1.van den Beuken-van Everdingen MH., de Rijke JM., Kessels AG., Schouten HC., van Kleef M., Patijn J. Prevalence of pain in patients with cancer: a systematic review of the past 40 years. Ann Oncol. 2007. 18:1437–49.
2.Haumann J., Joosten EB., Everdingen MH. Pain prevalence in cancer patients: status quo or opportunities for improvement? Curr Opin Support Palliat Care. 2017.
Article
3.Candido KD., Kusper TM., Knezevic NN. New Cancer Pain Treatment Options. Curr Pain Headache Rep. 2017. 21:12.
Article
4.Vargas-Schaffer G. Is the WHO analgesic ladder still valid? Twenty-four years of experience. Can Fam Physician. 2010. 56:514–7.
5.Ma Y., Ren Z., Ma S., Yan W., He M., Wang D, et al. Morphine enhances renal cell carcinoma aggressiveness through promotes survivin level. Ren Fail. 2017. 39:258–64.
Article
6.Bimonte S., Barbieri A., Rea D., Palma G., Luciano A., Cuomo A, et al. Morphine Promotes Tumor Angiogenesis and Increases Breast Cancer Progression. Biomed Res Int. 2015. 2015:161508.
Article
7.Nguyen J., Luk K., Vang D., Soto W., Vincent L., Robiner S, et al. Morphine stimulates cancer progression and mast cell activation and impairs survival in transgenic mice with breast cancer. Br J Anaesth. 2014. 113(Suppl 1):i4–13.
Article
8.Vassou D., Notas G., Hatzoglou A., Castanas E., Kampa M. Opioids increase bladder cancer cell migration via bradykinin B2 receptors. Int J Oncol. 2011. 39:697–707.
Article
9.Farooqui M., Li Y., Rogers T., Poonawala T., Griffin RJ., Song CW, et al. COX-2 inhibitor celecoxib prevents chronic morphine-induced promotion of angiogenesis, tumour growth, metastasis and mortality, without compromising analgesia. Br J Cancer. 2007. 97:1523–31.
Article
10.Sasamura T., Nakamura S., Iida Y., Fujii H., Murata J., Saiki I, et al. Morphine analgesia suppresses tumor growth and metastasis in a mouse model of cancer pain produced by orthotopic tumor inoculation. Eur J Pharmacol. 2002. 441:185–91.
Article
11.Koodie L., Yuan H., Pumper JA., Yu H., Charboneau R., Ramkrishnan S, et al. Morphine inhibits migration of tumor-infiltrating leukocytes and suppresses angiogenesis associated with tumor growth in mice. Am J Pathol. 2014. 184:1073–84.
Article
12.Afsharimani B., Baran J., Watanabe S., Lindner D., Cabot PJ., Parat MO. Morphine and breast tumor metastasis: the role of matrix-degrading enzymes. Clin Exp Metastasis. 2014. 31:149–58.
Article
13.Li G., Low PS. Synthesis and evaluation of a ligand targeting the μ and δ opioid receptors for drug delivery to lung cancer. Bioorg Med Chem Lett. 2017. 27:2074–8.
Article
14.Lennon FE., Moss J., Singleton PA. The μ-opioid receptor in cancer progression: is there a direct effect? Anesthesiology. 2012. 116:940–5.
15.Grandhi RK., Lee S., Abd-Elsayed A. Does Opioid Use Cause Angiogenesis and Metastasis? Pain Med. 2017. 18:140–51.
Article
16.Roy S., Ninkovic J., Banerjee S., Charboneau RG., Das S., Dutta R, et al. Opioid drug abuse and modu- lation of immune function: consequences in the susceptibility to opportunistic infections. J Neuroimmune Pharmacol. 2011. 6:442–65.
17.Roy S., Wang J., Kelschenbach J., Koodie L., Martin J. Modulation of immune function by morphine: implications for susceptibility to infection. J Neuroimmune Pharmacol. 2006. 1:77–89.
Article
18.Grivennikov SI., Greten FR., Karin M. Immunity, inflammation, and cancer. Cell. 2010. 140:883–99.
Article
19.Finley MJ., Happel CM., Kaminsky DE., Rogers TJ. Opioid and nociceptin receptors regulate cyto-kine and cytokine receptor expression. Cell Immunol. 2008. 252:146–54.
Article
20.Lennon FE., Mirzapoiazova T., Mambetsariev B., Salgia R., Moss J., Singleton PA. Overexpression of the μ-opioid receptor in human non-small cell lung cancer promotes Akt and mTOR activation, tumor growth, and metastasis. Anesthesiology. 2012. 116:857–67.
Article
21.Gach K., Wyrębska A., Fichna J., Janecka A. The role of morphine in regulation of cancer cell growth. Naunyn Schmiedebergs Arch Pharmacol. 2011. 384:221–30.
Article
22.Bortsov AV., Millikan RC., Belfer I., Boortz-Marx RL., Arora H., McLean SA. μ-Opioid receptor gene A118G polymorphism predicts survival in patients with breast cancer. Anesthesiology. 2012. 116:896–902.
Article
23.Dunn GP., Old LJ., Schreiber RD. The immunobiology of cancer immunosurveillance and immunoediting. Immunity. 2004. 21:137–48.
Article
24.Carr DJ., Rogers TJ., Weber RJ. The relevance of opioids and opioid receptors on immunocompetence and immune homeostasis. Proc Soc Exp Biol Med. 1996. 213:248–57.
Article
25.Wigmore T., Farquhar-Smith P. Opioids and cancer: friend or foe? Curr Opin Support Palliat Care. 2016. 10:109–18.
26.Gong L., Dong C., Ouyang W., Qin Q. Regulatory T cells: a possible promising approach to cancer recurrence induced by morphine. Med Hypotheses. 2013. 80:308–10.
Article
27.Hua S., Cabot PJ. Mechanisms of peripheral immune-cell-mediated analgesia in inflammation: clinical and therapeutic implications. Trends Pharmacol Sci. 2010. 31:427–33.
Article
28.Yin D., Mufson RA., Wang R., Shi Y. Fas-mediated cell death promoted by opioids. Nature. 1999. 397:218.
Article
29.Hayashi T., Tsao LI., Su TP. Antiapoptotic and cytotoxic properties of delta opioid peptide [D-Ala(2),D-Leu(5)]enkephalin in PC12 cells. Synapse. 2002. 43:86–94.
Article
30.Afsharimani B., Cabot P., Parat MO. Morphine and tumor growth and metastasis. Cancer Metastasis Rev. 2011. 30:225–38.
Article
31.Hatsukari I., Hitosugi N., Ohno R., Hashimoto K., Nakamura S., Satoh K, et al. Induction of apoptosis by morphine in human tumor cell lines in vitro. Anticancer Res. 2007. 27:857–64.
32.Singleton PA., Mambetsariev N., Lennon FE., Mathew B., Siegler JH., Moreno-Vinasco L, et al. Methylnaltrexone potentiates the anti-angiogenic effects of mTOR inhibitors. J Angiogenes Res. 2010. 2:5.
Article