The protection effects of glycine pretreatment on brain dead donor liver / 中华器官移植杂志

ABSTRACT

Objective To evaluate the protection effects of glycine on the brain dead donor liver. Methods 42 male Wistar rats were randomized into 3 groups of liver transplantation brain dead donor (BDD) group (group B), glycine pretreatment group with BDD (group G), strychnine pretreatment group with BDD (group S). For groups B, G and S, the brain death model was established in the donor rats and then liver transplantation was performed utilizing microsurgical techniques. After establishment of brain death state, and during liver cold rinse of donors or liver reperfusion of the recipients, rats in group B were treated with glycine at a dose of 0.6 mmol, 25 ?mol and 25 ?mol in group G, and rats in group S were given the same dose of glycine and strychnine ( 1 000 ∶1), and rats in group B were not treated. Before the cold rinse, at 2 h and 6 h after the portal vein (PV) reperfusion, blood samples were taken from IHVC to determine the levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), tumor necrosis factor alpha (TNF ?) and hyaluronic acid (HA). At 6 h after PV reperfusion, graft samples were fixed for morphological observation and the apoptosis of hepatocytes was detected by using TUNEL method. Results At the time points before liver cold rinse or at 2 h and 6 h after PV reperfusion, serum levels of ALT, AST, TNF ?, HA and apoptosis index (AI) in groups B and S were significantly higher than those in group G ( P 0.05 ). Electron microscopy showed that Kupffer cells were activated and hepatic cells injured more obviously in groups B and S than in group G. Conclusion Glycine may alleviate the injury of the graft from the brain dead rats.