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Article

Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice

  • Authors:
    • Xueyun Huo
    • Zhenkun Li
    • Shuangyue Zhang
    • Changlong Li
    • Meng Guo
    • Jing Lu
    • Jianyi Lv
    • Xiaoyan Du
    • Zhenwen Chen
  • View Affiliations / Copyright

    Affiliations: Department of Medical Genetics, School of Basic Medical Science, Capital Medical University, Beijing 100069, P.R. China
  • Pages: 4339-4348
    |
    Published online on: August 4, 2017
       https://doi.org/10.3892/ol.2017.6721
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Abstract

Tumorigenesis is often caused by somatic mutation or epigenetic changes in genes that regulate aspects of cell death, proliferation and survival. Although the functions of multiple tumor suppressor genes have been well studied in isolation, how these genes cooperate during the progression of a single tumor remains unclear in numerous cases. The present study used N‑methyl‑N‑nitrosourea (MNU), one of the most potent mutagenic nitrosourea compounds, to induce thymic lymphoma in C57BL/6J mice. Subsequently, the protein expression levels of phosphatase and tensin homolog (PTEN), transformation protein 53 and mutS homolog 2 (MSH2) were evaluated concomitantly in the thymus, liver, kidney and spleen of MNU‑treated mice by western blotting. To determine whether changes in expression level were due to aberrant epigenetic regulation, the present study further examined the methylation status of each gene by MassARRAY analysis. During the tumorigenesis process of an MNU‑induced single thymic lymphoma, the expression level of PTEN was revealed to be reduced in thymic lymphoma samples but not in normal or non‑tumor thymus tissue samples. Furthermore, a marked reduction of P53 expression levels were demonstrated in thymic lymphomas and spleens with a metastatic tumor. Conversely, MSH2 upregulation was identified only in liver, kidney, and spleen samples that were infiltrated by thymic lymphoma cells. Furthermore, the present study revealed that a number of 5'‑C‑phosphate‑G‑3' sites located in the promoter of aberrantly expressed genes had significantly altered methylation statuses. These results improve the understanding of the course of mutagen‑induced cancer, and highlight that epigenetic regulation may serve an important function in cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Huo X, Li Z, Zhang S, Li C, Guo M, Lu J, Lv J, Du X and Chen Z: Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice. Oncol Lett 14: 4339-4348, 2017.
APA
Huo, X., Li, Z., Zhang, S., Li, C., Guo, M., Lu, J. ... Chen, Z. (2017). Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice. Oncology Letters, 14, 4339-4348. https://doi.org/10.3892/ol.2017.6721
MLA
Huo, X., Li, Z., Zhang, S., Li, C., Guo, M., Lu, J., Lv, J., Du, X., Chen, Z."Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice". Oncology Letters 14.4 (2017): 4339-4348.
Chicago
Huo, X., Li, Z., Zhang, S., Li, C., Guo, M., Lu, J., Lv, J., Du, X., Chen, Z."Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice". Oncology Letters 14, no. 4 (2017): 4339-4348. https://doi.org/10.3892/ol.2017.6721
Copy and paste a formatted citation
x
Spandidos Publications style
Huo X, Li Z, Zhang S, Li C, Guo M, Lu J, Lv J, Du X and Chen Z: Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice. Oncol Lett 14: 4339-4348, 2017.
APA
Huo, X., Li, Z., Zhang, S., Li, C., Guo, M., Lu, J. ... Chen, Z. (2017). Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice. Oncology Letters, 14, 4339-4348. https://doi.org/10.3892/ol.2017.6721
MLA
Huo, X., Li, Z., Zhang, S., Li, C., Guo, M., Lu, J., Lv, J., Du, X., Chen, Z."Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice". Oncology Letters 14.4 (2017): 4339-4348.
Chicago
Huo, X., Li, Z., Zhang, S., Li, C., Guo, M., Lu, J., Lv, J., Du, X., Chen, Z."Analysis of the expression level and methylation of tumor protein p53, phosphatase and tensin homolog and mutS homolog 2 in N-methyl-N-nitrosourea-induced thymic lymphoma in C57BL/6 mice". Oncology Letters 14, no. 4 (2017): 4339-4348. https://doi.org/10.3892/ol.2017.6721
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