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Opioid hyperalgesia

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https://www.readbyqxmd.com/read/29776484/corticotropin-releasing-factor-in-the-brain-and-blocking-spinal-descending-signals-induce-hyperalgesia-in-the-latent-sensitization-model-of-chronic-pain
#1
Wenling Chen, Yvette Taché, Juan Carlos Marvizón
Latent sensitization is a model of chronic pain in which an injury triggers a period of hyperalgesia followed by an apparent recovery, but in which pain sensitization persists but is suppressed by opioid and adrenergic receptors. One important characteristic of latent sensitization is that hyperalgesia can be triggered by acute stress. To determine whether the effect of stress is mimicked by the activation of corticotropin-releasing factor (CRF) signaling in the brain, rats with latent sensitization induced by injecting complete Freund's adjuvant (CFA, 50 μl) in one hind paw were given an intracerebroventricular (i...
June 15, 2018: Neuroscience
https://www.readbyqxmd.com/read/29762151/comparison-of-the-peripheral-antinociceptive-effect-of-somatostatin-with-bupivacaine-and-morphine-in-the-rodent-postoperative-pain-model
#2
Rahul Kumar, Mayank Gautam, Pranav Prasoon, Shivani Gupta, Subrata Basu Ray
BACKGROUND AND OBJECTIVES: Infiltration of surgical wound with local anaesthetics attenuate postoperative pain. However, side effects can also occur. Somatostatin (SST) and its analogues like octreotide reportedly reduce peripheral sensitisation. The current study evaluates peripherally mediated antinociceptive effect of SST in a rat model of postoperative pain. This was compared with bupivacaine and morphine under identical experimental conditions. DESIGN: Randomised vehicle-controlled blind study...
May 11, 2018: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29743920/electroacupuncture-alleviates-pain-responses-and-inflammation-in-a-rat-model-of-acute-gout-arthritis
#3
Wenxin Chai, Yan Tai, Xiaomei Shao, Yi Liang, Guo-Qing Zheng, Ping Wang, Jianqiao Fang, Boyi Liu
Acute gout arthritis is one of the most painful inflammatory conditions. Treatments for gout pain are limited to colchicine, nonsteroidal anti-inflammatory drugs, and corticosteroids, which oftentimes result in severe adverse effects. Electroacupuncture (EA) has been proved to be effective in relieving many inflammatory pain conditions with few side effects. Here, we aim to investigate the therapeutic potentials of EA on pain and inflammation of a rat model of acute gout arthritis and underlying mechanisms...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29739543/special-indications-for-opioid-free-anaesthesia-and-analgesia-patient-and-procedure-related-including-obesity-sleep-apnoea-chronic-obstructive-pulmonary-disease-complex-regional-pain-syndromes-opioid-addiction-and-cancer-surgery
#4
REVIEW
Adrian Sultana, David Torres, Roman Schumann
Opioid-free anaesthesia (OFA) is a technique where no intraoperative systemic, neuraxial or intracavitary opioid is administered with the anaesthetic. Opioid-free analgesia similarly avoids opioids in the perioperative period. There are many compelling reasons to avoid opioids in the surgical population. A number of case reports and, increasingly, prospective studies from all over the world support its benefits, especially in the morbidly obese population with or without sleep apnoea. A derivative technique is opioid sparing, where the same techniques are used but some opioid use is allowed...
December 2017: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/29739537/opioid-free-anesthesia-opioid-side-effects-tolerance-and-hyperalgesia
#5
REVIEW
Patricia Lavand'homme, Arnaud Steyaert
Opioids are the most potent drugs used to control severe pain. However, neuroadaptation prevents opioids' ability to provide long-term analgesia and produces opposite effects, i.e., enhancement of existent pain and facilitation of chronic pain development. Neuroadaptation to opioids use results in the development of two interrelated phenomena: tolerance and "opioid-induced hyperalgesia" (OIH). Tolerance, a pharmacologic concept, and OIH, a clinical syndrome, have been mostly observed under experimental conditions in animals and in human volunteers...
