% of patients. Cerebral syndromes with or without encephalopathy and large tumefactive white matter lesions are also common, according to Dr. Tenembaum.

There are many conditions that mimic the spinal cord and optic nerve symptoms of NMOSD, which must be ruled out. One example is optic myelopathy and vision loss from late-onset biotinylase deficiency. It is critical to rule that out because it is treatable with supplements. Optic neuropathy, papillitis, and papilledema can also resemble NMOSD.

It is critical to achieve an early diagnosis of NMOSD in children, because some MS drugs can worsen NMOSD, according to Thaís Armangue, MD, PhD, head of neuroimmunology at SJD Barcelona Children’s Hospital, who also presented at the session. She pointed out that the MOG antibody, while common in children, is also associated with many demyelinating diseases. Some 50%-60% of children with acute disseminated encephalomyelitis (ADEM) have high titers of MOG antibodies. Although early studies suggested that persistent anti-MOG antibodies were associated with risk of developing MS, more recent studies show it predicts a non-MS disease course, particularly at titers greater than 1:1280, according to Dr. Tenembaum. Persistent anti-MOG antibodies are also associated with relapsing disease, but it is associated with other syndromes besides NMOSD. “The probability is that [MOG antibodies are] useful, but they cannot guide chronic immunotherapy, because even monophasic patients can last maybe 12 months before they become MOG negative, and we cannot wait so many months” to determine treatment course, said Dr. Tenembaum.

For monophasic ADEM or NMOSD, there is no need for chronic treatment. But children with MS and recurrent NMOSD require early chronic immunotherapy because specific therapies have been shown to improve prognosis.
 

Acute treatment

When it comes to acute treatment of NMOSD, the goal is to suppress the inflammatory attack but also to minimize long-term damage and optimize long-term neurological function. “The potential for irreversible injury with an attack is very high, and cumulative disabilities in NMOSD can result directly from attacks,” E. Ann Yeh, MD, director of the Pediatric MS and Neuroinflammatory Disorders Program at the Hospital for Sick Children at the University of Toronto, said during her talk.

IV steroids are generally the first choice, with a preference for methylprednisolone. Pediatric patients that are MOG antibody positive usually respond better and more quickly than do adults, with rapid daily improvements in mobility, vomiting, and eyesight. Dr. Yeh recommends weaning good responders off steroids because AQP-4 positive patients are likely to relapse without a steroid wean, and antibody testing may be unavailable or results may be delayed. The wean can range from 4 weeks to 4-6 months, depending on antibody status, likelihood of AQP-4 positivity, and clinical parameters.

Inadequate responses are usually pretty evident. If there is only light perception by day 4 or 5, or paralyzed patients are nonambulatory and achieve only twitchy movements by that time, second-line therapies should be considered, including therapeutic plasma exchange (TPE) with 5-7 exchanges or intravenous immunoglobulins (IVIg).

Dr. Yeh called for quick treatment. Whatever you do, “please do it sooner rather than later if you think there’s no response [to steroids],” Dr. Yeh said.

TPE is the first choice, according to Dr. Yeh. “There seems to be a fair amount of information that suggests that if you’re having difficulty getting a response to steroids, TPE can make a difference in these patients,” she said. But in some cases TPE may not be available, and IVIg can be attempted first. If it achieves no or only marginal improvement, TPE can be attempted later, but it must be kept in mind that TPE conducted too soon could wash out IVIg. Patients who get much better on IVIg can undergo a steroid wean, and then be evaluated for prophylactic therapy, said Dr. Yeh.

The evidence for IVIg is limited, reflecting the difficulty of studying treatments in rare populations. Still, when TPE is not available and the patient is quite impaired, IVIg makes sense to try. “Absence of evidence does not mean that the therapy doesn’t work, and I don’t think we should throw out the baby with the bath water,” said Dr. Yeh.

Although IVIg treatment is generally well tolerated, there have been a few serious adverse events, such as anaphylactic shock and aseptic meningitis, according to Andrea Savransky, MD, a pediatrician at National Pediatric Hospital in Buenos Aires, who also spoke at the session. “I think it is important to weigh the benefits against the risk,” Dr. Savransky said. She noted that TPE should not be taken lightly. One study showed more complications in pediatric patients than in adult patients, and it must be performed in specialized centers.
 

Emerging treaments

Tanuja Chitnis, MD, director of the Partners Pediatric MS Center at Massachusetts General Hospital, Boston, discussed some of the emerging treatments for pediatric NMOSD. Rituximab has been associated with success in some retrospective studies, but dosing should be personalized. Dr. Chitnis reported that B cells can return before 6 months, so she monitors B cells beginning 2 months after induction, redosing after 4 or 5 months rather than 6 if B cells return.

Nevertheless, relapses can still occur after rituximab therapy. “There is room for additional therapies to address this gap,” said Dr. Chitnis. Three new antibodies have received approval for treatment of NMOSD in adults. These include the complement inhibitor eculizumab, the IL-6 receptor antibody satralizumab, and the anti-CD19 antibody inebilizumab. Phase 3 clinical trials in children have been conducted for eculizumab and are in the planning stage for inebilizumab, and pediatric patients were included in pivotal trials for satralizumab.

Eculizumab treatment resulted in a 94.2% reduction in relapse risk in AQP4-positive adults. Satralizumab showed a 79% reduction in relapse risk among AQP-4 positive subjects with NMOSD or neuromyelitis optica and a 34% reduction in those who were AQP-4 negative. The pediatric subgroup had similar levels of response to adults, though the numbers were too small for a subgroup analysis.

In AQP-4 positive patients, inebilizumab treatment yielded a 77% reduction in relapse rate. In all patients, there was a 73% reduction.

For MOG antibody-positive patients with AQP-4 negative disease, novel therapies are at earlier stages of development. Typical MS therapies such as interferon beta and glatiramer acetate don’t seem to be effective. Some that have shown signs of efficacy include azathioprine, mycophenylate mofetil, rituximab, and IVIg infusion, but the state of the field is not encouraging. “This is an observation now being studied in larger cohorts, but in general I have not found that there’s a very strong response to any of these therapies, possibly with the exception of IVIg,” said Dr. Chitnis.

Dr. Tenembaum has no relevant financial disclosures. Dr. Armangue has received speaking honoraria from Novartis and travel expenses for scientific meetings from Merck, Biogen, and Roche. Dr. Yeh is on the scientific advisory board of Juno Therapeutics and has received research support from Biogen. Dr. Chitnis advises Biogen-Idec, Novartis, and Alexion, serves on clinical trial advisory boards for Novartis and Sanofi Aventis, and has received research support from Verily, EMD Serono, and Novartis. Dr. Savransky has received honoraria from Genzyme de Argentina SA.

New developments in treatment of neuromyelitis optica spectrum disorder (NMOSD) have opened up options for disease treatment in pediatric patients, but have led to some uncertainty and confusion as well.

At the2020 CNS-ICNA Conjoint Meeting, held virtually this year, presenters discussed some of the challenges of differential diagnosis and treatment choice in pediatric NMOSD, which is easily confused with multiple sclerosis.

NMOSD used to be considered a monophasic disease restricted to the optic nerve and spinal cord, but is now known to affect other regions of the central nervous system and to relapse in some patients.
 

Diagnosis

The disease is often mediated by antibodies to the aquaporin-4 (AQP-4) water channel, but about 30% of adult patients lack the antibody, and AQP-4 seronegativity is more common in the pediatric population. Another common antibody found in 40%–50% of children with NMOSD targets myelin oligodendrocyte glycoprotein (MOG).

