HR+/HER2- Advanced Breast Cancer

A phase II study to explore the efficacy and safety of dalpiciclib plus HDACi in HR+/HER2- advanced breast cancer after the failure of CDK4/6 inhibitor therapy.

This is a prospective, single-arm, single-center, open, exploratory clinical study.. Screening for histopathologically confirmed recurrent or metastatic ER-Low positive (1%-10%) and HER2-negative breast cancer patients who meet the inclusion criteria and have not previously received any systemic anticancer therapy for advanced disease, He was treated with albumin-bound paclitaxel in combination with Dalpiciclib and AI.

To explore the efficacy and safety of chidamide combined with endocrine in phosphoinositide-3-kinase,catalytic,alpha gene(PI3KCA) wild type hormone receptor positive(HR+)/human epidermal growth factor receptor 2 negative (HER2-) advanced breast cancer patients and to explore the efficacy and safety of Everolimus combined with endocrine therapy in patients with PI3KCA Mutant HR+/HER2- advanced breast cancer.