全脑缺血/再灌注大鼠皮层PGI和TXA时程变化特征

被引:15
作者
杨彬
余丽娟
王佳
赵磊
胡馨月
纪超男
魏玉玲
阳群芳
蒋青松
杨俊卿
机构
[1] 重庆医科大学药理学教研室,重庆市生物化学与分子药理学重点实验室
关键词
全脑缺血/再灌注; PGI2; TXA2; PGI2/TXA2; 皮层; 神经元;
D O I
暂无
中图分类号
R743 [脑血管疾病];
学科分类号
100204 [神经病学];
摘要
目的观察PGI2、TXA2含量及PGI2/TXA2比值在全脑缺血/再灌注大鼠皮层中的时程变化特征。方法采用夹闭双侧颈总动脉,右侧颈总静脉抽血再回输建立大鼠全脑缺血/再灌注模型。多普勒激光脑血流仪监测大鼠在缺血/再灌注手术过程中的脑血流变化。Morris水迷宫检测大鼠空间学习记忆能力。HE染色观察大鼠皮层神经元形态结构变化。ELISA测定大鼠皮层中PGI2、TXA2含量。结果大鼠在全脑缺血过程中脑血流降低74.45%。与假手术组比较,全脑缺血/再灌注组大鼠寻台潜伏期明显增加,皮层神经元出现明显核固缩,细胞层次紊乱,神经细胞数目明显减少,并随再灌注时间延长而损伤加重。PGI2、TXA2、PGI2/TXA2比值在再灌注2 h内明显低于假手术组,再灌注6 h时明显升高,PGI2、TXA2峰值在48 h,PGI2/TXA2比值峰值在7 d。结论全脑缺血/再灌注损伤诱导大鼠皮层PGI2和PGI2/TXA2比值明显增加,并具有时间依赖性特征。
引用
收藏
页码:1667 / 1671
页数:5
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