骨形态发生蛋白2对14d胎鼠端脑神经干细胞分化为胆碱能神经元的影响

背景：骨形态发生蛋白2可能是参与胆碱能神经元前体细胞分化的细胞外调控因子。目的：观察骨形态发生蛋白2在孕14d胎鼠端脑神经干细胞诱导成胆碱能神经元过程中的作用。方法：取孕14d胎鼠端脑,用含EDTA的胰酶和Ⅰ型胶原酶消化,无血清培养基培养细胞,种植于涂有多聚赖氨酸的培养板,细胞原代培养24h后半量换液,加入10μg/L骨形态发生蛋白2继续培养。结果与结论：胶原酶消化得到的神经干细胞呈单层贴壁生长;Nestin免疫荧光鉴定细胞为阳性,获取的神经干细胞纯度大于99%;ChAT免疫荧光鉴定骨形态发生蛋白2可以将孕14d胎鼠端脑神经干细胞诱导成胆碱能神经元,细胞纯度大于97%。

Effects of bone morphogenetic proteins 2 on neural stem cells of 14-day-old fetal rat telencephalon differentiating into cholinergic neurons

BACKGROUND： Bone morphogenetic protein-2 （BMP2） may be an extracellular regulatory factor involved in cholinergic differentiation of neuronal precursor cells. OBJECTIVE： To explore the effects of BMP2 on neural stem cells of 14-day-old fetus rat telencephalons induced into cholinergic neurons. METHODS： Fetus telencephalons of 14-day-old SD rats were isolated, and tissues were divisively treated with collagenase typeⅠcontained EDTA following trituration. The cells were raised in polylysine culture plates with serum-free medium. Primary culture medium was changed half after 24 hours, and 10 μg/L BMP2 was added. RESULTS AND CONCLUSION： The adherent monoculture neural stem cells could been obtained using collagenase. The Nestin positve cells were obtained, and the purity was over 99%. After induced by BMP2, the ChAT positve cells were obtained, and the purity was over 97%. BMP2 can induce neural stem cells of 14-day-old fetus rat telencephalons into cholinergic neurons.