Objective To study whether ecdysterone (EDS) inhibits apoptosis of endothelial cells. Methods In the model of sodium arsenite (Ars)-induced endothelial cell apoptosis, the effect of EDS at varied dosages (50, 200, 800 mg/L) on cell apoptosis was observed by measuring the number of apoptotic endothelial cells, intracellular adhesion molecule-1 (ICAM-1) and the oxidative state (OS). Results Ars at the dosages of 40, 80, 160 mmol/L was capable of causing an increase in the number of apoptotic endothelial ce...