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Adjustment for smoking does not alter the FOXO3A association with longevity
Carolin Däumer1, Friederike Flachsbart, Amke Caliebe
1Institute of Medical Informatics and Statistics, Christian-Albrechts University, Brunswiker Straße 10, 24105, Kiel, Germany.
Age (Dordrecht, Netherlands)
|September 10, 2013
Summary
Genetic variations in the FOXO3A gene are linked to human longevity. This study found that smoking does not significantly alter this association, suggesting it
Area of Science:
- Genetics
- Gerontology
- Molecular Biology
Background:
- Human longevity is a complex trait influenced by genetics and environment.
- FOXO3A gene variation is a confirmed genetic factor in longevity, but its role is not fully understood.
- FOXO3A is implicated in cancer, and its association with longevity might be confounded by smoking-related cancers.
Purpose of the Study:
- To investigate whether smoking modifies the association between FOXO3A gene variation and human longevity.
- To explore the role of FOXO3A in longevity independent of smoking-related confounding factors.
Main Methods:
- A case-control study was conducted in two independent populations: German (1,613 centenarians/nonagenarians and 1,104 controls) and Danish (1,088 nonagenarians and 736 controls).
- Genotyping of single nucleotide polymorphisms (SNPs) in the FOXO3A gene region was performed.
- Logistic regression analysis was used to assess the association between FOXO3A SNPs and longevity, adjusting for smoking status.
Main Results:
- Adjustment for smoking did not systematically change the association between FOXO3A variation and longevity in either the German or Danish population.
- The identified association between FOXO3A and longevity appears robust and not primarily driven by confounding effects of smoking or lung cancer.
Conclusions:
- The association between FOXO3A gene variation and human longevity is likely independent of smoking.
- This finding strengthens the role of FOXO3A as a significant genetic determinant of exceptional lifespan.
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