背景:血管新生可能与神经干细胞的增殖有相关性,但仍无统一观点.目的:观察血管新生对局灶性缺血再灌注后大鼠脑室下区神经干细胞增殖的影响.方法:成年雄性SD大鼠,随机分为正常组、假手术组、手术组、侧脑室注射血管内皮生长因子+手术组、侧脑室注射生理盐水+手术组,各组再分为缺血再灌注1,3,7,14d组,每组12只.线栓法制作局部脑缺血再灌注模型,给予相应干预措施,利用免疫组化法检测各组大鼠脑室下区Nestin的表达,Real time-PCR法检测各组大鼠脑室下区 vWF mRNA的表达.结果与结论:①缺血再灌注后脑室下区vWF mRNA、Nestin阳性表达增加;在缺血后7d,vWF mRNA、Nestin阳性表达均达高峰,提示局灶性缺血再灌注后大鼠脑室下区神经干细胞的增殖与血管新生存在时间相关性;②侧脑室注射血管内皮生长因子+手术组vWF mRNA、Nestin阳性表达较手术组及侧脑室注射生理盐水+手术组明显增高,提示缺血再灌注后血管新生可促进大鼠脑室下区神经干细胞的增殖.%BACKGROUND:The angiogenesis may be related to the proliferation of neural stem ceils,but there is still no unified view.OBJECTIVE:To observe the influence of angiogenesis on neural stem cell proliferation in the subventricular zone of rats after focal cerebral ischemia/reperfusion.METHODS:Male Sprague-Dawley rats were randomly divided into normal group,sham group,vascular endothelial growth factor (VEGF)+cerebral ischemia/reperfusion group,normal saline (NS)+cerebral ischemia/reperfusion group.The injection was done via the lateral cerebral ventricle.Then,each group was subdivided into four groups (1,2,7,14 days after ischemia/reperfusion).Focal cerebral ischemia/reperfusion models were made by the thread method.After modeling,the corresponding intervention was given in each group.The expression changes of Nestin and vWF mRNA in the subventricular zone were detected in all groups by immunohistochemical staining and real-time PCR,respectively.RESULTS AND CONCLUSION:There was a certain increase in vWF and Nestin positive expression in the subventricular zone after cerebral ischemia/reperfusion.At 7 days after ischemia,the expression of vWF mRNA and Nestin reached the peak,indicating the proliferation of neural stem cells in the subventricular zone after cerebral ischemia/reperfusion is associated with the time of angiogenesis.In addition,the expression of vWF mRNA and Nestin was significantly higher in the VEGF+cerebral ischemia/reperfusion group than the other two groups,indicating angiogenesis could promote the proliferation of neural stem ceils in the subventricular zone of rats after cerebral ischemia/reperfusion.
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