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TGFBR1 tagging SNPs and gastric cancer susceptibility: a two-stage case-control study in Chinese population

Jianjian Chen1, Lin Miao, Guangfu Jin

  • 1Institute of Digestive Endoscopy and Medical Center for Digestive Diseases, Second Affiliated Hospital of Nanjing Medical University, Nanjing, China; Department of Health Promotion, Wuxi Center for Disease Prevention and Control, Wuxi, China.

Molecular Carcinogenesis
|August 23, 2012
PubMed

Insights

Genetic variants in the transforming growth factor-beta receptor type I (TGFBR1) gene are associated with an increased risk of gastric cancer. Specific single nucleotide polymorphisms (SNPs) in TGFBR1 may influence gastric cancer development in the Han-Chinese population.

Area of Science:

  • Genetics
  • Oncology
  • Molecular Biology

Background:

  • Transforming growth factor-beta (TGF-β) is a key regulator of cell growth, differentiation, and apoptosis.
  • Dysregulation of TGF-β signaling is frequently observed in various cancers, including gastric cancer.
  • TGF-β receptor type I (TGFβR1) plays a critical role in mediating TGF-β signaling and may influence cancer risk.

Purpose of the Study:

  • To investigate the potential association between genetic variants in the TGFBR1 gene and the risk of developing gastric cancer.
  • To identify specific single nucleotide polymorphisms (SNPs) within TGFBR1 that may confer susceptibility to gastric cancer.

Main Methods:

  • A two-stage case-control study was conducted, involving a total of 1134 gastric cancer cases and 1031 controls.
  • Five tagging single nucleotide polymorphisms (SNPs) in the TGFBR1 gene were genotyped to represent common variants.
  • Statistical analyses, including dominant and additive models, were used to assess the association between TGFBR1 SNPs and gastric cancer risk.

Main Results:

  • Two SNPs, rs6478974 and rs10512263, showed a potential association with gastric cancer risk in the initial stage.
  • These associations were confirmed in the second stage, with similar effect sizes.
  • Combined analysis revealed that specific genotypes of rs6478974 and rs10512263 were significantly associated with an increased risk of gastric cancer (e.g., adjusted OR = 1.36 for rs6478974 in a dominant model).

Conclusions:

  • Polymorphisms in the TGFBR1 gene are implicated in the development of gastric cancer.
  • The identified TGFBR1 variants may serve as potential genetic modifiers of gastric cancer risk.
  • Further research is warranted to elucidate the functional mechanisms underlying these associations in the Han-Chinese population.
Keywords:
TGFBR1gastric cancersusceptibilitytagging SNP

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