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International Journal of Oncology
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Print ISSN: 1019-6439 Online ISSN: 1791-2423
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August 2012 Volume 41 Issue 2

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Article

Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells

  • Authors:
    • Anne-Sophie Hönicke
    • Stephan Albrecht Ender
    • Jürgen Radons
  • View Affiliations / Copyright

    Affiliations: Department of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, D-17475 Greifswald, Germany, Department of Orthopaedics and Orthopaedic Surgery, University Medicine Greifswald, D-17475 Greifswald, Germany
  • Pages: 753-758
    |
    Published online on: May 28, 2012
       https://doi.org/10.3892/ijo.2012.1498
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Abstract

Chronic inflammation represents one of the hallmarks of cancer. Of special relevance to the malignant process is the pro-inflammatory cytokine IL-1 playing a crucial role in cancer-related inflammation. Recent observations indicate increased IL-1 levels in an animal model of human osteosarcoma, the most frequent primary malignant bone tumor in man. In patients with bone sarcomas, increased serum levels of tumor-promoting cytokines, including IL-6, IL-8 and VEGF can be found, correlating with poor overall survival. The link between cancer and inflammation makes it clear that there is a need to reduce the external factors inducing inflammation as a preventive or therapeutical measure. Therefore, in the present study the effects of anti-inflammatory IL-1 receptor antagonist (IL-1Ra) was tested alone and in combination with (-)-epigallocatechin-3-gallate (EGCG), an anti-inflammatory chemopreventive agent from green tea, on the production of IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells. We found that IL-1Ra and EGCG downregulated IL-1-induced IL-6 and IL-8 release from U-2 OS cells by 65-85%. IL-1Ra and EGCG also reduced secretion of invasiveness-promoting MMP-2 and pro-angiogenic VEGF to 62-75% without affecting the metabolic response and caspase-3 activity. In conclusion, downregulation of IL-1-induced tumorigenic factors (IL-6, IL-8, VEGF, MMP-2) in U-2 OS by IL-1Ra and EGCG may positively affect tumor-associated inflammation and, as a consequence, lead to reduction in angiogenesis and invasiveness. This renders a combined administration of EGCG and IL-1Ra a promising approach as an adjuvant therapy in patients with osteosarcoma.
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Copy and paste a formatted citation
Spandidos Publications style
Hönicke A, Ender SA and Radons J: Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells. Int J Oncol 41: 753-758, 2012.
APA
Hönicke, A., Ender, S.A., & Radons, J. (2012). Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells. International Journal of Oncology, 41, 753-758. https://doi.org/10.3892/ijo.2012.1498
MLA
Hönicke, A., Ender, S. A., Radons, J."Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells". International Journal of Oncology 41.2 (2012): 753-758.
Chicago
Hönicke, A., Ender, S. A., Radons, J."Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells". International Journal of Oncology 41, no. 2 (2012): 753-758. https://doi.org/10.3892/ijo.2012.1498
Copy and paste a formatted citation
x
Spandidos Publications style
Hönicke A, Ender SA and Radons J: Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells. Int J Oncol 41: 753-758, 2012.
APA
Hönicke, A., Ender, S.A., & Radons, J. (2012). Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells. International Journal of Oncology, 41, 753-758. https://doi.org/10.3892/ijo.2012.1498
MLA
Hönicke, A., Ender, S. A., Radons, J."Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells". International Journal of Oncology 41.2 (2012): 753-758.
Chicago
Hönicke, A., Ender, S. A., Radons, J."Combined administration of EGCG and IL-1 receptor antagonist efficiently downregulates IL-1-induced tumorigenic factors in U-2 OS human osteosarcoma cells". International Journal of Oncology 41, no. 2 (2012): 753-758. https://doi.org/10.3892/ijo.2012.1498
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