Hair Growth Sustained With Ritlecitinib

TOPLINE:

Treatment with ritlecitinib sustained hair regrowth through week 48 in patients with alopecia areata (AA), and up to one third of nonresponders at week 24 also achieved responses by week 48.

METHODOLOGY:

• Researchers conducted a post hoc analysis of an international, randomized, double-blind, placebo-controlled, phase 2b/3 trial (ALLEGRO) and included 718 adults and adolescents aged 12 or older with severe AA (Severity of Alopecia Tool [SALT] score ≥ 50).
• Patients received various doses of the oral Janus kinase inhibitor ritlecitinib, with or without a 4-week loading dose, including 200/50 mg, 200/30 mg, 50 mg, or 30 mg, with or without a 4-week loading dose for up to 24 weeks and continued to receive their assigned maintenance dose.
• Researchers assessed sustained clinical responses at week 48 for those who had achieved SALT scores ≤ 20 and ≤ 10 at 24 weeks, and nonresponders at week 24 were assessed for responses through week 48.
• Adverse events were also evaluated.

TAKEAWAY:

• Among patients on ritlecitinib who had responded at week 24, SALT responses ≤ 20 were sustained in 85.2%-100% of patients through week 48. Similar results were seen among patients who achieved a SALT score ≤ 10 (68.8%-91.7%) and improvements in eyebrow (70.4%-96.9%) or eyelash (52.4%-94.1%) assessment scores.
• Among those who were nonresponders at week 24, 22.2%-33.7% achieved a SALT score ≤ 20 and 19.8%-25.5% achieved a SALT score ≤ 10 by week 48. Similarly, among those with no eyebrow or eyelash responses at week 24, 19.7%-32.8% and 16.7%-30.2% had improved eyebrow or eyelash assessment scores, respectively, at week 48.
• Between weeks 24 and 48, adverse events were reported in 74%-93% of patients who achieved a SALT score ≤ 20, most were mild or moderate; two serious events were reported but deemed unrelated to treatment. The safety profile was similar across all subgroups.
• No deaths, malignancies, major cardiovascular events, opportunistic infections, or herpes zoster infections were observed.

IN PRACTICE:

“The majority of ritlecitinib-treated patients with AA who met target clinical response based on scalp, eyebrow, or eyelash regrowth at week 24 sustained their response through week 48 with continued treatment,” the authors wrote. “Some patients, including those with more extensive hair loss, may require ritlecitinib treatment beyond 6 months to achieve target clinical response,” they added.

SOURCE:

The study was led by Melissa Piliang, MD, of the Department of Dermatology, Cleveland Clinic, Cleveland, and was published online on October 17 in the Journal of the American Academy of Dermatology.

LIMITATIONS:

The analysis was limited by its post hoc nature, small sample size in each treatment group, and a follow-up period of only 48 weeks.

DISCLOSURES:

This study was funded by Pfizer. Piliang disclosed being a consultant or investigator for Pfizer, Eli Lilly, and Procter & Gamble. Six authors were employees or shareholders of or received salary from Pfizer. Other authors also reported financial relationships with pharmaceutical companies outside this work, including Pfizer.

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.