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Brief Title: Study of CYH33 in Combination With Endocrine Therapy With or Without Palbociclib in Patients With HR+, HER2- Advanced Breast Cancer
Official Title: A Multicenter, Open-label, Phase Ib Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Preliminary Efficacy of CYH33 in Combination With Endocrine Therapy With or Without Palbociclib in Patients With PIK3CA Mutant, HR+, HER2- Advanced Breast Cancer
Study ID: NCT04856371
Brief Summary: This is a multicenter, open-label, phase Ib study designed to evaluate the safety, tolerability, pharmacokinetics and preliminary efficacy of CYH33 administered orally in combination with standard-of-care ET ± CDK4/6 inhibitor therapies for the treatment of locally advanced, recurrent or metastatic hormone-receptor positive (HR+), human epidermal growth factor receptor 2 negative (HER2-) breast cancer. Patients will be enrolled in two stages, including dose exploration phase (Stage 1) and dose expansion phase (Stage 2) of each cohort.
Detailed Description:
Minimum Age: 18 Years
Eligible Ages: ADULT, OLDER_ADULT
Sex: ALL
Healthy Volunteers: No