Body adiposity but not insulin resistance is associated with -675 4G/5G polymorphism in the PAI-1 gene in a sample of Mexican children

de la Cruz-Mosso, Ulises; Muñoz-Valle, José Francisco; Salgado-Bernabé, Aralia Berenice; Castro-Alarcón, Natividad; Salgado-Goytia, Lorenzo; Sánchez-Corona, José; Flores-Martínez, Silvia Esperanza; Parra-Rojas, Isela

doi:10.1016/j.jpedp.2013.01.005

Informação do artigo

Abstract

Objective

To assess whether the -675 4G/5G polymorphism in the plasminogen activator inhibitor-1 gene is associated with obesity and insulin resistance in Mexican children.

Methods

A cross-sectional study was performed in 174 children, 89 with normal-weight and 85 with obesity, aged from 6 to 13 years. All children were from state of Guerrero, and recruited from three primary schools in the city of Chilpancingo, Mexico. Insulin levels were determined by immunoenzymatic assay. The homeostasis model assessment was used to determine insulin resistance. The -675 4G/5G polymorphism in PAI-1 gene was analyzed by polymerase chain reaction-restriction fragment length polymorphism.

Results

The prevalence of insulin resistance in the obese group was higher (49.41%) than in the normal-weight group (16.85%). The 4G/5G PAI-1 polymorphism was found in Hardy Weinberg equilibrium. The 4G/5G genotype contributed to a significant increase in waist-hip ratio (b = 0.02, p = 0.006), waist circumference (b = 4.42, p = 0.009), and subscapular skinfold thickness (b = 1.79, p = 0.04); however, it was not related with insulin resistance.

Conclusion

The -675 4G/5G genotype of PAI-1 gene was associated with increase of body adiposity in Mexican children.

Keywords:

PAI-1 gene

Polymorphisms

Body adiposity

Insulin resistance

Resumo

Objetivo

Elaboramos este estudo para avaliar se o polimorfismo -675 4G/5G no gene inibidor 1 do ativador do plasminogênio se associa à obesidade e à resistência insulínica em crianças mexicanas.

Métodos

Foi realizado um estudo transversal em 174 crianças, 89 delas com peso nor- mal e 85 obesas, variando sua idade de 6 a 13 anos. Todas as crianças eram do estado de Guerrero e foram recrutadas de três escolas primárias na cidade de Chilpancingo, México. Os níveis de insulina foram determinados por prova imunoenzimática. Foi usado o modelo de avaliação da homeostase para determinar resistência insulínica. O poli- morfismo -675 4G/5G no gene PAI-1 foi analisado pelo método reação de polimerase em cadeia-polimorfismo no comprimento dos fragmentos de restrição.

Resultados

A prevalência de resistência insulínica no grupo obeso foi mais alta (49,41%) do que no grupo com peso normal (16,85%). O polimorfismo 4G/5G do PAI-1 foi encon- trado em equilíbrio de Hardy Weinberg. O genótipo 4G/5G contribuiu para um aumento significativo da relação cintura-quadril (b = 0,02, p = 0,006), da circunferência da cintura (b = 4,42, p = 0,009) e da espessura da prega subescapular (b = 1,79, p = 0,04), mas não se relacionou com a resistência insulínica.

Conclusão

O genótipo -675 4G/5G do gene PAI-1 se associou a aumento da adiposidade corporal em crianças mexicanas.

Palavras-chave:

Gene PAI-1

Polimorfismos

Adiposidade corporal

Resistência insulínica

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☆

Como citar este artigo: de la Cruz-Mosso U, Muñoz-Valle JF, Salgado-Bernabé AB, Castro-Alarcón N, Salgado-Goytia L, Sánchez-Corona J, et al. Body adiposity but not insulin resistance is associated with -675 4G/5G polymorphism in the PAI-1 gene in a sample of Mexican children. J Pediatr (Rio J). 2013;89:492-8.

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