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Opioid induced hyperalgesia

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https://www.readbyqxmd.com/read/28627589/effect-of-the-spinal-apelin%C3%A2-apj-system-on-the-pathogenesis-of-chronic-constriction-injury%C3%A2-induced-neuropathic-pain-in-rats
#1
Qingming Xiong, Wanyou He, Hanbing Wang, Jun Zhou, Yajun Zhang, Jian He, Chengxiang Yang, Bin Zhang
Apelin is hypothesized to serve a dual function in pain processing. Spinal administration of apelin induces hyperalgesia, while opioid receptors are implicated in the antinociceptive effects of apelin in acute nociceptive models. However, whether the apelin‑apelin receptor (APJ) system is involved in neuropathic pain remains to be elucidated. The present study aimed to evaluate the impact and mechanism of the spinal apelin‑APJ system in neuropathic pain. Chronic constriction injury (CCI) of the sciatic nerve produced sustained spinal apelin and APJ upregulation, which was associated with mechanical allodynia and heat hyperalgesia development in the hind‑paw plantar surface...
June 9, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28621702/short-duration-physical-activity-prevents-the-development-of-activity-induced-hyperalgesia-through-opioid-and-serotoninergic-mechanisms
#2
Lucas V Lima, Josimari M DeSantana, Lynn A Rasmussen, Kathleen A Sluka, Lucas Vasconcelos Lima
Regular physical activity prevents development of chronic muscle pain through modulation of central mechanisms that involve rostral ventromedial medulla (RVM). We tested if pharmacological blockade or genetic deletion of mu-opioid receptors in physically active mice modulates excitatory and inhibitory systems in the RVM in an activity-induced hyperalgesia model. We examined response frequency to mechanical stimulation of the paw, muscle withdrawal thresholds, and expression of phosphorylation of the NR1 subunit of the NMDA receptor (p-NR1) and serotonin transporter (SERT) in the RVM...
June 8, 2017: Pain
https://www.readbyqxmd.com/read/28616391/opioid-free-anaesthesia-in-three-dogs
#3
Donna M White, Alastair R Mair, Fernando Martinez-Taboada
Opioid-free anaesthesia (OFA) is a relatively new and growing field in human medicine. There are multiple motivations behind this emerging practice with the recognition of several serious potential opioid-related adverse effects including opioid induced hyperalgesia, opioid tolerance and immunomodulatory effects of opioids. Opioids have long been the mainstay of veterinary anaesthesia and pain management practice. The feasibility of OFA in veterinary patients is presented here. A case series of three dogs that underwent OFA for canine ovariohysterectomy is reported...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/28599683/pain-sensitivity-and-analgesic-use-among-10-486-adults-the-troms%C3%A3-study
#4
Per-Jostein Samuelsen, Christopher Sivert Nielsen, Tom Wilsgaard, Audun Stubhaug, Kristian Svendsen, Anne Elise Eggen
BACKGROUND: Increased pain sensitivity is a putative risk factor for chronic pain and consequently for analgesic use. Conversely, analgesic use may be a cause of increased pain sensitivity, e.g., through opioid-induced hyperalgesia. We aimed to study the association between pain sensitivity and analgesic use in a general population, and to test the hypothesis that increased baseline pain sensitivity is a risk factor for future persistent analgesic use. METHODS: The Tromsø Study (2007-08), a population-based health study, was linked with eight years of prescription data from the Norwegian Prescription Database...
June 9, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28590258/opioid-induced-hyperalgesia-in-clinical-anesthesia-practice-what-has-remained-from-theoretical-concepts-and-experimental-studies
#5
Lena Weber, David C Yeomans, Alexander Tzabazis
PURPOSE OF REVIEW: This article reviews the phenomenon of opioid-induced hyperalgesia (OIH) and its implications for clinical anesthesia. The goal of this review is to give an update on perioperative prevention and treatment strategies, based on findings in preclinical and clinical research. RECENT FINDINGS: Several systems have been suggested to be involved in the pathophysiology of OIH with a focus on the glutaminergic system. Very recently preclinical data revealed that peripheral μ-opioid receptors (MORs) are key players in the development of OIH and acute opioid tolerance (AOT)...
