AIM: Genome-wide association studies have shown that variation in the FTO gene predisposes to obesity and related traits that are common features of polycystic ovary syndrome (PCOS). The aim of the present study was to assess the effect of FTO variation on obesity, insulin sensitivity, and metabolic and hormonal profiles in PCOS. METHODS: We examined 136 PCOS women (mean body mass index [BMI]: 28.28+/-6.95kg/m(2), mean age: 25.36+/-5.48 years). Anthropometric measurement, euglycaemic-hyperinsulinaemic clamp and oral glucose tolerance tests and sex hormone assessments were performed. The study group was genotyped for the FTO rs9939609 polymorphism. RESULTS: BMI (29.0+/-6.9kg/m(2) vs 26.1+/-6.8kg/m(2); P=0.023), body weight (80.1+/-20.7kg vs 72.6+/-20.2kg; P=0.048), fat mass (29.7+/-1 6.6kg vs 24.6+/-17.7kg; P=0.045) and waist circumference (89.8+/-16.7cm vs 83.2+/-17.1cm; P=0.028) were higher in carriers of at least one copy of the A allele. Differences in these parameters were more significant when comparing AA and TT homozygotes. Women with the AA genotype also had decreased insulin sensitivity (P=0.025) and follicle-stimulating hormone (P=0.036). In logistic-regression analyses, the association of the FTO gene polymorphism with insulin sensitivity was no longer significant when BMI was included in the model. CONCLUSION: Variation in the FTO gene modifies weight, adiposity and other measures of obesity and insulin sensitivity in PCOS. The examined FTO gene variant appears to have a greater impact on obesity and related traits in PCOS than in other phenotypes. The effect on insulin sensitivity appears to be secondary to its influence on obesity and body fat.
AIM: Genome-wide association studies have shown that variation in the FTO gene predisposes to obesity and related traits that are common features of polycystic ovary syndrome (PCOS). The aim of the present study was to assess the effect of FTO variation on obesity, insulin sensitivity, and metabolic and hormonal profiles in PCOS. METHODS: We examined 136 PCOSwomen (mean body mass index [BMI]: 28.28+/-6.95kg/m(2), mean age: 25.36+/-5.48 years). Anthropometric measurement, euglycaemic-hyperinsulinaemic clamp and oral glucose tolerance tests and sex hormone assessments were performed. The study group was genotyped for the FTOrs9939609 polymorphism. RESULTS: BMI (29.0+/-6.9kg/m(2) vs 26.1+/-6.8kg/m(2); P=0.023), body weight (80.1+/-20.7kg vs 72.6+/-20.2kg; P=0.048), fat mass (29.7+/-1 6.6kg vs 24.6+/-17.7kg; P=0.045) and waist circumference (89.8+/-16.7cm vs 83.2+/-17.1cm; P=0.028) were higher in carriers of at least one copy of the A allele. Differences in these parameters were more significant when comparing AA and TT homozygotes. Women with the AA genotype also had decreased insulin sensitivity (P=0.025) and follicle-stimulating hormone (P=0.036). In logistic-regression analyses, the association of the FTO gene polymorphism with insulin sensitivity was no longer significant when BMI was included in the model. CONCLUSION: Variation in the FTO gene modifies weight, adiposity and other measures of obesity and insulin sensitivity in PCOS. The examined FTO gene variant appears to have a greater impact on obesity and related traits in PCOS than in other phenotypes. The effect on insulin sensitivity appears to be secondary to its influence on obesity and body fat.
Authors: P Chedraui; F R Pérez-López; G S Escobar; J A Espinoza-Caicedo; M Montt-Guevara; A R Genazzani; T Simoncini Journal: J Endocrinol Invest Date: 2016-02-22 Impact factor: 4.256
Authors: Michelle R Jones; Angela K Chua; Emebet A Mengesha; Kent D Taylor; Yii-Der I Chen; Xiaohui Li; Ronald M Krauss; Jerome I Rotter; Richard S Legro; Ricardo Azziz; Mark O Goodarzi Journal: Steroids Date: 2011-12-08 Impact factor: 2.668
Authors: P Wojciechowski; A Lipowska; P Rys; K G Ewens; S Franks; S Tan; E Lerchbaum; J Vcelak; R Attaoua; M Straczkowski; R Azziz; T M Barber; A Hinney; B Obermayer-Pietsch; P Lukasova; B Bendlova; F Grigorescu; I Kowalska; M O Goodarzi; J F Strauss; M I McCarthy; M T Malecki Journal: Diabetologia Date: 2012-07-18 Impact factor: 10.122
Authors: Susanne Tan; André Scherag; Onno Eilard Janssen; Susanne Hahn; Harald Lahner; Tiina Dietz; Susann Scherag; Harald Grallert; Carla Ivane Ganz Vogel; Rainer Kimmig; Thomas Illig; Klaus Mann; Johannes Hebebrand; Anke Hinney Journal: BMC Med Genet Date: 2010-01-21 Impact factor: 2.103