期刊
JOURNAL OF ALZHEIMERS DISEASE
卷 41, 期 1, 页码 233-241出版社
IOS PRESS
DOI: 10.3233/JAD-132417
关键词
Alzheimer's disease; 5XFAD mice; amyloid plaque; adult neurogenesis; hippocampus; ghrelin
资金
- NRF [2012R1A2A1A01002881]
- NRF (MRC) [2011-0030738]
- KNIH ROAD R&D Program Project [A092058]
- SNU Hospital [03-2012-0120]
Alzheimer's disease (AD) is an age-related neurological disorder characterized by the deposition of amyloid-beta (A beta), cognitive deficits, and neuronal loss. The decline in neurogenic capacity could participate in neuronal vulnerability and contribute to memory impairment in AD. In our longitudinal study with AD model mice (5XFAD mice), we found that the number of doublecortin (neurogenesis marker)-positive cells in 5XFAD mice was significantly decreased compared to wild-type littermate mice. Using A beta immunostaining with 4G8 antibody, we observed that impairment in neurogenesis might be associated with the deposits of amyloid plaques. To investigate the effect of the neurogenic hormone ghrelin on defective neurogenesis in the AD brain, 5XFAD mice were administered peripherally with ghrelin. We found that treatment with ghrelin increased the number of doublecortin, HH3, and calretinin-stained cells in the hippocampus of 5XFAD mice. In 5XFAD mice treated with ghrelin, the 4G8-positive area was not significantly different from the saline-treated 5XFAD mice. Together, these findings suggest that hippocampal neurogenesis is impaired in 5XFAD mice and that treatment with ghrelin successfully rescued the abnormality of neurogenesis in 5XFAD mice without affecting A beta pathology.
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