The Clinical Efficacy of Enzalutamide in Metastatic Prostate Cancer: Prospective Single-center Study

Background/Aim: To evaluate the effectiveness of enzalutamide in Italian patients with hormone-refractory metastatic castration-resistant prostate cancer, progressing after chemotherapy with docetaxel plus prednisone. Patients and Methods: A total of 60 patients were enrolled. Reduction in serum prostate-specific antigen (PSA) was assessed as the primary endpoint, while reduction in pain, safety, progression-free survival and overall survival represented secondary endpoints. Results: Enzalutamide was well tolerated, with a manageable toxicity profile and a modest objective response rate. A considerable difference in serum levels of PSA before and after treatment was observed. A significant correlation between PSA response and overall survival was also noted. The regression analysis revealed PSA level to be predictive of overall survival. Conclusion: Enzalutamide was shown to be an effective and welltolerated therapeutic option in patients with metastatic castration-resistant prostate cancer progressing after docetaxel plus prednisone treatment.