ORLANDO – Treatment with dupilumab in children and adolescents with moderate to severe atopic dermatitis (AD) reduced severity and pruritus scores from baseline and was well tolerated, in a multicenter, open-label trial of 78 children and adolescents.
Dupilumab’s “powerful ability” to block interleukin-4 and interleukin-13 pathways of inflammation is “especially exciting because AD is even more Th-2 cell driven in children,” said Michael J. Cork, MD, PhD, head of dermatologic research at the University of Sheffield (England), who presented the findings during a late-breaking research session at the annual meeting of the American Academy of Dermatology.
The study assessed the pharmacokinetics, safety, and efficacy of dupilumab and was conducted with 38 children, aged 6-11 years, and 40 adolescents, aged 12-17 years, with moderate to severe AD. All had failed topical corticosteroid therapy. Some of the children (16%) and adolescents (22.5%) had failed at least one systemic therapy.
Both age groups were given either a 2 mg/kg or a 4 mg/kg dose of dupilumab (administered subcutaneously), nothing for 8 weeks, followed by 4 weekly doses of their respective regimens. Mean Eczema Area and Severity Index (EASI) scores at baseline were 31.7 among the adolescents and 35.9 among the children.
At week 12, mean scores in the younger cohort given either 2 mg/kg or 4 mg/kg had improved by 76.2% and 63.4%, respectively, from baseline. In the adolescents, EASI scores at week 12 had improved by a mean of 66.4% in the 2-mg/kg group and 69.7% in the 4-mg/kg group.
Itch also improved “dramatically,” according to Dr. Cork. In the younger children, peak pruritus Numerical Rating Scale scores improved from baseline by a mean of 41.6% in the lower-dose group and 39.6% in the higher-dose group. In the older cohort, pruritus scores improved from baseline by a mean of 30.8% in the lower-dose group and 37.6% in the higher-dose group.
Treatment was well tolerated across the study, and adverse events were “mild, transient, and unrelated,” Dr. Cork said. “I would like to emphasize that these were not related to dupilumab, as they occurred during the period of time after the first dose, in weeks 6 and 7,” he commented. He attributed AD flares experienced in the study to the quick clearance of the drug in the first few weeks.
Dr. Cork reported numerous disclosures, including serving as an adviser, consultant, and investigator for Regeneron, the sponsor of the trial, and Sanofi; the companies developing dupilumab.
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