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Abstract
In recent years, studies have substantiated the view that P2X3 receptors play a part in the generation and transmission of purinergic signals in inflammatory and chronic neuropathic pain. Data have also been presented to suggest that the process of P2X3 receptor antagonism inhibits inflammatory hyperalgesia, involving the spinal opioid system. The aim of this study was to investigate the effect of the selective P2X3 receptor antagonist A-317491 on the development of antinociceptive tolerance to chronic morphine administration in mice. Daily systemic injection of A-317491 attenuated the morphine-induced antinociceptive tolerance to von Frey and thermal stimuli. Repeated morphine injections alone led to a significant rightward shift in the morphine dose-response curve compared with that with A-317491. A single dose of A-317491 also showed a reversal effect in morphine-tolerant mice. In a withdrawal test, co-administration of A-317491 and morphine also reduced the naloxone-induced withdrawal symptoms compared with the morphine-alone group. Thus, we propose that the P2X3 receptor is involved in the process of morphine antinociceptive tolerance and may be a new therapeutic target in the prevention of tolerance to morphine-induced antinociception.
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Bao Y, Gao Y, Yang L, Kong X, Yu J, Hou W, Hua B. The mechanism of μ-opioid receptor (MOR)-TRPV1 crosstalk in TRPV1 activation involves morphine anti-nociception, tolerance and dependence. Channels (Austin) 2015; 9:235-43. [PMID: 26176938 DOI: 10.1080/19336950.2015.1069450] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Initiated by the activation of various nociceptors, pain is a reaction to specific stimulus modalities. The μ-opioid receptor (MOR) agonists, including morphine, remain the most potent analgesics to treat patients with moderate to severe pain. However, the utility of MOR agonists is limited by the adverse effects associated with the use of these drugs, including analgesic tolerance and physical dependence. A strong connection has been suggested between the expression of the transient receptor potential vanilloid type 1 (TRPV1) ion channel and the development of inflammatory hyperalgesia. TRPV1 is important for thermal nociception induction, and is mainly expressed on sensory neurons. Recent reports suggest that opioid or TRPV1 receptor agonist exposure has contrasting consequences for anti-nociception, tolerance and dependence. Chronic morphine exposure modulates TRPV1 activation and induces the anti-nociception effects of morphine. The regulation of many downstream targets of TRPV1 plays a critical role in this process, including calcitonin gene-related peptide (CGRP) and substance P (SP). Additional factors also include capsaicin treatment blocking the anti-nociception effects of morphine in rats, as well as opioid modulation of TRPV1 responses through the cAMP-dependent PKA pathway and MAPK signaling pathways. Here, we review new insights concerning the mechanism underlying MOR-TRPV1 crosstalk and signaling pathways and discuss the potential mechanisms of morphine-induced anti-nociception, tolerance and dependence associated with the TRPV1 signaling pathway and highlight how understanding these mechanisms might help find therapeutic targets for the treatment of morphine induced antinociception, tolerance and dependence.
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Affiliation(s)
- Yanju Bao
- a Department of Oncology ; Guang'anmen Hospital, China Academy of Chinese Medical Sciences ; Beijing , P. R. China
| | - Yebo Gao
- a Department of Oncology ; Guang'anmen Hospital, China Academy of Chinese Medical Sciences ; Beijing , P. R. China.,b Beijing University of Chinese Medicine ; Beijing , P. R. China
| | - Liping Yang
- c Department of Nephrology ; Guang'anmen Hospital, China Academy of Chinese Medical Sciences ; Beijing , P. R. China
| | - Xiangying Kong
- d Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences ; Beijing , P. R. China
| | - Jing Yu
- e Department of Oncology ; Beijing Friendship Hospital, Capital Medical University ; Beijing , China
| | - Wei Hou
- a Department of Oncology ; Guang'anmen Hospital, China Academy of Chinese Medical Sciences ; Beijing , P. R. China
| | - Baojin Hua
- a Department of Oncology ; Guang'anmen Hospital, China Academy of Chinese Medical Sciences ; Beijing , P. R. China
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Rehni AK, Singh TG. Pharmacological modulation of geranylgeranyltransferase and farnesyltransferase attenuates opioid withdrawal in vivo and in vitro. Neuropharmacology 2013; 71:19-26. [PMID: 23415632 DOI: 10.1016/j.neuropharm.2013.01.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 01/15/2013] [Accepted: 01/20/2013] [Indexed: 11/29/2022]
Abstract
Geranylgeranyltransferase and farnesyltransferase I, are noted to mediate a number of signal transduction cascades which are known to be involved in the causation of opioid withdrawal syndrome. GGTI-2133 and FTI-276 are selective modulators of geranylgeranyltransferase and farnesyltransferase subtype 1 respectively. Therefore, the present study investigated the effect of GGTI-2133 and FTI-276 on propagation of morphine dependence and resultant withdrawal signs in vivo, in sub-chronic morphine mouse model, and in vitro, in isolated rat ileum. Morphine was administered twice daily for 5 days following which a single day 6 injection of naloxone (8 mg/kg, i.p.) precipitated opioid withdrawal syndrome in mice. Withdrawal syndrome was quantitatively assessed in terms of withdrawal severity score and the frequency of jumping, rearing, fore paw licking & circling. Naloxone induced contraction in morphine withdrawn isolated rat ileum was employed as an in vitro model of opioid withdrawal syndrome. An isobolographic study design was employed to assess a potential synergistic activity between GGTI-2133 and FTI-276. GGTI-2133 and FTI-276 dose dependently attenuated naloxone induced morphine withdrawal syndrome both in vivo and in vitro. GGTI-2133 was also observed to exert a synergistic interaction with FTI-276. It is concluded that GGTI-2133 and FTI-276 attenuate the propagation of morphine dependence and reduce withdrawal signs possibly by a geranylgeranyl transferase; farnesyltransferase activation pathway linked mechanisms potentially in an interdependent manner.
