期刊
AGE
卷 35, 期 1, 页码 235-249出版社
SPRINGER
DOI: 10.1007/s11357-011-9340-3
关键词
Genetics; Aging; Longevity; Gene set analysis; Insulin/IGF-1 signaling; Telomere maintenance
资金
- European Union [259679]
- Innovation-Oriented Research Program on Genomics [SenterNovem IGE05007]
- Centre for Medical Systems Biology
- Netherlands Consortium for Healthy Ageing [050-060-810]
- Unilever Colworth
- Netherlands Organisation for Scientific Research NWO Investments [175.010.2005.011, 911-03-012]
- Research Institute for Diseases in the Elderly [014-93-015, RIDE2]
- Netherlands Genomics Initiative (NGI)/Netherlands Organisation for Scientific Research (NWO) [050-060-810]
- Erasmus Medical Center and Erasmus University, Rotterdam
- Netherlands Organization for the Health Research and Development (ZonMw)
- Research Institute for Diseases in the Elderly (RIDE)
- Ministry of Education, Culture and Science
- Ministry for Health, Welfare and Sports
- European Commission (DG XII)
- Municipality of Rotterdam
In genome-wide association studies (GWAS) of complex traits, single SNP analysis is still the most applied approach. However, the identified SNPs have small effects and provide limited biological insight. A more appropriate approach to interpret GWAS data of complex traits is to analyze the combined effect of a SNP set grouped per pathway or gene region. We used this approach to study the joint effect on human longevity of genetic variation in two candidate pathways, the insulin/insulin-like growth factor (IGF-1) signaling (IIS) pathway and the telomere maintenance (TM) pathway. For the analyses, we used genotyped GWAS data of 403 unrelated nonagenarians from long-lived sibships collected in the Leiden Longevity Study and 1,670 younger population controls. We analyzed 1,021 SNPs in 68 IIS pathway genes and 88 SNPs in 13 TM pathway genes using four self-contained pathway tests (PLINK set-based test, Global test, GRASS and SNP ratio test). Although we observed small differences between the results of the different pathway tests, they showed consistent significant association of the IIS and TM pathway SNP sets with longevity. Analysis of gene SNP sets from these pathways indicates that the association of the IIS pathway is scattered over several genes (AKT1, AKT3, FOXO4, IGF2, INS, PIK3CA, SGK, SGK2, and YWHAG), while the association of the TM pathway seems to be mainly determined by one gene (POT1). In conclusion, this study shows that genetic variation in genes involved in the IIS and TM pathways is associated with human longevity.
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