title: Polymorphism in cytochrome P4501A1 is significantly associated with head and neck cancer risk.
abstract: A case control study was undertaken to investigate the association of polymorphisms in cytochrome P4501A1 (CYP1A1) with squamous cell carcinoma of head and neck (HNSCC) in North Indian population. The variant genotypes of CYP1A1*2A and CYP1A1*2C were found to be overrepresented in cases when compared to controls. The HNSCC risk also increased several folds in cases with combination of variant genotypes of CYP1A1*2A or CYP1A1*2C with null genotype of glutathione-S-transferase M1 (GSTM1), a phase II enzyme, particularly in cases who were tobacco users (smokers and tobacco chewers), demonstrating the role of gene-gene and gene-environment interactions in the development of HNSCC.
authors.affiliation: Indian Institute of Toxicology Research, Lucknow, India.
authors.forename: Arvind P
authors.initials: AP
authors.lastname: Singh
authors.forename: Parag P
authors.initials: PP
authors.lastname: Shah
authors.forename: Munindra
authors.initials: M
authors.lastname: Ruwali
authors.forename: Neeraj
authors.initials: N
authors.lastname: Mathur
authors.forename: Mohan C
authors.initials: MC
authors.lastname: Pant
authors.forename: Devendra
authors.initials: D
authors.lastname: Parmar
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000201:enzymology / Q000235:genetics*; D016022:Case-Control Studies; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics*; D015971:Gene Expression Regulation, Enzymologic; D015972:Gene Expression Regulation, Neoplastic; D020022:Genetic Predisposition to Disease; D005982:Glutathione Transferase / Q000235:genetics; D006258:Head and Neck Neoplasms / Q000201:enzymology / Q000235:genetics*; D006801:Humans; D007194:India; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D018570:Risk Assessment; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects; D014030:Tobacco, Smokeless / Q000009:adverse effects
chemical_list: D019363:Cytochrome P-450 CYP1A1; D005982:Glutathione Transferase