December 2017: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/29727163/aminoguanidine-hydrazone-derivatives-as-non-peptide-npff1-receptor-antagonists-reverse-opioid-induced-hyperalgesia
#6
Hassan Hammoud, Khadija Elhabazi, Raphaëlle Quillet, Isabelle Bertin, Valérie Utard, Emilie Laboureyras, Jean-Jacques Bourguignon, Frederic Bihel, Guy Simonnet, Frederic Simonin, Martine Schmitt
Neuropeptide FF receptors (NPFF1R and NPFF2R) and their endogenous ligand Neuropeptide FF have been shown previously to display anti-opioid properties and to play a critical role in the adverse effects associated with chronic administrations of opiates including the development of opioid-induced hyperalgesia and analgesic tolerance. In this work, we sought to identify novel NPFF receptors ligands by focusing our interest on a series of heterocycles as rigidified non-peptide NPFF receptor ligands, starting from already described aminoguanidine hydrazones (AGH's)...
May 4, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29726847/opioid-induced-hyperalgesia-in-the-nonsurgical-setting-a-systematic-review
#7
David Z Yang, Billy Sin, Joshua Beckhusen, Dawei Xia, Rebecca Khaimova, Ilia Iliev
BACKGROUND: Opioid-induced hyperalgesia (OIH) is a phenomenon that causes an increased pain sensitization and perception of pain to noxious stimuli secondary to opioid exposure. While this clinical effect has been described in the surgical setting, it is unclear if OIH occurs in the nonsurgical setting. STUDY QUESTION: To review the available literature which evaluated OIH in nonsurgical settings. DATA SOURCES: A comprehensive literature search was performed using PubMed (January 1946-July 2017) using a variety of keywords for OIH...
January 31, 2018: American Journal of Therapeutics
https://www.readbyqxmd.com/read/29708942/a-bifunctional-biased-mu-opioid-agonist-neuropeptide-ff-receptor-antagonist-as-analgesic-with-improved-acute-and-chronic-side-effects
#8
Armand Drieu la Rochelle, Karel Guillemyn, Maria Dumitrascuta, Charlotte Martin, Valérie Utard, Raphaëlle Quillet, Séverine Schneider, François Daubeuf, Tom Willemse, Pieter Mampuys, Bert U W Maes, Nelly Frossard, Frédéric Bihel, Mariana Spetea, Frédéric Simonin, Steven Ballet
Opioid analgesics, such as morphine, oxycodone and fentanyl, are the cornerstones for treating moderate to severe pain. However, upon chronic administration, their efficiency is limited by prominent side effects such as analgesic tolerance and dependence liability. Neuropeptide FF (NPFF) and its receptors (NPFF1R and NPFF2R) are recognized as an important pronociceptive system involved in opioid-induced hyperalgesia and analgesic tolerance. Herein, we report the design of multitarget peptidomimetic compounds that show high affinity binding to the mu opioid receptor (MOPr) and NPFFRs...
April 26, 2018: Pain
https://www.readbyqxmd.com/read/29700767/effects-of-post-weaning-chronic-stress-on-nociception-spinal-cord-%C3%AE-opioid-and-%C3%AE-2-adrenergic-receptors-expression-in-rats-and-their-offspring
#9
Asef Hormozi, Asadollah Zarifkar, Mohsen Tatar, Mahdi Barazesh, Bahar Rostami
Stressful situations can change biological process in human and animal, and some of these changes may transfer to the next generations. We used a communication box to induce chronic electrical foot-shock stress in rats. Tail flick latency and formalin test were done to determine the level of pain sensation. Real-time RT-PCR was used to measure the level of spinal cord μ-opioid (MOR) and α2-adrenergic receptors (α2-AR) mRNA. We demonstrate that chronic stress can change nociception and leads to hyperalgesia...
April 26, 2018: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/29677019/mu-opioid-receptors-in-nociceptive-afferents-produce-a-sustained-suppression-of-hyperalgesia-in-chronic-pain
#10
Amie Severino, Wenling Chen, Joshua K Hakimian, Brigitte L Kieffer, Claire Gaveriaux-Ruff, Wendy Walwyn, Juan Carlos Marvizon
The latent sensitization model of chronic pain reveals that recovery from some types of long-term hyperalgesia is an altered state in which nociceptive sensitization persists but is suppressed by the ongoing activity of analgesic receptors such as µ-opioid receptors (MORs). To determine whether these MORs are the ones present in nociceptive afferents, we bred mice expressing Cre-recombinase under the Nav1.8 channel promoter (Nav1.8cre) with MOR-floxed mice (flMOR). These Nav1.8cre/flMOR mice had reduced MOR expression in primary afferents, as revealed by quantitative PCR, in situ hybridization and immunofluorescence colocalization with the neuropeptide CGRP...
