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Lack of an Association between Peroxisome Proliferator-Activated Receptor- Gene Pro12Ala Polymorphism and Adiponectin Levels in the Polycystic Ovary Syndrome

Department of Molecular and Clinical Endocrinology and Oncology (F.O., T.C., A.C., G.L.), University "Federico II," 80131 Naples, Italy; Chair of Obstetrics and Gynecology (S.P., T.R., F.Z.), University of Catanzaro "Magna Graecia," 88100 Catanza, Italy; MeriGen Laboratory of Molecular Biology (S.D.B., D.L.), 80131 Naples, Italy; and Internal Medicine, Department of Medical and Surgical Sciences (R.V.), University of Padova, 35128 Padova, Italy

Address all correspondence and requests for reprints to: Francesco Orio, M.D., Department of Molecular and Clinical Endocrinology and Oncology, University "Federico II" of Naples, Via G. Santoro n.14-84100 Salerno, Italy. E-mail: francescoorio{at}virgilio.it.

Polycystic ovary syndrome (PCOS) is one of the most common endocrine metabolic diseases and is characterized by obesity in approximately 50% of those affected. Adiponectin is an adipocyte-derived protein that possesses an antiatherosclerotic action and improves insulin sensitivity. Peroxisome proliferator-activated receptor- (PPAR-) regulates the transcription of several adipocyte-specific genes. The aim of this study was to investigate the putative influence of the PPAR- gene Pro12Ala polymorphism on the adiponectin levels in PCOS and healthy women.

One hundred twenty women with PCOS and 120 healthy women whose ages and body mass indexes matched those of the PCOS patients were investigated. The genetic analysis of PPAR- gene Pro12Ala polymorphism was performed by restriction fragment of polymorphisms. Serum adiponectin levels were evaluated, and the homeostasis model assessment score was also calculated. No subject was homozygous for the Ala12 allele of the PPAR- gene. No significant differences in body mass index, plasma glucose and lipid levels, and homeostasis model assessment scores were observed between and within genotype groups in PCOS and control women. No significant differences in serum adiponectin concentrations were observed between and within genotype groups in PCOS and control women.

In conclusion, our results confirm that adiponectin concentrations are similar in PCOS and controls and demonstrate no effect of the PPAR- gene Pro12Ala polymorphism on serum adiponectin levels.

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