Effect of interleukin-6 polymorphisms on human longevity: A systematic review andmeta-analysis

Domenico Lio, Giuseppina Candore, Sonya Vasto, Calogero Caruso, Mikko Hurme, Lene Christiansen, Claudio Franceschi, Danilo Di Bona, Cristiano Capurso, Luca Deiana, Maeve Rea, Eugenio Mocchegiani

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Several studies have assessed changes in frequency of -174 interleukin (IL)-6 single nucleotide polymorphism (SNP) with age. If IL-6 tracks with disability and age-related diseases, then there should be reduction, in the oldest old, of the frequency of homozygous GG subjects, who produce higher IL-6 levels. However, discordant results have been obtained. To explore the relationship between this polymorphism and longevity, we analyzed individual data on long-living subjects and controls from eight case-control studies conducted in Europeans, using meta-analysis. There was no significant difference in the IL-6 genotype between the oldest old and controls (Odds Ratio [OR]=0.96; 95% C.I.: 0.77-1.20; p=0.71), but there was significant between-study heterogeneity (I2=55.5%). In a subgroup analyses when male centenarians from the three Italian studies were included, the frequency of the IL-6 -174 GG genotype was significantly lower than the other genotypes (OR=0.49; 95% C.I.: 0.31-0.80; p=0.004), with no evidence of heterogeneity (I2=0%). Our data supports a negative association between the GG genotype of IL-6 SNP and longevity in Italian centenarians, with males who carry the genotype being two times less likely to reach extreme old age compared with subjects carrying CC or CG genotypes. These findings were not replicated in other European groups suggesting a possible interaction between genetics, sex and environment in reaching longevity.
Original languageEnglish
Pages (from-to)36-42
Number of pages7
JournalAgeing Research Reviews
Publication statusPublished - 2009


All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biochemistry
  • Ageing
  • Molecular Biology
  • Neurology

Cite this

Lio, D., Candore, G., Vasto, S., Caruso, C., Hurme, M., Christiansen, L., Franceschi, C., Di Bona, D., Capurso, C., Deiana, L., Rea, M., & Mocchegiani, E. (2009). Effect of interleukin-6 polymorphisms on human longevity: A systematic review andmeta-analysis. Ageing Research Reviews, 7, 36-42.