The TLR4-active morphine metabolite morphine-3-glucuronide does not elicit macrophage classical activation in vitro. Khabbazi S., N. Xie, W. Pu, Y. Goumon, M.-O. Parat. Front. Pharmacol. 7:441, 2016. doi: 10.3389/fphar.2016.00441. (IF 4.418). https://www.ncbi.nlm.nih.gov/pubmed/27909407

Morphine decreases the pro-angiogenic interaction between breast cancer cells and macrophages in vitro. Khabbazi S., Z.D. Nassar, Y. Goumon, M.O. Parat. Sci. Rep. 6, 31572, 2016 doi: 10.1038/srep31572 (IF 5.2287). https://www.ncbi.nlm.nih.gov/pubmed/27514308