['Recent studies show that the Agkistrodon acutus (Viperidae) (syn. Deinagkistrodon acutus) protein C activator (PCA) treats acute myocardial infarction and ischaemia-reperfusion animal models effectively, while the underlying mechanism remains unknown.', 'To study the effect of PCA on the injury of human umbilical vein endothelial cells (HUVECs) induced by H', 'Primary cultured HUVECs were pretreated with PCA (20, 40 and 80\u2009μg/mL) for 1\u2009h, then HUVEC apoptosis was induced by 300\u2009μmol/mL H', 'Morphological changes were induced by H'] Does agkistrodon acutus-purified protein C activator protect human umbilical vein endothelial cells against?