title: Polymorphisms in promoter region of FAS and FASL gene and risk of cardia gastric adenocarcinoma.
abstract: OBJECTIVE
  The FAS and FASL system play an important role in regulating apoptotic cell death. This study was designed to investigate the correlation of FAS-1377 G/A, -670 A/G and FASL-844 T/C polymorphisms with susceptibility to gastric cardiac adenocarcinoma in a population of a high-incidence region of Hebei Province.
  
  
  METHODS
  FAS-1377 G/A, -670 A/G and FASL-844 T/C polymorphisms were genotyped by polymerase chain reaction-restriction fragment length polymorphism analysis in 262 gastric cardiac carcinoma (GCA) patients and 524 healthy controls.
  
  
  RESULTS
  Family history of upper gastrointestinal cancer (UGIC) might increase the risk of developing GCA (age- and sex-adjusted odds ratio [OR] = 1.38, 95% confidence interval [CI] = 1.02-1.86). The overall allelotype and genotype distributions of FAS-1377 G/A, and FASL-844 T/C polymorphisms in GCA patients did not significantly differ from that in healthy controls (P > 0.05). Compared with individuals with a FAS-670 A/A genotype, individuals with an A/G genotype in a smoker group had a lower risk of developing GCA (age, sex, and family history of UGIC adjusted OR = 0.55, 95% CI = 0.34-0.88). When the genotypes of FAS and FASL single nucleotide polymorphisms (SNP) were combined to analyze, no significant correlation was found between these SNP and the risk for GCA development.
  
  
  CONCLUSIONS
  In the high-incidence region of Hebei Province, FAS-1377 G/A and FASL-844 T/C polymorphisms were not associated with the risk of GCA. However, the FAS-670 A/G genotype might decrease the risk of GCA for smoker individuals.
authors.affiliation: Department of Molecular Biology, The Fourth Affiliated Hospital of Hebei Medical University, Hebei Province, China.
authors.forename: Rong-Miao
authors.initials: RM
authors.lastname: Zhou
authors.forename: Na
authors.initials: N
authors.lastname: Wang
authors.forename: Zhi-Feng
authors.initials: ZF
authors.lastname: Chen
authors.forename: Ya-Nan
authors.initials: YN
authors.lastname: Duan
authors.forename: Dong-Lan
authors.initials: DL
authors.lastname: Sun
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
mesh_terms: D000230:Adenocarcinoma / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D000328:Adult; D000368:Aged; D000483:Alleles; D014408:Biomarkers, Tumor / Q000235:genetics*; D002299:Cardia / Q000473:pathology; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D053222:Fas Ligand Protein / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic; D018570:Risk Assessment; D012307:Risk Factors; D012494:Sampling Studies; D012907:Smoking / Q000009:adverse effects; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D055815:Young Adult; D019014:fas Receptor / Q000235:genetics*
chemical_list: D014408:Biomarkers, Tumor; D053222:Fas Ligand Protein; D019014:fas Receptor