期刊
MOLECULAR AND CELLULAR NEUROSCIENCE
卷 31, 期 2, 页码 251-262出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.mcn.2005.09.014
关键词
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Glial cells have been classically neurons. Recently, additional roles during neural development have begun to emerge. Here, we report that ventral midbrain glia, including astrocytes and radial glia, are the source of signals required by neural precursors to acquire a dopaminergic phenotype. We found that ventral midbrain glia, but not cortical glia, secrete high levels of the glycolipoprotein Wnt-5a, express region-specific transcription factors such as Pax-2, En-1 and Otx-2 and increase the differentiation of cortical or ventral midbrain Nurr1 precursors into tyrosine hydroxylase-positive neurons. Moreover, blocking experiments using a Wnt-5a blocking antibody indicated that the effects of ventral midbrain glia on Nurr1-positive neural precursors are partially mediated by Wnt-5a. Thus, our results identify Wnt-5a as an important component of the dopaminergic inductive activity of the ventral midbrain glia. (c) 2005 Elsevier Inc. All rights reserved.
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