%0 Journal Article %T A Pharmacological Rationale to Reduce the Incidence of Opioid Induced Tolerance and Hyperalgesia: A Review %A Antonella Paladini %A Daniele Battelli %A Giustino Varrassi %A Maria Caterina Pace %A Mariella Fusco %A Panagiotis Zis %A Stefano Coaccioli %A Stephen D. Skaper %J Archive of "Pain and Therapy". %D 2018 %R 10.1007/s40122-018-0094-9 %X Beside neurons, opioid receptors (OR) are also expressed on non-neuron cells, and their distribution is altered by chronic opioid treatment. The activation of non-neuronal cells in peripheral mast cells and spinal cord microglia and astroglia induced by chronic opioid treatment causes an up-regulation of membrane receptors and abnormal production of pro-inflammatory cytokines and chemokines. These events induce sensitization of peripheral and spinal neurons, morphine tolerance and hyperalgesia, OR opioid receptor, NK1 neurokinin 1, CGRP calcitonin gene-related peptide, TRPV1 transient receptor potential vanilloid receptor 1, and PAR2 protease-activated receptor %K Chronic pain %K Opioid abuse %K Opioid induced hyperalgesia %K Opioid induced tolerance %K Opioid misuse %K PEA %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5993687/