Interim Results from Phase 1b/2 Study Evaluating the Combination of Merck’s KEYTRUDA® (pembrolizumab) and Eisai’s HALAVEN® (eribulin mesylate) Injection in Metastatic Triple-Negative Breast Cancer


“Merck (NYSE: MRK), known as MSD outside the United States and Canada, and Eisai Inc. today announced new interim data investigating Merck’s anti-PD-1 therapy, KEYTRUDA® (pembrolizumab), in combination with Eisai’s microtubule dynamics inhibitor, HALAVEN® (eribulin) in patients with metastatic triple-negative breast cancer (TNBC). Findings presented during the 2016 San Antonio Breast Cancer Symposium (SABCS) were based on interim data from 39 evaluable patients and showed an overall response rate (ORR) of 33.3% (n=13/39; 95% CI, 19.5-48.1), with one complete response and 12 partial responses (Abstract #: P5-15-02). ORR was similar between PD-L1-positive and -negative cohorts [PD-L1 positive=29.4% (n=5/17; 95% CI, 11.1-51.1); PD-L1 negative=33.3% (n=6/18; 95% CI, 14.1-54.6)]. HALAVEN and KEYTRUDA are not approved for use in combination.”

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