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Peroxisome proliferator-activated receptor gamma coactivator 1α variation: a closer look at obesity onset age and its related metabolic status and body composition

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There is a lack of knowledge regarding the effect of polymorphisms of the peroxisome proliferator-activated receptor gamma coactivator 1α (PGC-1α) gene on the age of obesity onset. Hence, 3 polymorphisms of the PGC-1α gene (PGC-1α rs17574213, rs8192678, and rs3755863) were examined in association with obesity onset age. Also, obesity onset age-related metabolic status and body composition were evaluated. This cross-sectional study was conducted with a total of 321 obese participants. Anthropometric and biochemical information, body composition, and PGC-1α gene sequences were analyzed. The rs17574213 polymorphism was associated with obesity onset in children aged <1 years and 10–18 years. The rs8192678 polymorphism was associated with obesity onset in adulthood. Body mass index, body fat percent, and trunk fat were higher in groups whose obesity began at age <1 year or 10–18 years than in other groups. Serum levels of high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and total cholesterol were lowest in the group with obesity onset between the ages of 10 and 18 years. Visceral fat and fasting blood glucose were highest in those whose obesity began in adulthood. In conclusion, 2 polymorphisms of the PGC-1α gene were associated with obesity onset age.
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Keywords: PGC-1α variation; biochemical factors; body composition; composition corporelle; facteurs biochimiques; obesity; obésité; variation du PGC-1α

Document Type: Research Article

Affiliations: 1: Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran. 2: Osteoporosis Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran. 3: Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.

Publication date: January 1, 2018

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