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Affiliation(s)
- Ashish K Rehni
- Department of Pharmacology, Chitkara College of Pharmacy, Chitkara University, Chandigarh Patiala National Highway, Rajpura, Patiala 147002 Punjab, India.
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Extracellular signal-regulated kinase 5 in the cerebrospinal fluid-contacting nucleus contributes to morphine physical dependence in rats. J Mol Neurosci 2012; 50:215-20. [PMID: 23143893 DOI: 10.1007/s12031-012-9915-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 10/26/2012] [Indexed: 12/18/2022]
Abstract
The cerebrospinal fluid-contacting nucleus (CSF-CN) may influence actual composition of the CSF for non-synaptic signal transmission via releasing or absorbing bioactive substances, which distributes and localizes in the ventral periaqueductal central gray of the brainstem. Previous studies demonstrated that CSF-CN was involved in neuropathic pain and morphine dependence. Thus, to identify whether extracellular signal-regulated kinase 5 (ERK5) distributed in the CSF-CN and its function on the formation and development of morphine physical dependence, morphine withdrawal-like behavioral test and immunofluorescent technique were used in this research. Morphine was subcutaneously injected by an intermittent and escalating procedure to induce physical dependence, which was measured by withdrawal symptoms. In this study, we found that horseradish peroxidase-conjugated toxin subunit B/p-ERK5 double-labeled neurons expressed in the CSF-CN of normal rats. ERK5 signaling pathway was remarkably activated by naloxone-precipitated withdrawal in the CSF-CN. Moreover, selective attenuation of p-ERK5 expression in the CSF-CN by lateral ventricle injection of BIX02188 could significantly relieve morphine withdrawal symptom. These findings confirmed that the activation of p-ERK5 in the CSF-CN might contribute to morphine physical dependence.
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Lu XF, Li YY, Wang CG, Wei JQ, Ye Y, Zhang LC, Cao JL. Substance P in the cerebrospinal fluid-contacting nucleus contributes to morphine physical dependence in rats. Neurosci Lett 2011; 488:188-92. [DOI: 10.1016/j.neulet.2010.11.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2010] [Revised: 11/08/2010] [Accepted: 11/09/2010] [Indexed: 10/18/2022]
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Nguyen TL, Nam YS, Lee SY, Kim HC, Jang CG. Effects of capsazepine, a transient receptor potential vanilloid type 1 antagonist, on morphine-induced antinociception, tolerance, and dependence in mice. Br J Anaesth 2010; 105:668-74. [PMID: 20719804 DOI: 10.1093/bja/aeq212] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Repeated morphine treatment has been shown to induce transient receptor potential vanilloid type 1 (TRPV1) expression in the spinal cord, dorsal root ganglion (DRG), and sciatic nerve of a rat model. Increased TRPV1 expression may therefore play a role in morphine tolerance. In this study, we evaluated the hypothesis that blockage of TRPV1 may be useful as an adjunctive pain management therapy. We investigated whether blockage of TRPV1 by capsazepine, a TRPV1 antagonist, affected antinociception, development of tolerance, and physical dependence on morphine in mice. METHODS Institute of Cancer Research mice were pretreated with capsazepine and post-treated with morphine acutely and repeatedly. Antinociception and its tolerance were assessed using the hot-plate test. Morphine dependence was examined through the manifestation of withdrawal symptoms induced by naloxone in morphine-dependent mice. RESULTS Acute capsazepine treatment (5 mg kg⁻¹, i.p.) potentiated the antinociceptive effects of morphine, as measured by the hot-plate test. Repeated co-treatment of capsazepine (2.5 mg kg⁻¹ i.p.) with morphine attenuated the development of tolerance to the antinociceptive effect of morphine. The development of morphine dependence was also reduced by capsazepine (1.25 or 2.5 mg kg⁻¹ i.p.). CONCLUSIONS Our results suggest that TRPV1 antagonists can be used adjunctively to morphine treatment because they strengthen morphine antinociception and prevent the development of tolerance, and also physical dependence, on morphine.
