目的观察丹龙醒脑方对脑缺血再灌注模型大鼠侧脑室室管膜下区(SVZ)神经干细胞(NSCs)增殖与Hes1、Hes5表达的影响,探讨其促进内源性NSCs增殖的作用机制。方法将80只雄性SD大鼠随机分为假手术组、模型组、依达拉奉组(依达组)、丹龙醒脑方...目的观察丹龙醒脑方对脑缺血再灌注模型大鼠侧脑室室管膜下区(SVZ)神经干细胞(NSCs)增殖与Hes1、Hes5表达的影响,探讨其促进内源性NSCs增殖的作用机制。方法将80只雄性SD大鼠随机分为假手术组、模型组、依达拉奉组(依达组)、丹龙醒脑方组(丹龙组)。采用线栓法制备局灶性脑缺血再灌注模型,再灌注7 d后取缺血侧SVZ脑组织。Brdu免疫荧光法检测SVZ NSCs增殖,RT-q PCR、Western blot分别检测Hes1、Hes5 m RNA和蛋白的表达。结果与假手术组比较,其余各组Brdu阳性细胞率增加,Hes1、Hes5 m RNA及蛋白表达明显升高(P<0.01);与模型组比较,依达组、丹龙组Brdu阳性细胞率明显增加,Hes1、Hes5 m RNA及蛋白表达水平明显增强(P<0.01);丹龙组Hes1 m RNA表达水平优于依达组(P<0.01),其余指标均无明显差异。结论丹龙醒脑方可促进脑缺血再灌注后大鼠SVZ NSCs增殖,并上调Hes1、Hes5表达水平,其机制可能与激活Notch信号通路有关。展开更多
In this study, we investigated non-captive four-striped mice （Rhabdomys pumilio） for evidence that adult neurogenesis occurs in the adult brain of animal models in natural environment. Ki-67 （a marker for cell prol...In this study, we investigated non-captive four-striped mice （Rhabdomys pumilio） for evidence that adult neurogenesis occurs in the adult brain of animal models in natural environment. Ki-67 （a marker for cell proliferation） and doublecortin （a marker for immature neurons） immunos-taining conifrmed that adult neurogenesis occurs in the active sites of subventricular zone of the lateral ventricle with the migratory stream to the olfactory bulb, and the subgranular zone of the dentate gyrus of the hippocampus. No Ki-67 proliferating cells were observed in the striatum substantia nigra, amygdala, cerebral cortex or dorsal vagal complex. Doublecortin-immunore-active cells were observed in the striatum, third ventricle, cerebral cortex, amygdala, olfactory bulb and along the rostral migratory stream but absent in the substantia nigra and dorsal vagal complex. The potential neurogenic sites in the four-striped mouse species could invariably lead to increased neural plasticity.展开更多
文摘目的观察丹龙醒脑方对脑缺血再灌注模型大鼠侧脑室室管膜下区(SVZ)神经干细胞(NSCs)增殖与Hes1、Hes5表达的影响,探讨其促进内源性NSCs增殖的作用机制。方法将80只雄性SD大鼠随机分为假手术组、模型组、依达拉奉组(依达组)、丹龙醒脑方组(丹龙组)。采用线栓法制备局灶性脑缺血再灌注模型,再灌注7 d后取缺血侧SVZ脑组织。Brdu免疫荧光法检测SVZ NSCs增殖,RT-q PCR、Western blot分别检测Hes1、Hes5 m RNA和蛋白的表达。结果与假手术组比较,其余各组Brdu阳性细胞率增加,Hes1、Hes5 m RNA及蛋白表达明显升高(P<0.01);与模型组比较,依达组、丹龙组Brdu阳性细胞率明显增加,Hes1、Hes5 m RNA及蛋白表达水平明显增强(P<0.01);丹龙组Hes1 m RNA表达水平优于依达组(P<0.01),其余指标均无明显差异。结论丹龙醒脑方可促进脑缺血再灌注后大鼠SVZ NSCs增殖,并上调Hes1、Hes5表达水平,其机制可能与激活Notch信号通路有关。
基金supported by Individual Faculty Research GrantSwiss-South Africa Joint Research Progamme(SSAJRP)
文摘In this study, we investigated non-captive four-striped mice （Rhabdomys pumilio） for evidence that adult neurogenesis occurs in the adult brain of animal models in natural environment. Ki-67 （a marker for cell proliferation） and doublecortin （a marker for immature neurons） immunos-taining conifrmed that adult neurogenesis occurs in the active sites of subventricular zone of the lateral ventricle with the migratory stream to the olfactory bulb, and the subgranular zone of the dentate gyrus of the hippocampus. No Ki-67 proliferating cells were observed in the striatum substantia nigra, amygdala, cerebral cortex or dorsal vagal complex. Doublecortin-immunore-active cells were observed in the striatum, third ventricle, cerebral cortex, amygdala, olfactory bulb and along the rostral migratory stream but absent in the substantia nigra and dorsal vagal complex. The potential neurogenic sites in the four-striped mouse species could invariably lead to increased neural plasticity.
