MDM2 and TP53 Polymorphisms as Predictive Markers for Head and Neck Cancer in Northeast Indian Population: Effect of Gene-Gene and Gene-Environment Interactions

Bhowmik, Aditi; Das, Sambuddha; Bhattacharjee, Abhinandan; Choudhury, Biswadeep; Naiding, Momota; Deka, Sujata; Ghosh, Sankar Kumar; Choudhury, Yashmin

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저자정보: Bhowmik, Aditi (Department of Biotechnology, Assam University) Das, Sambuddha (Department of Biotechnology, Assam University) Bhattacharjee, Abhinandan (Department of ENT, Silchar Medical College and Hospital) Choudhury, Biswadeep (Department of Biochemistry, Silchar Medical College and Hospital) Naiding, Momota (Department of Pathology, Silchar Medical College and Hospital) Deka, Sujata (Department of Biotechnology, Assam University) Ghosh, Sankar Kumar (Department of Biotechnology, Assam University) Choudhury, Yashmin (Department of Biotechnology, Assam University)

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제16권 제14호

발행연도: 2015.1

수록면: 5,767 - 5,772 (6page)

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Background: Polymorphisms in the MDM2 309 (T>G) and TP53 72 (G>C) genes are reported to increase the susceptibility to head and neck cancer (HNC) in various populations. The risk for HNC is also strongly associated with etiologic habits such as smoking, alcohol consumption and/or chewing of betel quid (BQ). In a case-control study, we investigated the significance of the above polymorphisms alone, and upon interaction with one another as well as with various etiologic habits in determining HNC risk in a Northeast Indian population. Materials and Methods: Genotyping at 309 MDM2 and 72 TP53 in 122 HNC patients and 86 cancer free healthy controls was performed by PCR using allele specific primers, and the results were confirmed by DNA sequencing. Results: Individuals with the GG mutant allele of MDM2 showed a higher risk for HNC in comparison to those with the TT wild type allele (OR=1.9, 95%CI: 1.1-3.3) (p=0.022). The risk was further increased in females by ~4-fold (OR=4.6, 95% CI: 1.1-19.4) (P=0.04). TP53 polymorphism did not contribute to HNC risk alone; however, interaction between the TP53 GC and MDM2 GG genotypes resulted in significant risk (OR=4.9, 95% CI: 0.2-105.1) (p=0.04). Smokers, BQ- chewers and alcohol consumers showed statistically significant and dose-dependent increase in HNC risk, irrespective of the MDM2 genotype. Conclusions: MDM2 genotype could serve as an important predictive biomarker for HNC risk in the population of Northeast India.

#Head and neck cancer #smoking- betel quid chewing- alcohol consumption

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