Concert Pharmaceuticals Inc. is on track for an NDA filing for CTP-543 in alopecia areata during the first half of 2023, following a positive read-out from the first of two phase III trials of the oral Janus kinase 1/2 inhibitor. The molecule hit the primary endpoint of the placebo-controlled Thrive-AA1 study, which was defined as the percentage of patients achieving a SALT (Severity of Alopecia Assessment Tool) score of 20 or less after 24 weeks of therapy.
New top-line results from the phase IIb/III Allegro trial of Pfizer Inc.'s once-daily oral JAK3 inhibitor, ritlecitinib, have met the trial's primary efficacy endpoint of improving scalp hair regrowth in patients with alopecia areata vs. placebo. The new data, to be paired with long-term trial results from Pfizer's long-term Allegro-LT study, move the program one step closer to an expected early 2022 NDA filing.
Concert Pharmaceuticals Inc. CEO Roger Tung said determining who leads isn’t easy in the phase III race that pits his firm against Eli Lilly and Co. and Pfizer Inc. in alopecia areata. That’s because neither of the other companies has “been very direct about the timelines they’re on,” he told BioWorld. “We’ve been pretty clear that our goal is to have an NDA filing in early 2023.”
Recently published findings in JAMA Psychiatry related to the sharply increased risk of death from COVID-19 in people with schizophrenia put the spotlight on drug development in the space, which has been steadily heating up the past few years.
Concert Pharmaceuticals Inc. is scratching further work on CTP-692 after the deuterated form of D-serine missed the primary endpoint in a phase II study in schizophrenia. The news sent shares of Concert (NASDAQ:CNCE) falling 28% Feb. 1 and shifts focus to the firm’s sole remaining clinical-stage program in the competitive alopecia areata space.