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Affiliation(s)
- T-L Nguyen
- Department of Pharmacology, School of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
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Nseir S, Hoel J, Grailles G, Soury-Lavergne A, Di Pompeo C, Mathieu D, Durocher A. Remifentanil discontinuation and subsequent intensive care unit-acquired infection: a cohort study. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2009; 13:R60. [PMID: 19383164 PMCID: PMC2689508 DOI: 10.1186/cc7788] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Revised: 03/04/2009] [Accepted: 04/21/2009] [Indexed: 01/17/2023]
Abstract
INTRODUCTION Recent animal studies demonstrated immunosuppressive effects of opioid withdrawal resulting in a higher risk of infection. The aim of this study was to determine the impact of remifentanil discontinuation on intensive care unit (ICU)-acquired infection. METHODS This was a prospective observational cohort study performed in a 30-bed medical and surgical university ICU, during a one-year period. All patients hospitalised in the ICU for more than 48 hours were eligible. Sedation was based on a written protocol including remifentanil with or without midazolam. Ramsay score was used to evaluate consciousness. The bedside nurse adjusted sedative infusion to obtain the target Ramsay score. Univariate and multivariate analyses were performed to determine risk factors for ICU-acquired infection. RESULTS Five hundred and eighty-seven consecutive patients were included in the study. A microbiologically confirmed ICU-acquired infection was diagnosed in 233 (39%) patients. Incidence rate of ICU-acquired infection was 38 per 1000 ICU-days. Ventilator-associated pneumonia was the most frequently diagnosed ICU-acquired infection (23% of study patients). Pseudomonas aeruginosa was the most frequently isolated microorganism (30%). Multivariate analysis identified remifentanil discontinuation (odds ratio (OR) = 2.53, 95% confidence interval (CI) = 1.28 to 4.99, P = 0.007), simplified acute physiology score II at ICU admission (1.01 per point, 95% CI = 1 to 1.03, P = 0.011), mechanical ventilation (4.49, 95% CI = 1.52 to 13.2, P = 0.006), tracheostomy (2.25, 95% CI = 1.13 to 4.48, P = 0.021), central venous catheter (2.9, 95% CI = 1.08 to 7.74, P = 0.033) and length of hospital stay (1.05 per day, 95% CI = 1.03 to 1.08, P < 0.001) as independent risk factors for ICU-acquired infection. CONCLUSIONS Remifentanil discontinuation is independently associated with ICU-acquired infection.
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Affiliation(s)
- Saad Nseir
- Intensive Care Unit, Calmette Hospital, University Hospital of Lille, boulevard du Pr Leclercq, 59037 Lille cedex, France
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Alburges ME, Frankel PS, Hoonakker AJ, Hanson GR. Responses of limbic and extrapyramidal substance P systems to nicotine treatment. Psychopharmacology (Berl) 2009; 201:517-27. [PMID: 18773198 PMCID: PMC2678878 DOI: 10.1007/s00213-008-1316-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Accepted: 08/21/2008] [Indexed: 10/21/2022]
Abstract
RATIONALE Neuropeptides are linked to the psychopathology of stimulants of abuse, principally through dopamine mechanisms. Substance P (SP) is one of these neuropeptides and is associated with both limbic and extrapyramidal dopaminergic pathways and likely contributes to the pharmacology of these stimulants. The effects of nicotine on these dopamine systems have also been extensively studied; however, its effects on the associated SP pathways have received little attention. OBJECTIVES In the present study, we elucidated the effects of nicotine treatment on limbic and extrapyramidal SP systems by measuring changes in associated SP tissue concentrations. MATERIALS AND METHODS Male Sprague-Dawley rats received (+/-)nicotine 4.0 mg/kg/day (0.8 mg/kg, intraperitoneally; five injections at 2-h intervals) in the presence or absence of selective dopamine D1 and D2 receptor antagonists or a nonselective nicotinic acetylcholine receptor antagonist. RESULTS The nicotine treatment significantly but temporarily decreased substance P-like immunoreactivity (SPLI) content in the ventral tegmental area (VTA) and substantia nigra 12-18 h after drug exposure. The nicotine-mediated changes in SPLI were selectively blocked by pretreatment with mecamylamine as well as a dopamine D1, D2, or both receptor antagonists. Other brain areas that also selectively demonstrated nicotine-related declines in SPLI content included prefrontal cortex, the nucleus accumbens shell, and the very posterior caudate. CONCLUSIONS These findings indicate that some limbic and basal ganglia SP systems are significantly affected by exposure to nicotine through processes mediated by nicotinic and dopaminergic receptors, suggesting a role for SP pathways in nicotine's limbic and extrapyramidal effects.
