Role of caspase-3 in apoptosis of human umbilical vein endothelial cell induced by heat stress / 实用医学杂志

ABSTRACT

Objective To explore the effect of activation of caspase-3 on apoptosis of human umbilical vein endothelial cells induced by heat stress. Methods A model of human umbilical vein endothelial cell heat stress was established. The endothelial cells in the control group were incubated at 37 ℃, while the cells in the heat stress group were incubated at 39 ℃, 41 ℃, or 43 ℃ for 2 h , then all the cells were further incubated at 37 ℃ for 24 h. Apoptosis was detected using staining with Hoechst33258; protein levels of caspase-3 were analyzed by Western blot; and the effect of caspase-3 inhibitor Z-DEVD-FMK on heat stress-induced apoptosis was determined. Results As compared with the control group, with an elevation in heat stress temperature (41℃ to 43 ℃), apoptosis was markedly increased and level of caspase-3 was significantly increased. In addition , caspase-3 inhibitor Z-DEVD-FMK significantly decreased the heat stress-induced apoptosis and levels of caspase-3. Conclusions Caspase-3 mediates apoptosis of human umbilical vein endothelial cells can be induced by heat stress.