期刊
JOURNAL OF THE NEUROLOGICAL SCIENCES
卷 283, 期 1-2, 页码 199-206出版社
ELSEVIER
DOI: 10.1016/j.jns.2009.03.002
关键词
ApoE4; Alzheimer's disease; Cerebral blood flow; Electron microscopy; Vascular and mitochondrial damage; Mitochondrial antioxidant and cognitive performance
资金
- NIGMS NIH HHS [R25 GM060655-07, GM 60655, R25 GM060655] Funding Source: Medline
We measured age-dependent effects of human ApoE4 on cerebral blood flow (CBF) using ApoE4 transgenic mice compared to age-matched wild-type (WT) mice by use of [C-14] iodoantipyrene autoradiography. ApoE4 associated factors reduce CBF gradually to create brain hypoperfusion when compared to WT, and the differences in CBF are greatest as animals age from 6-weeks to 12-months. Transmission electron microscopy with colloidal gold immunocytochemistry showed structural damage in young and aged microvessel endothelium of ApoE4 animals extended to the cytoplasm of perivascular cells, perivascular nerve terminals and hippocampal neurons and glial cells. These abnormalities coexist with mitochondrial structural alteration and mitochondrial DNA overproliferation and/or deletion in all brain cellular compartments. Spatial memory and temporal memory tests showed a trend in improving cognitive function in ApoE4 mice fed selective mitochondrial antioxidants acetyl-l-carnitine and R-alpha-lipoic acid. Our findings indicate that ApoE4 genotypeinduced mitochondrial changes and associated structural damage may explain age-dependent pathology seen in AD, indicating potential for novel treatment strategies in the near future. (C) 2009 Elsevier B.V. All rights reserved.
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