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Affiliation(s)
- Mario E Alburges
- Department of Pharmacology and Toxicology, University of Utah, 30 South 2000 East, Room 201, Salt Lake City, UT, USA.
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Trang T, Sutak M, Jhamandas K. Involvement of cannabinoid (CB1)-receptors in the development and maintenance of opioid tolerance. Neuroscience 2007; 146:1275-88. [PMID: 17395382 DOI: 10.1016/j.neuroscience.2007.02.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2006] [Revised: 02/13/2007] [Accepted: 02/15/2007] [Indexed: 10/23/2022]
Abstract
Sustained exposure to opioid agonists such as morphine increases levels of calcitonin gene-related peptide (CGRP) in the spinal dorsal horn, a response implicated in the development of opioid tolerance and physical dependence. Recent evidence suggests that both the opioid-induced increase in CGRP and the development of opioid physical dependence are suppressed by blockade of spinal cannabinoid (CB1)-receptors. The present study examined whether CB1-receptor activity also has a role in the development of opioid tolerance. In rats implanted with spinal catheters, repeated acute injections of morphine (15 microg) delivered over 4 h resulted in a rapid decline of thermal and mechanical antinociception and a significant loss of analgesic potency, reflecting development of acute opioid tolerance. In another set of experiments, chronic administration of spinal morphine (15 microg) once daily for 5 days produced a similar loss of analgesic effect and a marked increase in CGRP-immunoreactivity in the superficial laminae of the dorsal horn. Consistent with the in vivo findings, primary cultures of adult dorsal root ganglion (DRG) neurons exposed to morphine for 5 days showed a significant increase in the number of CGRP-immunoreactive neurons. Co-administration of acute or chronic morphine with a CB1-receptor antagonist/inverse agonist, 1-(2,4-dichlorophenyl)-5-(4-iodophenyl)-4-methyl-N-1-piperidinyl-1H-pyrazole-3-carboxamide (AM-251), inhibited the development of both acute and chronic analgesic tolerance. In animals already exhibiting tolerance to morphine, intervention with AM-251 restored morphine analgesic potency. Co-administration with AM-251 attenuated the morphine-induced increase in CGRP-immunoreactivity in the spinal cord and in DRG cultured neurons. Collectively, the results of this study suggest that activity of endocannabinoids, mediated via CB1-receptors, contributes to both the development and maintenance of opioid tolerance by influencing the opioid-induced increase in spinal CGRP.
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MESH Headings
- Analgesics, Opioid/pharmacology
- Animals
- Cells, Cultured
- Data Interpretation, Statistical
- Dose-Response Relationship, Drug
- Drug Tolerance/physiology
- Ganglia, Spinal/cytology
- Ganglia, Spinal/drug effects
- Ganglia, Spinal/metabolism
- Injections, Spinal
- Male
- Morphine/pharmacology
- Nociceptors/drug effects
- Pain Measurement/drug effects
- Piperidines
- Pyrazoles
- Rats
- Rats, Sprague-Dawley
- Reaction Time/drug effects
- Receptor, Cannabinoid, CB1/agonists
- Receptor, Cannabinoid, CB1/physiology
- Receptors, Calcitonin Gene-Related Peptide/biosynthesis
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Affiliation(s)
- T Trang
- Department of Pharmacology and Toxicology, Queen's University, Kingston, Ontario, Canada K7L 3N6
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Binsack R, Zheng ML, Zhang ZS, Yang L, Zhu YP. Chronic morphine drinking establishes morphine tolerance, but not addiction in Wistar rats. J Zhejiang Univ Sci B 2007; 7:892-8. [PMID: 17048304 PMCID: PMC1635814 DOI: 10.1631/jzus.2006.b0892] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Some animal models apply morphine in the drinking water to generate addiction, but related reports are not free of conflicting results. Accordingly, this study aimed to figure out if chronic consumption of morphine in the drinking water can induce morphine addiction in Wistar rats. METHODS For 3 weeks, the animals received a daily morphine dose of 35 mg/kg by offering a calculated volume of sugar water (5% sucrose) with morphine (0.1 mg/ml) to each rat; animals receiving just sugar water served as controls. Immediately after the treatment phase, the tail immersion test was used to check for morphine tolerance, and all animals were then kept on tap water for one week (withdrawal phase). Afterwards, all rats were allowed to choose their drinking source by offering two bottles, containing sugar water without and with morphine, simultaneously for two days (preference phase). RESULTS While the chronic consumption of morphine led to a reduction in body weight and to morphine tolerance, the morphine-treated Wistar rats did not show any preference for the opiate-containing sugar water. CONCLUSION Body weight loss and tolerance do not reveal a condition of drug craving, and current animal models should be re-evaluated regarding their potential to establish morphine addicted animals.
