Core Insights - Upstream Bio, Inc. announced positive top-line results from the Phase 2 VIBRANT trial for verekitug, demonstrating significant efficacy in treating chronic rhinosinusitis with nasal polyps (CRSwNP) [1][6][12] Study Results - The VIBRANT trial met its primary endpoint with a statistically significant placebo-adjusted reduction in endoscopic nasal polyp score (NPS) of -1.8 (p<0.0001) at Week 24 [1][4] - Key secondary endpoints showed a reduction in nasal congestion score (NCS) by -0.8 (p=0.0003) and a 76% reduction (p=0.03) in the need for surgery or systemic corticosteroids [1][2][5] - The trial involved 81 adults and was designed as a global, randomized, double-blind, placebo-controlled study over 24 weeks [3][12] Safety Profile - Verekitug was generally well tolerated, with no serious adverse events (SAEs) reported, consistent with previous studies [1][5][6] Mechanism and Potential - Verekitug is a monoclonal antibody targeting the thymic stromal lymphopoietin (TSLP) receptor, which is unique in its mechanism of action compared to existing therapies [1][13][18] - The results suggest that verekitug could advance the standard of care for CRSwNP and may have potential applications in other respiratory diseases, including severe asthma [6][7][18] Future Plans - Upstream Bio plans to engage with global regulatory authorities for further development and potential product approval of verekitug [7][12] - The company will present additional details from the VIBRANT trial at an upcoming medical conference [8]