To cite this article: Paffen E, Medina P, de Visser MCH, van Wijngaarden A, Zorio E, Estellé s A, Rosendaal FR, Españ a F, Bertina RM, Doggen CJM.The )589C>T polymorphism in the interleukin-4 gene (IL-4) is associated with a reduced risk of myocardial infarction in young individuals. J Thromb Haemost 2008; 6: 1633-8.Summary. Background: Inflammatory reactions contribute to the development of arterial disease. We investigated the role of interleukin-4 (IL-4) in the development of myocardial infarction (MI) by genotyping patients with MI and control subjects for the )589C>T (rs2243250) single nucleotide polymorphism (SNP), which tags a functional haplotype of IL-4. Methods and results: Study of Myocardial Infarctions Leiden (SMILE) included 560 men with a first MI and 646 control subjects. The Valencia study included 305 patients with MI at £52 years (men and women) and 310 control subjects. In SMILE no clear overall association with the )589C>T genotype was found [odds ratio (OR) 0.84; 95% CI 0.37-1.95 for )589TT and 0.82; 95% CI 0.62-1.07 for )589CT compared with )589CC]. In patients younger than 50 years, carriership of one or two )589T alleles was associated with a reduced risk of MI (OR 0.57: 95% CI 0.34-0.95). This result was replicated in the Valencia study, where carriers of one or two )589T alleles had a reduced risk of MI , with a strong protective effect of the )598T allele in homozygous )589T (OR 0.33: 95% CI 0.10-1.05). In the control subjects of the Valencia study, the )589T allele was associated with reduced levels of F1+2. Conclusion: Our data indicate that the IL-4 haplotype tagged by the )589T allele reduces the risk of MI in young individuals.

No abstract