Intermediate Phenotypes Identify Divergent Pathways to Alzheimer's Disease

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Intermediate Phenotypes Identify Divergent Pathways to Alzheimer's Disease

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Title: Intermediate Phenotypes Identify Divergent Pathways to Alzheimer's Disease
Author: Aubin, Cristin; Schneider, Julie A.; Bennett, David A.; Shulman, Joshua Marc; Chibnik, Lori; De Jager, Philip Lawrence

Note: Order does not necessarily reflect citation order of authors.

Citation: Shulman, Joshua M., Lori B. Chibnik, Cristin Aubin, Julie A. Schneider, David A. Bennett, and Philip L. De Jager. 2010. Intermediate phenotypes identify divergent pathways to Alzheimer's disease. PLoS ONE 5(6): e11244.
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Abstract: Background: Recent genetic studies have identified a growing number of loci with suggestive evidence of association with susceptibility to Alzheimer's disease (AD). However, little is known of the role of these candidate genes in influencing intermediate phenotypes associated with a diagnosis of AD, including cognitive decline or AD neuropathologic burden. Methods/Principal Findings: Thirty-two single nucleotide polymorphisms (SNPs) previously implicated in AD susceptibility were genotyped in 414 subjects with both annual clinical evaluation and completed brain autopsies from the Religious Orders Study and the Rush Memory and Aging Project. Regression analyses evaluated the relation of SNP genotypes to continuous measures of AD neuropathology and cognitive function proximate to death. A SNP in the zinc finger protein 224 gene (ZNF224, rs3746319) was associated with both global AD neuropathology (p = 0.009) and global cognition (p = 0.002); whereas, a SNP at the phosphoenolpyruvate carboxykinase locus (PCK1, rs8192708) was selectively associated with global cognition (p = 3.57×10−4). The association of ZNF224 with cognitive impairment was mediated by neurofibrillary tangles, whereas PCK1 largely influenced cognition independent of AD pathology, as well as Lewy bodies and infarcts. Conclusions/Significance: The findings support the association of several loci with AD, and suggest how intermediate phenotypes can enhance analysis of susceptibility loci in this complex genetic disorder.
Published Version: doi:10.1371/journal.pone.0011244
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2888589/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4879184

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