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Overexpression of SUMO-1 in hepatocellular carcinoma: a latent target for diagnosis and therapy of hepatoma

Journal of Cancer Research and Clinical Oncology volume 137, pages 533–541 (2011)Cite this article

Abstract

Purpose

To investigate the expression of SUMO-1 in human hepatocellular carcinoma (HCC) cell lines and clinical HCC samples.

Methods

RT–PCR and Western blot were used to detect the expressions of SUMO-1 in HCC cell lines, clinical HCC samples,and the non-neoplastic liver tissues adjacent to HCC. After transfection of SUMO-1 siRNA into HCC cell line SMMC-7721, the expression levels of Bcl-2, c-Myc and α-tubulin were examined, and MTT assay and cell cycle analysis were carried out as well.

Results

Overexpressions of SUMO-1 were detected in HCC cell lines and clinical HCC samples, while the expression level of SUMO-1 in the non-neoplastic liver tissues was significantly lower (P < 0.001). Transfection of SUMO-1 siRNA resulted in 73.43% of maximal silencing efficiency of SUMO-1 in 48 h. The expressions of Bcl-2 and c-Myc were down-regulated coincidentally. SUMO-1 siRNA notably inhibited SMMC-7721 cells proliferation in vitro and increased the ratios of G2 phase and S phase in the cells.

Conclusions

Owing to overexpression of SUMO-1 in HCC and its important role in the development of HCC, SUMO-1 could be a latent target in diagnosis and therapy of HCC.

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Acknowledgments

We thank Jiang-jing Xu and Dong Yin for their technical assistance. This work has been funded by grants from National nature science grant of China (No. 303200067, for J. Zhang) and from Department of Education of Jiangxi province, China (No. GJJ09107, for W. Guo).

Conflict of interest statement

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Affiliations

  1. Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang, China

    Wu-hua Guo

  2. Department of Gastroenterology, The Second Affiliated Hospital of Nanchang University, Nanchang, China

    Li-hua Yuan, Zhi-hua Xiao & Ji-xiang Zhang

  3. Department of Pharmacology & Molecular Therapeutics, Nanchang University School of Pharmaceutical Science, 330006, Nanchang, Jiangxi, China

    Wu-hua Guo, Li-hua Yuan, Zhi-hua Xiao, Dan Liu & Ji-xiang Zhang

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  1. Wu-hua Guo
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  2. Li-hua Yuan
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  3. Zhi-hua Xiao
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  4. Dan Liu
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  5. Ji-xiang Zhang
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Correspondence to Ji-xiang Zhang.

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Guo, Wh., Yuan, Lh., Xiao, Zh. et al. Overexpression of SUMO-1 in hepatocellular carcinoma: a latent target for diagnosis and therapy of hepatoma. J Cancer Res Clin Oncol 137, 533–541 (2011). https://doi.org/10.1007/s00432-010-0920-x

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  • DOI: https://doi.org/10.1007/s00432-010-0920-x

Keywords

  • SUMO-1
  • Hepatocellular carcinoma (HCC)
  • siRNA
  • Bcl-2 α-tubulin