七氟醚对肝缺血再灌注损伤时血管内皮蛋白多糖复合物的保护作用
发布时间:2018-04-01 13:25
本文选题:肝脏 切入点:缺血再灌注损伤 出处:《吉林大学》2014年博士论文
【摘要】:目的: 研究肝脏组织缺血再灌注损伤之后肝细胞及肝组织内血管内皮表面蛋白多糖复合物的损伤程度及机制,以及七氟醚预处理对二者的影响。 材料与方法: 本研究采用35只雌性大鼠随机分为5组,分别为A组氯胺酮对照组(Ket对照组),B组氯胺酮实验组(Ket实验组),C组七氟醚对照组(Sev对照组),D组七氟醚实验组(Sev实验组),E组七氟醚加氢化可的松组(Sev+氢可组)。按不同组别分别使用氯胺酮和七氟醚麻醉后,对照组不给予缺血处理,实验组及七氟醚加氢化可的松组将肝脏给予45分钟暖缺血处理,分别从各组大鼠股静脉抽取1ml静脉血标本之后,将各组肝脏离体,再将事先配制好的灌注液以30ml/h的速度进行灌注。灌注期内分别于0~2.5分钟,5~7.5分钟,,15~17.5分钟,35~37.5分钟,收集流出液标本,分别将所收集标本放置于-20℃冰箱中保存。采用酶联免疫吸附测定(ELESA)法检测标本中的硫酸乙酰肝素、蛋白聚糖-1、透明质酸的浓度;使用全自动化学分析仪检测样本中AST、ALT的含量;分别使用光学显微镜及电子显微镜观察不同组别肝组织血管内皮表面蛋白多糖复合物的脱落情况。 结果: 1.缺血再灌注损伤可以使肝细胞的破坏明显增加,流出液中AST、ALT含量明显增加;七氟醚及七氟醚加氢化可的松能减轻肝脏缺血再灌注损伤引起的肝细胞破坏,减少流出液中AST、ALT的含量,且这种保护作用以七氟醚加氢化可的松更加明显。 2.缺血再灌注损伤可以导致肝血管内皮蛋白多糖复合物的脱落,使流出液中硫酸乙酰肝素、蛋白聚糖-1、透明质酸的含量明显增加,血管内皮结构变薄;七氟醚及七氟醚加氢化可的松能能减轻肝脏缺血再灌注损伤引起的肝血管内皮蛋白多糖复合物的脱落,减少流出液中硫酸乙酰肝素、蛋白聚糖-1、透明质酸的含量,且这种保护作用以七氟醚加氢化可的松更加明显。 结论: 1.七氟醚及七氟醚加氢化可的松的预处理可以明显减少肝缺血再灌注损伤之后肝细胞的破坏。 2.七氟醚及七氟醚加氢化可的松的预处理可以明显减少肝缺血再灌注损伤之后肝血管内皮细胞表面蛋白多糖复合物的脱落。
[Abstract]:Objective:. To study the damage degree and mechanism of vascular endothelial proteoglycan complex in liver cells and liver tissues after ischemia reperfusion injury and the effect of sevoflurane pretreatment on them. Materials and methods:. In this study, 35 female rats were randomly divided into 5 groups. Group A, ketamine control group, Ket control group, Ket control group, ketamine experimental group, Ket experimental group, Ket experimental group, sevoflurane control group, sev control group, sevoflurane control group, sevoflurane experimental group, sevoflurane group, sevoflurane group, seflurane group, sevoflurane group and hydrocortisone group. After anesthesia with ketamine and sevoflurane respectively, The experimental group and the sevoflurane plus hydrocortisone group were treated with warm ischemia for 45 minutes. The 1ml venous blood samples were extracted from the femoral vein of the rats in each group, and the liver of each group was isolated. The pre-prepared perfusion solution was perfused at the rate of 30ml/h. During the perfusion period, the effluent samples were collected at 0 ~ 2.5 min, 57.5 min, 157.5 min, 17.5 min, 35 min, 37.5 min, respectively. The collected samples were stored in a refrigerator at -20 鈩
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