It is important to be aware that false negatives can occur in serology assays, and false positives are common, particularly in ELISA assays, Silvia N. Tenembaum, MD, said during her presentation. For those reasons, serology is not enough for a diagnosis. “Patients should also have compatible symptoms and MRI findings,” said Dr. Tenembaum, director of the pediatric neuroimmunology program at National Pediatric Hospital in Buenos Aires.

According to international consensus criteria, to be diagnosed with NMOSD, AQP-4 seropositive patients should also have at least one core clinical symptom: optic neuritis, acute myelitis, area postrema syndrome, other acute brainstem syndrome, symptomatic narcolepsy or acute diencephalic clinical syndrome, or symptomatic cerebral syndrome. AQP-4 seronegative patients or with unknown status should have at least two core symptoms, one of which must be optic neuritis, acute myelitis, or area postrema syndrome. Both conventional MRI and advanced new techniques are important for achieving differential diagnosis.

The most common symptom in children is optic neuritis, which occurs in 50%-70% of patients. Cerebral syndromes with or without encephalopathy and large tumefactive white matter lesions are also common, according to Dr. Tenembaum.

There are many conditions that mimic the spinal cord and optic nerve symptoms of NMOSD, which must be ruled out. One example is optic myelopathy and vision loss from late-onset biotinylase deficiency. It is critical to rule that out because it is treatable with supplements. Optic neuropathy, papillitis, and papilledema can also resemble NMOSD.

It is critical to achieve an early diagnosis of NMOSD in children, because some MS drugs can worsen NMOSD, according to Thaís Armangue, MD, PhD, head of neuroimmunology at SJD Barcelona Children’s Hospital, who also presented at the session. She pointed out that the MOG antibody, while common in children, is also associated with many demyelinating diseases. Some 50%-60% of children with acute disseminated encephalomyelitis (ADEM) have high titers of MOG antibodies. Although early studies suggested that persistent anti-MOG antibodies were associated with risk of developing MS, more recent studies show it predicts a non-MS disease course, particularly at titers greater than 1:1280, according to Dr. Tenembaum. Persistent anti-MOG antibodies are also associated with relapsing disease, but it is associated with other syndromes besides NMOSD. “The probability is that [MOG antibodies are] useful, but they cannot guide chronic immunotherapy, because even monophasic patients can last maybe 12 months before they become MOG negative, and we cannot wait so many months” to determine treatment course, said Dr. Tenembaum.

For monophasic ADEM or NMOSD, there is no need for chronic treatment. But children with MS and recurrent NMOSD require early chronic immunotherapy because specific therapies have been shown to improve prognosis.
 

Acute treatment

When it comes to acute treatment of NMOSD, the goal is to suppress the inflammatory attack but also to minimize long-term damage and optimize long-term neurological function. “The potential for irreversible injury with an attack is very high, and cumulative disabilities in NMOSD can result directly from attacks,” E. Ann Yeh, MD, director of the Pediatric MS and Neuroinflammatory Disorders Program at the Hospital for Sick Children at the University of Toronto, said during her talk.

IV steroids are generally the first choice, with a preference for methylprednisolone. Pediatric patients that are MOG antibody positive usually respond better and more quickly than do adults, with rapid daily improvements in mobility, vomiting, and eyesight. Dr. Yeh recommends weaning good responders off steroids because AQP-4 positive patients are likely to relapse without a steroid wean, and antibody testing may be unavailable or results may be delayed. The wean can range from 4 weeks to 4-6 months, depending on antibody status, likelihood of AQP-4 positivity, and clinical parameters.

Inadequate responses are usually pretty evident. If there is only light perception by day 4 or 5, or paralyzed patients are nonambulatory and achieve only twitchy movements by that time, second-line therapies should be considered, including therapeutic plasma exchange (TPE) with 5-7 exchanges or intravenous immunoglobulins (IVIg).

Dr. Yeh called for quick treatment. Whatever you do, “please do it sooner rather than later if you think there’s no response [to steroids],” Dr. Yeh said.

TPE is the first choice, according to Dr. Yeh. “There seems to be a fair amount of information that suggests that if you’re having difficulty getting a response to steroids, TPE can make a difference in these patients,” she said. But in some cases TPE may not be available, and IVIg can be attempted first. If it achieves no or only marginal improvement, TPE can be attempted later, but it must be kept in mind that TPE conducted too soon could wash out IVIg. Patients who get much better on IVIg can undergo a steroid wean, and then be evaluated for prophylactic therapy, said Dr. Yeh.

The evidence for IVIg is limited, reflecting the difficulty of studying treatments in rare populations. Still, when TPE is not available and the patient is quite impaired, IVIg makes sense to try. “Absence of evidence does not mean that the therapy doesn’t work, and I don’t think we should throw out the baby with the bath water,” said Dr. Yeh.

Although IVIg treatment is generally well tolerated, there have been a few serious adverse events, such as anaphylactic shock and aseptic meningitis, according to Andrea Savransky, MD, a pediatrician at National Pediatric Hospital in Buenos Aires, who also spoke at the session. “I think it is important to weigh the benefits against the risk,” Dr. Savransky said. She noted that TPE should not be taken lightly. One study showed more complications in pediatric patients than in adult patients, and it must be performed in specialized centers.
 

Emerging treaments

Tanuja Chitnis, MD, director of the Partners Pediatric MS Center at Massachusetts General Hospital, Boston, discussed some of the emerging treatments for pediatric NMOSD. Rituximab has been associated with success in some retrospective studies, but dosing should be personalized. Dr. Chitnis reported that B cells can return before 6 months, so she monitors B cells beginning 2 months after induction, redosing after 4 or 5 months rather than 6 if B cells return.

Nevertheless, relapses can still occur after rituximab therapy. “There is room for additional therapies to address this gap,” said Dr. Chitnis. Three new antibodies have received approval for treatment of NMOSD in adults. These include the complement inhibitor eculizumab, the IL-6 receptor antibody satralizumab, and the anti-CD19 antibody inebilizumab. Phase 3 clinical trials in children have been conducted for eculizumab and are in the planning stage for inebilizumab, and pediatric patients were included in pivotal trials for satralizumab.

Eculizumab treatment resulted in a 94.2% reduction in relapse risk in AQP4-positive adults. Satralizumab showed a 79% reduction in relapse risk among AQP-4 positive subjects with NMOSD or neuromyelitis optica and a 34% reduction in those who were AQP-4 negative. The pediatric subgroup had similar levels of response to adults, though the numbers were too small for a subgroup analysis.

In AQP-4 positive patients, inebilizumab treatment yielded a 77% reduction in relapse rate. In all patients, there was a 73% reduction.

For MOG antibody-positive patients with AQP-4 negative disease, novel therapies are at earlier stages of development. Typical MS therapies such as interferon beta and glatiramer acetate don’t seem to be effective. Some that have shown signs of efficacy include azathioprine, mycophenylate mofetil, rituximab, and IVIg infusion, but the state of the field is not encouraging. “This is an observation now being studied in larger cohorts, but in general I have not found that there’s a very strong response to any of these therapies, possibly with the exception of IVIg,” said Dr. Chitnis.

Dr. Tenembaum has no relevant financial disclosures. Dr. Armangue has received speaking honoraria from Novartis and travel expenses for scientific meetings from Merck, Biogen, and Roche. Dr. Yeh is on the scientific advisory board of Juno Therapeutics and has received research support from Biogen. Dr. Chitnis advises Biogen-Idec, Novartis, and Alexion, serves on clinical trial advisory boards for Novartis and Sanofi Aventis, and has received research support from Verily, EMD Serono, and Novartis. Dr. Savransky has received honoraria from Genzyme de Argentina SA.

