摘要
目的 探讨VEGF治疗脑梗死的机制。方法 用线拴法制成Wistar大鼠大脑中动脉永久性闭塞模型 ,将VEGF165真核表达质粒 pUCCAGGS/hVEGF165经颅骨注入到缺血区。术后 7d断头取脑 ,用逆转录PCR(RT -PCR)检测VEGFmRNA的表达强度 ,用免疫组织化学方法检测Fas、Fasl和VEGF的表达水平。结果 与对照组相比 ,治疗组VEGFmRNA的表达增强 ,VEGF表达增高 (P<0 0 1) ,Fas、Fasl表达减弱 (P <0 0 1)。结论 VEGF165基因可以转化到缺血脑组织中并表达VEGFmRNA和VEGF ,后者可能通过抑制Fas和Fasl的表达而保护神经细胞。
Objective To explore the mechanism of VEGF treating cerebral ischemia. Methods A rat model of middle cerebral artery occlusion (MCAO) was set up by nylon suture embolization. The naked plasmid DNA encoding vascular endothelial growth factor(pUCCAGGS/hVEGF 165 ) was directly injected through skull into the ischemic areas of brain. After seven days the rats were killed. RT-PCR was used to measure the expression of VEGF mRNA in the brain tissues, and immunohistochemistry was appllied to detect the expression of VEGF, Fas and Fas L in the brain tissues. Results Compared with control group, VEGF expression significantly increased in the therapeutic group(P<0.01), while Fas and FasL expression obviously decreased in the therapeutic group(P<0.01). Conclusion The results indicated that VEGF gene could be introduced into the ischemic brain tissues and express VEGF mRNA and protein. The VEGF protein could protect neuro-cells possibly by inhibting the expression of Fas and FasL.
出处
《中国医师杂志》
CAS
2004年第10期1335-1337,共3页
Journal of Chinese Physician
