Association of common KIBRA variants with episodic memory and AD risk

作者：Burgess Jeremy D; Pedraza Otto; Graff Radford Neill R; Hirpa Meron; Zou Fanggeng; Miles Richard; Thuy Nguyen; Li Ma; Lucas John A; Ivnik Robert J; Crook Julia; Pankratz V Shane; Dickson Dennis W; Petersen Ronald C; Younkin Steven G; Ertekin Taner Niluefer^*

来源：Neurobiology of Aging, 2011, 32(3): 557.e1.

DOI：10.1016/j.neurobiolaging.2010.11.004

• Alzheimer's disease
• KIBRA
• Association studies in genetics
• Case control studies
• Episodic memory
• Gene expression

KIBRA single nucleotide polymorphism (SNP) rs17070145 was identified in a genome-wide association study (GWAS) of memory performance, with some but not all follow-up studies confirming association of its T allele with enhanced memory. This allele was associated with reduced Alzheimer's disease (AD) risk in 1 study, which also found overexpression of KIBRA in memory-related brain regions of AD. We genotyped rs17070145 and 14 additional SNPs in 2571 late onset Alzheimer's disease (LOAD) patients vs. 2842 controls, including African-Americans. We found significantly reduced risk for rs17070145 T allele in the older African-American subjects (P = 0.007) and a suggestive effect in the older Caucasian series. Meta-analysis of this allele in > 8000 subjects from our and published series showed a suggestive protective effect (P = 0.07). Analysis of episodic memory in control subjects did not identify associations with rs17070145, though other SNPs showed significant associations in 1 series. KIBRA showed evidence of overexpression in the AD temporal cortex (P = 0.06) but not cerebellum. These results suggest a modest role for KiBRA as a cognition and AD risk gene, and also highlight the multifactorial complexity of its genetic associations.

• 出版日期2011-3