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PAI-1 haplogenotype confers genetic susceptibility for obesity and hypertriglyceridemia in Mexican children.

The presence of childhood obesity predisposes to the development of cardiovascular and metabolic diseases, such as coronary artery disease and type 2 diabetes mellitus, in adulthood. The polymorphisms described in PAI-1 gene have been linked with obesity and metabolic syndrome in several populations. The aim of this study was to investigate the association of the -844 G/A (rs2227631), -675 4G/5G (rs1799889) and HindIII C/G (rs757716)PAI-1 polymorphisms with obesity and dyslipidemia in a sample of Mexican children. A cross-sectional study was performed in 222 children with an age range between 6-11 years; 104 children were classified as obese and 118 children with normal-weight. The PAI-1 polymorphisms were analyzed by PCR-RFLP. Linkage disequilibrium (LD) and haplogenotype analysis among the three polymorphisms were determined. The results showed significant associations with obesity of the -844 G/A genotype and the A allele (OR= 2.75, p<0.001 and OR= 1.76, p=0.01, respectively). The -844 G/A polymorphism was found in LD with -675 4G/5G PAI-1 polymorphism (D’= 0.77). We found that G-4G-C/A-5G-G is a risk haplogenotype for obesity [OR=2.6; 95% confidence interval (CI) 1.17-4.22; p= 0.01] and with marginal association with hypertriglyceridemia(OR= 2.6; 95% CI 1.04-6.35; p= 0.05). The G-4G-C/A-5G-G PAI-1 haplogenotype may be a genetic marker of susceptibility for obesity and hypertriglyceridemia in Mexican children.