New developments in treatment of neuromyelitis optica spectrum disorder (NMOSD) have opened up options for disease treatment in pediatric patients, but have led to some uncertainty and confusion as well.

At the2020 CNS-ICNA Conjoint Meeting, held virtually this year, presenters discussed some of the challenges of differential diagnosis and treatment choice in pediatric NMOSD, which is easily confused with multiple sclerosis.

NMOSD used to be considered a monophasic disease restricted to the optic nerve and spinal cord, but is now known to affect other regions of the central nervous system and to relapse in some patients.
 

Diagnosis

The disease is often mediated by antibodies to the aquaporin-4 (AQP-4) water channel, but about 30% of adult patients lack the antibody, and AQP-4 seronegativity is more common in the pediatric population. Another common antibody found in 40%–50% of children with NMOSD targets myelin oligodendrocyte glycoprotein (MOG).

It is important to be aware that false negatives can occur in serology assays, and false positives are common, particularly in ELISA assays, Silvia N. Tenembaum, MD, said during her presentation. For those reasons, serology is not enough for a diagnosis. “Patients should also have compatible symptoms and MRI findings,” said Dr. Tenembaum, director of the pediatric neuroimmunology program at National Pediatric Hospital in Buenos Aires.

According to international consensus criteria, to be diagnosed with NMOSD, AQP-4 seropositive patients should also have at least one core clinical symptom: optic neuritis, acute myelitis, area postrema syndrome, other acute brainstem syndrome, symptomatic narcolepsy or acute diencephalic clinical syndrome, or symptomatic cerebral syndrome. AQP-4 seronegative patients or with unknown status should have at least two core symptoms, one of which must be optic neuritis, acute myelitis, or area postrema syndrome. Both conventional MRI and advanced new techniques are important for achieving differential diagnosis.

The most common symptom in children is optic neuritis, which occurs in 50%-70% of patients. Cerebral syndromes with or without encephalopathy and large tumefactive white matter lesions are also common, according to Dr. Tenembaum.

There are many conditions that mimic the spinal cord and optic nerve symptoms of NMOSD, which must be ruled out. One example is optic myelopathy and vision loss from late-onset biotinylase deficiency. It is critical to rule that out because it is treatable with supplements. Optic neuropathy, papillitis, and papilledema can also resemble NMOSD.

It is critical to achieve an early diagnosis of NMOSD in children, because some MS drugs can worsen NMOSD, according to Thaís Armangue, MD, PhD, head of neuroimmunology at SJD Barcelona Children’s Hospital, who also presented at the session. She pointed out that the MOG antibody, while common in children, is also associated with many demyelinating diseases. Some 50%-60% of children with acute disseminated encephalomyelitis (ADEM) have high titers of MOG antibodies. Although early studies suggested that persistent anti-MOG antibodies were associated with risk of developing MS, more recent studies show it predicts a non-MS disease course, particularly at titers greater than 1:1280, according to Dr. Tenembaum. Persistent anti-MOG antibodies are also associated with relapsing disease, but it is associated with other syndromes besides NMOSD. “The probability is that [MOG antibodies are] useful, but they cannot guide chronic immunotherapy, because even monophasic patients can last maybe 12 months before they become MOG negative, and we cannot wait so many months” to determine treatment course, said Dr. Tenembaum.

For monophasic ADEM or NMOSD, there is no need for chronic treatment. But children with MS and recurrent NMOSD require early chronic immunotherapy because specific therapies have been shown to improve prognosis.
 

Acute treatment

When it comes to acute treatment of NMOSD, the goal is to suppress the inflammatory attack but also to minimize long-term damage and optimize long-term neurological function. “The potential for irreversible injury with an attack is very high, and cumulative disabilities in NMOSD can result directly from attacks,” E. Ann Yeh, MD, director of the Pediatric MS and Neuroinflammatory Disorders Program at the Hospital for Sick Children at the University of Toronto, said during her talk.

IV steroids are generally the first choice, with a preference for methylprednisolone. Pediatric patients that are MOG antibody positive usually respond better and more quickly than do adults, with rapid daily improvements in mobility, vomiting, and eyesight. Dr. Yeh recommends weaning good responders off steroids because AQP-4 positive patients are likely to relapse without a steroid wean, and antibody testing may be unavailable or results may be delayed. The wean can range from 4 weeks to 4-6 months, depending on antibody status, likelihood of AQP-4 positivity, and clinical parameters.

Inadequate responses are usually pretty evident. If there is only light perception by day 4 or 5, or paralyzed patients are nonambulatory and achieve only twitchy movements by that time, second-line therapies should be considered, including therapeutic plasma exchange (TPE) with 5-7 exchanges or intravenous immunoglobulins (IVIg).

Dr. Yeh called for quick treatment. Whatever you do, “please do it sooner rather than later if you think there’s no response [to steroids],” Dr. Yeh said.

TPE is the first choice, according to Dr. Yeh. “There seems to be a fair amount of information that suggests that if you’re having difficulty getting a response to steroids, TPE can make a difference in these patients,” she said. But in some cases TPE may not be available, and IVIg can be attempted first. If it achieves no or only marginal improvement, TPE can be attempted later, but it must be kept in mind that TPE conducted too soon could wash out IVIg. Patients who get much better on IVIg can undergo a steroid wean, and then be evaluated for prophylactic therapy, said Dr. Yeh.

The evidence for IVIg is limited, reflecting the difficulty of studying treatments in rare populations. Still, when TPE is not available and the patient is quite impaired, IVIg makes sense to try. “Absence of evidence does not mean that the therapy doesn’t work, and I don’t think we should throw out the baby with the bath water,” said Dr. Yeh.

Although IVIg treatment is generally well tolerated, there have been a few serious adverse events, such as anaphylactic shock and aseptic meningitis, according to Andrea Savransky, MD, a pediatrician at National Pediatric Hospital in Buenos Aires, who also spoke at the session. “I think it is important to weigh the benefits against the risk,” Dr. Savransky said. She noted that TPE should not be taken lightly. One study showed more complications in pediatric patients than in adult patients, and it must be performed in specialized centers.
 

Emerging treaments

Tanuja Chitnis, MD, director of the Partners Pediatric MS Center at Massachusetts General Hospital, Boston, discussed some of the emerging treatments for pediatric NMOSD. Rituximab has been associated with success in some retrospective studies, but dosing should be personalized. Dr. Chitnis reported that B cells can return before 6 months, so she monitors B cells beginning 2 months after induction, redosing after 4 or 5 months rather than 6 if B cells return.

Nevertheless, relapses can still occur after rituximab therapy. “There is room for additional therapies to address this gap,” said Dr. Chitnis. Three new antibodies have received approval for treatment of NMOSD in adults. These include the complement inhibitor eculizumab, the IL-6 receptor antibody satralizumab, and the anti-CD19 antibody inebilizumab. Phase 3 clinical trials in children have been conducted for eculizumab and are in the planning stage for inebilizumab, and pediatric patients were included in pivotal trials for satralizumab.

Eculizumab treatment resulted in a 94.2% reduction in relapse risk in AQP4-positive adults. Satralizumab showed a 79% reduction in relapse risk among AQP-4 positive subjects with NMOSD or neuromyelitis optica and a 34% reduction in those who were AQP-4 negative. The pediatric subgroup had similar levels of response to adults, though the numbers were too small for a subgroup analysis.

In AQP-4 positive patients, inebilizumab treatment yielded a 77% reduction in relapse rate. In all patients, there was a 73% reduction.

