Functional Implications of miR-19 in the Migration of Newborn Neurons in the Adult Brain

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Altered microRNA profiles have been implicated in human brain disorders. However, the functional contribution of individual microRNAs to neuronal development and function is largely unknown. Here, we report biological functions for miR-19 in adult neurogenesis. We determined that miR-19 is enriched in neural progenitor cells (NPCs) and downregulated during neuronal development in the adult hippocampus. By manipulating miR-19 in NPCs for gain-and loss-of-function studies, we discovered that miR-19 regulates cell migration by directly targeting Rapgef2. Concordantly, dysregulation of miR-19 in NPCs alters the positioning of newborn neurons in the adult brain. Furthermore, we found abnormal expression of miR-19 in human NPCs generated from schizophrenic patient-derived induced pluripotent stem cells (iPSCs) that have been described as displaying aberrant migration. Our study demonstrates the significance of posttranscriptional gene regulation by miR-19 in preventing the irregular migration of adult-born neurons that may contribute to the etiology of schizophrenia.
Publisher
CELL PRESS
Issue Date
2016-07
Language
English
Article Type
Article
Citation

NEURON, v.91, no.1, pp.79 - 89

ISSN
0896-6273
DOI
10.1016/j.neuron.2016.05.034
URI
http://hdl.handle.net/10203/221001
Appears in Collection
MSE-Journal Papers(저널논문)
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