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Genetic susceptibility, birth weight and obesity risk in young Chinese

J Hong1, J Shi, L Qi

  • 1Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Institute of Endocrinology and Metabolism, Endocrine and Metabolic E-Institutes of Shanghai Universities (EISU) and Key Laboratory for Endocrinology and Metabolism of Chinese Health Ministry, Rui-jin Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai, China.

International Journal of Obesity (2005)
|June 20, 2012
PubMed

Insights

Birth weight influences genetic susceptibility to obesity in young Chinese adults. Normal birth weight amplifies the impact of genetic risk factors on obesity development.

Area of Science:

  • Genetics
  • Obesity Research
  • Public Health

Background:

  • Birth weight is a marker of prenatal development and linked to adult obesity.
  • Genetic factors play a role in obesity risk.
  • Understanding gene-environment interactions is crucial for obesity prevention.

Purpose of the Study:

  • To investigate if birth weight modifies the association between genetic susceptibility and obesity risk in young Chinese individuals.
  • To identify specific genetic variants associated with obesity in this population.

Main Methods:

  • Recruited 540 obese and 500 normal-weight young Chinese individuals (14-30 years).
  • Genotyped 23 single-nucleotide polymorphisms (SNPs) associated with Body Mass Index (BMI) from Caucasian GWAS.
  • Calculated genetic risk scores (GRS) and analyzed interactions with birth weight.

Main Results:

  • Six loci (SEC16B, GNPDA2, BDNF, FTO, MC4R, TMEM160) were significantly associated with obesity.
  • Genetic risk scores improved obesity prediction.
  • A significant interaction between genetic risk scores and birth weight was observed (Pinteraction<0.001).
  • Genetic effects on obesity were strongest in individuals with normal birth weight.

Conclusions:

  • Confirmed associations of specific SNPs with obesity in young Chinese.
  • Birth weight significantly modifies genetic susceptibility to obesity.
  • Highlights the importance of considering birth weight in genetic obesity risk assessments.
Abstract

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