Ph3 Study of Exemestane With or Without Entinostat in Chinese Patients With Hormone Receptor-Positive, Locally Advanced or Metastatic Breast Cancer

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This randomized phase III trial studies entinostat combination with exemestane to see how well they work compared to exemestane alone in treating Chinese patients with hormone receptor-positive, locally advanced or metastatic breast cancers. Estrogen can drive the growth of breast cancer cells. Exem...

This randomized phase III trial studies entinostat combination with exemestane to see how well they work compared to exemestane alone in treating Chinese patients with hormone receptor-positive, locally advanced or metastatic breast cancers. Estrogen can drive the growth of breast cancer cells. Exemestane may fight breast cancer by lowering the amount of estrogen the body makes from tissue aromatase. Entinostat may enhance the anti-tumor effect of exemestane in breast cancer by helping to overcome tumor resistance via epigenetic modifications. Previous Phase II trial in US breast cancer patients have demonstrated significant effects of combined therapy in slowing disease progression and on patient survival when compared to exemestane alone. It is not yet known whether exemestane is more effective when combined with entinostat in Chinese patients with advanced breast cancer. In this parallel, randomized, double blind, active controlled study, we will study the effect of entinostat/placebo in combination with exemestane in Chinese patients with hormone receptor-positive, HER2 receptor-negative, locally advance or metastatic breast cancer, who have experienced disease progression with prior endocrine therapies.

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