For MOG antibody-positive patients with AQP-4 negative disease, novel therapies are at earlier stages of development. Typical MS therapies such as interferon beta and glatiramer acetate don’t seem to be effective. Some that have shown signs of efficacy include azathioprine, mycophenylate mofetil, rituximab, and IVIg infusion, but the state of the field is not encouraging. “This is an observation now being studied in larger cohorts, but in general I have not found that there’s a very strong response to any of these therapies, possibly with the exception of IVIg,” said Dr. Chitnis.

Dr. Tenembaum has no relevant financial disclosures. Dr. Armangue has received speaking honoraria from Novartis and travel expenses for scientific meetings from Merck, Biogen, and Roche. Dr. Yeh is on the scientific advisory board of Juno Therapeutics and has received research support from Biogen. Dr. Chitnis advises Biogen-Idec, Novartis, and Alexion, serves on clinical trial advisory boards for Novartis and Sanofi Aventis, and has received research support from Verily, EMD Serono, and Novartis. Dr. Savransky has received honoraria from Genzyme de Argentina SA.

Patients with systemic sclerosis have variable disease progression but often experience debilitating fatigue, pain, and digestive issues – and they’re extremely concerned about progressive organ damage, according to those who spoke at and provided input at a public meeting on patient-focused drug development for the disease.

Wikimedia Commons/FitzColinGerald/ Creative Commons License

The virtual meeting was part of the Food and Drug Administration’s Patient-Focused Drug Development (PFDD) initiative, which began in 2012 and aims to provide a systematic way for patients’ experiences, needs, and priorities to be “captured and meaningfully incorporated” into drug development and evaluation.
 

Patients rate their most impactful symptoms

Dinesh Khanna, MBBS, MSc, a rheumatologist who directs a scleroderma research program at the University of Michigan, Ann Arbor, attended the meeting after giving an opening presentation on the disease to FDA officials, patients, and other participants. In a later interview, he said that patients’ ratings of their most impactful symptoms was especially striking.

Raynaud’s phenomenon, digestive symptoms, and fatigue were the top three answers to a poll question that asked patients what symptom had the most significant impact on daily life, he noted, “and none of these are being [strongly] addressed right now [in clinical trials] apart from Raynaud’s phenomenon, for which there are some trials ongoing.”

He and other researchers are “struggling with what outcomes measures to use [in their studies],” said Dr. Khanna, the Frederick G.L. Huetwell Professor of Rheumatology at the University. “My takeaway from the meeting as a clinical trialist is that we should be paying close attention to the symptoms that patients tell us are the most important. We should be including these in our trial designs as secondary endpoints, if not primary endpoints. We have not done that [thus far], really.”

Approximately 200,000 patients in the United States have scleroderma, and approximately 75,000-80,000 of these patients have systemic scleroderma, or systemic sclerosis, Dr. Khanna said in his opening presentation. Each year, he estimates, about 6,000 new diagnoses of systemic sclerosis are made.

More than 200 people – patients, FDA officials, and others – participated in the PFDD meeting. Patients participated in one of two panels – one focused on health effects and daily impacts, and the other on treatments – or submitted input electronically. All were invited to answer poll questions.

Raj Nair, MD, one of eight FDA leaders attending the meeting, noted in closing remarks that the pain experienced by patients with systemic sclerosis includes severe pain from Raynaud’s phenomenon and pain caused by digital ulcers and by calcinosis. “We heard about how paralyzing the pain from calcinosis is, and that there are very few options for alleviating this pain,” said Dr. Nair, of the division of rheumatology and transplant medicine.

Another takeaway, he said, is that the “fatigue can be severe and debilitating, leading to days where it is impossible to get out of bed,” and that digestive symptoms can also be severe. “Reflux,” he noted, “requires significant medical intervention.”
 

Patients describe their experiences

Rosemary Lyons, diagnosed with scleroderma 35 years ago, explained that while her skin is no longer hardened, she is overly sensitive to fabrics and skin care products and has difficulty with sleeping and eating. She moved away from family in the Northeast to live in the South where the climate is warmer, but even on a 90-degree night she needs a blanket and two comforters to curb the cold and attempt to sleep.

Impaired gastrointestinal motility has made food her “biggest problem” for the past 10 years, and because of GI symptoms, she can eat only one meal a day. She also experiences fainting, brain fog, and severe fatigue. On a good day, Ms. Lyons noted, she sometimes opts to do some house chores “knowing that I’ll have 1-3 days of recovery.”

Another patient, Amy Harding, said that 22 years after her scleroderma diagnosis, “the calcinosis I get in my fingers, elbows, toes, and ears tops all the prior symptoms.” The skin tightening and digital ulcers that she experienced in the first 10 years have tapered off, and while Raynaud’s symptoms and heartburn have worsened, they are at least partly manageable with medications, unlike the pain from calcinosis.
 

Treating symptoms vs. disease may be key in risk-benefit analysis

In questions after patient presentations, FDA officials probed for more perspective on issues such as how fatigue should be assessed, the differences between fatigue and brain fog, the impact of calcinosis on functioning, and how much risk patients would be willing to assume from treatments that have side effects and that may or may not modulate the disease and slow disease progression.

Most patients said in response to an FDA poll question that they definitely (almost 40%) or possibly (almost 50%) would be willing to try a hypothetical new self-injectable medication if it were shown to reduce their most impactful symptoms but had side effects.

“I think what [we’ve been hearing] today is that whether we’re working on the symptoms or the disease itself is [the key]” to patients’ risk-benefit analysis, said meeting moderator Capt. Robyn Bent, RN, MS, of the U.S. Public Health Service, and director of the PFDD.

Anita Devine, diagnosed 13 years ago with systemic sclerosis, was one of several panel members who said she would accept more bothersome treatment side effects and risks “if the gain was control of disease progression and overall quality of life ... and organ preservation.” Ms. Devine, who has needed kidney dialysis and multiple hand surgeries, noted that she previously took anti-neoplastic and anti-inflammatory agents “to try to stem the course of my disease, but unfortunately the disease did not abate.”

Treatments for systemic sclerosis include vasodilators, immunosuppressive medications, antifibrotic therapies, and stem cell transplants, Dr. Khanna said in his opening remarks.

Trials of drugs for scleroderma have focused on early disease that may be amenable to treatment, with the exception of trials for pulmonary arterial hypertension, which affects some patients with systemic sclerosis. There are multiple FDA-approved drugs for pulmonary arterial hypertension and more trials are underway.

Outcomes such as pain and fatigue are included in many of the trials currently underway, but they tend to be lower-level secondary outcomes measures that cannot be incorporated into drug labeling or are more “exploratory in nature,” Dr. Khanna said in the interview.

Dr. Khanna disclosed that he is the chief medical officer (an equity position) for CiVi Biopharma/Eicos Sciences Inc., which is developing a drug for Raynaud’s, and serves as a consultant and grant recipient for numerous companies that make or are developing drugs for systemic sclerosis.

The FDA will accept patient comments until Dec. 15, 2020, at which time comments will be compiled into a summary report, Ms. Bent said.

Patients with systemic sclerosis have variable disease progression but often experience debilitating fatigue, pain, and digestive issues – and they’re extremely concerned about progressive organ damage, according to those who spoke at and provided input at a public meeting on patient-focused drug development for the disease.

Wikimedia Commons/FitzColinGerald/ Creative Commons License

The virtual meeting was part of the Food and Drug Administration’s Patient-Focused Drug Development (PFDD) initiative, which began in 2012 and aims to provide a systematic way for patients’ experiences, needs, and priorities to be “captured and meaningfully incorporated” into drug development and evaluation.
 

