大鼠脑缺血再灌注损伤后Cx43蛋白的表达模式

  • 格式:docx
  • 大小:38.21 KB
  • 文档页数:3

大鼠脑缺血再灌注损伤后Cx43蛋白的表达模式

程骁;翁銮坤;罗浩轩;周丽华;王立新;孙景波;黄燕;蔡业峰

【期刊名称】《中国微侵袭神经外科杂志》

【年(卷),期】2014(19)7

【摘 要】Objective To establish the model of middle cerebral artery

occlusion (MCAO) and ischemia reperfusion for exploring the expression

patterns of connexin 43 (Cx43) protein after reperfusion. Methods

Seventy-five rats were randomly divided into MCAO group (n=60) and

sham operation group (n=15). The rats in MCAO group underwent MCAO

operation, and were divided into 0.5, 4, 12 and 24 h subgroups according

to the ischemia reperfusion time after the operation, with 15 rats in every

group, while those in the sham operation group were not inserted of the

suture thread. All the groups were investigated by modified neurological

severity score (mNSS), TTC staining and neuron Nissl staining. The

expression of Cx43 in the brain was detected by Western blot and

immunohistochemistry, and statistical analysis was performed. Results The

success rate of modeling was 75%in MCAO group. Compared with sham

operation group, the mNSS scores increased significantly (P<0.05),

cerebral infraction area increased and the neurons were damaged in

frontal and parietal cortex area in MCAO group. The Cx43 expressions

were respectively 0.23±0.12, 0.58±0.18, 0.78±0.07, 0.61±0.05 and

0.27±0.07 in MCAO 0.5, 4, 12 and 24 h groups and sham operation group by Western blot. Significant differences were found between MCAO 0.5, 4,

12 h groups and sham operation group (P<0.05), while no significant

difference was found between MCAO 24 h group and sham operation

group (P>0.05). The expression of Cx43 in subventricular zone started to

increase at 0.5 h, reached the peak level at 4 h, decreased gradually at 12 h

and returned to baseline level at 24 h by immunohistochemistry, which

was similar to the results from Western blot. Conclusion Cx43 protein plays

a pivotal role in the development and progression of cerebral ischemia

reperfusion injury.%目的:建立大鼠大脑中动脉闭塞(MCAO)缺血再灌注模型,探索再灌注后Cx43蛋白的表达模式。方法75只大鼠随机分为MCAO组(60只)和假手术组(15只)。MCAO组均行MCAO手术,术后根据缺血再灌注时间分为0.5、4、12、24 h 4个亚组,每组15只;假手术组不插入线栓。各组进行改良神经损伤严重程度评分(mNSS)、脑组织TTC染色及神经元尼式染色,Western blot及免疫组织化学方法检测各组脑组织Cx43蛋白的表达并进行统计学分析。结果 MCAO组造模成功率75%。MCAO组大鼠mNSS评分明显高于假手术组(P<0.05),脑梗死面积增加,额顶叶皮质区神经元大量损伤。Western blot结果显示:假手术组及MCAO 0.5、4、12、24 h组Cx43表达量分别为0.23±0.12、0.58±0.18、0.78±0.07、0.61±0.05和0.27±0.07, MCAO 0.5、4、12 h组与假手术组差异均有统计学意义(P<0.05),而MCAO 24 h组与假手术组差异无统计学意义(P>0.05)。免疫组化结果显示:MCAO组侧脑室下区Cx43的表达在0.5 h开始升高,4 h达高峰,12 h逐渐下降,直至24 h恢复基线水平;与Western blot结果一致。结论 Cx43蛋白在脑缺血性再灌注损伤发生、发展中起重要作用。

【总页数】4页(P323-326) 【作 者】程骁;翁銮坤;罗浩轩;周丽华;王立新;孙景波;黄燕;蔡业峰

【作者单位】510120 广州,广东省中医院脑病一科;510120 广州,广东省中医院脑病一科;510080 广州,中山大学中山医学院解剖学教研室;510080 广州,中山大学中山医学院解剖学教研室;510120 广州,广东省中医院脑病一科;510120 广州,广东省中医院脑病一科;510120 广州,广东省中医院脑病一科;510120 广州,广东省中医院脑病一科

【正文语种】中 文

【中图分类】R-332

【相关文献】

1.全脑缺血再灌注损伤后JUN蛋白在大鼠海马的表达及热休克预处理对其表达的影响 [J], 吕建瑞;马宏钟;薛荣亮

2.亚低温对大鼠脑缺血再灌注损伤后热休克蛋白70及胶质纤维酸性蛋白表达的影响 [J], 张秀洲;李文华;刘雪平

3.龙蛭汤对大鼠脑缺血再灌注损伤后Bcl-2和Caspase-3蛋白表达的影响 [J], 邹玲;陈永斌;刘启华;李南方;黄显雯

4.CoQ10预处理对高血糖大鼠脑缺血再灌注损伤后细胞凋亡及相关蛋白表达的影响 [J], 贺岭风;马贤;常越;马艳梅;郭永真;王娟;刘红梅;张玉玲

5.龙蛭汤对大鼠脑缺血再灌注损伤后Caspase-1和IL-18蛋白表达的影响 [J], 范俊逸;陈永斌;刘启华;罗燕萍;李南方;黄显雯

因版权原因,仅展示原文概要,查看原文内容请购买