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Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study

  • Authors:
    • Jun‑Ying Du
    • Yi Liang
    • Jun‑Fan Fang
    • Yong‑Liang Jiang
    • Xiao‑Mei Shao
    • Xiao‑Fen He
    • Jian‑Qiao Fang
  • View Affiliations / Copyright

    Affiliations: Department of Neurobiology and Acupuncture Research, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
    Copyright: © Du et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2568-2576
    |
    Published online on: September 1, 2016
       https://doi.org/10.3892/etm.2016.3647
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Abstract

Exogenous and endogenous opioids have been shown to modulate the immune system. Morphine-induced immunosuppression has been investigated extensively. However, the immune‑regulating function of endogenous opioid peptides is unclear. The present study aimed to evaluate the difference in effects on cellular immune function between recombinant rat β‑endorphin (β-EP; 50 µg/kg) and plant source morphine (10 mg/kg) via intraperitoneal injection treatment in a rat model of bone cancer pain. Walker 256 cells were injected into a tibial cavity injection to establish the bone cancer pain model. The paw withdrawal thresholds and body weights were measured prior to surgery, at 6 days after surgery, and following 1, 3,6 and 8 treatments. The spleen cells were harvested for detection of T cell proliferation, natural killer (NK) cell cytotoxicity, and the relative quantities of T cell subtypes (CD3+, CD4+ and CD8+ cells). Plasma levels of interleukin‑2 (IL‑2) were also determined. It was found that single or multiple treatments with β‑EP (a homogenous opioid peptide) and morphine (a heterogenous opioid) had good analgesic effects on bone cancer pain, while the analgesia provided by morphine was stronger than that of β‑EP. Treatment with β‑EP 3, 6 and 8 times increased the body weight gain in the rat model of bone cancer pain, while morphine treatment had on effect on it. With regard to immunomodulatory functions, β‑EP treatment increased T cell proliferation and NK cell cytotoxicity, and increased the relative quantities of T cell subtypes, but no effect on T cell secretion. However, morphine treatment decreased T cell proliferation and the levels of T cell subtypes. These data indicate that opioids from different sources have different effects on cellular immune function in vivo. A small dose of homogenous opioid peptide exhibited positive effects (analgesia and immune enhancement) on cancer pain. These results provide experimental evidence supporting the exploitation of human opioids for the treatment of cancer pain.
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Copy and paste a formatted citation
Spandidos Publications style
Du JY, Liang Y, Fang JF, Jiang YL, Shao XM, He XF and Fang JQ: Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study. Exp Ther Med 12: 2568-2576, 2016.
APA
Du, J., Liang, Y., Fang, J., Jiang, Y., Shao, X., He, X., & Fang, J. (2016). Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study. Experimental and Therapeutic Medicine, 12, 2568-2576. https://doi.org/10.3892/etm.2016.3647
MLA
Du, J., Liang, Y., Fang, J., Jiang, Y., Shao, X., He, X., Fang, J."Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study". Experimental and Therapeutic Medicine 12.4 (2016): 2568-2576.
Chicago
Du, J., Liang, Y., Fang, J., Jiang, Y., Shao, X., He, X., Fang, J."Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study". Experimental and Therapeutic Medicine 12, no. 4 (2016): 2568-2576. https://doi.org/10.3892/etm.2016.3647
Copy and paste a formatted citation
x
Spandidos Publications style
Du JY, Liang Y, Fang JF, Jiang YL, Shao XM, He XF and Fang JQ: Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study. Exp Ther Med 12: 2568-2576, 2016.
APA
Du, J., Liang, Y., Fang, J., Jiang, Y., Shao, X., He, X., & Fang, J. (2016). Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study. Experimental and Therapeutic Medicine, 12, 2568-2576. https://doi.org/10.3892/etm.2016.3647
MLA
Du, J., Liang, Y., Fang, J., Jiang, Y., Shao, X., He, X., Fang, J."Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study". Experimental and Therapeutic Medicine 12.4 (2016): 2568-2576.
Chicago
Du, J., Liang, Y., Fang, J., Jiang, Y., Shao, X., He, X., Fang, J."Effect of systemic injection of heterogenous and homogenous opioids on peripheral cellular immune response in rats with bone cancer pain: A comparative study". Experimental and Therapeutic Medicine 12, no. 4 (2016): 2568-2576. https://doi.org/10.3892/etm.2016.3647
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