Upstream Bio, Inc.Upstream Bio announced pivotal Phase 3 development plans for verekitug in severe asthma and CRSwNP following productive FDA End-of-Phase 2 meetings.

Upstream Bio, a clinical-stage company developing treatments for severe inflammatory respiratory diseases, announced pivotal Phase 3 development plans for verekitug in severe asthma and chronic rhinosinusitis with nasal polyps (CRSwNP). Following productive End-of-Phase 2 meetings with the U.S. FDA, the company will study a single high-dose subcutaneous regimen of 400 mg administered every 12 weeks, versus placebo, in one pivotal Phase 3 trial for each indication. The two trials will enroll a total of approximately 1,500 patients across both studies, with broad patient populations unrestricted by baseline biomarkers. Primary endpoints include annualized asthma exacerbation rate over 48 weeks for asthma, and change from baseline in nasal polyp score and nasal congestion score at 48 weeks for CRSwNP. Upstream Bio remains on track to initiate both Phase 3 trials in the first quarter of 2027, and with supportive results, expects to submit a Biologics License Application to the FDA for both indications, potentially enabling launch as early as 2030.
Upstream Bio, Inc.Upstream Bio announced pivotal Phase 3 development plans for verekitug in severe asthma and CRSwNP following productive FDA End-of-Phase 2 meetings.