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2018 | 65 | 1 | 87-92
Article title

The role of MGMT polymorphisms rs12917 and rs11016879 in head and neck cancer risk and prognosis

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Head and neck squamous cell carcinoma (HNSCC) is one of the leading cancers by incidence worldwide. The risk of these cancers is strictly associated with alkylation factors present in tobacco smoke. The crucial role in preventing DNA alkylation is played by O6-methylguanine-DNA methyltransferase (MGMT). Dysfunction or lack of MGMT is associated with an increased risk of cancer. The aim of the study was to assess the influence of MGMT polymorphisms: rs12917 and rs11016879 on HNSCC risk and course. The study consisted of 69 HNSCC patients and 242 healthy individuals. Case samples were taken from resected tumour tissue. The control group comprised samples of epithelial cells collected from mucous membranes using swabs. DNA samples were genotyped by employing the 5' nuclease assay for allelic discrimination using TaqMan SNP Genotyping Assays. The significance between distributions of genotypes and alleles was tested using Pearson's χ2 test analysis. Our results indicated that the MGMT rs12917 TT genotype increases the risk of HNSCC. The MGMT rs11016879 AG genotype and A allele were associated with increased HNSCC risk. We noted higher risk of nodal metastasis in rs11016879 AA homozygotes. Mechanisms leading to MGMT enzymatic defect are unknown and hence further studies need to be carried out. Our data suggest that the examined polymorphisms may be considered as potential prognostic factors for HNSCC risk and outcome. Further studies are necessary to verify our results.
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  • Department of Medical and Molecular Biology, School of Medicine with the Division of Dentistry, Medical University of Silesia in Zabrze, Katowice, Poland
  • Department of Medical and Molecular Biology, School of Medicine with the Division of Dentistry, Medical University of Silesia in Zabrze, Katowice, Poland
  • Department of Medical and Molecular Biology, School of Medicine with the Division of Dentistry, Medical University of Silesia in Zabrze, Katowice, Poland
  • Department of Medical and Molecular Biology, School of Medicine with the Division of Dentistry, Medical University of Silesia in Zabrze, Katowice, Poland
  • Department of Medical and Molecular Biology, School of Medicine with the Division of Dentistry, Medical University of Silesia in Zabrze, Katowice, Poland
  • 2nd Department of Cardiology and Angiology, Silesian Center for Heart Disease, Zabrze, Poland
  • Genomics Laboratory, Kardio-Med Silesia Science and Technology Park, Zabrze, Poland
  • Department of Oncological and Reconstructive Surgery, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
  • Department of Medical and Molecular Biology, School of Medicine with the Division of Dentistry, Medical University of Silesia in Zabrze, Katowice, Poland
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