低氧对大鼠大脑皮层神经干细胞增殖和分化的影响
发布时间:2018-10-18 16:43
【摘要】:目的:观察和分析不同低氧浓度对大鼠大脑皮层神经干细胞(neural stem cells,NSC S)增殖和分化的影响。方法:在1%O2、4%O2和常氧环境(20%O2)下培养新生SD大鼠神经干细胞,对神经球计数并测量其直径,分析不同低氧对神经干细胞增殖效率和增殖速度的影响;分化48 h后行β微管蛋白Ⅲ(β-tubulin III)和胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP)免疫细胞荧光染色,对神经元和星形胶质细胞进行计数并分别计算各占的比例。结果:(1)低氧对神经干细胞增殖效率和增殖速度的影响:1%低氧组神经球数量明显低于常氧对照组,具有显著性差异(P0.05);4%低氧组神经球数量高于对照组,具有显著性差异(P0.05)。在24 h、36 h和48 h,1%低氧组神经球的直径都小于对照组,在24 h和36 h时具有显著性差异(P0.05),在48 h具有非常显著性差异(P0.01);在24 h、36 h和48 h,4%低氧组神经球的直径都大于对照组,在36 h时具有显著性差异(P0.05),在48 h具有非常显著性差异(P0.01)。(2)1%低氧组神经元的比例(0.614±0.056)显著高于其对照组(0.471±0.067)(P0.01);而1%低氧组星形胶质细胞的比例(0.241±0.051)低于其对照组(0.322±0.067)(P0.05)。4%低氧组神经元的比例(0.625±0.072)显著高于其对照组(0.513±0.032)(P0.05);而4%低氧组星形胶质细胞的比例(0.237±0.053)显著低于其对照组(0.285±0.042)(P0.05)。结论:和常氧对照组相比,4%O2促进大鼠大脑皮层神经干细胞的增殖,而1%O2抑制了神经干细胞的增殖;1%O2和4%O2都促进神经干细胞向神经元方向分化,同时抑制向星形胶质细胞分化,1%O2的这种作用更为显著。
[Abstract]:Aim: to observe and analyze the effects of hypoxia on the proliferation and differentiation of neural stem cells (neural stem cells,NSC S) in rat cerebral cortex. Methods: neural stem cells (NSCs) of newborn SD rats were cultured in the presence of O2 and normoxic environment (20%O2). The nerve spheres were counted and their diameters were measured. The effects of hypoxia on the proliferation efficiency and proliferation rate of NSCs were analyzed. After 48 h of differentiation, 尾 -tubulin 鈪,
本文编号:2279732
[Abstract]:Aim: to observe and analyze the effects of hypoxia on the proliferation and differentiation of neural stem cells (neural stem cells,NSC S) in rat cerebral cortex. Methods: neural stem cells (NSCs) of newborn SD rats were cultured in the presence of O2 and normoxic environment (20%O2). The nerve spheres were counted and their diameters were measured. The effects of hypoxia on the proliferation efficiency and proliferation rate of NSCs were analyzed. After 48 h of differentiation, 尾 -tubulin 鈪,
本文编号:2279732
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