Towards a “Chemo-Sparing” Era: I-SPY 2.2 Study Explores the Precision Benefits of the Combination of Immune Bispecific Antibody and ADC in High-Risk HER2-Negative Breast Cancer
At the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting, Professor Ciara Catherine O'Sullivan from Mayo Clinic, representing the I-SPY 2.2 collaborator group, announced the neoadjuvant treatment results of Rilvegostomig (an anti-PD-1/TIGIT bispecific antibody) combined with Trastuzumab Deruxtecan (T-DXd) for early-stage high-risk HER2-negative breast cancer. Based on innovative Response Predictive Subtypes (RPS), the study aims to improve the pathological complete response (pCR) rate through precise drug combinations and explore the possibility of reducing traditional cytotoxic chemotherapy.







