A-C. Dose-response curves of organoid lines to enzalutamide, everolimus, and BKM120. Growth was measured in quadruplet and viability was assayed 4 days after treatment at the indicated drug concentrations (Mean +/- SD). D-E. Growth of MSK-PCA1 and MSK-PCA2 xenografts. Treatment was started with tumors reach an average size of 400 mm3. Each tumor was normalized to the pre-treatment size. (N=10, Mean +/-SEM). P value derived from unpaired two-tailed T-test of normalized tumor size at the end of treatment. Ev: everolimus, Enz: enzalutamide, Cast: castration.