Objective To investigate the ascorbic acid( AA)-induced differentiation of neural stem cells( NSCs) to dopaminergic neurons and explore the mechanism preliminarily. Methods NSCs derived from12. 5 d rat embryo mesencephalon were maintained and amplified. Cells were divided into a control group and AA-induced groups with AA concentration of 1,10,50,100 μmol / L,and 200 μmol / L. The differentiation results of NSCs to dopaminergic neurons in the groups were compared. Immunocytochemistry was carried out to iden...