Patients rate their most impactful symptoms

Dinesh Khanna, MBBS, MSc, a rheumatologist who directs a scleroderma research program at the University of Michigan, Ann Arbor, attended the meeting after giving an opening presentation on the disease to FDA officials, patients, and other participants. In a later interview, he said that patients’ ratings of their most impactful symptoms was especially striking.

Raynaud’s phenomenon, digestive symptoms, and fatigue were the top three answers to a poll question that asked patients what symptom had the most significant impact on daily life, he noted, “and none of these are being [strongly] addressed right now [in clinical trials] apart from Raynaud’s phenomenon, for which there are some trials ongoing.”

He and other researchers are “struggling with what outcomes measures to use [in their studies],” said Dr. Khanna, the Frederick G.L. Huetwell Professor of Rheumatology at the University. “My takeaway from the meeting as a clinical trialist is that we should be paying close attention to the symptoms that patients tell us are the most important. We should be including these in our trial designs as secondary endpoints, if not primary endpoints. We have not done that [thus far], really.”

Approximately 200,000 patients in the United States have scleroderma, and approximately 75,000-80,000 of these patients have systemic scleroderma, or systemic sclerosis, Dr. Khanna said in his opening presentation. Each year, he estimates, about 6,000 new diagnoses of systemic sclerosis are made.

More than 200 people – patients, FDA officials, and others – participated in the PFDD meeting. Patients participated in one of two panels – one focused on health effects and daily impacts, and the other on treatments – or submitted input electronically. All were invited to answer poll questions.

Raj Nair, MD, one of eight FDA leaders attending the meeting, noted in closing remarks that the pain experienced by patients with systemic sclerosis includes severe pain from Raynaud’s phenomenon and pain caused by digital ulcers and by calcinosis. “We heard about how paralyzing the pain from calcinosis is, and that there are very few options for alleviating this pain,” said Dr. Nair, of the division of rheumatology and transplant medicine.

Another takeaway, he said, is that the “fatigue can be severe and debilitating, leading to days where it is impossible to get out of bed,” and that digestive symptoms can also be severe. “Reflux,” he noted, “requires significant medical intervention.”
 

Patients describe their experiences

Rosemary Lyons, diagnosed with scleroderma 35 years ago, explained that while her skin is no longer hardened, she is overly sensitive to fabrics and skin care products and has difficulty with sleeping and eating. She moved away from family in the Northeast to live in the South where the climate is warmer, but even on a 90-degree night she needs a blanket and two comforters to curb the cold and attempt to sleep.

Impaired gastrointestinal motility has made food her “biggest problem” for the past 10 years, and because of GI symptoms, she can eat only one meal a day. She also experiences fainting, brain fog, and severe fatigue. On a good day, Ms. Lyons noted, she sometimes opts to do some house chores “knowing that I’ll have 1-3 days of recovery.”

Another patient, Amy Harding, said that 22 years after her scleroderma diagnosis, “the calcinosis I get in my fingers, elbows, toes, and ears tops all the prior symptoms.” The skin tightening and digital ulcers that she experienced in the first 10 years have tapered off, and while Raynaud’s symptoms and heartburn have worsened, they are at least partly manageable with medications, unlike the pain from calcinosis.
 

Treating symptoms vs. disease may be key in risk-benefit analysis

In questions after patient presentations, FDA officials probed for more perspective on issues such as how fatigue should be assessed, the differences between fatigue and brain fog, the impact of calcinosis on functioning, and how much risk patients would be willing to assume from treatments that have side effects and that may or may not modulate the disease and slow disease progression.

Most patients said in response to an FDA poll question that they definitely (almost 40%) or possibly (almost 50%) would be willing to try a hypothetical new self-injectable medication if it were shown to reduce their most impactful symptoms but had side effects.

“I think what [we’ve been hearing] today is that whether we’re working on the symptoms or the disease itself is [the key]” to patients’ risk-benefit analysis, said meeting moderator Capt. Robyn Bent, RN, MS, of the U.S. Public Health Service, and director of the PFDD.

Anita Devine, diagnosed 13 years ago with systemic sclerosis, was one of several panel members who said she would accept more bothersome treatment side effects and risks “if the gain was control of disease progression and overall quality of life ... and organ preservation.” Ms. Devine, who has needed kidney dialysis and multiple hand surgeries, noted that she previously took anti-neoplastic and anti-inflammatory agents “to try to stem the course of my disease, but unfortunately the disease did not abate.”

Treatments for systemic sclerosis include vasodilators, immunosuppressive medications, antifibrotic therapies, and stem cell transplants, Dr. Khanna said in his opening remarks.

Trials of drugs for scleroderma have focused on early disease that may be amenable to treatment, with the exception of trials for pulmonary arterial hypertension, which affects some patients with systemic sclerosis. There are multiple FDA-approved drugs for pulmonary arterial hypertension and more trials are underway.

Outcomes such as pain and fatigue are included in many of the trials currently underway, but they tend to be lower-level secondary outcomes measures that cannot be incorporated into drug labeling or are more “exploratory in nature,” Dr. Khanna said in the interview.

Dr. Khanna disclosed that he is the chief medical officer (an equity position) for CiVi Biopharma/Eicos Sciences Inc., which is developing a drug for Raynaud’s, and serves as a consultant and grant recipient for numerous companies that make or are developing drugs for systemic sclerosis.

The FDA will accept patient comments until Dec. 15, 2020, at which time comments will be compiled into a summary report, Ms. Bent said.

Patients with systemic sclerosis have variable disease progression but often experience debilitating fatigue, pain, and digestive issues – and they’re extremely concerned about progressive organ damage, according to those who spoke at and provided input at a public meeting on patient-focused drug development for the disease.

Wikimedia Commons/FitzColinGerald/ Creative Commons License

The virtual meeting was part of the Food and Drug Administration’s Patient-Focused Drug Development (PFDD) initiative, which began in 2012 and aims to provide a systematic way for patients’ experiences, needs, and priorities to be “captured and meaningfully incorporated” into drug development and evaluation.
 

Patients rate their most impactful symptoms

Dinesh Khanna, MBBS, MSc, a rheumatologist who directs a scleroderma research program at the University of Michigan, Ann Arbor, attended the meeting after giving an opening presentation on the disease to FDA officials, patients, and other participants. In a later interview, he said that patients’ ratings of their most impactful symptoms was especially striking.

Raynaud’s phenomenon, digestive symptoms, and fatigue were the top three answers to a poll question that asked patients what symptom had the most significant impact on daily life, he noted, “and none of these are being [strongly] addressed right now [in clinical trials] apart from Raynaud’s phenomenon, for which there are some trials ongoing.”

He and other researchers are “struggling with what outcomes measures to use [in their studies],” said Dr. Khanna, the Frederick G.L. Huetwell Professor of Rheumatology at the University. “My takeaway from the meeting as a clinical trialist is that we should be paying close attention to the symptoms that patients tell us are the most important. We should be including these in our trial designs as secondary endpoints, if not primary endpoints. We have not done that [thus far], really.”

Approximately 200,000 patients in the United States have scleroderma, and approximately 75,000-80,000 of these patients have systemic scleroderma, or systemic sclerosis, Dr. Khanna said in his opening presentation. Each year, he estimates, about 6,000 new diagnoses of systemic sclerosis are made.

More than 200 people – patients, FDA officials, and others – participated in the PFDD meeting. Patients participated in one of two panels – one focused on health effects and daily impacts, and the other on treatments – or submitted input electronically. All were invited to answer poll questions.

Raj Nair, MD, one of eight FDA leaders attending the meeting, noted in closing remarks that the pain experienced by patients with systemic sclerosis includes severe pain from Raynaud’s phenomenon and pain caused by digital ulcers and by calcinosis. “We heard about how paralyzing the pain from calcinosis is, and that there are very few options for alleviating this pain,” said Dr. Nair, of the division of rheumatology and transplant medicine.

