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Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation

  • Authors:
    • Minwen Zhu
    • Wei Liu
    • Linjun Shi
    • Xuan Xiao
    • Wenyan Wu
    • Lan Wu
    • Zengtong Zhou
  • View Affiliations / Copyright

    Affiliations: Department of Oral Mucosal Diseases, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China, Department of Oral and Maxillofacial‑Head and Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
    Copyright: © Zhu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 9827-9835
    |
    Published online on: April 25, 2018
       https://doi.org/10.3892/ol.2018.8574
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Abstract

The present study assessed the expression of the DNA doublestrand repair (DDR) proteins ATM serine/threonine kinase (ATM), checkpoint kinase 2 (CHEK2) and γH2A histone family member X (γH2AFX) in oral leukoplakia (OL) and evaluated their clinical significance and usefulness as biomarkers for predicting OL transformation. Retrospectively, ATM, CHEK2 and γH2AFX protein levels were evaluated using immunohistochemical analysis in 61 OL, 33 oral squamous cell carcinoma (OSCC) and 15 normal oral mucosa tissues. OL tissues were classified into two groups according to the epithelial dysplasia pathology: The low risk dysplasia group (n=41) and the high‑risk dysplasia group (n=20). The results of the present study revealed that the expression of ATM and γH2AFX in OSCC was significantly increased compared with that in OL with low‑risk dysplasia and normal oral mucosa tissues. There was no statistically significant difference in CHEK2 expression among the groups. ATM expression was correlated with that of γH2AFX in OSCC tissue. The prognostic values of the DDR proteins and their correlation with clinical and pathological parameters were evaluated further in 99 OL patients with low risk dysplasia. Multivariate analysis revealed that increased expression of ATM and γH2AFX was significantly associated with an increased risk of malignant transformation. Immunohistochemical analysis of ATM and γH2AFX protein expression provided useful prognostic information on the carcinogenesis of OL. Increased ATM and γH2AFX expression may indicate a poor prognosis.
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Copy and paste a formatted citation
Spandidos Publications style
Zhu M, Liu W, Shi L, Xiao X, Wu W, Wu L and Zhou Z: Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation. Oncol Lett 15: 9827-9835, 2018.
APA
Zhu, M., Liu, W., Shi, L., Xiao, X., Wu, W., Wu, L., & Zhou, Z. (2018). Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation. Oncology Letters, 15, 9827-9835. https://doi.org/10.3892/ol.2018.8574
MLA
Zhu, M., Liu, W., Shi, L., Xiao, X., Wu, W., Wu, L., Zhou, Z."Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation". Oncology Letters 15.6 (2018): 9827-9835.
Chicago
Zhu, M., Liu, W., Shi, L., Xiao, X., Wu, W., Wu, L., Zhou, Z."Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation". Oncology Letters 15, no. 6 (2018): 9827-9835. https://doi.org/10.3892/ol.2018.8574
Copy and paste a formatted citation
x
Spandidos Publications style
Zhu M, Liu W, Shi L, Xiao X, Wu W, Wu L and Zhou Z: Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation. Oncol Lett 15: 9827-9835, 2018.
APA
Zhu, M., Liu, W., Shi, L., Xiao, X., Wu, W., Wu, L., & Zhou, Z. (2018). Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation. Oncology Letters, 15, 9827-9835. https://doi.org/10.3892/ol.2018.8574
MLA
Zhu, M., Liu, W., Shi, L., Xiao, X., Wu, W., Wu, L., Zhou, Z."Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation". Oncology Letters 15.6 (2018): 9827-9835.
Chicago
Zhu, M., Liu, W., Shi, L., Xiao, X., Wu, W., Wu, L., Zhou, Z."Expression of DNA doublestrand repair proteins in oral leukoplakia and the risk of malignant transformation". Oncology Letters 15, no. 6 (2018): 9827-9835. https://doi.org/10.3892/ol.2018.8574
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