Transiently impaired neurogenesis in MPTP mouse model of Parkinson's disease

文献类型： 外文期刊

第一作者： He, Xi Jun

作者： He, Xi Jun;He, Xi Jun;Nakayama, Hiroyuki

作者机构：

关键词： MPTP;Animal model;Parkinson's disease;Neurogenesis

期刊名称：NEUROTOXICOLOGY （ 影响因子：4.294； 五年影响因子：4.351 ）

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收录情况： SCI

摘要： It is still being debated whether neurogenesis in the subventricular zone (SVZ) is enhanced in response to 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) injury in the adult mouse brain. Our previous studies provided evidence that MPTP induces apoptosis of migrating neuroblasts (neural progenitor cells, A cells) in the SVZ and rostral migratory stream (RMS). We investigated cellular kinetics in the adult SVZ and olfactory bulb (OB) after MPTP damage. Cells were labeled with bromodeoxyuridine (BrdU), and the effects of MPTP on the survival and fate of migrating and residing neuroblasts were evaluated. Two days after BrdU labeling and MPTP treatment, the number of BrdU-positive cells in the SVZ and OB of MPTP-treated mice was significantly lower than in the SVZ and OB of saline controls. Additionally, fewer BrdU-positive cells migrated to the OB of treated mice than to that of saline controls, and the cells that did migrate diffused radially into the granule cell layer (GCL) when observed at 7, 14, and 28 days. In the OB GCL, the differentiation of BrdU-positive cells into mature neurons significantly attenuated 14 and 28 days after MPTP injury. Moreover, the impaired neurogenesis was followed by a recovery of A cells in the SVZ and OB, suggesting activation of the self-repair process as a result of MPTP-induced depletion of BrdU-positive cells. Our findings clarify the kinetics underlying neurogenesis in MPTP-treated mice and may contribute to the development of an animal model of Parkinson's disease, and the demonstration of cellular kinetics in SVZ may also provide a new insight into assessing neurogenesis in MPTP-treated mouse. (C) 2015 Elsevier Inc. All rights reserved.

分类号： R99

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