Identification of p46 Shc expressed in the nuclei of hepatocytes with high proliferating activity: Study of regenerating rat liver

  • Authors:
    • Jin Yuji
    • Tsutomu Masaki
    • Shuhei Yoshida
    • Yuko Kita
    • Han Feng
    • Naohito Uchida
    • Hitoshi Yoshiji
    • Akira Kitanaka
    • Seishiro Watanabe
    • Kazutaka Kurokohchi
    • Shigeki Kuriyama
  • View Affiliations

  • Published online on: May 1, 2004     https://doi.org/10.3892/ijmm.13.5.721
  • Pages: 721-728
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Abstract

The adaptor molecule Shc is a proto-oncogene product, and it is known to be associated with cell proliferation. However, the role of Shc in the proliferation and regeneration of hepatocytes remains unknown. In the present study, we report that p46 Shc is specifically expressed in the nuclei of proliferative (or regenerative) hepatocytes, suggesting that p46 Shc protein plays a role in hepatocellular proliferation. The expression of Shc was analyzed in liver tissue after partial hepatectomy (PH) or sham operation in Wistar rats by using immunohistochemistry and/or Western blot analysis. In addition, the expression of various cell cycle-related proteins, such as Cdk4, cyclin D1, PCNA, and Cdk1 was analyzed in the tissues of regenerating rat liver. Furthermore, the tyrosine phosphorylation of Shc was studied in liver tissue after PH or sham operation by immunoprecipitation using a monoclonal phosphotyrosine antibody. Although the protein levels of p52 Shc were unchanged in liver tissues after PH or sham operation, tyrosine phosphorylation was detected only in the regenerating rat liver after PH. The levels of p46 Shc protein were markedly increased in liver tissues during the liver regenerative process. In contrast, p66 Shc was not detected in the liver tissues after PH or sham operation. Western blotting and immunohistochemistry showed that the main location of p46 Shc was in the nuclei of proliferating hepatocytes after PH. These data suggest that p46 Shc expressed in hepatocellular nuclei may be closely related to the proliferation of hepatocytes. Therefore, it is suggested that p46 Shc expressed in hepatocellular nuclei may be a useful marker for detecting hepatocytes with high proliferative activity.

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May 2004
Volume 13 Issue 5

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Yuji J, Masaki T, Yoshida S, Kita Y, Feng H, Uchida N, Yoshiji H, Kitanaka A, Watanabe S, Kurokohchi K, Kurokohchi K, et al: Identification of p46 Shc expressed in the nuclei of hepatocytes with high proliferating activity: Study of regenerating rat liver. Int J Mol Med 13: 721-728, 2004
APA
Yuji, J., Masaki, T., Yoshida, S., Kita, Y., Feng, H., Uchida, N. ... Kuriyama, S. (2004). Identification of p46 Shc expressed in the nuclei of hepatocytes with high proliferating activity: Study of regenerating rat liver. International Journal of Molecular Medicine, 13, 721-728. https://doi.org/10.3892/ijmm.13.5.721
MLA
Yuji, J., Masaki, T., Yoshida, S., Kita, Y., Feng, H., Uchida, N., Yoshiji, H., Kitanaka, A., Watanabe, S., Kurokohchi, K., Kuriyama, S."Identification of p46 Shc expressed in the nuclei of hepatocytes with high proliferating activity: Study of regenerating rat liver". International Journal of Molecular Medicine 13.5 (2004): 721-728.
Chicago
Yuji, J., Masaki, T., Yoshida, S., Kita, Y., Feng, H., Uchida, N., Yoshiji, H., Kitanaka, A., Watanabe, S., Kurokohchi, K., Kuriyama, S."Identification of p46 Shc expressed in the nuclei of hepatocytes with high proliferating activity: Study of regenerating rat liver". International Journal of Molecular Medicine 13, no. 5 (2004): 721-728. https://doi.org/10.3892/ijmm.13.5.721