April 17, 2018: Pain
https://www.readbyqxmd.com/read/29676223/opiate-free-tricuspid-valve-replacement-case-report
#11
Jeffrey P Cardinale, George Gilly
The utility of opioid pain medications for perioperative analgesia is well described. However, opioids have many dangerous side effects including respiratory depression, acute tolerance, hyperalgesia, and chronic opioid dependence. Multimodal approaches continue to be used in more invasive and complex surgical procedures for enhanced recovery and decreased postoperative complications from opioid administration. The current case report centers on a 30-year-old male recovering from opioid addiction presenting with severe tricuspid regurgitation scheduled to undergo a tricuspid valve replacement...
April 1, 2018: Seminars in Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29670398/remifentanil-induced-postoperative-hyperalgesia-current-perspectives-on-mechanisms-and-therapeutic-strategies
#12
REVIEW
Cristina Santonocito, Alberto Noto, Claudia Crimi, Filippo Sanfilippo
The use of remifentanil in clinical practice offers several advantages and it is used for a wide range of procedures, ranging from day-surgery anesthesia to more complex procedures. Nonetheless, remifentanil has been consistently linked with development of opioid-induced hyperalgesia (OIH), which is described as a paradoxical increase in sensitivity to painful stimuli that develops after exposure to opioid treatment. The development of OIH may cause several issues, delaying recovery after surgery and preventing timely patient's discharge...
2018: Local and Regional Anesthesia
https://www.readbyqxmd.com/read/29662325/sonic-hedgehog-signaling-in-spinal-cord-contributes-to-morphine-induced-hyperalgesia-and-tolerance-through-upregulating-brain-derived-neurotrophic-factor-expression
#13
Su Liu, Jun-Li Yao, Xin-Xin Wan, Zhi-Jing Song, Shuai Miao, Ye Zhao, Xiu-Li Wang, Yue-Peng Liu
Purpose: Preventing opioid-induced hyperalgesia and tolerance continues to be a major clinical challenge, and the underlying mechanisms of hyperalgesia and tolerance remain elusive. Here, we investigated the role of sonic hedgehog (Shh) signaling in opioid-induced hyperalgesia and tolerance. Methods: Shh signaling expression, behavioral changes, and neurochemical alterations induced by morphine were analyzed in male adult CD-1 mice with repeated administration of morphine...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29651005/differential-effect-of-morphine-on-gastrointestinal-transit-colonic-contractions-and-nerve-evoked-relaxations-in-toll-like-receptor-deficient-mice
#14
Elizabeth A H Beckett, Vasiliki Staikopoulos, Mark R Hutchinson
Toll-like receptors (TLRs) are expressed in enteric neurons, glia, gastrointestinal (GI) smooth muscle and mucosa, yet their functional roles in the GI tract are not fully understood. TLRs have been linked to many of the undesirable central effects of chronic opioid administration including hyperalgesia and dependence via activation of central microglia. Opioid-induced bowel dysfunction (OIBD) remains a primary reason for the reduction or withdrawal of opioid analgesics. Morphine-induced inhibition of colonic motility was assessed in vivo by GI transit studies and in vitro using isolated colons from wildtype (WT) and TLR deficient mice...
April 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29608897/uses-of-fluoxetine-in-nociceptive-pain-management-a-literature-overview
#15
REVIEW
Ahmed Barakat, Mostafa M Hamdy, Mohamed M Elbadr
Fluoxetine is one of the top ten prescribed antidepressants. Other therapeutic applications were approved for fluoxetine including, anxiety disorders, bulimia nervosa, and premature ejaculation. However, the role of fluoxetine in nociceptive pain management is still unclear. In this review, we discuss an overview of five possible roles of fluoxetine in pain management: intrinsic antinociceptive effect, enhancement of acute opioid analgesia, attenuation of tolerance development to opioid analgesia, attenuation of dependence development and abstinence syndrome, and attenuation of opioid induced hyperalgesia...
