期刊
BRAIN RESEARCH BULLETIN
卷 80, 期 4-5, 页码 296-301出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.brainresbull.2009.06.007
关键词
Ganglionic eminence; Neural progenitor cell; Neuritic outgrowth; Neurogenesis; Neuronal morphology; Striatum
资金
- NIA NIH HHS [R37 AG017926, R01 AG008200, R01 AG008200-21] Funding Source: Medline
- NINDS NIH HHS [R01 NS047229] Funding Source: Medline
The presenilin-1 gene is mutated in early-onset familial Alzheimer's disease. The mutation Pro117Leu is implicated in a very severe form of the disease, with an onset of less than 30 years. The consequences of this mutation on neurogenesis in the hippocampus of adult transgenic mice have already been studied in situ. The survival of neural progenitor cells was impaired resulting in decreased neurogenesis in the dentate gyrus. Our intention was to verify if similar alterations could occur in vitro in progenitor cells from the murine ganglionic eminences isolated from embryos of this same transgenic mouse model. These cells were grown in culture as neurospheres and after differentiation the percentage of neurons generated as well as their morphology were analysed. The mutation results in a significant decrease in neurogenesis compared to the wild type mice and the neurons grow longer and more ramified neurites. A shift of differentiation towards gliogenesis was observed that could explain decreased neurogenesis despite increased proliferation of neural precursors in transgenic neurospheres. A diminished survival of the newly generated mutant neurons is also proposed. Our data raise the possibility that these alterations in embryonic development might contribute to increase the severity of the Alzheimer's disease phenotype later in adulthood. (C) 2009 Elsevier Inc. All rights reserved.
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