Abstract

BACKGROUND The G-308A single nucleotide polymorphism (SNP) in the promoter of tumor necrosis factor-alpha (TNF-α) gene has previously been reported to be associated with cardiovascular risk. However the potential association of this polymorphism with metabolic syndrome (MetS) is unclear. The aim of the current study was to explore the association of this TNF-α gene polymorphism with MetS in an Iranian population. METHODS/PATIENTS Two hundred and twenty two subjects were recruited and anthropometric and biochemical parameters were determined. Genotyping was performed using the amplification refractory mutation system polymerase chain reaction. The association of the genetic-polymorphism with MetS was evaluated by univariate and multivariate analyses. RESULTS MetS subjects had a significantly (P<0.05) higher level of fasted serum triglycerides, body-mass-index, waist-circumference, blood pressure and fasting-blood-glucose, and lower level of high-density lipoprotein cholesterol. The possession of AA or GA genotype of the TNF-α gene was not associated with MetS in our population. However the AA genotype of TNF-α was related to an increased level of triglyceride in MetS patients, compared to the control group. CONCLUSION TNF-α G-308A polymorphism is unlikely to play an important role in the development of MetS in our population.