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Affiliation(s)
- Ralf Binsack
- Department of Toxicology, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Ming-lan Zheng
- Department of Toxicology, School of Medicine, Zhejiang University, Hangzhou 310006, China
- Zhejiang Center for Disease Prevention and Control, Hangzhou 310009, China
| | - Zhan-sai Zhang
- Department of Toxicology, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Liu Yang
- Department of Toxicology, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Yong-ping Zhu
- Department of Toxicology, School of Medicine, Zhejiang University, Hangzhou 310006, China
- †E-mail:
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Wan Q, Douglas SD, Wang X, Kolson DL, O'Donnell LA, Ho WZ. Morphine upregulates functional expression of neurokinin-1 receptor in neurons. J Neurosci Res 2007; 84:1588-96. [PMID: 16983662 DOI: 10.1002/jnr.21053] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Neuronkinin-1 receptor (NK-1R), the neuropeptide substance P (SP) preferring receptor, is highly expressed in areas of the central nervous system (CNS) that are especially implicated in depression, anxiety, and stress. Repeated exposure to opioids may sensitize neuronal systems involved in stress response. We examined the effects of morphine, the principal metabolite of heroin, on the functional expression of NK-1R in the cortical neurons. NK-1R and mu-opioid receptor (MOR) are co-expressed in the cortical neurons. Morphine enhanced NK-1R expression in the cortical neurons at both the mRNA and protein levels. The upregulated NK-1R by morphine had functional activity, because morphine-treated cortical neurons had greater SP-induced Ca(2+) mobilization than untreated neurons. Blocking opioid receptors on the cortical neurons by naltrexone or CTAP (a mu-opioid receptor antagonist) abolished the morphine action. Investigation of the mechanism(s) responsible for the morphine action showed that morphine activated NK-1R promoter and induced the phosphorylation of p38 MAPK protein in the cortical neurons. These in vitro data provide a plausible cellular mechanism for opioid-mediated neurological disorders.
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MESH Headings
- Analysis of Variance
- Animals
- Blotting, Western/methods
- Calcium/metabolism
- Cerebral Cortex/cytology
- Drug Interactions
- Embryo, Mammalian
- Enzyme Activation/drug effects
- Enzyme Inhibitors/pharmacology
- Fluorescent Antibody Technique/methods
- Morphine/pharmacology
- Naltrexone/pharmacology
- Narcotic Antagonists/pharmacology
- Narcotics/pharmacology
- Neurons/drug effects
- Peptide Fragments
- Peptides/pharmacology
- RNA, Messenger/biosynthesis
- Rats
- Rats, Sprague-Dawley
- Receptors, Neurokinin-1/genetics
- Receptors, Neurokinin-1/metabolism
- Receptors, Opioid, mu/genetics
- Receptors, Opioid, mu/metabolism
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Somatostatin
- Up-Regulation/drug effects
- p38 Mitogen-Activated Protein Kinases/metabolism
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Affiliation(s)
- Qi Wan
- Division of Allergy and Immunology, Joseph Stokes Jr. Research Institute at The Children's Hospital of Philadelphia, Department of Pediatrics, Philadelphia, Pennsylvania
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Wang X, Douglas SD, Peng JS, Zhou DJ, Wan Q, Ho WZ. An in vitro model of morphine withdrawal manifests the enhancing effect on human immunodeficiency virus infection of human T lymphocytes through the induction of substance P. THE AMERICAN JOURNAL OF PATHOLOGY 2006; 169:1663-70. [PMID: 17071590 PMCID: PMC1780221 DOI: 10.2353/ajpath.2006.060358] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/26/2006] [Indexed: 11/20/2022]
Abstract
Opioid withdrawal is a crucial and recurring event during the course of opioid abuse that has a negative impact on the immune system. In this study, we investigated whether abrupt withdrawal (AW) or precipitated withdrawal (PW) potentiates human immunodeficiency virus (HIV) infection of human T lymphocytes. AW and PW enhanced HIV infection of peripheral blood lymphocytes and T-cell lines (Jurkat and CEMX174). In addition, both AW and PW induced HIV replication in a latently HIV-infected human T-cell line (J1.1). The enhancing effect of AW and PW was associated with the induction of neuropeptide substance P in both peripheral blood lymphocytes and the T-cell lines. The substance P receptor antagonist, CP-96,345, not only blocked AW- or PW-induced endogenous substance P expression but also abrogated AW- or PW-induced HIV replication in T cells. These findings provide a cellular mechanism that supports the notion that opioids have a co-factor role in promoting HIV infection of the immune cells.
