期刊
ALZHEIMERS & DEMENTIA
卷 19, 期 5, 页码 1925-1937出版社
WILEY
DOI: 10.1002/alz.12851
关键词
Alzheimer's disease; blood; genotypes; MCP-1
Elevated blood levels of monocyte chemoattractant protein-1 (MCP-1) are associated with increased risk of Alzheimer's disease (AD) in certain genotypes, possibly through the blood-brain barrier (BBB) pathways.
IntroductionC-Reactive protein (CRP) and monocyte chemoattractant protein-1 (MCP-1) are both implicated in the peripheral proinflammatory cascade and blood-brain barrier (BBB) disruption. Since the blood CRP level increases Alzheimer's disease (AD) risk depending on the apolipoprotein E (APOE) genotype, we hypothesized that the blood MCP-1 level exerts different effects on the AD risk depending on the genotypes. MethodsUsing multiple regression analyses, data from the Framingham Heart Study (n = 2884) and Alzheimer's Disease Neuroimaging Initiative study (n = 231) were analyzed. ResultsAn elevated blood MCP-1 level was associated with AD risk in major histocompatibility complex, Class II, DR beta 1 (HLA-DRB1) rs9271192-AC/CC (hazard ratio [HR] = 3.07, 95% confidence interval [CI] = 1.50-6.28, p = 0.002) and in APOE epsilon 4 carriers (HR = 3.22, 95% CI = 1.59-6.53, p = 0.001). In contrast, among HLA-DRB1 rs9271192-AA and APOE epsilon 4 noncarriers, blood MCP-1 levels were not associated with these phenotypes. DiscussionSince HLA-DRB1 and APOE are expressed in the BBB, blood MCP-1 released in the peripheral inflammatory cascade may function as a mediator of the effects of HLA-DRB1 rs9271192-AC/CC and APOE epsilon 4 genotypes on AD pathogenesis in the brain via the BBB pathways.
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