Another takeaway, he said, is that the “fatigue can be severe and debilitating, leading to days where it is impossible to get out of bed,” and that digestive symptoms can also be severe. “Reflux,” he noted, “requires significant medical intervention.”
 

Patients describe their experiences

Rosemary Lyons, diagnosed with scleroderma 35 years ago, explained that while her skin is no longer hardened, she is overly sensitive to fabrics and skin care products and has difficulty with sleeping and eating. She moved away from family in the Northeast to live in the South where the climate is warmer, but even on a 90-degree night she needs a blanket and two comforters to curb the cold and attempt to sleep.

Impaired gastrointestinal motility has made food her “biggest problem” for the past 10 years, and because of GI symptoms, she can eat only one meal a day. She also experiences fainting, brain fog, and severe fatigue. On a good day, Ms. Lyons noted, she sometimes opts to do some house chores “knowing that I’ll have 1-3 days of recovery.”

Another patient, Amy Harding, said that 22 years after her scleroderma diagnosis, “the calcinosis I get in my fingers, elbows, toes, and ears tops all the prior symptoms.” The skin tightening and digital ulcers that she experienced in the first 10 years have tapered off, and while Raynaud’s symptoms and heartburn have worsened, they are at least partly manageable with medications, unlike the pain from calcinosis.
 

Treating symptoms vs. disease may be key in risk-benefit analysis

In questions after patient presentations, FDA officials probed for more perspective on issues such as how fatigue should be assessed, the differences between fatigue and brain fog, the impact of calcinosis on functioning, and how much risk patients would be willing to assume from treatments that have side effects and that may or may not modulate the disease and slow disease progression.

Most patients said in response to an FDA poll question that they definitely (almost 40%) or possibly (almost 50%) would be willing to try a hypothetical new self-injectable medication if it were shown to reduce their most impactful symptoms but had side effects.

“I think what [we’ve been hearing] today is that whether we’re working on the symptoms or the disease itself is [the key]” to patients’ risk-benefit analysis, said meeting moderator Capt. Robyn Bent, RN, MS, of the U.S. Public Health Service, and director of the PFDD.

Anita Devine, diagnosed 13 years ago with systemic sclerosis, was one of several panel members who said she would accept more bothersome treatment side effects and risks “if the gain was control of disease progression and overall quality of life ... and organ preservation.” Ms. Devine, who has needed kidney dialysis and multiple hand surgeries, noted that she previously took anti-neoplastic and anti-inflammatory agents “to try to stem the course of my disease, but unfortunately the disease did not abate.”

Treatments for systemic sclerosis include vasodilators, immunosuppressive medications, antifibrotic therapies, and stem cell transplants, Dr. Khanna said in his opening remarks.

Trials of drugs for scleroderma have focused on early disease that may be amenable to treatment, with the exception of trials for pulmonary arterial hypertension, which affects some patients with systemic sclerosis. There are multiple FDA-approved drugs for pulmonary arterial hypertension and more trials are underway.

Outcomes such as pain and fatigue are included in many of the trials currently underway, but they tend to be lower-level secondary outcomes measures that cannot be incorporated into drug labeling or are more “exploratory in nature,” Dr. Khanna said in the interview.

Dr. Khanna disclosed that he is the chief medical officer (an equity position) for CiVi Biopharma/Eicos Sciences Inc., which is developing a drug for Raynaud’s, and serves as a consultant and grant recipient for numerous companies that make or are developing drugs for systemic sclerosis.

The FDA will accept patient comments until Dec. 15, 2020, at which time comments will be compiled into a summary report, Ms. Bent said.

A recently approved agent, burosumab (Crysvita), was better than placebo across a range of efficacy outcomes for 14 predefined subgroups of adults with X-linked hypophosphatemia (XLH), new research shows.

The authors analyzed data from the initial 24-week randomized blinded phase of the pivotal phase 3 trial that led to regulatory approval of this drug in the United States in 2018 for XLH, a rare form of rickets characterized by low serum phosphorus levels, skeletal defects, pain, and stiffness.

As in the main analysis, in the subgroups, among patients who received burosumab, serum phosphorus levels were improved, and outcomes were better on the following measures: Western Ontario and McMaster Universities Arthritis Index (WOMAC) stiffness scale, the WOMAC physical function measure, and the Brief Pain Inventory (BPI), which were the main efficacy outcomes. Improvements were seen for many other outcomes as well.

Maria-Luisa Brandi, MD, Careggi University Hospital, Florence, Italy, presented the new subanalysis during the virtual American Society of Bone and Mineral Research (ASBMR) 2020 annual meeting.

The subgroup results were consistent with the overall trial findings, “showing a favorable direction of effect of burosumab relative to placebo” except for results in patients recruited in Asia and non-White patients; those results were considered inconclusive because there were too few participants in those categories, she told Medscape Medical News,.

Lorenz Hofbauer, MD, scientific chair of the ASBMR meeting, said that the take-away message is that the drug “works to reduce pain and disability” in adults with XLH with more severe/less severe symptoms, and “it provides new hope for many patients suffering from this disease,” he told Medscape Medical News.

Burosemab also appears superior to what has previously been considered standard therapy for XLH, phosphate/calcitriol, the experts say.
 

‘Rare is relative,’ burosumab is a ‘transformative therapy’

“The disease prevalence is 1 to 9 in a million,” Brandi said. “Undiagnosed adults are treated by the doctor that makes the diagnosis, usually a nephrologist or a rheumatologist or a bone doctor; this depends on the prevalent complications in a given patient. The endocrinologist who treats this patient is the one expert in bone disorders.”

Hofbauer noted, however, that “[r]are is relative. If you run a bone clinic, you will see four to five patients with XLH; if you are a regional center, 20 to 30 patients. People with rare disease travel more than 1000 miles to see experts.”

The US Food and Drug Administration approved burosumab for use in children and adults with XLH 2 years ago. The European Medicines Agency (EMA) approved it for use in children.

The drug is expected to be approved by the EMA for adults with XLH some time this year, said Hofbauer, who is from Dresden Technical University, Dresden, Germany.

Burosumab is a “game changer” with respect to previous treatments, he stressed.

This study is one of the top five clinical abstracts of the ASBMR meeting, which are selected on the basis of “scientific content/novelty, making a difference in clinical practice,” Hofbauer explained. He noted that “new drugs that work are always in the top ranks.”

Craig Munns, PhD, who was senior author of a recent review about burosumab, agrees.

“Burosumab is transformative, as it is a paradigm shift in the way we manage XLH,” he told Medscape Medical News.

“Standard therapy for children is with oral phosphate and calcitriol, and many adults do not receive any therapy,” said Munns, from the University of Sydney, Sydney, Australia.

“Phosphate and calcitriol need to be taken multiple times per day, is an incomplete therapy, and has many complications. Burosumab offers a 2-weekly (children) or 4-weekly (adult) dosing regime with superior outcomes compared to no treatment or phosphate/calcitriol,” he emphasized.
 

Efficacy in 14 predefined subgroups

“Burosumab is an anti-FGF-23 [anti–fibroblast growth factor-23] antibody for a rare genetic disease, XLH, in which the gene for PHEX is defective,” Hofbauer explained.

“PHEX is an enzyme that clears FGF-23; if it does not work, then FGF-23 accumulates in the body and causes phosphate wasting with wide consequences for bone, muscle, and joints. Burosumab is a smart approach, since it blocks these excessive FGF-23 effects.”

