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Haematologica, Vol 88, Issue 1, 54-60
Copyright © 2003 by Ferrata Storti Foundation

Journal Article

Interleukin-1 gene cluster polymorphisms and risk of coronary artery disease

B Vohnout, A Di Castelnuovo, R Trotta, A D'Orazi, G Panniteri, A Montali, MB Donati, M Arca, and L Iacoviello

Angela Valenti Laboratory of Genetic and Environmental Risk Factors for Thrombotic Disease, Consorzio Mario Negri Sud, via Nazionale 1, 66030 Santa Maria Imbaro, Italy.

BACKGROUND AND OBJECTIVES: The pro-inflammatory cytokine interleukin (IL)-1 has been suggested to play a role in atherosclerosis. Several genetic polymorphisms have been described in the genes of the IL-1 cluster and associations with coronary artery disease (CAD) have been reported, although with contrasting results. DESIGN AND METHODS: The associations of a variable number tandem repeat (86 bp) polymorphism in intron 2 of interleukin-1 receptor antagonist (IL1-RA) and of the 511 C/T polymorphism of IL-1b with the risk of CAD were studied. Three hundred and thirty-five case (CAD+) patients with angiographically documented CAD (stenosis >50% in at least one major coronary artery) were compared with 205 unrelated individuals free of CAD signs at angiogram (CAD- controls). One hundred and two (30.5%) CAD+ patients had single-vessel disease (SVD) and 233 (69.5%) multiple-vessel disease (MVD). RESULTS: There was no statistically significant difference in either genotype distribution or allele frequency of both IL-1 RA and IL-1b 511 C/T polymorphisms between CAD+ cases and CAD- controls. Moreover in multivariate analysis, adjusting for multiple comparisons and confounding factors, no difference was found in IL-1 RA genotype distribution between patients with SVD or MVD. INTERPRETATION AND CONCLUSIONS: Our study does not support the association between IL-1 RA intron 2 VNTR and IL-1b 511 C/T polymorphisms and the risk of CAD in individuals undergoing coronary angiography.


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