By: Lauren Dembeck
Neoadjuvant treatment with the PARP inhibitor (PARPi) niraparib combined with the anti–PD-1 antibody dostarlimab achieved a 50% pathologic complete response (pCR) rate in patients with germline BRCA –mutated triple-negative breast cancer (TNBC), according to results from the phase 2 TBCRC 056 trial presented at the San Antonio Breast Cancer Symposium (SABCS) 2025. The chemotherapy-free regimen also produced a rapid and significant increase in stromal tumor-infiltrating lymphocytes (sTILs), supporting an immune-priming effect of PARP inhibition in this setting.