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Affiliation(s)
- Xu Wang
- Department of Pediatrics, Division of Allergy and Immunology, Joseph Stokes Jr. Research Institute at the Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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Trang T, Ma W, Chabot JG, Quirion R, Jhamandas K. Spinal modulation of calcitonin gene-related peptide by endocannabinoids in the development of opioid physical dependence. Pain 2006; 126:256-71. [PMID: 16935424 DOI: 10.1016/j.pain.2006.07.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2006] [Revised: 06/12/2006] [Accepted: 07/06/2006] [Indexed: 11/16/2022]
Abstract
Studies implicate endocannabinoids in the acute and chronic actions of opioid drugs, including the genesis of physical dependence. Previous evidence suggests that spinal release of calcitonin gene-related peptide (CGRP) and activation of its receptors contribute to opioid physical dependence. The release of CGRP at the spinal level is modulated by cannabinoid (CB1)-receptors. Thus, this study examined whether CB1-receptor activity mediates changes in CGRP underlying development of opioid physical dependence. Systemic morphine administration for 5-days elevated CGRP-immunoreactivity in the rat spinal dorsal horn. In situ hybridization of dorsal root ganglion (DRG) neurons revealed an increase in CGRP mRNA during initial (day 1-3) but not later phase (day 4-5) of morphine treatment. CGRP-immunoreactivity in DRG neurons, however, was increased in the later phase of morphine treatment. Naloxone challenge to morphine-treated animals precipitated an intense withdrawal syndrome that depleted CGRP-immunoreactivity and increased Fos expression in the dorsal horn. The Fos-response primarily occurred in neurons that expressed CGRP receptor component protein (RCP) suggesting CGRP activity contributes to neuronal activation during precipitated withdrawal. Spinal slices obtained from morphine-treated animals showed higher levels of CGRP release than from saline controls. Intrathecal co-administration of CB1-receptor antagonists, AM-251 or SR141716A, with daily morphine attenuated the behavioral manifestations of withdrawal. Treatment with AM-251 also reduced the depletion of CGRP, suppressed Fos-induction, and prevented the increase in capsaicin-evoked spinal CGRP release. Altogether, this study suggests that endocannabinoid activity, expressed via CB1-receptors, contributes to the induction of opioid physical dependence through spinal modulation of CGRP.
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Affiliation(s)
- Tuan Trang
- Department of Pharmacology and Toxicology and Anesthesiology, Queen's University Kingston, Ont., Canada K7L 3N6
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Trang T, Quirion R, Jhamandas K. The spinal basis of opioid tolerance and physical dependence: Involvement of calcitonin gene-related peptide, substance P, and arachidonic acid-derived metabolites. Peptides 2005; 26:1346-55. [PMID: 16042975 DOI: 10.1016/j.peptides.2005.03.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Chronic opioid use in the management of pain is limited by development of analgesic tolerance and physical dependence. The mechanisms underlying tolerance-dependence are not entirely clear, however, recent evidence suggests that spinal adaptations leading to increased activity of sensory neuropeptides (calcitonin gene-related peptide (CGRP), substance P) and their downstream signaling messengers derived from metabolism of arachidonic acid: prostaglandins (PG), lipoxygenase (LOX) metabolites, and endocannabinoids, plays an important role in this phenomenon. In this communication we review the evidence implicating these factors in the induction and expression of opioid tolerance and physical dependence at the spinal level.