June 5, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28535569/reinstituting-the-bolus-new-reasoning-for-an-existing-technique
#6
Porter W McRoberts, Jason E Pope, Catalina Apostol
Improved intrathecal (IT) pump technology is increasing the accuracy of IT opioid bolus dosing and promising advances in pain therapy. Opioid bolus dosing can be used with a minimal continuous infusion or it can function as the sole therapy. Bolus-only dosing is characterized by minimal use of opioid (often less than 1 mg of IT morphine). It achieves adequate pain control while reducing tolerance and possibly opioid-induced hyperalgesia. It may prevent receptor saturation, and provide a "washing out" of the opioid receptor that prevents the observed dose escalation resulting from continuous infusions...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28533287/trv0109101-a-g-protein-biased-agonist-of-the-%C3%A2%C2%B5-opioid-receptor-does-not-promote-opioid-induced-mechanical-allodynia-following-chronic-administration
#7
Michael Koblish, Richard Carr, Edward R Siuda, David H Rominger, William Gowen-MacDonald, Conrad L Cowan, Aimee L Crombie, Jonathan D Violin, Michael W Lark
Prescription opioids are a mainstay in the treatment of acute moderate to severe pain. However, chronic use leads to a host of adverse consequences including tolerance and opioid-induced hyperalgesia (OIH), leading to more complex treatment regimens and diminished patient compliance. Patients experiencing OIH paradoxically experience exaggerated nociceptive responses instead of pain reduction after chronic opioid usage. The development of OIH and tolerance tend to occur simultaneously and, thus, present a challenge when studying the molecular mechanisms driving each phenomenon...
May 22, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28524890/opioid-induced-hyperalgesia-clinical-implications-for-advanced-practice-nurses-in-oncology
#8
Ann Guastella, Jessica Latchman, Cindy S Tofthagen
Opioid-induced hyperalgesia (OIH) is a key factor in the clinical management of patients experiencing pain. However, limited knowledge exists regarding the specific mechanisms involved in OIH and its treatment. A thorough assessment is usually required, and clinical diagnosis is mainly determined by exclusion in medical practice. Patients who are taking opioids should receive ongoing, comprehensive assessment by a clinician. Early identification of OIH will lead to improved patient outcomes.
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June 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/28508104/quercetin-inhibits-gout-arthritis-in-mice-induction-of-an-opioid-dependent-regulation-of-inflammasome
#9
Kenji W Ruiz-Miyazawa, Larissa Staurengo-Ferrari, Sandra S Mizokami, Talita P Domiciano, Fabiana T M C Vicentini, Doumit Camilios-Neto, Wander R Pavanelli, Phileno Pinge-Filho, Flávio A Amaral, Mauro M Teixeira, Rubia Casagrande, Waldiceu A Verri
We investigated the anti-inflammatory and analgesic effects of quercetin in monosodium urate crystals (MSU)-induced gout arthritis, and the sensitivity of quercetin effects to naloxone, an opioid receptor antagonist. Mice were treated with quercetin, and mechanical hyperalgesia was assessed at 1-24 h after MSU injection. In vivo, leukocyte recruitment, cytokine levels, oxidative stress, NFκB activation, and gp91(phox) and inflammasome components (NLRP3, ASC, Pro-caspase-1, and Pro-IL-1β) mRNA expression by qPCR were determined in the knee joints at 24 h after MSU injection...
May 15, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28489932/camkii%C3%AE-may-modulate-fentanyl-induced-hyperalgesia-via-a-celc-pag-rvm-spinal-cord-descending-facilitative-pain-pathway-in-rats
#10
Zhen Li, Pingping Yin, Jian Chen, Shenglan Jin, Jieqiong Liu, Fang Luo
Each of the lateral capsular division of central nucleus of amygdala(CeLC), periaqueductal gray (PAG), rostral ventromedial medulla(RVM) and spinal cord has been proved to contribute to the development of opioid-induced hyperalgesia(OIH). Especially, Ca2+/calmodulin-dependent protein kinase IIα (CaMKIIα) in CeLC and spinal cord seems to play a key role in OIH modulation. However, the pain pathway through which CaMKIIα modulates OIH is not clear. The pathway from CeLC to spinal cord for this modulation was explored in the present study...
