促红细胞生成素对低氧状态下神经干细胞增殖、分化的影响

目的:探讨促红细胞生成素(erythropoietin,EPO)对低氧状态下神经干细胞(neural stem cell,NSC)增殖、分化的影响。方法:采用10%低氧环境中无血清悬浮培养胚鼠脑源性NSC;加入EPO,观察和计数NSC克隆形成率,MTT法检测NSC的生长情况;胎牛血清诱导细胞分化,神经元特异性烯醇化酶(neuron-specific enolase,NSE)和神经胶质原纤维酸性蛋白(gliafibrillary acidic protein,GFAP)免疫荧光染色检测NSC的分化情况。结果:培养的细胞经鉴定呈Nestin阳性,分化后部分细胞呈NSE阳性,部分细胞呈GFAP阳性。常氧和低氧组NSC的克隆形成率分别为(32.26±3.26)%和(48.93±4.34)%。低氧+EPO组NSC的克隆形成率比低氧组增加了17.26%;分化后,NSE阳性细胞数目增多。结论:低氧可促进NSC增殖,促进其向神经元方向分化;EPO能进一步促进NSC增殖及向神经元方向分化。

Effects of erythropoietin on the proliferation and differentiation of neural stem cells in hypoxia

Objective:To explore the influence of erythropoietin(EPO) on the proliferation and differentiation of neural stem cells(NSCs) in hypoxia.Methods:The NSCs were put into the incubator with of 10%O2,and EPO was added into the cultures during the proliferation and differentiation period of NSCs.The proliferation of NSCs was evaluated by MTT method and clone calculation.After the differentiation of NSCs with 10% fetal bovine serum(FBS),the differentiation ratio of NSCs into neurons and glia cells was detected by...