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Expression of O6 Methyl Guanine Methyl Transferase (Mgmt) in Oral Squamous Cell Carcinoma Patients in Alexandria, Egypt (Smokers and Non-Smokers)

Received: 6 August 2014     Accepted: 16 August 2014     Published: 30 August 2014
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Abstract

Objectives: O6-methylguanine-DNA methyltransferase (MGMT) removes mutagenic, carcinogenic, and cytotoxic adducts from O6-methylguanine in DNA through a direct reversal mechanism. Decreased expression of MGMT has been reported in a variety of human malignant tumors. The purpose of this study was to clarify the correlation of MGMT expression levels in oral squamous cell carcinoma (OSCC) and cigarette smoking. Study Design: MGMT protein expression in 22 cases of oral squamous cell carcinoma by immunohistochemistry was investigated. Correlation with detailed tobacco history was then tested by statistical analysis. Results: All the non smoker OSCC cases showed positive immunoexpression. However 3 cases of the smoker patient revealed a weak positive immunostaining with only sporadic cells at the periphery. Conclusion: The results suggest that the absence of MGMT expression is related strongly to tobacco smoking and, thus, might be a significant event in oral carcinogenesis.

Published in American Journal of Life Sciences (Volume 2, Issue 4)
DOI 10.11648/j.ajls.20140204.15
Page(s) 217-223
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

O6-Methylguanine-DNA Methyltransferase, Tobacco, Oral Squamous Cell Carcinoma

References
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Cite This Article
  • APA Style

    Hend Mohamed Helmy, Taissir Ali Omar, Sahar Mohamed ElSheikh, Ahmed Serag Habib. (2014). Expression of O6 Methyl Guanine Methyl Transferase (Mgmt) in Oral Squamous Cell Carcinoma Patients in Alexandria, Egypt (Smokers and Non-Smokers). American Journal of Life Sciences, 2(4), 217-223. https://doi.org/10.11648/j.ajls.20140204.15

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    ACS Style

    Hend Mohamed Helmy; Taissir Ali Omar; Sahar Mohamed ElSheikh; Ahmed Serag Habib. Expression of O6 Methyl Guanine Methyl Transferase (Mgmt) in Oral Squamous Cell Carcinoma Patients in Alexandria, Egypt (Smokers and Non-Smokers). Am. J. Life Sci. 2014, 2(4), 217-223. doi: 10.11648/j.ajls.20140204.15

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    AMA Style

    Hend Mohamed Helmy, Taissir Ali Omar, Sahar Mohamed ElSheikh, Ahmed Serag Habib. Expression of O6 Methyl Guanine Methyl Transferase (Mgmt) in Oral Squamous Cell Carcinoma Patients in Alexandria, Egypt (Smokers and Non-Smokers). Am J Life Sci. 2014;2(4):217-223. doi: 10.11648/j.ajls.20140204.15

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  • @article{10.11648/j.ajls.20140204.15,
      author = {Hend Mohamed Helmy and Taissir Ali Omar and Sahar Mohamed ElSheikh and Ahmed Serag Habib},
      title = {Expression of O6 Methyl Guanine Methyl Transferase (Mgmt) in Oral Squamous Cell Carcinoma Patients in Alexandria, Egypt (Smokers and Non-Smokers)},
      journal = {American Journal of Life Sciences},
      volume = {2},
      number = {4},
      pages = {217-223},
      doi = {10.11648/j.ajls.20140204.15},
      url = {https://doi.org/10.11648/j.ajls.20140204.15},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajls.20140204.15},
      abstract = {Objectives: O6-methylguanine-DNA methyltransferase (MGMT) removes mutagenic, carcinogenic, and cytotoxic adducts from O6-methylguanine in DNA through a direct reversal mechanism. Decreased expression of MGMT has been reported in a variety of human malignant tumors. The purpose of this study was to clarify the correlation of MGMT expression levels in oral squamous cell carcinoma (OSCC) and cigarette smoking. Study Design: MGMT protein expression in 22 cases of oral squamous cell carcinoma by immunohistochemistry was investigated. Correlation with detailed tobacco history was then tested by statistical analysis. Results: All the non smoker OSCC cases showed positive immunoexpression. However 3 cases of the smoker patient revealed a weak positive immunostaining with only sporadic cells at the periphery. Conclusion: The results suggest that the absence of MGMT expression is related strongly to tobacco smoking and, thus, might be a significant event in oral carcinogenesis.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Expression of O6 Methyl Guanine Methyl Transferase (Mgmt) in Oral Squamous Cell Carcinoma Patients in Alexandria, Egypt (Smokers and Non-Smokers)
    AU  - Hend Mohamed Helmy
    AU  - Taissir Ali Omar
    AU  - Sahar Mohamed ElSheikh
    AU  - Ahmed Serag Habib
    Y1  - 2014/08/30
    PY  - 2014
    N1  - https://doi.org/10.11648/j.ajls.20140204.15
    DO  - 10.11648/j.ajls.20140204.15
    T2  - American Journal of Life Sciences
    JF  - American Journal of Life Sciences
    JO  - American Journal of Life Sciences
    SP  - 217
    EP  - 223
    PB  - Science Publishing Group
    SN  - 2328-5737
    UR  - https://doi.org/10.11648/j.ajls.20140204.15
    AB  - Objectives: O6-methylguanine-DNA methyltransferase (MGMT) removes mutagenic, carcinogenic, and cytotoxic adducts from O6-methylguanine in DNA through a direct reversal mechanism. Decreased expression of MGMT has been reported in a variety of human malignant tumors. The purpose of this study was to clarify the correlation of MGMT expression levels in oral squamous cell carcinoma (OSCC) and cigarette smoking. Study Design: MGMT protein expression in 22 cases of oral squamous cell carcinoma by immunohistochemistry was investigated. Correlation with detailed tobacco history was then tested by statistical analysis. Results: All the non smoker OSCC cases showed positive immunoexpression. However 3 cases of the smoker patient revealed a weak positive immunostaining with only sporadic cells at the periphery. Conclusion: The results suggest that the absence of MGMT expression is related strongly to tobacco smoking and, thus, might be a significant event in oral carcinogenesis.
    VL  - 2
    IS  - 4
    ER  - 

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Author Information
  • Department of Oral Pathology, Faculty of Dentistry, Alexandria University, Egypt

  • Department of Oral Pathology, Faculty of Dentistry, Alexandria University, Egypt

  • Department of Oral Pathology, Faculty of Dentistry, Alexandria University, Egypt

  • Department of Cranio Maxillofacial and Plastic Surgery, Faculty of Dentistry, Alexandria University, Egypt

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