title: Significant association of cyclin D1 single nucleotide polymorphisms with oral cancer in taiwan.
abstract: The cell cycle regulator cyclin D1 (CCND1) is thought to play a major role in the transition of the cell cycle from G(1) to S-phase. It is known that cancer cells have unbalanced cell cycle regulation. This study aimed to investigate the association of CCND1 single nucleotide polymorphisms A870G (rs9344) and C1722G (rs678653) with oral cancer risk and examine the interaction between CCND1 and smoking habit.
  
  
  METHODS
  In this hospital-based case-control study, the CCND1 polymorphisms were investigated in 620 patients and 620 age- and gender-matched controls.
  
  
  RESULTS
  Significant differences were shown between the oral cancer and control groups in the distribution of the genotypes (p=0.0014) and allelic frequency (p=0.0027) in the CCND1 rs9344 genotype. Individuals who carried at least one G allele (GG or AG) had a 0.64-fold decreased risk of developing oral cancer compared to those who carried the AA wild-type genotype (95% CI: 0.50-0.81). There was an obvious joint effect of CCND1 rs9344 genotype with smoking habit on oral cancer.
  
  
  CONCLUSIONS
  Cell cycle regulation may play a role in oral carcinogenesis and CCND1 rs9344 polymorphism maybe a useful biomarker for oral oncology.
authors.affiliation: Department of Otolaryngology, China Medical University Hospital, Taichung, Taiwan, ROC. datian@mail.cmuh.org.tw
authors.forename: Ming-Hsui
authors.initials: MH
authors.lastname: Tsai
authors.forename: Chia-Wen
authors.initials: CW
authors.lastname: Tsai
authors.forename: Yung-An
authors.initials: YA
authors.lastname: Tsou
authors.forename: Chun-Hung
authors.initials: CH
authors.lastname: Hua
authors.forename: Chia-Fang
authors.initials: CF
authors.lastname: Hsu
authors.forename: Da-Tian
authors.initials: DT
authors.lastname: Bau
mesh_terms: D000483:Alleles; D016022:Case-Control Studies; D019938:Cyclin D1 / Q000235:genetics*; D004273:DNA, Neoplasm / Q000235:genetics; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000235:genetics* / Q000473:pathology; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011379:Prognosis; D013624:Taiwan
chemical_list: C530104:CCND1 protein, human; D004273:DNA, Neoplasm; D019938:Cyclin D1