Immuno-Oncology

breast cancer

The addition of immunotherapy to the triple-negative breast cancer (TNBC) armamentarium has led to a paradigm shift and sparked an abundance of research with immuno-oncology (IO) drugs in new combinations and settings, explained Hope S. Rugo, MD.

There are multiple factors in making "cold" breast cancer tumors "hot," meaning that they respond to chemotherapy, explained Hope S. Rugo, MD, FASCO, director of Breast Oncology and Clinical Trials Education at the University of California San Francisco (UCSF) Helen Diller Family Comprehensive Cancer Center.

The frontline combination of pembrolizumab (Keytruda) and chemotherapy significantly improved progression-free survival (PFS) compared with chemotherapy alone in patients with metastatic triple-negative breast cancer (TNBC) whose tumors expressed PD-L1 (combined positive score [CPS] ≥10), meeting one of the dual primary endpoints of the phase III KEYNOTE-355 trial.

Nearly 1 year following the first checkpoint inhibitor approval in advanced triple-negative breast cancer, additional immunotherapeutic agents are poised to enter the field, according to Rita Nanda, MD.