Children with XLH have rickets, deformities in the lower skeleton, and short stature, Brandi noted, whereas adults have fractures, pseudofractures, enthesopathy (calcification of joint capsule, tendon insertions, and ligaments), pain, stiffness, and impaired physical function.

However, “treatment with oral phosphate and vitamin D is associated with nephrocalcinosis and hyperparathyroidism,” she said.

In the phase 3 trial, 134 adults (aged 18 to 65 years) with XLH were randomly assigned in a double-blind manner to receive either burosumab or placebo for 24 weeks, followed by 24 weeks of open-label burosumab. The patients’ serum phosphorus levels were <2.5 mg/dL, and they were experiencing measurable bone/joint pain.

Baseline characteristics were similar for the patients who received placebo (66) and those who received burosumab (68). The mean age of the patients was 40 years; 65% were women; and 81% were White.

The current exploratory analysis examined efficacy outcomes in patients grouped according to the following factors and characteristics: sex; age (≤41 years or >41 years); race (non-White, White); region (Asia, North America/Europe); baseline WOMAC pain score; WOMAC total pain; WOMAC stiffness; WOMAC physical function; BPI worst pain; BPI average pain; opioid use; pain medication use; active fractures and pseudofractures; and 6-minute walking test distance.

The efficacy outcomes were as follows: serum phosphorus level (primary outcome), BPI worst pain, WOMAC stiffness, and WOMAC physical function (key secondary outcomes); and WOMAC pain, WOMAC total score, BPI average pain, BPI pain interference, BPI worst fatigue, BPI global score, patient global impression (PGI), and 6-minute walking distance.

In the overall cohort, at 24 weeks, in comparison with patients who received placebo, patients who received burosumab had favorable responses with respect to serum phosphorus level, WOMAC stiffness (P =. 012),WOMAC physical function (P = .048), and BPI worst pain (P = .092, not significant), as well as significant improvements in WOMAC total score and the 6-minute walk test. There were nonsignificant improvements in WOMAC pain and BPI average pain.

In the subgroup analysis, burosumab was superior to placebo for the primary outcome (serum phosphorus) in all subgroups. It was also superior to placebo for the key secondary outcomes (worst pain, stiffness, and physical function) across all subgroups except for patients from Asia (18 patients) and non-White patients (26).

The study was funded by Kyowa Kirin in partnership with Ultragenyx. Brandi receives consultancy and speaker fees as well as research grants from Kyowa Kirin and other pharmaceutical companies. Munns has received research funding from Kyowa Kirin.
 

This article first appeared on Medscape.com.

A recently approved agent, burosumab (Crysvita), was better than placebo across a range of efficacy outcomes for 14 predefined subgroups of adults with X-linked hypophosphatemia (XLH), new research shows.

The authors analyzed data from the initial 24-week randomized blinded phase of the pivotal phase 3 trial that led to regulatory approval of this drug in the United States in 2018 for XLH, a rare form of rickets characterized by low serum phosphorus levels, skeletal defects, pain, and stiffness.

As in the main analysis, in the subgroups, among patients who received burosumab, serum phosphorus levels were improved, and outcomes were better on the following measures: Western Ontario and McMaster Universities Arthritis Index (WOMAC) stiffness scale, the WOMAC physical function measure, and the Brief Pain Inventory (BPI), which were the main efficacy outcomes. Improvements were seen for many other outcomes as well.

Maria-Luisa Brandi, MD, Careggi University Hospital, Florence, Italy, presented the new subanalysis during the virtual American Society of Bone and Mineral Research (ASBMR) 2020 annual meeting.

The subgroup results were consistent with the overall trial findings, “showing a favorable direction of effect of burosumab relative to placebo” except for results in patients recruited in Asia and non-White patients; those results were considered inconclusive because there were too few participants in those categories, she told Medscape Medical News,.

Lorenz Hofbauer, MD, scientific chair of the ASBMR meeting, said that the take-away message is that the drug “works to reduce pain and disability” in adults with XLH with more severe/less severe symptoms, and “it provides new hope for many patients suffering from this disease,” he told Medscape Medical News.

Burosemab also appears superior to what has previously been considered standard therapy for XLH, phosphate/calcitriol, the experts say.
 

‘Rare is relative,’ burosumab is a ‘transformative therapy’

“The disease prevalence is 1 to 9 in a million,” Brandi said. “Undiagnosed adults are treated by the doctor that makes the diagnosis, usually a nephrologist or a rheumatologist or a bone doctor; this depends on the prevalent complications in a given patient. The endocrinologist who treats this patient is the one expert in bone disorders.”

Hofbauer noted, however, that “[r]are is relative. If you run a bone clinic, you will see four to five patients with XLH; if you are a regional center, 20 to 30 patients. People with rare disease travel more than 1000 miles to see experts.”

The US Food and Drug Administration approved burosumab for use in children and adults with XLH 2 years ago. The European Medicines Agency (EMA) approved it for use in children.

The drug is expected to be approved by the EMA for adults with XLH some time this year, said Hofbauer, who is from Dresden Technical University, Dresden, Germany.

Burosumab is a “game changer” with respect to previous treatments, he stressed.

This study is one of the top five clinical abstracts of the ASBMR meeting, which are selected on the basis of “scientific content/novelty, making a difference in clinical practice,” Hofbauer explained. He noted that “new drugs that work are always in the top ranks.”

Craig Munns, PhD, who was senior author of a recent review about burosumab, agrees.

“Burosumab is transformative, as it is a paradigm shift in the way we manage XLH,” he told Medscape Medical News.

“Standard therapy for children is with oral phosphate and calcitriol, and many adults do not receive any therapy,” said Munns, from the University of Sydney, Sydney, Australia.

“Phosphate and calcitriol need to be taken multiple times per day, is an incomplete therapy, and has many complications. Burosumab offers a 2-weekly (children) or 4-weekly (adult) dosing regime with superior outcomes compared to no treatment or phosphate/calcitriol,” he emphasized.
 

Efficacy in 14 predefined subgroups

“Burosumab is an anti-FGF-23 [anti–fibroblast growth factor-23] antibody for a rare genetic disease, XLH, in which the gene for PHEX is defective,” Hofbauer explained.

“PHEX is an enzyme that clears FGF-23; if it does not work, then FGF-23 accumulates in the body and causes phosphate wasting with wide consequences for bone, muscle, and joints. Burosumab is a smart approach, since it blocks these excessive FGF-23 effects.”

Children with XLH have rickets, deformities in the lower skeleton, and short stature, Brandi noted, whereas adults have fractures, pseudofractures, enthesopathy (calcification of joint capsule, tendon insertions, and ligaments), pain, stiffness, and impaired physical function.

However, “treatment with oral phosphate and vitamin D is associated with nephrocalcinosis and hyperparathyroidism,” she said.

In the phase 3 trial, 134 adults (aged 18 to 65 years) with XLH were randomly assigned in a double-blind manner to receive either burosumab or placebo for 24 weeks, followed by 24 weeks of open-label burosumab. The patients’ serum phosphorus levels were <2.5 mg/dL, and they were experiencing measurable bone/joint pain.

Baseline characteristics were similar for the patients who received placebo (66) and those who received burosumab (68). The mean age of the patients was 40 years; 65% were women; and 81% were White.

The current exploratory analysis examined efficacy outcomes in patients grouped according to the following factors and characteristics: sex; age (≤41 years or >41 years); race (non-White, White); region (Asia, North America/Europe); baseline WOMAC pain score; WOMAC total pain; WOMAC stiffness; WOMAC physical function; BPI worst pain; BPI average pain; opioid use; pain medication use; active fractures and pseudofractures; and 6-minute walking test distance.

