Ascletis' Oral ASC50 Cuts Psoriasis Severity 48.9% in Phase I Trial
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Hong Kong – – September 28, 2026 -- Ascletis Pharma Inc. (HKEX: 1672) reported a 48.9% placebo-adjusted reduction in psoriasis area and severity index (PASI) scores from a 28-day U.S. proof-of-concept trial of ASC50, an oral small molecule IL-17A inhibitor positioned as a needle-free alternative to injectable antibody therapies for plaque psoriasis.
Once-daily 200 mg dosing matched published efficacy benchmarks for injectable IL-17A antibody secukinumab
The randomized, double-blind, placebo-controlled Phase I study (NCT07024602) enrolled mild-to-moderate plaque psoriasis patients who received once-daily 200 mg oral ASC50 for 28 days. Ascletis said the PASI reduction was comparable to published secukinumab data, though the comparison was not conducted head-to-head.