title: TGFBR1 haplotypes and risk of non-small-cell lung cancer.
abstract: Transforming growth factor beta (TGF-beta) receptors are centrally involved in TGF-beta-mediated cell growth and differentiation and are frequently inactivated in non-small-cell lung cancer (NSCLC). Constitutively decreased type I TGF-beta receptor (TGFBR1) expression is emerging as a novel tumor-predisposing phenotype. The association of TGFBR1 haplotypes with risk for NSCLC has not yet been studied. We tested the hypothesis that single-nucleotide polymorphisms (SNP) and/or TGFBR1 haplotypes are associated with risk of NSCLC. We genotyped six TGFBR1 haplotype-tagging SNPs (htSNP) by PCR-RFLP assays and one htSNP by PCR-single-strand conformation polymorphism assay in two case-control studies. Case-control study 1 included 102 NSCLC patients and 104 healthy controls from Suzhou. Case-control study 2 included 131 patients with NSCLC and 133 healthy controls from Wuxi. Individuals included in both case-control studies were Han Chinese. Haplotypes were reconstructed according to the genotyping data and linkage disequilibrium status of these seven htSNPs. None of the htSNP was associated with NSCLC risk in either study. However, a four-marker CTGC haplotype was significantly more common among controls than among cases in both studies (P = 0.014 and P = 0.010, respectively), indicating that this haplotype is associated with decreased NSCLC risk {adjusted odds ratio [OR], 0.09 [95% confidence interval (95% CI), 0.01-0.61] and 0.11 [95% CI, 0.02-0.59], respectively}. Combined analysis of both studies shows a strong association of this four-marker haplotype with decreased NSCLC risk (adjusted OR, 0.11; 95% CI, 0.03-0.39). This is the first evidence of an association between a TGFBR1 haplotype and risk for NSCLC.
authors.affiliation: Laboratory of Medical Genetics, School of Basic Medicine and Biological Sciences, The First Affiliated Hospital, Medical College of Soochow University, Suzhou, PR China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Lei
authors.forename: Reng-Yun
authors.initials: RY
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Zhao
authors.forename: Zeyi
authors.initials: Z
authors.lastname: Liu
authors.forename: Xiefang
authors.initials: X
authors.lastname: Jiang
authors.forename: Weiming
authors.initials: W
authors.lastname: You
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Chen
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.forename: Kui
authors.initials: K
authors.lastname: Zhang
authors.forename: Boris
authors.initials: B
authors.lastname: Pasche
authors.forename: Hong-Tao
authors.initials: HT
authors.lastname: Zhang
mesh_terms: D000367:Age Factors; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D006239:Haplotypes; D006801:Humans; D007438:Introns; D015810:Linkage Disequilibrium; D008175:Lung Neoplasms / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide; D017346:Protein Serine-Threonine Kinases / Q000235:genetics*; D000077293:Receptor, Transforming Growth Factor-beta Type I; D018125:Receptors, Transforming Growth Factor beta / Q000235:genetics*; D012737:Sex Factors
chemical_list: D018125:Receptors, Transforming Growth Factor beta; D017346:Protein Serine-Threonine Kinases; D000077293:Receptor, Transforming Growth Factor-beta Type I; C000625841:TGFBR1 protein, human
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