March 30, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29596152/upregulation-of-p2x2-and-p2x3-receptors-in-rats-with-hyperalgesia-induced-by-heroin-withdrawal
#16
Changlong Leng, Lin Chen, Xiaokang Gong, Baomiao Ma, Weimin Gan, Yuanren Si, Huaqiao Xiao, Chaoying Li
Drug dependence and withdrawal syndrome induced by abrupt cessation of opioid administration remain a severe obstacle in the clinical treatment of chronic pain and opioid drug addiction. One of the key symptoms during opioid withdrawal is hyperalgesia. The mechanism of opioid withdrawal-induced hyperalgesia remains unclear. P2X2 and P2X3 receptors, members of P2X receptor subunits, act as the integrator of multiple forms of noxious stimuli and play an important role in nociception transduction of chronic neuropathic and inflammatory pain...
March 28, 2018: Neuroreport
https://www.readbyqxmd.com/read/29594972/a-pharmacological-rationale-to-reduce-the-incidence-of-opioid-induced-tolerance-and-hyperalgesia-a-review
#17
REVIEW
Giustino Varrassi, Mariella Fusco, Stephen D Skaper, Daniele Battelli, Panagiotis Zis, Stefano Coaccioli, Maria Caterina Pace, Antonella Paladini
Chronic pain is an important health and social problem. Misuse and abuse of opioids in chronic non-cancer pain management seem to be a huge problem, in some countries. This could probably affect the normal use of such analgesics in patients in need of them. Basic and clinical researches should find the solution to mitigate the potential damage. Dysregulation of mast cell and microglia activation plays an important role in the pathogenesis and management of chronic pain. Persistent mast cell activation sensitizes nociceptors and initiates central nervous system inflammatory processes, involving microglial cell activation and sensitization of spinal somatosensory neurons...
March 28, 2018: Pain and Therapy
https://www.readbyqxmd.com/read/29582417/dissecting-the-spinal-nop-receptor-distribution-under-a-chronic-pain-model-using-nop-egfp-knock-in-mice
#18
Akihiko Ozawa, Gloria Brunori, Andrea Cippitelli, Nicholas Toll, Jennifer Schoch, Brigitte L Kieffer, Lawrence Toll
BACKGROUND AND PURPOSE: The Nociceptin/orphanin FQ Opioid Peptide (NOP) receptor system plays a significant role in the regulation of pain, and functions differently in the spinal cord and brain. The mechanism by which the NOP receptor agonists regulate pain transmission in these regions is not clearly understood. Here we investigate the peripheral and spinal NOP receptor distribution and antinociceptive effects of intrathecally (i.t) administered nociceptin/orphanin FQ (N/OFQ) under chronic neuropathic pain state...
March 26, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29581750/%C3%AE-endorphin-attenuates-collagen-induced-arthritis-partially-by-inhibiting-peripheral-pro-inflammatory-mediators
#19
Xiaofen He, Lei Huang, Shenchen Qiu, Xiaohu Yin, Yafang Shen, Yuanyuan Wu, Yongliang Jiang, Jianqiao Fang
The classical analgesic pathway of opioids by binding their receptors in the nervous system is well known. However, little is known regarding opioid analgesia through the anti-inflammatory pathway. The present study aimed to investigate the analgesic and anti-inflammatory effect of β-endorphin on inflammatory pain. A rat model of collagen-induced arthritis (CIA) was generated by intradermal injection of bovine type II collagen. Rats were divided into the CIA + saline group and the CIA + β-endorphin group, in which rats were intraperitoneally injected with β-endorphin once every other day from day 18 following the injection of CII until day 28...
April 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29578946/the-bivalent-ligand-mcc22-potently-attenuates-nociception-in-a-murine-model-of-sickle-cell-disease
#20
Giuseppe Cataldo, Mary M Lunzer, Julie K Olson, Eyup Akgün, John D Belcher, Gregory M Vercellotti, Philip S Portoghese, Donald A Simone
Sickle cell disease (SCD) is a chronic inflammatory disorder accompanied by chronic pain. In addition to ongoing pain and hyperalgesia, vaso-occlusive crises-induced pain can be chronic or episodic. Since analgesics typically used to treat pain are not very effective in SCD, opioids, including morphine, are a primary treatment for managing pain in SCD but are associated with many serious side effects, including constipation, tolerance, addiction, and respiratory depression. Thus, there is a need for the development of novel treatments for pain in SCD...
March 22, 2018: Pain
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