ObjectiveThe FTO A/T polymorphism (rs9939609) is a strong candidate to influence obesity-related traits. Elite athletes from many different sporting disciplines are characterized by low body fat. Therefore, the aim of this study was to assess whether athletic status is associated with the FTO A/T polymorphism.Subjects and MethodsA large cohort of European Caucasians from Poland, Russia and Spain were tested to examine the association between FTO A/T polymorphism (rs9939609) and athletic status. A total of 551 athletes were divided by type of sport (endurance athletes, n = 266 vs. sprint/power athletes, n = 285) as well as by level of competition (elite-level vs. national-level). The control group consisted of 1,416 ethnically-matched, non-athletic participants, all Europeans. Multinomial logistic regression analyses were conducted to assess the association between FTO A/T genotypes and athletic status/competition level.ResultsThere were no significantly greater/lesser odds of harbouring any type of genotype when comparing across athletic status (endurance athletes, sprint/power athletes or control participants). These effects were observed after controlling for sex and nationality. Furthermore, no significantly greater/lesser odds ratios were observed for any of the genotypes in respect to the level of competition (elite-level vs. national-level).ConclusionThe FTO A/T polymorphism is not associated with elite athletic status in the largest group of elite athletes studied to date. Large collaborations and data sharing between researchers, as presented here, are strongly recommended to enhance the research in the field of exercise genomics.
Aim. To investigate the association of the first intron of FTO (fat mass and obesity associated) gene T/A (rs9939609) polymorphism and overweight in Russian population. Methods. 107 (females 48, males 59) overweight (body mass index 25.0-29.9 kg/m2) subjects or subjects with obesity (body mass index ≥30 kg/m2) were included. The control group (body mass index ≤24.9 kg/m2) consisted of 453 subjects (females 323, males 130). Genotyping for the T/A (rs9939609) polymorphism of the FTO gene was performed by polymerase chain reaction (PCR) and restriction enzyme digestion. Results. The frequency of the FTO A allele in subjects with overweight or obesity was significantly higher compared to controls (45.3% vs. 33.4%; p=0.0015). The genotype distribution of the FTO gene T/A polymorphism (TT - 32.7%, TA - 43.9%, AA - 23.4%) in a group of subjects with overweight or obesity was significantly different compared with controls (TT - 44.6%, TA - 43.9%, AA - 11.5%; p=0.0028). The relative risk of being overweight or obese was 2.4 for subjects with the FTO AA genotype. Conclusions. The results of the presented study suggest an association of the FTO gene T/A polymorphism with the risk of obesity, which is consistent with the data of numerous studies.
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