期刊
NEUROBIOLOGY OF AGING
卷 32, 期 3, 页码 398-406出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.neurobiolaging.2009.03.003
关键词
Alzheimer's disease; Amyloid beta; Mitochondrial permeability transition pore; Cyclophilin D
资金
- USPHS [PO1 AG17490, PO50 AG08702]
- Alzheimer's Association
Mitochondrial stress is one of the early features of Alzheimer disease (AD). Mitochondrial A beta has been linked to mitochondrial toxicity. Our recent study demonstrated that cyclophilin D (CypD) mediated mitochondrial permeability transition pore (mPTP) is an important mechanism for neuronal and synaptic stress induced by both A beta and oxidative stress. In transgenic AD-type mice overexpressing mutant amyloid precursor protein (APP) and A beta (mAPP), CypD deficiency improves mitochondrial and synaptic function and learning/memory up to 12 months old. Here we provide evidence of the protective effects of CypD deficiency in aged AD mice (22-24 months). Cyp D deficient mAPP mice demonstrate less calcium-induced mitochondrial swelling, increased mitochondrial calcium uptake capacity, preserved mitochondrial respiratory function and improved spatial learning/memory even in old age (known to be the age for late stage AD pathology and synaptic dysfunction). These data demonstrate that abrogation of CypD results in persistent life-long protection against A beta toxicity in an Alzheimer's disease mouse model, thereby suggesting that blockade of CypD may be of benefit for Alzheimer disease treatment. (C) 2009 Elsevier Inc. All rights reserved.
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