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Opioid Induces Hyperalgesia

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https://www.readbyqxmd.com/read/28806222/transient-receptor-potential-vanilloid-1-antagonists-prevent-anesthesia-induced-hypothermia-and-decrease-postincisional-opioid-dose-requirements-in-rodents
#1
Andras Garami, Mohab Ibrahim, Kerry Gilbraith, Rajesh Khanna, Eszter Pakai, Alexandra Miko, Erika Pinter, Andrej A Romanovsky, Frank Porreca, Amol M Patwardhan
BACKGROUND: Intraoperative hypothermia and postoperative pain control are two important clinical challenges in anesthesiology. Transient receptor potential vanilloid 1 has been implicated both in thermoregulation and pain. Transient receptor potential vanilloid 1 antagonists were not advanced as analgesics in humans in part due to a side effect of hyperthermia. This study tested the hypothesis that a single, preincision injection of a transient receptor potential vanilloid 1 antagonist could prevent anesthesia-induced hypothermia and decrease the opioid requirement for postsurgical hypersensitivity...
August 14, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28806217/the-effect-of-ondansetron-on-acute-opioid-tolerance-in-patients-receiving-intrathecal-opioids-prior-to-cesarean-delivery
#2
Kevin C Greer, Abdullah S Terkawi, Siny Tsang, Priyanka Singla, Marcel E Durieux, Mohamed Tiouririne
BACKGROUND: Multiple animal studies suggest that ondansetron ameliorates opioid-induced hyperalgesia and tolerance. In this study, we aimed to determine if the administration of ondansetron prior to spinal anesthesia would have an effect on intrathecal opioid-induced acute opioid tolerance, postoperative pain, and analgesic requirements in patients undergoing cesarean delivery with spinal anesthesia. METHODS: Eighty-six patients undergoing elective cesarean delivery were recruited and randomly allocated to receive either 8 mg intravenous ondansetron (n = 44) or placebo (n = 42) in a prospective, double-blind design...
September 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28806211/the-opiorphin-analog-str-324-decreases-sensory-hypersensitivity-in-a-rat-model-of-neuropathic-pain
#3
Alain Van Elstraete, Philippe Sitbon, Leila Hamdi, Victor Juarez-Perez, Jean-Xavier Mazoit, Dan Benhamou, Catherine Rougeot
BACKGROUND: Neuropathic pain represents a therapeutic challenge, and treatments with increased efficacy and tolerability still need to be developed. Opiorphin protects endogenous enkephalins from degradation, potentiating enkephalin-dependent analgesia via the activation of opioid pathways. Enkephalins are natural ligands of opioid receptors, with strong affinity for δ-opioid receptors. Expression of functional δ-opioid receptors increases in sensory neurons after peripheral nerve injury in neuropathic pain models...
August 10, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28800186/ameliorative-response-to-detoxification-psychotherapy-and-medical-management-in-patients-maintained-on-opioids-for-pain
#4
Molly Belkin, Howard Stephen Reinheimer, Jordan Levy, Brian Johnson
BACKGROUND AND OBJECTIVES: The prevalence of opioid-induced hyperalgesia (OIH) among patients maintained on opioids for chronic non-malignant pain has not been estimated. As a contribution toward establishing its prevalence, we report a case series of opioid maintained patients whose pain tolerance was measured by the cold pressor test at baseline. METHODS: A case series of 117 patients who had undergone detoxification was reviewed retrospectively. Most patients (n = 108) and selected non-addicted support persons who accompanied them (controls; n = 37) had cold pressor time (CPT) assessments at baseline...
August 11, 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28780471/neuropathic-pain-attenuating-effects-of-perampanel-in-an-experimental-model-of-chronic-constriction-injury-in-rats
#5
Ravneet Kaur Khangura, Anjana Bali, Gunjanpreet Kaur, Nirmal Singh, Amteshwar Singh Jaggi
The present study explores the pain attenuating effect of perampanel, AMPA receptor antagonist, in chronic constriction injury-induced neuropathic pain. Chronic Constriction Injury was performed by putting four loose ligatures around the sciatic nerve. Pain was assessed by determining mechanical hyperalgesia, cold allodynia and heat hyperalgesia on 7th and 14th day post surgery. Perampanel (3mg and 6mg/kg, p.o.) was administered 30min before pain assessment test on 14th day post-surgery. CCI led to significant development of pain and peak symptoms were observed on 14th day...
August 3, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28763302/intramuscularly-injected-neurotropin-reduced-muscular-mechanical-hyperalgesia-induced-by-repeated-cold-stress-in-rats
#6
Teruaki Nasu, Shiori Murase, Yoshiko Takeda-Uchimura, Kazue Mizumura
An extract of rabbit skin inflamed by inoculation with the vaccinia virus, neurotropin [by intravenous, oral, and intramuscular (i.m.) administration], has been used in China and Japan for the treatment of chronic pain. In this study, we investigated the analgesic mechanism of i.m. neurotropin. Rats were exposed to repeated cold stress, and muscular mechanical hyperalgesia was evaluated by measuring the withdrawal threshold of the gastrocnemius muscle using Randall-Selitto apparatus. I.m. but not subcutaneous, neurotropin dose dependently reduced the repeated cold stress-induced muscular mechanical hyperalgesia for 3 h, but it had no effect in normal rats...
