Objective To determine the inhibitory effect of APE1 siRNA expression vector pSilence APE1, and the possible synergetic role of pSilence APE1 and endostatin on endothelial cell migration induced by osteosarcoma cell 9901 and HOS . Methods The osteosarcoma cells and endothelial cells were co-cultured with transwell model, and the cell number through the inner membrane was counted to evaluate the inhibitory effect of endothelial cell migration by pSilence APE1 and its combination with endostatin. Results Both low dose (350 ng/ml) and high dose (700 ng/ml) of endostatin showed significant inhibition to endothelial cell migration induced by osteosarcoma cell, while the high dose showed much stronger inhibition than the low dose (P

Objective To study the effect of caffeic acid phenethyl ester (CAPE) on the expression of ?-catenin in the cultured colorectal cancer cell lines. Methods HCT116 and W480 cells were treated with CAPE at serial concentrations of 2.5, 5, and 10 mg/L. ?-catenin protein expression was assayed by Western blot analysis. ?-catenin localization was detected by indirect immunofluorescence. Results CAPE treatment was associated with decreased total ?-catenin protein expression. The expression of ?-catenin at the cell nucleus and cytoplasm was downregulated, but at the cell-cell linked site the ?-catenin protein expression was upregulated. Conclusion CAPE can downregulate the expression of ?-catenin and inhibit the translocation of ?-catenin to nucleus, which may play an important role in the anticancer activity of CAPE.