title: Functional variants of COX-2 and risk of tobacco-related oral squamous cell carcinoma in high-risk Asian Indians.
abstract: We assessed the association of COX-2 polymorphisms at promoter sites -1195, -765 and at 3'UTR (8473) in 193 patients with oral squamous cell carcinoma (OSCC) and 137 normal subjects by PCR-RFLP. Although no significant difference was observed in the frequency of COX-2 -1195G>A, -765G>C and 8473C>T single nucleotide polymorphisms (SNPs) between patients and controls, COX-2 -1195G/A genotype showed higher while -765G/C and 8473C/T showed lower prevalence in patients as compared to normal subjects. Logistic regression analysis of these three polymorphisms revealed a quantitative risk associated with -1195G>A SNP (OR 3.07 at 95%CI) while -765G>C and 8473C>T appeared to be protective. Results of the present study indicate that these three functional variants in the COX-2 regulatory region may contribute to risk modification of tobacco-related oral squamous cell carcinoma in Asian Indians.
authors.affiliation: Department of Biotechnology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110 029, India. manasimittal.1986@gmail.com
authors.forename: Manasi
authors.initials: M
authors.lastname: Mittal
authors.forename: Vaishali
authors.initials: V
authors.lastname: Kapoor
authors.forename: Bidhu Kalyan
authors.initials: BK
authors.lastname: Mohanti
authors.forename: Satya Narayan
authors.initials: SN
authors.lastname: Das
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000235:genetics*; D002294:Carcinoma, Squamous Cell / Q000208:ethnology / Q000235:genetics*; D051546:Cyclooxygenase 2 / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease / Q000235:genetics; D006801:Humans; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000208:ethnology / Q000235:genetics*; D009363:Neoplasm Proteins / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects; D014030:Tobacco, Smokeless / Q000009:adverse effects; D055815:Young Adult
chemical_list: D009363:Neoplasm Proteins; D051546:Cyclooxygenase 2