July 31, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28758123/peripheral-antinociception-induced-by-aripiprazole-is-mediated-by-the-opioid-system
#7
Renata Cristina Mendes Ferreira, Ana Flávia Almeida-Santos, Igor Dimitri Gama Duarte, Daniele C Aguiar, Fabricio A Moreira, Thiago Roberto Lima Romero
BACKGROUND: Aripiprazole is an antipsychotic drug used to treat schizophrenia and related disorders. Our previous study showed that this compound also induces antinociceptive effects. The present study aimed to assess the participation of the opioid system in this effect. METHODS: Male Swiss mice were submitted to paw pressure test and hyperalgesia was induced by intraplantar injection of prostaglandin E2 (PGE2, 2 μg). Aripiprazole was injected 10 min before the measurement...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28745932/genetic-deletion-of-microglial-panx1-attenuates-morphine-withdrawal-but-not-analgesic-tolerance-or-hyperalgesia-in-mice
#8
Nicole E Burma, Heather Leduc-Pessah, Tuan Trang
Opioids are among the most powerful analgesics for managing pain, yet their repeated use can lead to the development of severe adverse effects. In a recent study, we identified the microglial pannexin-1 channel (Panx1) as a critical substrate for opioid withdrawal. Here, we investigated whether microglial Panx1 contributes to opioid-induced hyperalgesia (OIH) and opioid analgesic tolerance using mice with a tamoxifen-inducible deletion of microglial Panx1. We determined that escalating doses of morphine resulted in thermal pain hypersensitivity in both Panx1-expressing and microglial Panx1-deficient mice...
July 26, 2017: Channels
https://www.readbyqxmd.com/read/28737888/discovery-of-novel-proline-based-neuropeptide-ff-receptor-antagonists
#9
Thuy Nguyen, Ann M Decker, Tiffany L Langston, Kelly M Mathews, Justin N Siemian, Jun-Xu Li, Danni L Harris, Scott P Runyon, Yanan Zhang
The neuropeptide FF (NPFF) system has been implicated in a number of physiological processes including modulating the pharmacological activity of opioid analgesics and several other classes of drugs of abuse. In this study, we report the discovery of a novel proline scaffold with antagonistic activity at the NPFF receptors through a high throughput screening campaign using a functional calcium mobilization assay. Focused structure-activity relationship studies on the initial hit 1 have resulted in several analogs with calcium mobilization potencies in the submicromolar range and modest selectivity for the NPFF1 receptor...
July 24, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28731926/history-of-anaesthesia-the-ketamine-story-past-present-and-future
#10
Georges Mion
No abstract text is available yet for this article.
September 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28722336/evidence-for-the-modulation-of-nociception-in-mice-by-central-mast-cells
#11
C L Kissel, K J Kovács, A A Larson
BACKGROUND: Hyperalgesia that develops following nerve ligation corresponds temporally and in magnitude with the number of thalamic mast cells located contralateral to the ligature. We tested the possibility that mast cells modulate nociception centrally, similar to their role in the periphery. METHODS: We examined the central effect of two hyperalgesic compounds that induce mast cell degranulation and of stabilized mast cells using cromolyn. RESULTS: Thermal hyperalgesia (tail flick) induced by nerve growth factor (NGF, a neurotrophic compound) and mechanical hyperalgesia (von Frey) induced by dynorphin A (1-17) (opioid compound) each correlated with the per cent of thalamic mast cells that were degranulated...
July 19, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28716934/sigma-1-receptors-control-immune-driven-peripheral-opioid-analgesia-during-inflammation-in-mice
#12
Miguel A Tejada, Angeles Montilla-García, Shane J Cronin, Domagoj Cikes, Cristina Sánchez-Fernández, Rafael González-Cano, M Carmen Ruiz-Cantero, Josef M Penninger, José M Vela, José M Baeyens, Enrique J Cobos
Sigma-1 antagonism potentiates the antinociceptive effects of opioid drugs, so sigma-1 receptors constitute a biological brake to opioid drug-induced analgesia. The pathophysiological role of this process is unknown. We aimed to investigate whether sigma-1 antagonism reduces inflammatory pain through the disinhibition of the endogenous opioidergic system in mice. The selective sigma-1 antagonists BD-1063 and S1RA abolished mechanical and thermal hyperalgesia in mice with carrageenan-induced acute (3 h) inflammation...
August 1, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28638273/the-effect-of-nefopam-infusion-during-laparascopic-cholecystectomy-on-postoperative-pain
#13
Eun Mi Kim, Joo Hyun Jeon, Mi Hwa Chung, Eun Mi Choi, Seung Hwa Baek, Pil Hyun Jeon, Mi Hyeon Lee
Background: While recovery from remifentanil is fast due to its rapid metabolism, it can induce hyperalgesia by activation of N-methyl-D-aspartic acid (NMDA) receptors. Therefore, administration of NMDA receptor antagonists such as ketamine is effective in relieving hyperalgesia caused by remifentanil. A previous study showed that nefopam administration before anesthesia combined with low-dose remifentanil reduced pain and analgesic consumption during the immediate postoperative period. We hypothesized that intraoperative infusion of nefopam during laparoscopic cholecystectomy would be as effective as ketamine in controlling pain during the acute postoperative period after sevoflurane and remifentanil based anesthesia...
2017: International Journal of Medical Sciences
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
#14
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...
August 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
#15
Lucas V Lima, Josimari M DeSantana, Lynn A Rasmussen, Kathleen A Sluka
Regular physical activity prevents the development of chronic muscle pain through the 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 N-methyl-D-aspartate receptor (p-NR1) and serotonin transporter (SERT) in the RVM...
September 2017: Pain
https://www.readbyqxmd.com/read/28616391/opioid-free-anaesthesia-in-three-dogs
#16
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
#17
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
#18
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)...
August 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28535569/reinstituting-the-bolus-new-reasoning-for-an-existing-technique
#19
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
#20
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 with 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...
August 2017: Journal of Pharmacology and Experimental Therapeutics
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