HPT at 0.005 mg/L inhibited T 24 bladder cancer cells by preventing the cells from S phase to G2/M phase and did not induce apoptosis.

• 0.；005mg/L的羟基喜树碱，主要是通过阻止T24细胞由S期进入G2/M期，并不诱导人T24膀胱癌细胞的凋亡；