Open Access

Amy S. Paller, Lawrence F. Eichenfield, Alan D. Irvine, Carsten Flohr, Andreas Wollenberg, Sébastien Barbarot, Christine Bangert, Jonathan M. Spergel, Andrew Selfridge, Pinaki Biswas, Haiyun Fan, Justine Alderfer, Melissa Watkins, Herwig Koppensteiner

• Background Abrocitinib has demonstrated long-term efficacy (48 weeks) and safety (~4 years) in adults and adolescents with moderate-to-severe atopic dermatitis (AD). This analysis evaluated abrocitinib efficacy in adolescents through 112 weeks, and safety of up to 4.6 years of exposure. Methods Data were from adolescents in JADE MONO-1 (NCT03349060), MONO-2 (NCT03575871), TEEN (NCT03796676), REGIMEN (NCT03627767; safety analysis only), and the ongoing phase 3 extension trial, EXTEND (NCT03422822; data cutoff: September 5, 2022). Efficacy assessments included proportions of patients achieving an Investigator's Global Assessment score of 0 or 1 (IGA 0/1) and ≥ 75%/≥ 90% improvement in Eczema Area and Severity Index (EASI-75/-90). Treatment-emergent adverse events (TEAEs) and AEs of special interest were reported as incidence rate/100 patient-years. A substudy of JADE TEEN assessed immune response to vaccination. Results Efficacy was assessed in 170 and 187 patients in theBackground Abrocitinib has demonstrated long-term efficacy (48 weeks) and safety (~4 years) in adults and adolescents with moderate-to-severe atopic dermatitis (AD). This analysis evaluated abrocitinib efficacy in adolescents through 112 weeks, and safety of up to 4.6 years of exposure. Methods Data were from adolescents in JADE MONO-1 (NCT03349060), MONO-2 (NCT03575871), TEEN (NCT03796676), REGIMEN (NCT03627767; safety analysis only), and the ongoing phase 3 extension trial, EXTEND (NCT03422822; data cutoff: September 5, 2022). Efficacy assessments included proportions of patients achieving an Investigator's Global Assessment score of 0 or 1 (IGA 0/1) and ≥ 75%/≥ 90% improvement in Eczema Area and Severity Index (EASI-75/-90). Treatment-emergent adverse events (TEAEs) and AEs of special interest were reported as incidence rate/100 patient-years. A substudy of JADE TEEN assessed immune response to vaccination. Results Efficacy was assessed in 170 and 187 patients in the abrocitinib 200-mg and 100-mg arms, respectively; median exposure was 971.0 and 899.0 days. At Week 112, comparable proportions of patients treated with abrocitinib (200, 100 mg) achieved EASI-75 (85%, 83%), EASI-90 (62%, 60%), and IGA 0/1 (57%, 57%). Safety was assessed in 289 and 201 patients in the abrocitinib 200- and 100-mg arms, respectively; median exposure was 882.0 and 863.0 days. Incidence rates were numerically higher with abrocitinib 200 mg versus 100 mg, with overlapping confidence intervals for serious TEAEs (IR [95% CI]; 5.47 [3.69–7.80] vs. 3.45 [1.89–5.80]) and TEAEs leading to discontinuation (6.78 [4.80–9.31] vs. 5.39 [3.38–8.16]). Conclusions Efficacy and safety results support long-term abrocitinib use in adolescent patients. Trail Registration ClinicalTrials.gov Identifiers NCT03349060, NCT03575871, NCT03796676, NCT03627767, NCT03422822.…