Metastatic Breast Cancer Clinical Trial
Official title:
Evaluation of the Effects of Endocrine Therapy and Abemaciclib on Host and Tumor Immune Cell Repertoire/Function in Advanced ER+/HER2- Breast Cancer
The purpose of this study is to perform an in depth analysis of changes in the tumor immune microenvironment in patients undergoing treatment with standard of care endocrine therapy and abemaciclib in the advanced setting via singe cell RNA sequencing. The investigators will also correlate changes in serum estrogen levels to changes in tumor and peripheral immune cell repertoire and function (including regulatory T cell populations, B cells, myeloid-derived suppressor cell populations, T cell activation and T cell exhaustion).This study has two cohorts with 15 patients in each cohort.
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