Long-Acting Anti-TSLP Antibody HBM9378/WIN378 Enters Global Phase 2 Trial for Asthma Treatment
- Windward Bio has initiated the global Phase 2 POLARIS trial evaluating HBM9378/WIN378, a long-acting anti-TSLP monoclonal antibody for asthma treatment, with initial data expected in mid-2026.
- The fully human antibody targets thymic stromal lymphopoietin (TSLP) and has been engineered for extended half-life with potential twice-yearly dosing, addressing the need for more effective long-acting treatments.
- HBM9378/WIN378 demonstrated extended half-life, low antidrug antibody incidence, and good safety profile in Phase 1 trials, with additional COPD clinical programs planned for 2026.
- The therapy represents a collaborative effort between Harbour BioMed and Kelun-Biotech, with Windward Bio holding exclusive global licensing rights outside Greater China and select Asian countries.