Atieh Mirzababaei - Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran
Mehdi Mollahosseini - Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran
Mohammad Hossein Rahimi - Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran
Mir Saeed Yekaninejad - Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences (TUMS), Tehran, Iran.

Background and Aim: This study examined the interactions between rs1333048 genotypes on 9p21 genetic region and Total antioxidant capacity (TAC) on odds of MetS.Methods: 263 Tehrani adults were enrolled in this cross-sectional study. The MetS was defined according to the ATPIII. Dietary intake was assessed daily using a FFQ with 147 items. Dietary TAC was assessed according to United States Department of Agriculture (USDA) Database for oxygen radical absorbance capacity (ORAC). Bioelectrical impedance analysis (BIA) method was used for body analysis and rs1333048 were genotyped by restriction fragment length polymorphism method (PCR-RFLP). Participants were categorized into three groups based on rs1333048 genotypes .Results: After adjustment for confunder variable, this study demonstrated an interaction between AA genotype and high Lyophilic oxygen radical absorbance capacity (L-ORAC) and high Hydrophilic oxygen radical absorbance capacity (H-ORAC) intake on low odds of MetS(OR=0.24,95%CI=0.06-0.94,P for interaction=0.04,OR=0.26,95%CI=0.06-0.99,P for interaction=0.04).Morover, our result indicated, there was no interaction between AA genotype and high total oxygen radical absorbance capacity (T-ORAC) and Total phenolic (TP) intakes on reduce odds of MetS (OR=0.07,95%CI=0.07-1.10,P for interaction=0.07,OR=0.58,95%CI=0.16-2.07,P for interaction=0.40) respectively. Conclusion: The results of the present study indicate that high L-ORAC and high H-ORAC intake may modify the elevated odds of MetS in AA genotype of rs1333048 on the 9p21 genetic locus.

CDKN2B; Oxygen Radical Absorbance Capacity; Antioxidants; Metabolic syndrome; Cardio-vascular diseases, Nutrigenomics