title: Association of polymorphisms in transforming growth factor-β receptors with susceptibility to gastric cardia adenocarcinoma.
abstract: Both transforming growth factor-β receptor I (TGFBR1) and receptor II (TGFBR2) are serine/threonine kinases and play important roles in TGF-β/Smads signal pathway. The case-control study was performed to evaluate the possible association of Int7G24A and *6A polymorphisms of TGFBR1 and G-875A polymorphism of TGFBR2 with susceptibility to gastric cardia adenocarcinoma (GCA) in a population of North China. Polymerase-chain reaction (PCR)-restriction fragment length polymorphism (RFLP) and PCR methods were used respectively to detect the genotype of Int7G24A, *6A and G-875A in 468 GCA and 584 healthy controls. Immunohistochemistry method was used to determine the protein expression of TGFBR1 and TGFBR2. Family history of upper gastrointestinal cancer (UGIC) significantly increased the risk of developing GCA. There were no differences in the genotype distribution of TGFBR1 *6A polymorphism among cases and controls. However, A allele of Int7G24A significantly elevated the risk of developing GCA (adjusted OR = 1.34, 95% CI 1.03-1.87) and A allele of G-875A significantly decreased the risk of developing GCA (adjusted OR = 0.73, 95% CI 0.49-0.92). When stratified for TNM stage, A allele of Int7G24A and G-875A allele carriers had a 1.41-fold (95% CI 1.05-1.98) increased and a 0.70-fold (95% CI 0.47-0.92) decreased risk of stage III and IV gastric cardia adenocarcinoma. The protein expression of TGFBR1 and TGFBR2 in GCA was not correlated with genotypes of them. In conclusions, TGFBR1 Int7G24A and TGFBR2 G-875A polymorphisms may play important roles in the risk of GCA in North China.
authors.affiliation: Department of Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, 12 Jiankanglu, Shijiazhuang, 050011, Hebei, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Dong
authors.forename: Yanli
authors.initials: Y
authors.lastname: Guo
authors.forename: Zhifeng
authors.initials: Z
authors.lastname: Chen
authors.forename: Zhibin
authors.initials: Z
authors.lastname: Yang
authors.forename: Gang
authors.initials: G
authors.lastname: Kuang
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics* / Q000473:pathology; D002299:Cardia / Q000378:metabolism / Q000473:pathology*; D016022:Case-Control Studies; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D007150:Immunohistochemistry; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D017346:Protein Serine-Threonine Kinases / Q000235:genetics* / Q000378:metabolism; D000077293:Receptor, Transforming Growth Factor-beta Type I; D000077294:Receptor, Transforming Growth Factor-beta Type II; D018125:Receptors, Transforming Growth Factor beta / Q000235:genetics* / Q000378:metabolism; D013274:Stomach Neoplasms / Q000235:genetics* / Q000473:pathology
chemical_list: D018125:Receptors, Transforming Growth Factor beta; D017346:Protein Serine-Threonine Kinases; D000077293:Receptor, Transforming Growth Factor-beta Type I; D000077294:Receptor, Transforming Growth Factor-beta Type II; C000625841:TGFBR1 protein, human