Phase III MONARCH 3 study of Verzenio (abemaciclib) to treat postmenopausal women with advanced breast cancer is published in Jo.Clinical Oncology. -Eli Lilly.

Eli Lilly and Company announced that interim results from the double-blind, placebo-controlled Phase III MONARCH 3 study evaluating Verzenio (abemaciclib), a cyclin-dependent kinase (CDK)4 & 6 inhibitor, in combination with a nonsteroidal aromatase inhibitor (NSAI) (anastrozole or letrozole) were published online in the Journal of Clinical Oncology (JCO).

These data, presented at the European Society for Medical Oncology (ESMO) 2017 Congress in September, demonstrated that abemaciclib plus an NSAI resulted in a statistically significant improvement in progression-free survival (PFS) and objective response rate (ORR) compared to an NSAI alone in women with hormone-receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2-) advanced breast cancer. MONARCH 3 met a rigorous threshold for demonstrating efficacy at the time of pre-planned interim analysis with a 46 percent reduction in the risk of progression or death in patients receiving initial therapy for metastatic disease. The median PFS for abemaciclib in combination with an NSAI was not reached (i.e., the disease had not progressed significantly), compared to 14.7 months in the placebo arm (HR: 0.54; 95% CI: 0.41-0.72; P=0.000021). These results are supported by an improvement in response rate, with a 59.2 percent ORR in patients with measurable disease, including five patients (1.5%) achieving a complete response. Median duration of response (DoR) was not reached in the abemaciclib-plus-NSAI arm. Final PFS results are expected at the end of the year and will be presented at a scientific congress in the first half of 2018.