骨髓间充质干细胞移植对缺血性脑卒中大鼠炎症因子的影响

目的通过骨髓间充质干细胞(BMSC)移植治疗,观察缺血性脑卒中大鼠神经功能恢复情况,检测大鼠神经元凋亡、小胶质细胞激活及炎症因子释放来探讨BMSC神经修复的可能机制。方法24只SD雄性大鼠随机分为空白对照组、模型组和BMSC组。模型组和BMSC组采用改良线栓法制备大鼠大脑中动脉阻塞(MCAO)的缺血再灌注模型,BMSC组造模成功后予以BMSC尾静脉注射。于注射后第28天观察大鼠神经行为学评分,通过实时荧光定量PCR及ELISA检测大鼠血清及脑组织中炎症因子表达水平,用激光共聚焦显微镜观察小胶质细胞的激活,Western blot检测各组脑组织相关蛋白。结果与空白对照组比较,MCAO大鼠神经行为学评分明显升高(P＜0.01),血清及脑组织中白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)、白细胞介素-4(IL-4)、白细胞介素-10(IL-10)及转化生长因子-β1(TGF-β1)的表达明显升高(P＜0.001),小胶质细胞激活明显,神经元凋亡增加(P＜0.001)。与模型组比较,BMSC组大鼠神经行为学评分降低(P＜0.05),血清及脑组织中促炎因子IL-1β、TNF-α和IL-6的表达明显降低(P＜0.01),抑炎因子IL-4、IL-10和TGF-β1的表达明显升高(P＜0.01),小胶质细胞激活下降,神经元凋亡减轻(P＜0.01)。结论骨髓间充质干细胞移植对缺血性脑损伤有部分修复作用,其机制可能与抑制小胶质细胞的激活,抑制过度炎症反应,减轻神经元凋亡有关。

Effect of BMSC transplantation on inflammatory factors in inchemic stroke rats

The Party Central Committee with Xi Jinping as the core held high the great banner of the new era, led the whole party and the people of all ethnic groups in the country, carried out theoretical innovation and summarized practical experience, and finally formed Xi Jinping''s thought of socialism with Chinese characteristics in the new era. This scientific system has a strict internal logical relationship and structure. It mainly includes:the essential motivation and fundamental starting point are the original intention and mission of the Communists; the realistic basis and basic foothold are the transformation of basic national conditions and major social contradictions; the theme is to uphold and develop socialism with Chinese characteristics; the logical center is the people-centered. The ideological system of the new era development strategy includes strategic goals and tasks, strategic steps and layout, and strategic guarantee systems etc.