丙酮酸乙酯对脓毒症大鼠小肠黏膜屏障的保护作用及其机制

被引:6
作者
张庆伟 [1 ]
王春亭 [2 ]
王启志 [2 ]
张琳 [2 ]
王鹏 [2 ]
孟玫 [2 ]
机构
[1] 山东医学高等专科学校
[2] 山东大学附属省立医院重症医学科
关键词
脓毒症; 丙酮酸乙酯; 小肠黏膜屏障; Wistar,大鼠;
D O I
暂无
中图分类号
R459.7 [急症、急救处理];
学科分类号
100231 [临床病理学];
摘要
目的探讨丙酮酸乙酯(EP)对脓毒症大鼠小肠黏膜屏障功能的影响及其机制。方法采用盲肠结扎穿孔术(CLP)将85只Wistar大鼠制备脓毒症模型,并随机分成脓毒症林格氏液组(Rin组)、脓毒症EP治疗组(EP组)、假手术对照组。观察各组大鼠小肠黏膜组织变化和细菌移位情况,检测小肠黏膜微循环血流量和髓过氧化物酶的活性变化,以及诱生型一氧化氮合酶(iNOS)mRNA表达水平和肠腔内的肥大细胞蛋白酶(RMCPⅡ)量的变化,统计各组大鼠的96 h生存率。结果 Rin组小肠黏膜损伤较重,EP组小肠黏膜较Rin组有改善,细菌移位集落数减少;假手术对照组未发现细菌移位;与假手术对照组比较,Rin组小肠黏膜的血流减少(P<0.001),MPO表达增高(P<0.001),RMCPⅡ浓度增高显著(P<0.001),iNOS/β-actin比值升高(P<0.001);与Rin组比较,EP组腹腔注射EP后能改善小肠黏膜微循环血流量(P<0.001),抑制MPO(P<0.05)和iNOS高表达(P<0.05),对RM CPⅡ影响不大(P>0.05),可提高脓毒症大鼠的96 h生存率(P<0.01)。结论 EP可能是通过减少肠道组织M PO、iNOS表达,降低脓毒症大鼠肠道黏膜细菌移位,显著改善微循环血流,对脓毒症大鼠的小肠黏膜屏障有一定的保护作用。
引用
收藏
页码:30 / 34
页数:5
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