慢性束缚应激对大鼠肠粘膜屏障功能的影响

被引:7
作者
石慧琳
程义勇
李树田
王冬兰
于志杰
耿战辉
陈伟强
冯凭
机构
[1] 天津医科大学附属总医院内分泌科
[2] 军事医学科学院卫生学环境医学研究所
关键词
应激; 慢性束缚应激; 肠粘膜; 屏障功能;
D O I
暂无
中图分类号
R363 [病理生理学];
学科分类号
摘要
目的 探讨慢性束缚应激对大鼠肠粘膜屏障功能的影响及其可能存在的损伤和防御机制。方法 将 40只Wistar大鼠按体重随机分为对照组、一周应激组、二周应激组、三周应激组 ,测定各组大鼠的旷场行为 ,血浆D 木糖水平以及小肠肠壁肥大细胞计数 ,血浆皮质醇、乙酰胆碱酯酶 (acetylcholinesterase)、促肾上腺皮质激素释放激素 (CRH )水平 ,血浆和肠粘膜神经降压素 (neurotensin ,NT)含量。结果 旷场实验中 ,应激组大鼠较对照组表现出活动减少的特征 ;血浆D 木糖、皮质醇水平较对照组明显升高 ;肥大细胞计数 ,血浆乙酰胆碱酯酶水平明显降低 ;CRH、NT表现出一个早期升高 ,晚期降低的过程。结论 慢性束缚应激能够导致肠粘膜屏障功能的持续损害 ,其机制可能涉及肥大细胞、胆碱能神经的激活 ,CRH的中枢及外周作用 ;NT可能作为一种保护因子起到防御作用。
引用
收藏
页码:11 / 13
页数:3
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