2017: PloS One
https://www.readbyqxmd.com/read/28440280/targeting-asic3-for-relieving-mice-fibromyalgia-pain-roles-of-electroacupuncture-opioid-and-adenosine
#11
Liang-Ta Yen, Ching-Liang Hsieh, Hsin-Cheng Hsu, Yi-Wen Lin
Many scientists are seeking better therapies for treating fibromyalgia (FM) pain. We used a mouse model of FM to determine if ASIC3 and its relevant signaling pathway participated in FM pain. We demonstrated that FM-induced mechanical hyperalgesia was attenuated by electroacupuncture (EA). The decrease in fatigue-induced lower motor function in FM mice was also reversed by EA. These EA-based effects were abolished by the opioid receptor antagonist naloxone and the adenosine A1 receptor antagonist rolofylline...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28434951/role-of-crf1-receptor-in-post-incisional-plasma-extravasation-and-nociceptive-responses-in-mice
#12
Asunción Romero, Juan-Antonio García-Carmona, María-Luisa Laorden, Margarita M Puig
The corticotropin-releasing factor (CRF) is involved in a number of physiological functions including pain perception. The purpose of this study was to evaluate the role of CRF1 receptor in the long-lasting post-surgical changes in somatic nociceptive thresholds and in local inflammatory responses, using genetically engineered mice lacking functional CRF1 receptor. Animals underwent a plantar incision under anaesthesia with remifentanil (80μg/kg s.c.) and sevoflurane. Mechanical thresholds (von Frey) and plasma extravasation (Evan's blue) were evaluated at different time points...
April 20, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28397700/narcotic-bowel-syndrome
#13
REVIEW
Adam D Farmer, Jayne Gallagher, Caroline Bruckner-Holt, Qasim Aziz
Narcotic bowel syndrome is characterised by worsening abdominal pain in the context of escalating or continuous opioid therapy. Although narcotic bowel syndrome is rarely diagnosed, given the current epidemic of opioid use, it is likely to be under-recognised. The underlying pathophysiological mechanisms of narcotic bowel syndrome are incompletely understood; however, opioid-induced hyperalgesia is likely to be a central facet. The putative mechanisms of hyperalgesia include activation of bimodal opioid regulatory systems, counter-regulatory mechanisms, neuroinflammation, opioid facilitation, and interactions of the N-methyl D-aspartate receptor with opioids at the level of the spinal cord...
May 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28386402/opioid-induced-myoclonus-and-hyperalgesia-following-a-short-course-of-low-dose-oral-morphine
#14
Owen Bleddyn Woodward, Sangeeta Naraen, Akriti Naraen
A 76-year-old man was admitted to hospital with a right-sided fractured neck of femur requiring repair via a cemented hemiarthroplasty. Intraoperatively he received 10 mg of intravenous morphine. Post-operatively he received a short course of low-dose oral opioids and subsequently developed myoclonic jerks and hyperalgesia. The opioids were discontinued and both adverse effects resolved. This case report discusses the concurrent development of myoclonus and hyperalgesia following a low dose of opioids and explores possible management options...
February 2017: British Journal of Pain
https://www.readbyqxmd.com/read/28365208/postoperative-hyperalgesia-a-clinically-applicable-narrative-review
#15
REVIEW
Avi A Weinbroum
Postoperative hyperalgesia (POH) is a condition characterized by signs and symptoms of pain despite the provision of conventional analgesia. In most cases, anesthesiologists are called upon soon after surgery, but occasionally it may occur as a late event. Persistent uncontrolled pain may transform into chronic or neuropathic pain. Correct diagnosis of POH is essential since similar phenomenon may exacerbate if misdiagnosed, while proper treatment is frequently achievable by pharmacological remedies. This review will describe the causes for POH and its bio-neuro-pharmacological basis, and clinical symptoms and signs directing the physician towards correct diagnosis of this paradoxical condition of pain, as well as modes capable of preventing POH from occurring...
