Q192R polymorphism of paraoxonase 1 gene associated with insulin resistance in Mexican children Article uri icon


  • Background and Aims: The SNP rs662 in the paraoxonase 1 gene (PON1 Q192R) has been associated with obesity, dyslipidemia and cardiovascular risk. In this study, DNA samples of 117 children aged 6 to 12years from San Luis Potosí, México were genotyped for Q192R polymorphism of the PON1 gene. Methods: Genotypic frequencies were determined by allelic discrimination assay by real-time PCR using TaqMan fluorogenic probes. Anthropometry, lipid profile, glucose and insulin were analyzed by genotype. Results: The distribution of allele frequency in the population was Q=65 and R=35 following the Hardy Weinberg equilibrium (χ2=3.15, p=0.076). The Homeostasis Model Assessment for Insulin Resistance (HOMA-IR) index showed statistically significant differences among QQ/QR/RR genotypes (p=0.032). The odds ratio for the carriers of the RR genotype was associated with HOMA-IR corresponding to the 95th percentile or higher for Mexican children based on sex and age (OR=4.68; 95%25 confidence intervals, 1.23-17.8; p=0.016). When the absolute mean of HOMAR-IR was set as the cutoff, an increased odds was observed (OR=6.52; 95%25 confidence intervals, 1.68-25.3; p=0.008). Conclusions: According to our results, PON1 Q192R polymorphism is a risk marker for insulin resistance, a pathological factor involved in the development of metabolic syndrome. © 2015 IMSS.

publication date

  • 2015-01-01