title: Effects of mild chronic cerebral hypoperfusion and early amyloid pathology on spatial learning and the cellular innate immune response in mice.
abstract: Understanding the contribution of cerebrovascular factors in the progression of cognitive decline in Alzheimer's disease (AD) is a key step for the development of preventive therapies. Among these factors, chronic cerebral hypoperfusion is an early component of AD pathogenesis that can predict the progression from mild cognitive impairment to AD. Here, we investigated the effects of a protocol of mild chronic cerebral hypoperfusion in the APPswe/PS1 transgenic mouse model of AD. We observed that the permanent occlusion of the right common carotid artery induced spatial learning impairments in young APPswe/PS1 mice, but not in their wild type littermates. Furthermore, the extent of learning deficits strongly correlated with the number of cortical β-amyloid plaques, with the mobilization of monocytes into the blood and with the number of bone marrow-derived microglia in the brain. These results indicate that a mild reduction of cerebral blood flow can selectively induce cognitive deficits at an early stage of amyloid pathology, eliciting a cellular innate immune response, even without causing neuronal death.
authors: Laboratory of Endocrinology and Genomics, CHUQ (CHUL) Research Center and Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec, Canada.
authors: Pedro M
authors: PM
authors: Pimentel-Coelho
authors: Jean-Philippe
authors: JP
authors: Michaud
authors: Serge
authors: S
authors: Rivest
mesh_terms: D000544:Alzheimer Disease / Q000235:genetics / Q000276:immunology / Q000473:pathology; D016564:Amyloid beta-Protein Precursor / Q000235:genetics*; D000818:Animals; D002545:Brain Ischemia / Q000276:immunology / Q000473:pathology / Q000503:physiopathology; D002540:Cerebral Cortex / Q000098:blood supply / Q000276:immunology / Q000473:pathology; D002560:Cerebrovascular Circulation; D004195:Disease Models, Animal; D059647:Gene-Environment Interaction; D020022:Genetic Predisposition to Disease; D007111:Immunity, Cellular / Q000276:immunology*; D007113:Immunity, Innate; D008297:Male; D051379:Mice; D008822:Mice, Transgenic; D017628:Microglia / Q000166:cytology / Q000276:immunology; D009000:Monocytes / Q000166:cytology / Q000276:immunology; D058225:Plaque, Amyloid / Q000473:pathology
chemical_list: D016564:Amyloid beta-Protein Precursor