Tumor Biology

, Volume 36, Issue 4, pp 2929–2936 | Cite as

A polysaccharide from mushroom Huaier retards human hepatocellular carcinoma growth, angiogenesis, and metastasis in nude mice

  • Yanmei Zou
  • Hua Xiong
  • Huihua Xiong
  • Tao Lu
  • Feng Zhu
  • Zhiyong Luo
  • Xianglin Yuan
  • Yihua Wang
Research Article

Abstract

Mushroom Huaier has become a focus of interest in the treatment of hepatocellular carcinoma (HCC). Presently, we isolated and purified one polysaccharide from this mushroom. This study aimed to investigate the effects of SP1 on tumor growth and metastasis in a HCC xenograft model and explore its possible mechanism of action. Our results showed that SP1 not only significantly inhibited the proliferation of SMMC-7721 cells in vitro at the concentration ranging from 0 to 800 μg/ml but also suppressed the HCC tumor growth and metastatic nodules to the lung in SMMC-7721-bearing mice by oral administration at three doses of 30, 60, and 120 mg/kg. Concomitantly, immunohistochemistry analysis of tumor tissues identified that SP1 administration at three doses significantly inhibited the in vivo cancer cell proliferation and microvessel density (MVD) formation, evidenced by a low proliferating cell nuclear antigen (PCNA) and CD34 expression, but increased the percentage of terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL)-positive cells. Keeping in line with this observation, SP1 treatment decreased serum matrix metalloproteinase (MMP) 2 and vascular endothelial growth factor (VEGF) levels, downregulated the protein expression of hypoxia-inducible factor (HIF)-1alpha, VEGF, MMP2, bcl-2, N-cadherin, signal transducer and activator of transcription 3 (STAT3), and metadherin (MTDH), and upregulated bax and NE-cadherin protein expression in tumor tissues. Taken together, our data suggest that SP1 appears to be a promising chemopreventive agent for the tumorigenesis and metastasis in patients with HCC, especially at advanced stages.

Keywords

Huaier purified polysaccharide Metastasis Angiogenesis 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 81201779 and No. 81101691).

Conflicts of interest

None

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2014

Authors and Affiliations

  • Yanmei Zou
    • 1
  • Hua Xiong
    • 1
  • Huihua Xiong
    • 1
  • Tao Lu
    • 2
  • Feng Zhu
    • 2
  • Zhiyong Luo
    • 3
  • Xianglin Yuan
    • 1
  • Yihua Wang
    • 4
  1. 1.Department of Oncology, Tongji Hospital, Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina
  2. 2.Department of Biochemistry and Molecular Biology, School of Basic MedicineHuazhong University of Science and TechnologyWuhanChina
  3. 3.Division of Breast and Thyroid Surgery, Tongji Hospital, Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina
  4. 4.Ludwig Institute for Cancer Research Ltd., Nuffield, Department of Clinical MedicineUniversity of OxfordOxfordUK

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