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Article Open Access

The Eltrombopag antitumor effect on hepatocellular carcinoma

  • Authors:
    • Tomohiro Kurokawa
    • Soichiro Murata
    • Yun-Wen Zheng
    • Kenichi Iwasaki
    • Keisuke Kohno
    • Kiyoshi Fukunaga
    • Nobuhiro Ohkohchi
  • View Affiliations / Copyright

    Affiliations: Department of Surgery, Division of Gastroenterological and Hepatobiliary Surgery, and Organ Transplantation, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
    Copyright: © Kurokawa et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1696-1702
    |
    Published online on: September 23, 2015
       https://doi.org/10.3892/ijo.2015.3180
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Abstract

Currently, sorafenib is the only available chemotherapeutic agent for advanced hepatocellular carcinoma (HCC), but it cannot be used in patients with liver cirrhosis (LC) or thrombocytopenia. In these cases, sorafenib is likely effective if given in combination with treatments that increase the number of platelets, such as thrombopoietin (TPO) receptor agonists. Increasing the platelet count via TPO treatment resulted in reduction of LC. Eltrombopag (EP), a TPO receptor agonist, has been reported to have antitumor effects against certain cancers, despite their lack of TPO receptor expression. We hypothesized that EP may possess antitumor activity against HCC in addition to its ability to suppress hepatic fibrosis by increasing the platelet count. In the present study, the antitumor activity of EP was examined by assessing the inhibition of cell proliferation and then ascertaining the ability of iron supplementation to reverse these effects in HepG2, Hep3B and Huh7 cells. In addition, a cell cycle assay was performed using flow cytometry, and signal transduction was evaluated by analyzing cell cycle-related protein expression. The results of EP were compared with those of the most common iron chelator, deferoxamine (DFO). The combined effect of EP and sorafenib was also assessed. The results revealed that EP exerts antitumor activity in HCC that is mediated by the modulation of intracellular iron content. EP suppressed the expression of the cell cycle-related protein cyclin D1 and elicited cell cycle arrest in the G0/G1 phase. The activity of EP was comparable to that of DFO in HCC, and EP did not compete with sorafenib at low concentrations. In conclusion, our findings suggest that EP is a good candidate chemotherapeutic agent for the treatment of HCC in patients with LC and thrombocytopenia.
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Copy and paste a formatted citation
Spandidos Publications style
Kurokawa T, Murata S, Zheng Y, Iwasaki K, Kohno K, Fukunaga K and Ohkohchi N: The Eltrombopag antitumor effect on hepatocellular carcinoma. Int J Oncol 47: 1696-1702, 2015.
APA
Kurokawa, T., Murata, S., Zheng, Y., Iwasaki, K., Kohno, K., Fukunaga, K., & Ohkohchi, N. (2015). The Eltrombopag antitumor effect on hepatocellular carcinoma. International Journal of Oncology, 47, 1696-1702. https://doi.org/10.3892/ijo.2015.3180
MLA
Kurokawa, T., Murata, S., Zheng, Y., Iwasaki, K., Kohno, K., Fukunaga, K., Ohkohchi, N."The Eltrombopag antitumor effect on hepatocellular carcinoma". International Journal of Oncology 47.5 (2015): 1696-1702.
Chicago
Kurokawa, T., Murata, S., Zheng, Y., Iwasaki, K., Kohno, K., Fukunaga, K., Ohkohchi, N."The Eltrombopag antitumor effect on hepatocellular carcinoma". International Journal of Oncology 47, no. 5 (2015): 1696-1702. https://doi.org/10.3892/ijo.2015.3180
Copy and paste a formatted citation
x
Spandidos Publications style
Kurokawa T, Murata S, Zheng Y, Iwasaki K, Kohno K, Fukunaga K and Ohkohchi N: The Eltrombopag antitumor effect on hepatocellular carcinoma. Int J Oncol 47: 1696-1702, 2015.
APA
Kurokawa, T., Murata, S., Zheng, Y., Iwasaki, K., Kohno, K., Fukunaga, K., & Ohkohchi, N. (2015). The Eltrombopag antitumor effect on hepatocellular carcinoma. International Journal of Oncology, 47, 1696-1702. https://doi.org/10.3892/ijo.2015.3180
MLA
Kurokawa, T., Murata, S., Zheng, Y., Iwasaki, K., Kohno, K., Fukunaga, K., Ohkohchi, N."The Eltrombopag antitumor effect on hepatocellular carcinoma". International Journal of Oncology 47.5 (2015): 1696-1702.
Chicago
Kurokawa, T., Murata, S., Zheng, Y., Iwasaki, K., Kohno, K., Fukunaga, K., Ohkohchi, N."The Eltrombopag antitumor effect on hepatocellular carcinoma". International Journal of Oncology 47, no. 5 (2015): 1696-1702. https://doi.org/10.3892/ijo.2015.3180
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