SABCS 2017 - Breast Cancer

A comparison of the relative efficacy of combination hormone therapies in hormone receptor‒ positive/HER2-negative metastatic breast cancer (MBC) suggests that everolimus/exemestane may be the most effective treatment option available.
Triplet therapy consisting of an mTOR inhibitor, a CDK4/6 inhibitor, and an estrogen receptor (ER) antagonist such as fulvestrant may be optimal in treating hormone receptor–positive metastatic breast cancer, especially in the setting of CDK4/6-resistant tumors.
Radius Health, Inc. (Nasdaq:RDUS) today provided an update on data from the Phase 1 005 clinical study of elacestrant (RAD1901), an oral selective estrogen receptor degrader (SERD), in patients with estrogen receptor positive (ER+) breast cancer. The data were presented at a Spotlight Presentation (Abstract 1410) during the 2017 San Antonio Breast Cancer Symposium (SABCS). Elacestrant recently received Fast Track designation from the U.S. Food and Drug Administration.
The combination of abemaciclib plus anastrozole is superior to anastrozole alone in reducing Ki67 across a spectrum of subgroups of patients with hormone receptor (HR)-positive, HER2-negative breast cancer.
Abemaciclib, but not ribociclib or palbociclib, exhibits inhibition of CDK4/6 plus kinases other than CDK4/6, and induces cell death rather than cytostasis, which may be therapeutically advantageous in patients with hormone receptor‒positive breast cancer that is generally resistant to CDK4/6 inhibitors.
Researchers have identified a CDK4/6 inhibitor–sensitive E2F4 gene expression signature in estrogen receptor (ER)-positive breast cancers resistant to aromatase inhibitors that can potentially identify patients with ER-positive breast cancer who are candidates for adjuvant therapy with CDK4/6 inhibitors in combination with antiestrogens.
Dr Matthew Goetz reviews what differentiates abemaciclib, the latest CDK4/6 inhibitor FDA-approved for HR+ metastatic breast cancer, from ribociclib and palbociclib.
Dr Hope Rugo provides an overview of some hot topics being covered at SABCS 2017 in the areas of hormone therapy, immunotherapy, neoadjuvant therapy, and more.
Dr Hope Rugo discusses studies that are aiming to evaluate the effect that CDK4/6 inhibitors have on patients with HER2+ breast cancer.
Dr Hope Rugo describes how she would treat a patient with HER+ metastatic breast cancer who has progressed on a CDK4/6 inhibitor plus aromatase inhibitor.
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