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The FTO rs9939609 polymorphism and obesity risk in teens: Evidence-based meta-analysis
Tainara Emilia Rodrigues da Silva1, Nayara Lopes Andrade1, Daiane de Oliveira Cunha2
1Escola de Ciências Médicas, Biomédicas e Farmacêuticas, Departamento de Medicina, Pontifícia Universidade Católica de Goiás, Goiânia, Goiás, Brazil.
Objective:
This meta-analysis aims evaluate the association of the polymorphism rs9939609 of FTO with the risk of obesity among children and adolescents, based on the assessment of four genetic models: codominant, dominant, recessive alleles model.
Methods:
Case-control studies, published between the years 2011-2015, were selected from tree available databases (PubMed, Scopus and Web of Science) and were analysed using Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) recommendations. Thirteen studies were included totalling 15,613 participants, divided into 7311 cases and 8302 controls.
Results:
The FTO rs9939609 polymorphism was significantly associated with increased risk of obesity in children and adolescents for homozygous genotypes AA and heterozygous AT (TT vs. AT+AA: OR=0.723, 95% CI 0.629 to 0.832; p<0.0001).
Conclusion:
This meta-analysis shows that the FTO rs9939609 polymorphism in the gene is a risk factor for obesity in children and adolescents with the presence of the A allele, both homozygous genotype AA situation, as heterozygous AT.
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