title: FAS-670A/G polymorphism: A biomarker for the metastasis of nasopharyngeal carcinoma in a Chinese population.
abstract: BACKGROUND
  FAS-670 A/G single nucleotide polymorphism has been demonstrated to affect the expression of FAS gene by altering the transcriptional activity of FAS gene promoter. Downregulation of FAS with resultant resistance to death signals has been found in many cancers. We carried out a case-control study to investigate the biological significance of this polymorphism in nasopharyngeal carcinoma (NPC).
  
  
  METHODS
  FAS-670 A/G polymorphism was examined in a Chinese population of 237 patients with NPC and 264 control subjects using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique.
  
  
  RESULTS
  There were no significant differences in the genotype or allele distribution of FAS-670 A/G polymorphism between cases and controls. FAS-670 (AG+GG) genotype and G allele showed significant associations with an increasing risk of lymph node metastasis (OR=2.08, P=0.01; OR=1.67, P=0.011, respectively) and distant metastasis (OR=3.87, P=0.015; OR=1.81, P=0.03, respectively) of NPC patients. In addition, FAS-670 (AG+GG) genotype showed an increasing incidence of advanced clinical stage, but this finding was not statistically significant (OR=1.79, P=0.066).
  
  
  CONCLUSIONS
  The FAS-670 G allele could be used as a genetic risk marker for the metastasis of NPC patients.
authors.affiliation: Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, China.
authors.forename: Qingyao
authors.initials: Q
authors.lastname: Zhu
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.forename: Jinghua
authors.initials: J
authors.lastname: Ren
authors.forename: Kai
authors.initials: K
authors.lastname: Hu
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Gang
authors.initials: G
authors.lastname: Wu
mesh_terms: D044466:Asian People / Q000235:genetics*; D014408:Biomarkers, Tumor / Q000235:genetics*; D016022:Case-Control Studies; D002681:China; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000235:genetics* / Q000473:pathology*; D009362:Neoplasm Metastasis / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D019014:fas Receptor / Q000235:genetics*
chemical_list: D014408:Biomarkers, Tumor; C491901:FAS protein, human; D019014:fas Receptor