||Verzenio (abemaciclib) is a dual CDK4/6 inhibitor, which inhibits Rb1 protein phosphorylation and may induce cell cycle arrest and prevent growth in cancer cells (PMID: 24919854). Verzenio (abemaciclib) is FDA approved as a monotherapy and in combination with Faslodex (fulvestrant) in patients with hormone receptor-positive (ESR, PGR) and ERBB2 (HER2) receptor-negative advanced or metastatic breast cancer (FDA.gov).
||Femara (letrozole) is an aromatase inhibitor, which inhibits estrogen synthesis (NCI Drug Dictionary). Femara (letrozole) is approved for postmenopausal women with hormone receptor positive breast cancer (FDA.gov).
||Xentuzumab (BI 836845) is a monoclonal antibody that binds to IGF-1 and IGF-2 and prevents binding to the IGF receptor (IGF-1R), resulting in decreased IGF-1R signaling (NCI Drug Dictionary).