Influence of Alzheimer's disease genes on cognitive decline: the Guangzhou Biobank Cohort Study

NEUROBIOLOGY OF AGING

卷:35

Article

Gui, Hongsheng¹  Jiang, Chao Qiang²  Cherny, Stacey S.^1,3,4  Sham, Pak Chung^1,3  Xu, Lin⁵  Liu, Bin²  Jin, Ya Li²  Zhu, Tong²  Zhang, Wei Sen²  Thomas, G. Neil⁶  Cheng, Kar Keung⁶  Tai Hing Lam⁵ 

[1] Univ Hong Kong, Dept Psychiat, Hong Kong, Hong Kong, Peoples R China

[2] Guangzhou 12 Hosp, Guangzhou, Guangdong, Peoples R China

[3] Univ Hong Kong, State Key Lab Brain & Cognit Sci, Hong Kong, Hong Kong, Peoples R China

[4] Univ Hong Kong, LKS Fac Med, Ctr Genom Sci, Hong Kong, Hong Kong, Peoples R China

[5] Univ Hong Kong, Sch Publ Hlth, Hong Kong, Hong Kong, Peoples R China

[6] Univ Birmingham, Dept Publ Hlth Epidemiol & Biostat, Birmingham, W Midlands, England

关键词: Cognitive decline;    Alzheimer's disease;    ACE;    APOE;    Joint effect;   

DOI  :  10.1016/j.neurobiolaging.2014.04.022

来源: Elsevier

【 摘 要 】

Cognitive decline is a reduction in cognitive ability usually associated with aging, and those with more extreme cognitive decline either have or are at risk of progressing to mild cognitive impairment and dementia including Alzheimer's disease (AD). We hypothesized that genetic variants predisposing to AD should be predictive of cognitive decline in elderly individuals. We selected 1325 subjects with extreme cognitive decline and 1083 well-matched control subjects from the Guangzhou Biobank Cohort Study in which more than 30,000 southern Chinese older people have been recruited and followed up. Thirty single-nucleotide polymorphisms in 29 AD-associated genes were genotyped. No statistically significant allelic associations with cognitive decline were found by individual variant analysis. At the level of genotypic association, we confirmed that the APOE epsilon 4 homozygote significantly accelerated cognitive decline and found that carriers of the ACE rs1800764_C allele were more likely to show cognitive decline than noncarriers, particularly in those without college education. However, these effects do not survive after multiple testing corrections, and together they only explain 1.7% of the phenotypic variance in cognitive score change. This study suggests that AD risk variants and/or genes are not powerful predictors of cognitive decline in our Chinese sample. (C) 2014 Elsevier Inc. All rights reserved.

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