EFFECT OF THE Pro12Ala POLYMORPHISM OF THE PEROXISOME PROLIFERATOR-ACTIVATED RECEPTOR γ2 GENE ON LIPID PROFILE AND ADIPOKINES LEVELS IN OBESE SUBJECTS
Becer E1,2,*, Çırakoğlu A3
*Corresponding Author: Eda Becer, Ph.D., M.Sc., Department of Biochemistry, Faculty of Pharmacy, Near East University, Nicosia, Mersin 10, Turkey. Tel: +90-392-680-2000, Ext: 128. Fax:+90-392-680-2038. E-mail: edabecer@yahoo.com
page: 71
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Abstract

Peroxisome proliferator-activated receptor γ (PPARγ) is a key regulator of metabolism, adipokines production and secretion. The aim of this study was to investigate the association between the PPARγ2 gene Pro12Ala polymorphism in obesity in terms of body mass index (BMI), lipid parameters, homeostasis model assessment of insulin resistance (HOMA-IR), serum lipid, leptin, adiponectin, resistin and chemerin levels. The study included 160 obese and 140 non obese subjects. The Pro12Ala polymorphism was determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Serum lipid, leptin, adiponectin, resistin and chemerin levels were measured. No association was found between the Pro12Ala polymorphism and BMI. Strikingly, in the study group, obese subjects with the AA genotype had significantly higher triglycerides (p = 0.046) and resistin (p <0.001) levels than those with the wild-type PP and heterozygous PA genotypes. Serum leptin and chemerin levels were significantly associated with Pro12Ala poymorphism in the obese and non obese groups (p <0.01). In the obese group, subjects with the homozygous AA genotype had significantly lower adiponectin (p = 0.010) activity than the PP genotype. Our results suggest that the PPARγ2 gene Pro12Ala polymorphism has no direct association with obesity but does have significant influences on lipid profiles and adipokines levels.



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