血清透明质酸在大鼠肝脏低温保存-灌注损伤中的作用

目的 :探讨血清透明质酸 (hyaluronic acid,HA )浓度与肝脏低温保存 -灌注损伤的关系。方法 :在成功建立大鼠原位肝移植模型的基础上 ,将实验动物分为 3组 :(1)对照 (A)组 ;(2 )低温保存 2 h后移植 (B)组 ;(3)低温保存 4h后移植 (C)组。分别在术后 2、4h取血清和肝脏标本检测 HA及部分肝功能指标 ,并进行病理观察。 结果 :移植后血清 HA水平比传统的肝功能指标如乳酸脱氢酶 (L DH)、天冬氨酸转氨酶 (AST)升高早 ,下降快。在 B组和 C组 ,血清 HA水平明显升高 ,与 A组相比差异显著 (P<0 .0 1)。B组和 C组可见血管内皮细胞损伤、肝窦和肝小叶结构紊乱。C组移植后 4h标本炎细胞浸润明显。结论 :肝脏低温保存导致明显的内皮细胞损伤 ,再灌注后损伤加重。血清 HA水平可反映冷缺血 -再灌注损伤的程度

Effect of serum hyaluronic acid on the liver cryopreservation-reperfusion injury in rats

Objective: To investigate the relation between ser um hyaluronic acid (HA) concentration and cryopreservation-reperfusion injury. Methods: The animals were randomly assigned to 3 groups: (1 ) group A: the control; (2) group B: liver allografts were stored in lactated R inger's solution (0℃) for 2 h before implantation; (3) group C:liver allografts were stored in lactated Ringer's solution (0℃) for 4 h before implantation. Th e serum sample and liver specimen were taken up at 2 h and 4 h after transplanta tion to detect the concentration of HA, AST and LDH, and to get pathologic obser vation. Results: Serum HA increased earlier and decreased more s hortly than AST and LDH after transplantation in group A. Serum HA increased sig nificantly in group B and C, much higher than that in group A(P<0.01). The i njury of vascular endothelium and the disorder of hepatic sinuses and hepatic lo b ules were observed in group B and C. In the specimen of 4 h in group C, evident infiltration of inflammatory cell was present. Conclusion: Cryopreservation leads to injury of endothelial cell and reperfusion aggravat es this injury. The serum HA concentration indicates the degree of cold ischemia -reperfusion injury.