ObjectiveTo investigate the protective effects of glycine on rat sinusoidal endothelial cells (SECs) after hepatic warm ischemiareperfusion and its mechanism.MethodsSeventytwo male SD rats were randomly divided into the normal control,ischemiareperfusion,glycine plus strychnine treated and glycine treated groups. The changes of endothelin (ET),hyaluronic acid (HA),tumor necrosis factorα (TNFα) content and alanine aminotransterase (ALT), superoxide dismutase (SOD) activity as well as morphology of SECs under light microscope were observed at the time point 1,3,24 h after hepatic reperfusion. The effects of glycine on the above parameters were also observed. ResultsThe group using glycine treated, the abnormal changes of all above parameters were improved remarkably (P＜0.01 or P＜0.05). Strychnine can antagonize these effects partly.ConclusionGlycine can prevent the injury to rat SECs after hepatic warm ischemiareperfusion.It most likely acts through glycine receptor on SECs and Kupffer cells.