title: Correlation of transforming growth factor beta-1 gene polymorphisms C-509T and T869C and the risk of gastric cancer in China.
abstract: OBJECTIVE
  As an important cytokine that modulate the cell cycle, the involvement of transforming growth factor beta-1 (TGF-beta1) in carcinogenesis has been extensively studied for many years. Literatures have demonstrated that TGF-beta1 gene polymorphisms may alter the risk of various cancers, such as lung, prostate and breast. To investigate whether polymorphisms of the TGF-beta1 gene can modify the risk of gastric cancer, we conduct this hospital-based, case-control study.
  
  
  METHODS
  One hundred and sixty-seven cases and 193 gender, age-matched healthy controls were enrolled in this case-control study. TGF-beta1 polymorphisms C-509T and T + 869C were identified by PCR-RFLP and ARMS-PCR protocols, respectively.
  
  
  RESULTS
  Significantly different distributions of both genes were demonstrated between the case and control. Variant genotypes -509CT, -509TT, +869TC and +869CC were associated with increased risk of gastric cancer (P = 0.001, OR = 2.54; P = 0.016, OR = 2.09; P < 0.001, OR = 3.46; P < 0.001, OR = 4.04, respectively). With haplotype analysis, wild type CT (-509C and +869T) led to a lower frequency in case than that in control (P < 0.001), while haplotype TC was more frequent in case than in control (P < 0.001). Multiple logistic regression analysis revealed that individuals with haplotype TC had an increased likelihood of developing gastric cancer (OR = 3.19, 95%CI = 1.72-5.90).
  
  
  CONCLUSIONS
  Our findings imply that -509C > T and +869T > C gene polymorphisms in TGF-beta1 may be a critical risk factor of genetic susceptibility to gastric cancer in the Chinese population.
authors.affiliation: Medical College, Shandong University, Jinan, Shandong Province, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Bang-Wei
authors.initials: BW
authors.lastname: Cao
authors.forename: Yue
authors.initials: Y
authors.lastname: Dai
authors.forename: Hong
authors.initials: H
authors.lastname: Cui
authors.forename: Hong-Li
authors.initials: HL
authors.lastname: Yang
authors.forename: Chang-Qing
authors.initials: CQ
authors.lastname: Xu
mesh_terms: D016022:Case-Control Studies; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000235:genetics*; D053773:Transforming Growth Factor beta1 / Q000235:genetics*
chemical_list: D053773:Transforming Growth Factor beta1