alexa MCT1 A1470T: a novel polymorphism for sprint performance?

Journal of Nutrition Research

Author(s): Sawczuk M, Banting LK, Ciszczyk P, MaciejewskaKarowska A, Zarbska A,

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Abstract OBJECTIVES: The A1470T polymorphism (rs1049434) in the monocarboxylate (lactate/pyruvate) transporter 1 gene (MCT1) has been suggested to influence athletic performance in the general population. We compared genotype distributions and allele frequencies of the MCT1 gene A1470T polymorphism between endurance athletes, sprint/power athletes and matched controls. We also examined the association between the MCT1 A1470T and the athletes' competition level ('elite' and 'national' level). DESIGN: The study involved endurance athletes (n=112), sprint/power athletes (n=100), and unrelated sedentary controls (n=621), all Caucasians. METHODS: Genomic DNA was extracted from buccal epithelium using a standard protocol. We conducted Fisher's exact tests and multinomial logistic regression analyses to assess the association between MCT1 genotype and athletic status/competition level. RESULTS: Sprint/power athletes were more likely than controls to possess the minor T allele (TT genotype compared to the AA [p<0.001]; TT or AT compared to the AA [p=0.007]; TT compared to both AA and AT genotypes [p<0.001]). Likewise, sprint/power athletes were more likely than endurance athletes to have the TT genotype compared to the AA (p=0.029) and the TT compared to both AA and AT genotypes (p=0.027). Furthermore, elite sprint/power athletes were more likely than national-level athletes to have the TT genotype compared to the AA (p=0.044), and more likely to have the TT genotype compared to both AA and AT genotypes (recessive model) (p=0.045). CONCLUSIONS: The MCT1 TT genotype is associated with elite sprint/power athletic status. Future studies are encouraged to replicate these findings in other elite athlete cohorts. Copyright © 2013 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved. This article was published in J Sci Med Sport and referenced in Journal of Nutrition Research

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