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Article

Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection

  • Authors:
    • Jiang Long
    • Yan Wang
    • Man Li
    • Wei-Min Tong
    • Ji-Dong Jia
    • Jian Huang
  • View Affiliations / Copyright

    Affiliations: Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, P.R. China, Department of Pathology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China
  • Pages: 119-124
    |
    Published online on: April 26, 2013
       https://doi.org/10.3892/or.2013.2430
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Abstract

Although it is known that chronic hepatitis C virus (HCV) infection may contribute to tumor initiation and development, the molecular processes causing hepatocellular carcinoma (HCC) remain unclear. Microindels are unique, infrequent mutations that result in inserted and deleted sequences at the same nucleotide position, and are important contributors to cancer. To date, microindels in the p53 tumor suppressor gene (TP53) have not been fully examined in tumors. In the present study, 116 cases of HCC were screened for mutations in the TP53 gene (exon 5-8) by single-stranded conformational polymorphism analysis followed by direct sequencing. A special type of complex TP53 mutation, 616ins14del1 (14-1 microindel), was identified in a case of HCC with HCV infection. This rare TP53 microindel led to the generation of a truncated protein of 211 amino acids that lacked the DNA-binding domain and tetramerization domain. Immunohistochemistry showed loss of p53 protein expression and downregulation of p21WAF/CIP, Mdm2 and Bax in the tumor cells, indicating an impaired p53 signaling pathway. Nineteen of the 116 (16.4%) HCCs carried a total of 19 TP53 mutations. Notably, 5 of the 13 HCV-positive (38.5%) cases contained a TP53 mutation, and there was a significant association between TP53 mutations and HCV positivity (P=0.0379). No correlation of TP53 mutations with hepatitis B virus (HBV) positivity was observed. In summary, we identified a novel TP53 microindel in HCC, and provided evidence of HCC characterized by HCV infections typically associated with mutational inactivation of the TP53 gene.
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Copy and paste a formatted citation
Spandidos Publications style
Long J, Wang Y, Li M, Tong W, Jia J and Huang J: Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection. Oncol Rep 30: 119-124, 2013.
APA
Long, J., Wang, Y., Li, M., Tong, W., Jia, J., & Huang, J. (2013). Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection. Oncology Reports, 30, 119-124. https://doi.org/10.3892/or.2013.2430
MLA
Long, J., Wang, Y., Li, M., Tong, W., Jia, J., Huang, J."Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection". Oncology Reports 30.1 (2013): 119-124.
Chicago
Long, J., Wang, Y., Li, M., Tong, W., Jia, J., Huang, J."Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection". Oncology Reports 30, no. 1 (2013): 119-124. https://doi.org/10.3892/or.2013.2430
Copy and paste a formatted citation
x
Spandidos Publications style
Long J, Wang Y, Li M, Tong W, Jia J and Huang J: Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection. Oncol Rep 30: 119-124, 2013.
APA
Long, J., Wang, Y., Li, M., Tong, W., Jia, J., & Huang, J. (2013). Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection. Oncology Reports, 30, 119-124. https://doi.org/10.3892/or.2013.2430
MLA
Long, J., Wang, Y., Li, M., Tong, W., Jia, J., Huang, J."Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection". Oncology Reports 30.1 (2013): 119-124.
Chicago
Long, J., Wang, Y., Li, M., Tong, W., Jia, J., Huang, J."Correlation of TP53 mutations with HCV positivity in hepatocarcinogenesis: Identification of a novel TP53 microindel in hepatocellular carcinoma with HCV infection". Oncology Reports 30, no. 1 (2013): 119-124. https://doi.org/10.3892/or.2013.2430
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