Journal
NEUROBIOLOGY OF AGING
Volume 32, Issue 3, Pages 407-418Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.neurobiolaging.2009.03.009
Keywords
Alzheimer's disease; Amyloid-beta peptide; Hippocampus; Neurogenesis; Learning and memory; Brain blood perfusion
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Funding
- Sanofi-Aventis
- Del Duca Foundation
- ACT
- ANR
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Amyloid-beta peptide species accumulating in the brain of patients with Alzheimer's disease are assumed to have a neurotoxic action and hence to be key actors in the physiopathology of this neurodegenerative disease. We have studied a new mouse mutant (APPxPS1-Ki) line developing both early-onset brain amyloid-beta deposition and, in contrast to most of transgenic models, subsequent neuronal loss. In 6-month-old mice, we observed cell layer atrophies in the hippocampus, together with a dramatic decrease in neurogenesis and a reduced brain blood perfusion as measured in vivo by magnetic resonance imaging. In these mice, neurological impairments and spatial hippocampal dependant memory deficits were also substantiated and worsened with aging. We described here a phenotype of APPxPS1-Ki mice that summarizes several neuroanatomical alterations and functional deficits evocative of the human pathology. Such a transgenic model that displays strong face validity might be highly beneficial to future research on AD physiopathogeny and therapeutics. (C) 2009 Elsevier Inc. All rights reserved.
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