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1Inducing dopaminergic differentiation of expanded rat mesencephalic neural stem cells by ascorbic acid in vitro显示文摘Ascorbic acid (AA) induced differentiation of neural stem cells (NSCs) into dopaminergic (DAergic) neurons is reported. NSCs derived from rat mesencephalon were maintained and expanded in a defined medium containing mitogens of basic fibroblast growth factor (bFGF) and epidermal growth factor (EGF). Compared with the control, ascorbic acid treatment led to more DAergic neuronal differentiation as indicated by the expression of tyrosine hydroxylase (TH) and dopamine transporter (DAT), which are specific markers of dopamine neurons. AA induction also enhanced expression of Nurr1 and Shh. PD98059, an inhibitor of mitogen activated protein kinase/extracellular signal regulated kinase (MAPK/ERK) pathway, could block AA induced Nurr1, TH and DAT mRNA expression. The results might suggest a new strategy to provide enough dopaminergic cells for the therapy of Parkinson’s disease (PD), and Nurr1 and ERK signaling pathway might participate in the AA induced DAergic differentiation.ZHENGMin WANGDongmei HOULingling LIHaimin XIEChao JIAOWencang BAICixian WANGYaping PEIXuetao 2004Progress in Natural Science:Materials International2004,14,1:0
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