AT AAD 2017
ORLANDO (FRONTLINE MEDICAL NEWS) – Treatment with dupilumab was associated with significantly improved measures of disease severity, including in quality of life and pruritus symptoms, at 16 and 52 weeks in adults with moderate to severe atopic dermatitis (AD) in the phase III CHRONOS trial.
In the CHRONOS study of adults with uncontrolled, moderate to severe AD, patients were treated with the investigational biologic dupilumab (Dupixent), an interleukin-4 and interleukin-13 pathway blocker administered in subcutaneous injections, in combination with topical corticosteroids. At 52 weeks, they had achieved significantly improved measures of overall disease severity, compared with those who received corticosteroids alone, according to Andrew Blauvelt, MD, MBA , president of Oregon Medical Research Center, Portland, who presented the new data from the study in a late-breaking clinical session at the annual meeting of the American Academy of Dermatology.
In the study, 740 mostly male patients in their mid-30s or 40s, who had moderate to severe AD for an average of 26 years, were randomized 3:1:3, respectively, to 300 mg dupilumab once weekly, 300 mg dupilumab biweekly, or placebo. All three groups received topical corticosteroids. Results from the trial, reported in 2016, showed significantly higher rates of clear or almost clear skin (immunoglobulin A of 0 or 1) and significantly higher rates of EASI 75 (at least a 75% reduction in the Eczema Assessment Severity Index). scores achieved at 16 and 52 weeks among those treated with dupilumab every week or every 2 weeks plus topical corticosteroids, compared with those treated with topical corticosteroids alone.
The new 52-week data presented at AAD show that the mean improvement in the EASI score from baseline was 80% in the 300 mg dupilumab every week plus corticosteroid group (group 1) and 78% in the group treated every 2 weeks (group 2), compared with 46% in the placebo plus corticosteroids group (control) (P less than .0001).
The mean improvement in self-reported itch from baseline, as measured by the Pruritus Numerical Rating Scale, was 54% in the first group, 56% in the second group, compared with 27% in controls (P less than .0001).
In the first group, 65% achieved a 4-point or greater improvement in their Patient Oriented Eczema Measure scores, as did 76% of the second group, compared with 26% of controls (P less than .0001).
At least a 4-point improvement over baseline in Dermatology Life Quality Index scores was seen in 63% of group 1, 80% of group 2, and 30% of controls (P less than .0001).
Adverse events across the study were similar, although the treatment groups had higher incidences of injection site reactions: 19% in group 1 and 15% in group 2, compared with 8% in controls. The treatment groups also had higher rates of conjunctivitis: 19% in group 1 and 14% in group 2, compared with 8% in controls.
Dr. Blauvelt said that patients who were “exited from the trial were continued for follow-up” and that rescue therapies such as cyclosporine, and other systemic agents, were also available. The rate of rescue therapy was about 15% in the first two groups, while half of controls needed rescue therapy. “We considered those patients who needed rescue nonresponders,” he noted.
The dropout rate at week 52 was about 15% across the treatment groups, compared with twice that in controls.
“Atopic dermatitis is the new psoriasis. We’re in an exciting area now, and we’ll be seeing more biologic therapies for moderate to severe atopic dermatitis. We have a tremendous need for this,” Dr. Blauvelt commented.
The Food and Drug Administration is expected to make a decision on approval of dupilumab by March 29, 2017. Dupilumab was designated by the FDA as a breakthrough therapy for uncontrolled, moderate to severe AD in 2014.
Dr. Blauvelt disclosed many pharmaceutical industry relationships, including with Regeneron Pharmaceuticals and Sanofi, which are developing dupilumab. (If approved, Regeneron and Sanofi Genzyme, part of Sanofi, will commercialize dupilumab).
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