A, PC-3 cells were inoculated s.c. and when tumors reached 100mm3, mice were treated with scrambled (ScrB) control+PBS, ScrB+chloroquine (CQ), OGX-427+PBS or OGX-427+CQ as described in Materials and Methods. Each data point represents the mean tumor volume in each group containing 8 mice ± SEM. *, differ from ScrB+PBS, ScrB+CQ or OGX-427+PBS treatment group (P<0.05). B, tumors were collected after 49 days. Hsp27, Ki-67 and TUNEL were evaluated by immunohistochemical analysis (original magnification: x200).