title: The association between hypoxia inducible factor-1alpha gene polymorphisms and increased susceptibility to oral cancer.
abstract: The aim of this study was to estimate the relations between hypoxia inducible factor-1alpha (HIF-1alpha) gene polymorphisms, C1772T and G1790A, to the susceptibility and clinicopathological status of oral cancer. A total of 521 subjects, including 347 controls and 174 oral cancer patients, were recruited in this study and subjected to polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) to analyze the impact of these two polymorphic variants on oral cancer. A significant association between oral cancer susceptibility and G1790A polymorphism was demonstrated since individuals with heterozygotes, that is GA, had a higher risk for oral cancer, compared to GG genotypes after adjusting for other confounders (AOR=3.31; 95%CI=1.27-8.61). Compared to individuals with both C1772C and G1790G homozygotes, individuals with at least one of either C1772T or G1790A of HIF-1alpha gene had a risk of 2.17-folds (95% CI=1.0-4.75) to develop oral cancer. Moreover, results also revealed the presence of synergistic effect between gene polymorphisms of HIF-1alpha and environmental risk factors, such as tobacco and betel nut consumptions while there was no significant association between HIF-1alpha gene polymorphism and clinicopathological parameters of oral cancer. Genetic polymorphism, including C1772T and G1790A, of HIF-1alpha is an important factor for the susceptibility to oral cancer.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Changhua Christian Hospital, Changhua, Taiwan; Mingdao University, Changhua, Taiwan.
authors.forename: Mu-Kuan
authors.initials: MK
authors.lastname: Chen
authors.forename: Hui-Ling
authors.initials: HL
authors.lastname: Chiou
authors.forename: Shih-Chi
authors.initials: SC
authors.lastname: Su
authors.forename: Tsung-Te
authors.initials: TT
authors.lastname: Chung
authors.forename: Hsien-Chun
authors.initials: HC
authors.lastname: Tseng
authors.forename: Hsiu-Ting
authors.initials: HT
authors.lastname: Tsai
authors.forename: Shun-Fa
authors.initials: SF
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D001114:Areca / Q000009:adverse effects; D016022:Case-Control Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000453:epidemiology / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods; D012150:Polymorphism, Restriction Fragment Length; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology; D013624:Taiwan / Q000453:epidemiology
chemical_list: D051795:Hypoxia-Inducible Factor 1, alpha Subunit