Association between longevity and cytokine gene polymorphisms. A study in Sardinian centenarians

Area of Science:

• Genetics
• Immunology
• Longevity research

Background:

• Human longevity is associated with optimal immune system function.
• Cytokine gene polymorphisms regulating immune-inflammatory responses are potential genetic determinants of longevity.
• Previous studies suggested associations between specific cytokine gene polymorphisms (IL-6, IL-10, IFN-gamma) and longevity in Italian populations.

Purpose of the Study:

• To investigate the association between specific cytokine gene polymorphisms (IL-6, IL-10, IFN-gamma) and longevity in the Sardinian population.
• To determine if these genetic variations influence life expectancy in a population with a distinct genetic background.
• To explore the role of gene-environment interactions in cytokine-longevity associations.

Main Methods:

• Analysis of IL-6, IL-10, and IFN-gamma gene polymorphisms.
• Study population included 112 Sardinian centenarians and 137 Sardinian controls (60-year-olds).
• Data analyzed for the entire cohort and stratified by gender.

Main Results:

• No significant differences in the frequencies of IL-6, IL-10, and IFN-gamma polymorphisms were found between Sardinian centenarians and controls.
• Gender-specific analysis also revealed no significant associations.
• These findings contrast with previous observations in mainland Italian populations.

Conclusions:

• Cytokine gene polymorphisms, crucial for inflammatory response regulation, do not appear to influence life expectancy in the Sardinian population.
• The association between cytokine genes and longevity is population-specific, influenced by genetic background and gene-environment interactions.
• These genes may act as survival genes rather than direct longevity genes in this specific population.