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Affiliation(s)
- Tuan Trang
- Department of Pharmacology and Toxicology, Faculty of Health Sciences, Queen's University, Kingston, Ont., Canada K7L 3N6
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Wang X, Douglas SD, Commons KG, Pleasure DE, Lai J, Ho C, Bannerman P, Williams M, Ho W. A non-peptide substance P antagonist (CP-96,345) inhibits morphine-induced NF-kappa B promoter activation in human NT2-N neurons. J Neurosci Res 2004; 75:544-53. [PMID: 14743438 DOI: 10.1002/jnr.10873] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Opioids and the neuropeptide substance P (SP) modulate the expression of inflammatory cytokines and chemokines, which are under the control of nuclear factor kappaB (NF-kappaB). We investigated whether the neurokinin-1 receptor (SP receptor) pathway is biologically involved in morphine-mediated modulation of NF-kappaB promoter activation in a human neuronal cell line (NT2-N) that expresses both the mu-opioid receptor (MOR) and the SP receptor. Morphine significantly enhanced NF-kappaB promoter-directed luciferase activity in NT2-N neurons. DAMGO, a selective mu-opioid receptor agonist, also induced NF-kappaB promoter activation. The induced activation of NF-kappaB promoter by morphine or DAMGO was abolished not only by naltrexone (a opioid receptor antagonist) and CTAP (a selective, competitive mu-opioid receptor antagonist), but also by CP-96,345, a non-peptide SP receptor antagonist. Investigation of the mechanism responsible for morphine-induced activation of NF-kappaB promoter in NT2-N neurons demonstrated that morphine activates the SP promoter and induces SP expression in these cells. We also observed that SP activated NF-kappaB promoter and that CP-96,345 downregulated the expression of endogenous SP. Furthermore, dual immunofluorescent labeling revealed that there is co-expression of NK-1R and MOR in the processes of NT-2N neurons. These results suggest that morphine, by activating MOR, engages a positive feedback loop between NK-1R and SP. Activation of NK-1R could then impact NF-kappaB expression and therefore may be an important participant in the effect of morphine on immune responses in the central nervous system.
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Affiliation(s)
- Xu Wang
- Division of Immunologic and Infectious Diseases, Joseph Stokes Jr. Research Institute of The Children's Hospital of Philadelphia, Department of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
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Zhou X, Li JJ, Yu LC. Plastic changes of calcitonin gene-related peptide in morphine tolerance: Behavioral and immunohistochemical study in rats. J Neurosci Res 2003; 74:622-9. [PMID: 14598307 DOI: 10.1002/jnr.10770] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The present study was undertaken to investigate the plasticity of calcitonin gene-related peptide (CGRP) in antinociception after morphine tolerance in rats. The hindpaw withdrawal latencies (HWLs) to both thermal and mechanical stimulation increased significantly after intracerebroventricular injection of 2.5 nmol of CGRP in opioid-naive rats, indicating that CGRP produces an antinociceptive effect in the brain. Furthermore, there was an antinociceptive effect after intracerebroventricular injection of 2.5 nmol of CGRP in morphine-tolerant rats. Interestingly, the antinociceptive effect induced by intracerebroventricular injection of CGRP was lower in morphine-tolerant rats than that in opioid-naive rats at the same dose. At the same time, there was downregulation of CGRP-like immunoreactivity in both lateral septal nucleus and central nucleus of amygdala tested by immunohistochemical methods, whereas no significant changes were observed in arcuate nucleus of hypothalamus and periaqueductal gray after morphine treatment in rats. The present study demonstrates plastic changes in both CGRP-induced antinociception and CGRP-like immunoreactivity in rat brain after morphine tolerance, suggesting that CGRP may play an important role in morphine tolerance.
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Affiliation(s)
- Xiang Zhou
- College of Life Sciences, Center for Brain and Cognitive Science and National Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing, People's Republic of China
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Trang T, Sutak M, Quirion R, Jhamandas K. Spinal administration of lipoxygenase inhibitors suppresses behavioural and neurochemical manifestations of naloxone-precipitated opioid withdrawal. Br J Pharmacol 2003; 140:295-304. [PMID: 12970109 PMCID: PMC1574036 DOI: 10.1038/sj.bjp.0705440] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
1. This study investigated the role of spinal lipoxygenase (LOX) products in the induction and expression of opioid physical dependence using behavioural assessment of withdrawal and immunostaining for CGRP and Fos protein expression in the spinal cord. 2. Administration of escalating doses (5-50 mg kg-1; i.p.) of morphine for 5 days markedly elevated CGRP-like immunoreactivity in the dorsal horn of the rat spinal cord. Naloxone (2 mg kg-1; i.p.) challenge precipitated a robust withdrawal syndrome that depleted CGRP-like immunoreactivity and increased the number of Fos-like immunoreactive neurons in the dorsal horn. 3. Intrathecal administration of NDGA (10, 20 microg), a nonselective LOX inhibitor, AA-861 (1.5, 3 microg), a 5-LOX selective inhibitor, or baicalein (1.4, 2.8 microg), a 12-LOX selective inhibitor, concurrently with systemic morphine for 5 days or as a single injection immediately preceding naloxone challenge, blocked the depletion of CGRP-like immunoreactivity, prevented increase in the number of Fos-like immunoreactive neurons in the dorsal horn, and significantly attenuated the morphine withdrawal syndrome. 4. The results of this study suggest that activity of LOX products, at the spinal level, contributes to the expression of opioid physical dependence, and that this activity may be expressed through increased sensory neuropeptide release.
