TRADE: Dose Escalation Tolerability of Abemaciclib in HR+ HER2- Early Stage Breast Cancer

연구 개요

In this research study, investigators are testing if a dose-increasing strategy for abemaciclib will have less side effects and be better tolerated than the standard dosage of abemaciclib for participants with early-stage high-risk hormone receptor positive breast cancer. The names of the study drugs involved in this study are: * Abemaciclib (CDK4 and CDK6 inhibitor) * Tamoxifen (Selective estrogen receptor modulator) * Anastrozole/Letrozole (Non-steroidal aromatase inhibitors) * Exemestane (steroidal aromatase inhibitor) * LHRH (Gonadotropin-releasing hormone agonist, or Luteinizing hormone-releasing hormone agonist)