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论文摘要

肢体缺血后处理对脑缺血大鼠神经功能恢复和神经细胞增殖的作用

Effects of Limb Ischemic Postconditioning on Behavioral Improvement and Proliferation of Neural Cells in

作者:黄丹, 刘洪红, 杨桢等

Author:HUANG Dan, LIU Hong-hong, YANG Yang. et al

收稿日期:          年卷(期)页码:2017,48(3):378-383

期刊名称:四川大学学报(医学版)

Journal Name:JOURNAL OF SICHUAN UNIVERSITY (MEDICAL SCIENCE EDITION)

关键字:脑缺血 缺血后处理 神经保护 神经元 星形胶质细胞

Key words:Cerebral ishcemia Ischemic postconditioning Neuroprotection Neurons Astrocytes

基金项目:

中文摘要

目的探索非侵入式肢体缺血后处理(NLIP)对脑缺血大鼠的脑保护作用和损伤侧皮质区神经细胞的表达与分布。方法SD大鼠110只随机分成假手术组(n=10), 缺血再灌注损伤组(I/R组,n=50),NLIP组(治疗组,n=50)。I/R组和治疗组动物采用线栓法制备大脑中动脉栓塞(MCAO)模型(假手术组不插入线栓),治疗组于再灌注即刻给予NLIP处理(改良的缺血弹性带股动脉近端加压阻断股动脉10 min,再通10 min,循环3次),术后3 d、7 d、14 d、21 d、28 d分别称取大鼠体质量,并进行行为学评估后处死大鼠取脑组织,免疫组织化学染色检测各时点缺血脑皮质中的双皮质素(DCX)和胶质细胞原纤维酸性蛋白(GFAP)的表达,Western blot检测缺血脑皮质中微管相关蛋白2(MAP2)的表达。结果假手术组动物术后1 ~3 d表现出轻度的体质量下降和行为学缺损,术后1 d出现上肢肌力减弱,之后开始恢复。与假手术组比较,以上神经缺损在I/R组和治疗组动物中更加明显(PPPP>0.05),之后逐渐上调,术后14 d和21 d时高于假手术组(PPP

英文摘要

Objective To determine the effects of non-invasive limb ischemic postconditioning (NLIP) on the behavioral performance and the expression and distribution of neural cells in rats with ischemic cortex. Methods Rats were randomly divided into 3 groups: sham group (n=10), ischemia/reperfusion (I/R) group (n=50), and NLIP group (n=50). Focal cerebral ischemia was induced by intraluminal MCAO in the rats in the I/R and NLIP groups, while no suture was inserted in the sham-operated rats. NLIP(reperfusion-10 min,ischemia-10 min,×3 cycles) was conducted immediately after reperfusion on bilateral femoral arteries by modified ischemicelastic bands. Body mass and behavioral performance of the rats were assessed at 3 d, 7 d, 14 d, 21 d and 28 d post-ischemia (n=5-10). Doublecortin (DCX) and glial fibrillary acidic protein (GFAP) in the ischemic cortex were detected by immunohistochemistry.The expression of microtubule associated protein 2 (MAP2) was detected by Western blot. Results The rats in the sham group showed mild body mass loss and minor neurological deficit 1-3 d post-ischemia and weakened muscle strength 1 d post-ischemia, which were alleviated gradually overtime. Compared with the sham group, neurological deficits were more obvious in the rats in the I/R and NLIP groups, which were alleviated 3-21 d post-ischemia and reached a level close to that of the sham group at 28 d post-ischemia. No significant difference was found betweenthe I/R and NLIP groups in neurologic deficit scores.NLIP significantly alleviated body mass loss 2-7 d post-ischemia (PP

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