Head and neck squamous-cell cancer and its association with polymorphic enzymes of xenobiotic metabolism and repair

Harth, Volker, Schafer, Martin, Abel, Josef, Maintz, Laura, Neuhaus, Thomas, Besuden, Mette, Primke, Robert, Wilkesmann, Anja, Thier, Ricarda, Vetter, Hans, Ko, Yon-Dschun, Bruning, Thomas, Bolt, Hermann M., & Ickstadt, Katja (2008) Head and neck squamous-cell cancer and its association with polymorphic enzymes of xenobiotic metabolism and repair. Journal of Toxicology and Environmental Health, Part A : Current Issues, 71(13-14), pp. 887-897.

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Abstract

Tobacco smoking, alcohol drinking, and occupational exposures to polycyclic aromatic hydrocarbons are the major proven risk factors for human head and neck squamous-cell cancer (HNSCC). Major research focus on gene-environment interactions concerning HNSCC has been on genes encoding enzymes of metabolism for tobacco smoke constituents and repair enzymes. To investigate the role of genetically determined individual predispositions in enzymes of xenobiotic metabolism and in repair enzymes under the exogenous risk factor tobacco smoke in the carcinogenesis of HNSCC, we conducted a case-control study on 312 cases and 300 noncancer controls. We focused on the impact of 22 sequence variations in CYP1A1, CYP1B1, CYP2E1, ERCC2/XPD, GSTM1, GSTP1, GSTT1, NAT2, NQO1, and XRCC1. To assess relevant main and interactive effects of polymorphic genes on the susceptibility to HNSCC we used statistical models such as logic regression and a Bayesian version of logic regression. In subgroup analysis of nonsmokers, main effects in ERCC2 (Lys751Gln) C/C genotype and combined ERCC2 (Arg156Arg) C/A and A/A genotypes were predominant. When stratifying for smokers, the data revealed main effects on combined CYP1B1 (Leu432Val) C/G and G/G genotypes, followed by CYP1B1 (Leu432Val) G/G genotype and CYP2E1 (-70G>T) G/T genotype. When fitting logistic regression models including relevant main effects and interactions in smokers, we found relevant associations of CYP1B1 (Leu432Val) C/G genotype and CYP2E1 (-70G>T) G/T genotype (OR, 10.84; 95% CI, 1.64-71.53) as well as CYP1B1 (Leu432Val) G/G genotype and GSTM1 null/null genotype (OR, 11.79; 95% CI, 2.18-63.77) with HNSCC. The findings underline the relevance of genotypes of polymorphic CYP1B1 combined with exposures to tobacco smoke.

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ID Code: 74977
Item Type: Journal Article
Refereed: Yes
Additional Information: Special Issue: Symposium Part II-Interdisciplinary Activities in Environmental Toxicology in North Rhine-Westphalia, Germany
Keywords: Age Distribution, Base Sequence, Bayes Theorem, Carcinoma, Squamous Cell/ genetics, Case-Control Studies, DNA Repair/genetics, Female, Genetic Predisposition to Disease, Genotype, Head and Neck Neoplasms/ genetics, Humans, Logistic Models, Male, Middle Aged, Polymorphism, Genetic/ genetics, Sex Characteristics, Smoking, Toxicogenetics, Xenobiotics/ metabolism
DOI: 10.1080/15287390801988160
ISSN: 1528-7394
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PHARMACOLOGY AND PHARMACEUTICAL SCIENCES (111500) > Toxicology (incl. Clinical Toxicology) (111506)
Divisions: Current > Schools > School of Clinical Sciences
Current > QUT Faculties and Divisions > Faculty of Health
Copyright Owner: Copyright 2008 Taylor & Francis Group LLC
Deposited On: 11 Aug 2014 22:57
Last Modified: 13 Aug 2014 23:38

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