期刊
NEUROSCIENCE
卷 240, 期 -, 页码 39-53出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuroscience.2013.02.048
关键词
mouse Dach1 gene; adult neurogenesis/gliogenesis; MCAo; patch-clamp; interneurons; rostral migratory stream
资金
- Grant Agency of the Czech Republic [CZ: GA CR: P303/12/0855, P304/12/G069]
- Academy of Sciences of the Czech Republic [UEM AV CR - AV0Z50390703]
The mouse Dach1 gene, involved in the development of the neocortex and the hippocampus, is expressed by neural stem cells (NSCs) during early neurogenesis, and its expression also continues in a subpopulation of cells in the dorsal part of the lateral ventricles (LV) of the adult mouse brain. In this study we aimed to elucidate the role of Dach1-expressing cells in adult neurogenesis/gliogenesis under physiological as well as post-ischemic conditions, employing transgenic mice in which the expression of green fluorescent protein (GFP) is controlled by the D6 promotor of the mouse Dach1 gene. A neurosphere-forming assay of GFP(+) cells isolated from the dorsal part of the LV was carried out with subsequent differentiation in vitro. To elucidate the neurogenic/gliogenic potential of GFP(+) cells in the dorsal part of the LV, in situ immunohistochemical/electrophysiological analyses of GFP cells in adult sham-operated brains (controls) and those after middle cerebral artery occlusion (MCAo) were performed. The GFP(+) cells isolated from the dorsal part of the LV of controls formed neurospheres and differentiated solely into a glial phenotype, while those isolated after MCAo also gave rise to cells with the properties of neuronal precursors. In situ analyses revealed that GFP(+) cells express the phenotype of adult NSCs or neuroblasts in controls as well as following ischemia. Following MCAo we found a significantly increased number of GFP cells expressing doublecortin as well as a number of GFP cells migrating through the rostral migratory stream into the olfactory bulb, where they probably differentiated into calretinin(+) interneurons. Collectively, our results suggest the involvement of the mouse Dach1 gene in adult neurogenesis; cells expressing this gene exhibit the properties of adult NSCs or neuroblasts and respond to MCAo by enhanced neurogenesis. (C) 2013 IBRO. Published by Elsevier Ltd. All rights reserved.
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