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The role of obesity-associated loci identified in genome-wide association studies in the determination of pediatric BMI. | LitMetric

AI Article Synopsis

  • The prevalence of obesity among children and adults in the U.S. has risen significantly over the past ten years, with both environmental and genetic factors playing a role.
  • A study examined 25 specific genetic variants (SNPs) associated with BMI in a group of 6,078 children, finding 15 SNPs linked to nine different genetic loci.
  • The findings suggest that at least nine genetic loci known to affect adult BMI also influence childhood BMI, indicating a genetic component to childhood obesity.

Article Abstract

The prevalence of obesity in children and adults in the United States has increased dramatically over the past decade. Besides environmental factors, genetic factors are known to play an important role in the pathogenesis of obesity. A number of genetic determinants of adult BMI have already been established through genome-wide association (GWA) studies. In this study, we examined 25 single-nucleotide polymorphisms (SNPs) corresponding to 13 previously reported genomic loci in 6,078 children with measures of BMI. Fifteen of these SNPs yielded at least nominally significant association to BMI, representing nine different loci including INSIG2, FTO, MC4R, TMEM18, GNPDA2, NEGR1, BDNF, KCTD15, and 1q25. Other loci revealed no evidence for association, namely at MTCH2, SH2B1, 12q13, and 3q27. For the 15 associated variants, the genotype score explained 1.12% of the total variation for BMI z-score. We conclude that among 13 loci that have been reported to associate with adult BMI, at least nine also contribute to the determination of BMI in childhood as demonstrated by their associations in our pediatric cohort.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2860782PMC
http://dx.doi.org/10.1038/oby.2009.159DOI Listing

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