BMI-1 inhibition reduces TIC number and interferes with self-renewal capacity in vitro. A, Fold adhesion of rapidly adherent CD49bhiCD29hiCD44hi cells evaluated upon treatment of total DU145 with inhibitors targeting BMI-1 for 72hrs. B, IC50s of compounds C-209-211 assessed in DU145 cells through an ELISA assay. C, Effects of BMI-1 post-transcriptional inhibitors vs. the non-specific protein translation inhibitor cycloheximide (CHX), or the chemotherapeutics methotrexate (MTX) and doxorubicin on secondary (left) and tertiary (right) prostate spheroids formation. Treatments that were statistically significant were indicated as *p <0.05 and **p<0.01, compared to untreated.