ABSTRACT
Objective:To observe protective effect of Danggui Buxuetang (DBT) on oxidative stress injury of mouse bone marrow-derived endothelial progenitor cells (EPCs) against induced by hydrogen peroxide (H2O2). Method:Monocytes from bone marrow of mice were obtained by density gradient centrifugation, and EPCs were obtained by specific culture medium. The experiment was divided into blank group，model group，DBT group (100，200，400 mg·L-1). Methyl thiazolyl tetrazolium（MTT） assay was used to determine the survival rate of EPCs and establish the cell injury model induced by H2O2. MTT，transwell chamber，matrigel and superoxide fluorescent anion probe (DHE) were used to detect the proliferation，migration，in vitro angiogenesis and ROS level，detection of autophagy by Western blot. Result:Compared with blank group，the proliferation ability，migration ability，the number of lumens and the length of tubule branches of EPCs in the model group were significantly reduced (P<0.01)，the level of intracellular reactive oxygen species （ROS） was significantly increased (P<0.01)，the expression of p62，the light chain microtubule associated protein 1 protein light chain 3 Ⅱ type （LC3-Ⅱ） protein of microtubule associated protein 1，was significantly increased (P<0.01). Compared with model group，DBT group increased the ability of cell proliferation and migration （P<0.01）. In addition，DBT increased the expression of LC3-Ⅱ protein in a concentration dependent manner (P<0.01)，and decreased the expression of p62 protein (P<0.01). Conclusion:DBT can improve the autophagy level of EPCs under oxidative stress, promote the proliferation, migration and angiogenesis of injured EPCs, and protect the biological function of EPCs under oxidative stress.