Alisertib, Abiraterone Acetate and Prednisone in Treating Patients With Hormone-Resistant Prostate Cancer

This phase I/II trial studies the side effects and best dose of alisertib when given together with abiraterone acetate and prednisone and to see how well it works in treating patients with hormone-resistant prostate cancer. Alisertib and abiraterone acetate may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Androgens can cause the growth of prostate cancer cells. Drugs, such as abiraterone acetate, may also lessen the amount of androgens made by the body. Drugs used in chemotherapy, such as prednisone, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Giving alisertib, abiraterone acetate, and prednisone together may be an effective treatment for prostate cancer.