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Updated: Jul 2, 2026
07:25
Lipid Supplementation for Longevity and Gene Transcriptional Analysis in Caenorhabditis elegans
Published on: December 9, 2022
FOXO3A genotype is strongly associated with human longevity.
Bradley J Willcox1, Timothy A Donlon, Qimei He
1Pacific Health Research Institute, 846 South Hotel Street, Honolulu, HI 96813, USA. bjwillcox@phrihawaii.org
Summary
Genetic variation in the FOXO3A gene is strongly linked to human longevity in men. This finding, associated with healthier aging phenotypes and improved insulin sensitivity, warrants further investigation in diverse populations.
Area of Science:
- Genetics and Aging Research
- Human Longevity Studies
Background:
- Human longevity is a complex trait with a familial component, but its genetic basis remains largely unknown.
- The insulin/IGF-1 signaling (IIS) pathway is a conserved biological pathway influencing aging and longevity in animal models, but human data are limited.
- Previous human studies faced challenges including small sample sizes and imprecise phenotyping.
Purpose of the Study:
- To investigate the genetic contributions to human longevity from genes within the IIS pathway.
- To assess the association between candidate longevity genes and aging phenotypes in a well-characterized, long-lived male population.
Main Methods:
- Conducted a nested case-control study on 5 candidate longevity genes within a large, homogeneous population of long-lived men.
- Detailed phenotyping of aging characteristics, including health status, physical and cognitive function, and disease prevalence.
- Genomic analysis focused on genetic variation within candidate genes, specifically FOXO3A.
Main Results:
- Genetic variation in the FOXO3A gene showed a strong association with human longevity (OR=2.75, P=0.00009).
- Long-lived men exhibited healthier aging phenotypes: lower cancer and cardiovascular disease rates, better self-reported health, and higher physical/cognitive function.
- These aging phenotypes and markers of insulin sensitivity were associated with FOXO3A genotype, particularly homozygosity for the GG genotype.
Conclusions:
- FOXO3A is a significant genetic determinant of human longevity in men.
- The FOXO3A genotype is linked to multiple healthy aging phenotypes and improved insulin sensitivity.
- Further research on FOXO3A, longevity, and aging phenotypes in other populations is recommended.
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