Electroacupuncture has been shown to improve cerebral blood flow in animal models of stroke. However, it is unclear whether electroacupuncture alters mi RNA expression in the cortex. In this study, we examined changes...Electroacupuncture has been shown to improve cerebral blood flow in animal models of stroke. However, it is unclear whether electroacupuncture alters mi RNA expression in the cortex. In this study, we examined changes in the cerebral cortical mi RNA profile, cerebral blood flow and neurological function induced by electroacupuncture in a rat model of stroke. Electroacupuncture was performed at Renzhong（GV26） and Neiguan（PC6）, with a frequency of 2 Hz, continuous wave, current intensity of 3.0 m A, and stimulation time of 1 minute. Electroacupuncture increased cerebral blood flow and alleviated neurological impairment in the rats. mi RNA microarray profiling revealed that the vascular endothelial growth factor signaling pathway, which links cell proliferation with stroke, was most significantly affected by electroacupuncture. Electroacupuncture induced changes in expression of rno-mi R-206-3p, rno-mi R-3473, rno-mi R-6216 and rno-mi R-494-3p, and these changes were confirmed by quantitative real-time polymerase chain reaction. Our findings suggest that changes in cell proliferation-associated mi RNA expression induced by electroacupuncture might be associated with the improved cerebral blood supply and functional recovery following stroke.展开更多
[目的]观察电针人中穴(GV26)对脑梗死(CI)后内源性神经干细胞增殖、分化的影响。[方法]Wistar大鼠随机分为电针组、模型组、假手术组、空白组,前3组每组24只,按干预和取材的时间分为1、3、7、14 d 4个亚组,空白组6只,采用神经功能缺损...[目的]观察电针人中穴(GV26)对脑梗死(CI)后内源性神经干细胞增殖、分化的影响。[方法]Wistar大鼠随机分为电针组、模型组、假手术组、空白组,前3组每组24只,按干预和取材的时间分为1、3、7、14 d 4个亚组,空白组6只,采用神经功能缺损体征评分(NSS)评定各组大鼠神经功能缺损程度;苏木精-伊红(HE)染色法观察CI后内源性神经干细胞的形态改变;免疫组化、免疫荧光双标记法检测CI后内源性神经干细胞的增殖、分化。[结果]神经功能方面,空白组、假手术组NSS评分无变化,神经功能正常,模型组、电针组CI大鼠随着时间的延长,两组大鼠在感觉、反射、肢体功能等方面均有改善,3、7、14 d时电针组NSS评分低于模型组,两组差异有统计学意义(P<0.05);HE染色,空白组和假手术组脑组织形态未见明显异常,模型组和电针组均可见神经细胞的细胞核固缩、伴细胞空泡,随干预天数增加,逐渐有结缔组织、星形胶质细胞与正常细胞生成,电针组整体修复情况优于模型组;免疫组化,与空白组、假手术组比较,模型组大鼠各时相内源性神经干细胞(eNSPCs)特异性标识物齿状回巢蛋白(Nestin)目标蛋白平均光密度值(AOD)、胶质纤维酸性蛋白(GFAP)AOD均明显升高(P<0.01),与模型组比较,电针组各时相Nestin AOD均较高(P<0.05或P<0.01),3、7、14 d时GFAP AOD均升高(P<0.05或P<0.01);免疫荧光双标记,与空白组、假手术组比较,模型组大鼠Nestin及GFAP表达量均明显升高(P<0.01),荧光信号强,与模型组比较,电针组各时相Nestin表达均升高(P<0.05或P<0.01),Nestin/5-溴脱氧尿嘧啶核苷(BrdU)共标记信号强,3、7、14 d时GFAP表达升高(P<0.05或P<0.01),GFAP/BrdU共标记信号强。[结论]电针人中穴可明显改善CI大鼠神经功能损伤情况,促进内源性神经干细胞的增殖、分化为星形胶质细胞,从而有利于CI后神经功能网络的修复和功能的重建。展开更多
基金supported by the National Natural Science Foundation of China,No.81173416
文摘Electroacupuncture has been shown to improve cerebral blood flow in animal models of stroke. However, it is unclear whether electroacupuncture alters mi RNA expression in the cortex. In this study, we examined changes in the cerebral cortical mi RNA profile, cerebral blood flow and neurological function induced by electroacupuncture in a rat model of stroke. Electroacupuncture was performed at Renzhong（GV26） and Neiguan（PC6）, with a frequency of 2 Hz, continuous wave, current intensity of 3.0 m A, and stimulation time of 1 minute. Electroacupuncture increased cerebral blood flow and alleviated neurological impairment in the rats. mi RNA microarray profiling revealed that the vascular endothelial growth factor signaling pathway, which links cell proliferation with stroke, was most significantly affected by electroacupuncture. Electroacupuncture induced changes in expression of rno-mi R-206-3p, rno-mi R-3473, rno-mi R-6216 and rno-mi R-494-3p, and these changes were confirmed by quantitative real-time polymerase chain reaction. Our findings suggest that changes in cell proliferation-associated mi RNA expression induced by electroacupuncture might be associated with the improved cerebral blood supply and functional recovery following stroke.