The efficacy outcomes were as follows: serum phosphorus level (primary outcome), BPI worst pain, WOMAC stiffness, and WOMAC physical function (key secondary outcomes); and WOMAC pain, WOMAC total score, BPI average pain, BPI pain interference, BPI worst fatigue, BPI global score, patient global impression (PGI), and 6-minute walking distance.

In the overall cohort, at 24 weeks, in comparison with patients who received placebo, patients who received burosumab had favorable responses with respect to serum phosphorus level, WOMAC stiffness (P =. 012),WOMAC physical function (P = .048), and BPI worst pain (P = .092, not significant), as well as significant improvements in WOMAC total score and the 6-minute walk test. There were nonsignificant improvements in WOMAC pain and BPI average pain.

In the subgroup analysis, burosumab was superior to placebo for the primary outcome (serum phosphorus) in all subgroups. It was also superior to placebo for the key secondary outcomes (worst pain, stiffness, and physical function) across all subgroups except for patients from Asia (18 patients) and non-White patients (26).

The study was funded by Kyowa Kirin in partnership with Ultragenyx. Brandi receives consultancy and speaker fees as well as research grants from Kyowa Kirin and other pharmaceutical companies. Munns has received research funding from Kyowa Kirin.
 

This article first appeared on Medscape.com.

A recently approved agent, burosumab (Crysvita), was better than placebo across a range of efficacy outcomes for 14 predefined subgroups of adults with X-linked hypophosphatemia (XLH), new research shows.

The authors analyzed data from the initial 24-week randomized blinded phase of the pivotal phase 3 trial that led to regulatory approval of this drug in the United States in 2018 for XLH, a rare form of rickets characterized by low serum phosphorus levels, skeletal defects, pain, and stiffness.

As in the main analysis, in the subgroups, among patients who received burosumab, serum phosphorus levels were improved, and outcomes were better on the following measures: Western Ontario and McMaster Universities Arthritis Index (WOMAC) stiffness scale, the WOMAC physical function measure, and the Brief Pain Inventory (BPI), which were the main efficacy outcomes. Improvements were seen for many other outcomes as well.

Maria-Luisa Brandi, MD, Careggi University Hospital, Florence, Italy, presented the new subanalysis during the virtual American Society of Bone and Mineral Research (ASBMR) 2020 annual meeting.

The subgroup results were consistent with the overall trial findings, “showing a favorable direction of effect of burosumab relative to placebo” except for results in patients recruited in Asia and non-White patients; those results were considered inconclusive because there were too few participants in those categories, she told Medscape Medical News,.

Lorenz Hofbauer, MD, scientific chair of the ASBMR meeting, said that the take-away message is that the drug “works to reduce pain and disability” in adults with XLH with more severe/less severe symptoms, and “it provides new hope for many patients suffering from this disease,” he told Medscape Medical News.

Burosemab also appears superior to what has previously been considered standard therapy for XLH, phosphate/calcitriol, the experts say.
 

‘Rare is relative,’ burosumab is a ‘transformative therapy’

“The disease prevalence is 1 to 9 in a million,” Brandi said. “Undiagnosed adults are treated by the doctor that makes the diagnosis, usually a nephrologist or a rheumatologist or a bone doctor; this depends on the prevalent complications in a given patient. The endocrinologist who treats this patient is the one expert in bone disorders.”

Hofbauer noted, however, that “[r]are is relative. If you run a bone clinic, you will see four to five patients with XLH; if you are a regional center, 20 to 30 patients. People with rare disease travel more than 1000 miles to see experts.”

The US Food and Drug Administration approved burosumab for use in children and adults with XLH 2 years ago. The European Medicines Agency (EMA) approved it for use in children.

The drug is expected to be approved by the EMA for adults with XLH some time this year, said Hofbauer, who is from Dresden Technical University, Dresden, Germany.

Burosumab is a “game changer” with respect to previous treatments, he stressed.

This study is one of the top five clinical abstracts of the ASBMR meeting, which are selected on the basis of “scientific content/novelty, making a difference in clinical practice,” Hofbauer explained. He noted that “new drugs that work are always in the top ranks.”

Craig Munns, PhD, who was senior author of a recent review about burosumab, agrees.

“Burosumab is transformative, as it is a paradigm shift in the way we manage XLH,” he told Medscape Medical News.

“Standard therapy for children is with oral phosphate and calcitriol, and many adults do not receive any therapy,” said Munns, from the University of Sydney, Sydney, Australia.

“Phosphate and calcitriol need to be taken multiple times per day, is an incomplete therapy, and has many complications. Burosumab offers a 2-weekly (children) or 4-weekly (adult) dosing regime with superior outcomes compared to no treatment or phosphate/calcitriol,” he emphasized.
 

Efficacy in 14 predefined subgroups

“Burosumab is an anti-FGF-23 [anti–fibroblast growth factor-23] antibody for a rare genetic disease, XLH, in which the gene for PHEX is defective,” Hofbauer explained.

“PHEX is an enzyme that clears FGF-23; if it does not work, then FGF-23 accumulates in the body and causes phosphate wasting with wide consequences for bone, muscle, and joints. Burosumab is a smart approach, since it blocks these excessive FGF-23 effects.”

Children with XLH have rickets, deformities in the lower skeleton, and short stature, Brandi noted, whereas adults have fractures, pseudofractures, enthesopathy (calcification of joint capsule, tendon insertions, and ligaments), pain, stiffness, and impaired physical function.

However, “treatment with oral phosphate and vitamin D is associated with nephrocalcinosis and hyperparathyroidism,” she said.

In the phase 3 trial, 134 adults (aged 18 to 65 years) with XLH were randomly assigned in a double-blind manner to receive either burosumab or placebo for 24 weeks, followed by 24 weeks of open-label burosumab. The patients’ serum phosphorus levels were <2.5 mg/dL, and they were experiencing measurable bone/joint pain.

Baseline characteristics were similar for the patients who received placebo (66) and those who received burosumab (68). The mean age of the patients was 40 years; 65% were women; and 81% were White.

The current exploratory analysis examined efficacy outcomes in patients grouped according to the following factors and characteristics: sex; age (≤41 years or >41 years); race (non-White, White); region (Asia, North America/Europe); baseline WOMAC pain score; WOMAC total pain; WOMAC stiffness; WOMAC physical function; BPI worst pain; BPI average pain; opioid use; pain medication use; active fractures and pseudofractures; and 6-minute walking test distance.

The efficacy outcomes were as follows: serum phosphorus level (primary outcome), BPI worst pain, WOMAC stiffness, and WOMAC physical function (key secondary outcomes); and WOMAC pain, WOMAC total score, BPI average pain, BPI pain interference, BPI worst fatigue, BPI global score, patient global impression (PGI), and 6-minute walking distance.

In the overall cohort, at 24 weeks, in comparison with patients who received placebo, patients who received burosumab had favorable responses with respect to serum phosphorus level, WOMAC stiffness (P =. 012),WOMAC physical function (P = .048), and BPI worst pain (P = .092, not significant), as well as significant improvements in WOMAC total score and the 6-minute walk test. There were nonsignificant improvements in WOMAC pain and BPI average pain.

In the subgroup analysis, burosumab was superior to placebo for the primary outcome (serum phosphorus) in all subgroups. It was also superior to placebo for the key secondary outcomes (worst pain, stiffness, and physical function) across all subgroups except for patients from Asia (18 patients) and non-White patients (26).

The study was funded by Kyowa Kirin in partnership with Ultragenyx. Brandi receives consultancy and speaker fees as well as research grants from Kyowa Kirin and other pharmaceutical companies. Munns has received research funding from Kyowa Kirin.
 

This article first appeared on Medscape.com.