Phase IV Study of Abemaciclib Combined with Aromatase Inhibitors or Fulvestrant for Women 18 and Older with Hormone Receptor-Positive HER2-Negative Advanced or Metastatic Breast Cancer Focus on Managing Side Effects Using a Digital Health App

What this Trial Is About

Researchers are evaluating the safety, effectiveness, and quality of life for combining Abemaciclib with either an Aromatase Inhibitor or Fulvestrant in women with metastatic hormone receptor-positive, HER2-negative breast cancer. This Phase IV trial focuses on both pre- and postmenopausal patients receiving first-line treatment. A digital health app called CANKADO will be used to track side effects and patient-reported outcomes daily, alongside standard documentation. The study also aims to explore biomarkers to better understand treatment responses and resistance. Participants will receive either Abemaciclib combined with an Aromatase Inhibitor Anastrozole, Letrozole, or Exemestane taken orally twice daily plus daily Aromatase Inhibitor tablets every 24 hours in 28-day cycles, or Abemaciclib with Fulvestrant which is given as an injection on specific days within 28-day cycles. The two treatment groups are experimental and non-randomized, with no masking. The trial includes monitoring for side effects and quality of life throughout treatment. During the study, participants will regularly report side effects and global health status using questionnaires at multiple time points up to 24 months, including specialized breast cancer quality of life modules. Researchers will assess progression-free survival up to 48 months, as well as adverse events, hospitalizations, clinical benefit rate, overall survival, and tumor response. The use of the CANKADO app for side effect reporting is strongly recommended but not mandatory. Participants will be followed for safety and outcomes throughout the trial duration.

Combination of Abemaciclib and Endocrine Therapy in Hormone Receptor Positive HER2 Negative Locally Advanced or Metastatic Breast Cancer With Focus on Digital Side Effect Management