TSLP receptor

Upstream Bio (UPB) presented data at the European Respiratory Society Congress showcasing verekitug’s mechanism of action. Verekitug prevents TSLP binding by occupying receptor sites and outcompetes TSLP even with preformed receptor complexes. This supports its potential for treating TSLP-driven respiratory diseases. Phase 2 data in CRSwNP showed significant improvements. A Phase 2 readout in severe asthma is expected in Q1 2026. Verekitug’s high affinity and inhibition of the TSLP receptor could lead to less frequent dosing than current therapies.

Upstream Bio announced promising data on verekitug, a lead candidate targeting the TSLP receptor, presented at the EAACI Congress. Modeling data suggests enhanced potency compared to tezepelumab, potentially offering a differentiated profile across inflammatory diseases like asthma, COPD, and CRSwNP. Phase 2 trials for CRSwNP are expected in Q3 2025, followed by severe asthma data in 2026’s first half.