http://www.nrronline.org/article.asp?issn=1673-5374;year=2015;volume=10;issue=2;spage=277;epage=285;aulast=Li
Qing-quan Li1, Guan-qun Qiao1, Jun Ma1, Hong-wei Fan2, Ying-bin Li1
1 Department of Neurosurgery, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
2 Department of Neurosurgery, the First Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
Date of Acceptance | 13-Oct-2014 |
Date of Web Publication | 18-Mar-2015 |
Ying-bin Li
Department of Neurosurgery, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province
China
DOI: 10.4103/1673-5374.152383
Abstract |
The
present study examines the hypothesis that endogenous neural progenitor
cells isolated from the neocortex of ischemic brain can differentiate
into neurons or glial cells and contribute to neural regeneration. We
performed middle cerebral artery occlusion to establish a model of
cerebral ischemia/reperfusion injury in adult rats. Immunohistochemical
staining of the cortex 1, 3, 7, 14 or 28 days after injury revealed that
neural progenitor cells double-positive for nestin and sox-2 appeared
in the injured cortex 1 and 3 days post-injury, and were also positive
for glial fibrillary acidic protein. New neurons were labeled using
bromodeoxyuridine and different stages of maturity were identified using
doublecortin, microtubule-associated protein 2 and neuronal nuclei
antigen immunohistochemistry. Immature new neurons coexpressing
doublecortin and bromodeoxyuridine were observed in the cortex at 3 and 7
days post-injury, and semi-mature and mature new neurons
double-positive for microtubule-associated protein 2 and
bromodeoxyuridine were found at 14 days post-injury. A few mature new
neurons coexpressing neuronal nuclei antigen and bromodeoxyuridine were
observed in the injured cortex 28 days post-injury. Glial fibrillary
acidic protein/bromodeoxyuridine double-positive astrocytes were also
found in the injured cortex. Our findings suggest that neural progenitor
cells are present in the damaged cortex of adult rats with cerebral
ischemic brain injury, and that they differentiate into astrocytes and
immature neurons, but most neurons fail to reach the mature stage.
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