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Prevalence of CYP1A1 and GST Polymorphisms in the Population of Northeastern India and Susceptibility of Oral Cancer

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Abstract:

Individual cancer susceptibility is the result of several host factors, including differences in lifestyle habits and genetic susceptibility. There is a correlation between CYP1A1 polymorphism (MspI) and oral cancer susceptibility. Individuals carrying the deletions of GSTM1 and GSTT1 are at high risk of developing oral cancers. In the present study on healthy tribal and nontribal individuals of Assam, we found that the genetic variation of GSST polymorphisms is evident (p = 0.20) with differential dose of toxic exposure. Prevalence of different polymorphic alleles of CYP1A1 also proves the same result. A mini-case-control study with very small sample size showed no marked increase in the risk of developing oral cancer as the frequencies of the studied GST genotypes did not show any statistical significance. But GSTT1-null genotypes were found to have higher risk of developing leukoplakia (OR 1.94, 95% CI 2.61‐18.54). CYP1A1 genotype m2 allele was also not found to be associated with the risk of developing leukoplakias in the population.

Keywords: Gene polymorphism; Mutation; Oral cancer; Population; Tobacco

Document Type: Research Article

DOI: http://dx.doi.org/10.3727/096504009788912499

Publication date: September 1, 2009

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  • Formerly: Oncology Research Incorporating Anti-Cancer Drug Design
    Oncology Research Featuring Preclinical and Clincal Cancer Therapeutics publishes research of the highest quality that contributes to an understanding of cancer in areas of molecular biology, cell biology, biochemistry, biophysics, genetics, biology, endocrinology, and immunology, as well as studies on the mechanism of action of carcinogens and therapeutic agents, reports dealing with cancer prevention and epidemiology, and clinical trials delineating effective new therapeutic regimens.
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