June 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28361126/pressure-sensitivity-and-phenotypic-changes-in-patients-with-suspected-opioid-induced-hyperalgesia-being-withdrawn-from-full-mu-agonists
#16
Ronald A Wasserman, Afton L Hassett, Steven E Harte, Jenna Goesling, Herbert L Malinoff, Daniel W Berland, Jennifer Zollars, Stephanie E Moser, Chad M Brummett
OBJECTIVES: To assess changes in phenotype and pressure sensitivity in patients with suspected opioid-induced-hyperalgesia (OIH) after transitioning to buprenorphine. METHODS: Twenty patients with suspected OIH were enrolled to transition to buprenorphine therapy. Patients completed validated self-report measures at baseline and at 1, 4, 8 weeks, and 6 months after initiation of buprenorphine along with quantitative sensory testing including measures of pressure pain threshold, pain tolerance and Pain 50 (a pain intensity rating)...
February 2017: Journal of Nature and Science
https://www.readbyqxmd.com/read/28352316/monocyte-chemoattractant-protein-1-contributes-to-morphine-tolerance-in-rats-with-cancer-induced-bone-pain
#17
Lei Liu, Xiu-Juan Gao, Chun-Guang Ren, Ji-Hua Hu, Xian-Wen Liu, Ping Zhang, Zong-Wang Zhang, Zhi-Jian Fu
Cancer-induced bone pain can severely compromise the life quality of patients, while tolerance limits the use of opioids in the treatment of cancer pain. Monocyte chemoattractant protein-1 (MCP-1) is known to contribute to neuropathic pain. However, the role of spinal MCP-1 in the development of morphine tolerance in patients with cancer-induced bone pain remains unclear. The aim of the present study was to investigate the role of spinal MCP-1 in morphine tolerance in bone cancer pain rats (MTBP rats). Bone cancer pain was induced by intramedullary injection of Walker 256 cells into the tibia of the rats, while morphine tolerance was induced by continuous intrathecal injection of morphine over a period of 9 days...
February 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28343361/genetic-dissociation-of-morphine-analgesia-from-hyperalgesia-in-mice
#18
Gina F Marrone, Valerie Le Rouzic, Andras Varadi, Jin Xu, Anjali M Rajadhyaksha, Susruta Majumdar, Ying-Xian Pan, Gavril W Pasternak
RATIONALE: Morphine is the prototypic mu opioid, producing its analgesic actions through traditional 7 transmembrane domain (7TM) G-protein-coupled receptors generated by the mu opioid receptor gene (Oprm1). However, the Oprm1 gene undergoes extensive alternative splicing to yield three structurally distinct sets of splice variants. In addition to the full-length 7TM receptors, it produces a set of truncated variants comprised of only 6 transmembrane domains (6TM). OBJECTIVES: This study explored the relative contributions of 7TM and 6TM variants in a range of morphine actions...
March 25, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28341079/monitoring-of-nociception-reality-or-fiction
#19
A Abad-Gurumeta, J Ripollés-Melchor, R Casans-Francés, J M Calvo-Vecino
There are currently various projects underway that attempt to monitor the nociceptive responses caused by surgical stress and ensure patients the best analgesic conditions. The systemic response to surgical stress has repercussions in the postoperative period, such as worse pain control, delayed recovery, greater complications, longer stay in resuscitation and hospital units, and increased healthcare costs. However, treatment with higher doses of opioids than necessary may lead to slower awakening, increased drowsiness and adverse effects, as well as situations of postoperative opioid-induced hyperalgesia...
March 21, 2017: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/28340258/hydrocodone-is-more-effective-than-morphine-or-oxycodone-in-suppressing-the-development-of-burn-induced-mechanical-allodynia
#20
Michael A Emery, M L Shawn Bates, Paul J Wellman, Shoshana Eitan
Background. : Pain is the most frequent complaint of burn-injured patients. Opioids are commonly used in the course of treatment. However, there is a lack of rodent studies that examine the differential effects of various opioids on burn pain. Objective. : This study compared the ability of morphine, oxycodone, and hydrocodone to suppress the development of burn-induced mechanical allodynia and reduce pain sensitivity. Methods. : Mice were examined for their baseline pain sensitivity thresholds using the von Frey Filaments test...
March 18, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
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