文章基本信息

标题：microRNA-34a regulates neurite outgrowth, spinal morphology, and function
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作者：Massimiliano Agostini ; Paola Tucci ; Joern R. Steinert 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2011
卷号：108
期号：52
页码：21099-21104
DOI：10.1073/pnas.1112063108
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The p53 family member TAp73 is a transcription factor that plays a key role in many biological processes, including neuronal development. In particular, we have shown that p73 drives the expression of miR-34a, but not miR-34b and c, in mouse cortical neurons. miR-34a in turn modulates the expression of synaptic targets including synaptotagmin-1 and syntaxin-1A. Here we show that this axis is retained in mouse ES cells committed to differentiate toward a neurological phenotype. Moreover, overexpression of miR-34a alters hippocampal spinal morphology, and results in electrophysiological changes consistent with a reduction in spinal function. Therefore, the TAp73/miR-34a axis has functional relevance in primary neurons. These data reinforce a role for miR-34a in neuronal development.
关键词：cell death ; synaptogenesis ; neuronal differentiation ; hippocampus