Introduction:This clinical trial aimed to assess the safety, pharmacokinetics (PK), and pharmacodynamics (PD) of LW402, a preferential JAK1 inhibitor, in healthy participants, so as to provide support for its further development in treating autoimmune diseases.
Methods:The study included two phases: a single ascending dose (10-400 mg) with 54 participants and a multiple ascending dose (50-150 mg, b.i.d for 6 days plus a single dose on day 7) with 36 participants. Safety, PK (from timed blood samples), and PD (JAK1/JAK2 signaling) were evaluated.
Results:No serious adverse events were reported; only mild treatment-emergent adverse events (TEAEs), such as sinus bradycardia and gastrointestinal issues, occurred. LW402 was rapidly absorbed (median tmax: 0.42-1.0 hours), with slightly super-proportional exposure and minimal accumulation, and preferentially inhibited JAK1-mediated signaling.
Discussion:LW402's favorable safety profile, predictable PK characteristics, and selective JAK1 inhibition collectively support its continued development for the treatment of autoimmune diseases.
Clinical Trial Registration:http://www.chinadrugtrials.org.cn, identifier CTR20201897.