“The combination of abemaciclib (Verzenio) and pembrolizumab (Keytruda) showed preliminary signs of activity without additive toxicity for patients with pretreated HR-positive, HER2-negative metastatic breast cancer, according to early results from a pilot trial presented in a poster at the 2017 San Antonio Breast Cancer Symposium (SABCS).
“At a 16-week analysis, the objective response rate (ORR) with the combination was 14.3%, which was less than the response rate seen with single-agent abemaciclib in the MONARCH-1 trial (19.7%). However, the trial investigators noted that the median time to response for abemaciclib has historically been 3.7 months, suggesting the efficacy is likely to improve with longer follow-up. At 16 weeks, the ORR in the MONARCH-1 trial was 6.8%.”
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