Linkage and association of successful aging to the 6q25 region in large Amish kindreds.

Authors: Edwards DR; Gilbert JR; Hicks JE; Myers JL; Jiang L; Cummings AC; Guo S; Gallins PJ; Konidari I; Caywood L; Reinhart-Mercer L; Fuzzell D; Knebusch C; Laux R; Jackson CE; Pericak-Vance MA; Haines JL; Scott WK

Abstract: Successful aging (SA) is a multidimensional phenotype involving living to older age with high physical function, preserved cognition, and continued social engagement. Several domains underlying SA are heritable, and identifying health-promoting polymorphisms and their interactions with the environment could provide important information regarding the health of older adults. In the present study, we examined 263 cognitively intact Amish individuals age 80 and older (74 SA and 189 "normally aged") all of whom are part of a single 13-generation pedigree. A genome-wide association study of 630,309 autosomal single nucleotide polymorphisms (SNPs) was performed and analyzed for linkage using multipoint analyses and for association using the modified quasi-likelihood score test. There was evidence for linkage on 6q25-27 near the fragile site FRA6E region with a dominant model maximum multipoint heterogeneity LOD score = 3.2. The 1-LOD-down support interval for this linkage contained one SNP for which there was regionally significant evidence of association (rs205990, p = 2.36 x 10(-5)). This marker survived interval-wide Bonferroni correction for multiple testing and was located between the genes QKI and PDE10A. Other areas of chromosome 6q25-q27 (including the FRA6E region) contained several SNPs associated with SA (minimum p = 2.89 x 10(-6)). These findings suggest potentially novel genes in the 6q25-q27 region linked and associated with SA in the Amish; however, these findings should be verified in an independent replication cohort.

Journal: Age (Dordrecht, Netherlands)
Date: July 10, 2012
PMID: 22773346
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Notes:

630,309 SNPs were examined by genome-wide linkage and association study among 74 successfully aged (35% female, mean age 81.82 years) and 189 "normally aged" (67% female, mean age 83.74 years) Amish adults over age 80

There was evidence for linkage on 6q25-27 near the fragile site FRA6E region with a dominant model maximum multipoint heterogeneity LOD score = 3.2. The 1-LOD-down support interval for this linkage contained one SNP for which there was regionally significant evidence of association (rs205990, p = 2.36 × 10−5). This marker survived interval-wide Bonferroni correction for multiple testing and was located between the genes QKI and PDE10A.



Categories: Single-Nucleotide Polymorphism
Citation:

Edwards DR, Gilbert JR, Hicks JE, Myers JL, Jiang L, Cummings AC, Guo S, Gallins PJ, Konidari I, Caywood L, Reinhart-Mercer L, Fuzzell D, Knebusch C, Laux R, Jackson CE, Pericak-Vance MA, Haines JL, Scott WK (2012) Linkage and association of successful aging to the 6q25 region in large Amish kindreds. Age (Dordrecht, Netherlands).


Lifespan Factors:
  • QKI quaking homolog, KH domain RNA binding (mouse)
  • PDE10A phosphodiesterase 10A


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