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Affiliation(s)
- Tuan Trang
- Department of Pharmacology and Toxicology, Faculty of Health Sciences, Queen's University, 523 Botterell Hall, Kingston, Ont., Canada K7L 3N6
| | - Maaja Sutak
- Department of Pharmacology and Toxicology, Faculty of Health Sciences, Queen's University, 523 Botterell Hall, Kingston, Ont., Canada K7L 3N6
| | - Remi Quirion
- Douglas Hospital Research Centre and Department of Psychiatry, McGill University, Montreal, Que., Canada H9 H 1R3
| | - Khem Jhamandas
- Department of Pharmacology and Toxicology, Faculty of Health Sciences, Queen's University, 523 Botterell Hall, Kingston, Ont., Canada K7L 3N6
- Author for correspondence:
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Trang T, Sutak M, Quirion R, Jhamandas K. The role of spinal neuropeptides and prostaglandins in opioid physical dependence. Br J Pharmacol 2002; 136:37-48. [PMID: 11976266 PMCID: PMC1762111 DOI: 10.1038/sj.bjp.0704681] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
This study examined the role of spinal calcitonin gene-related peptide (CGRP), substance P, and prostaglandins in the development and expression of opioid physical dependence. Administration of escalating doses (5 - 100 mg kg-1, i.p.) of morphine for 7 days markedly elevated CGRP and substance P- immunoreactivity in the dorsal horn of the rat spinal cord. Naloxone (2 mg kg-1, i.p.) challenge decreased both CGRP and substance P immunoreactivity and precipitated a robust withdrawal syndrome. Acute intrathecal pre-treatment with a CGRP receptor antagonist, CGRP(8 - 37) (4, 8 microg), a substance P receptor antagonist, SR 140333 (1.4, 2.8 microg), a cyclo-oxygenase (COX) inhibitor, ketorolac (30, 45 microg), and COX-2 selective inhibitors, DuP 697 (10, 30 microg) and nimesulide (30 microg), 30 min before naloxone challenge, partially attenuated the symptoms of morphine withdrawal. CGRP(8 - 37) (8 microg), but no other agents, inhibited the decrease in CGRP immunoreactivity. Chronic intrathecal treatment with CGRP(8 - 37) (4, 8 microg), SR 140333 (1.4 microg), ketorolac (15, 30 microg), DuP 697 (10, 30micro g), and nimesulide (30 microg), delivered with daily morphine injection significantly attenuated both the symptoms of withdrawal and the decrease in CGRP but not substance P immunoreactivity. The results of this study suggest that activation of CGRP and substance P receptors, at the spinal level, contributes to the induction and expression of opioid physical dependence and that this activity may be partially expressed through the intermediary actions of prostaglandins.
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Affiliation(s)
- Tuan Trang
- Department of Pharmacology and Toxicology, Faculty of Health Sciences, Queen's University, Kingston, Ontario, Canada, K7L 3N6
| | - Maaja Sutak
- Department of Pharmacology and Toxicology, Faculty of Health Sciences, Queen's University, Kingston, Ontario, Canada, K7L 3N6
| | - Remi Quirion
- Douglas Hospital Research Centre and Department of Psychiatry, McGill University, Montreal, Quebec, Canada, H9H 1R3
| | - Khem Jhamandas
- Department of Pharmacology and Toxicology, Faculty of Health Sciences, Queen's University, Kingston, Ontario, Canada, K7L 3N6
- Author for correspondence:
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Li Y, Tian S, Douglas SD, Ho WZ. Morphine Up-regulates expression of substance P and its receptor in human blood mononuclear phagocytes and lymphocytes. Cell Immunol 2000; 205:120-7. [PMID: 11104584 DOI: 10.1006/cimm.2000.1713] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In vitro and in vivo studies have indicated that there is an important relationship between morphine and neuropeptide substance P (SP). We therefore investigated the interaction of morphine and cultured human immune cells on the expression of SP, a neuropeptide which we have recently demonstrated to be produced by human monocytes and lymphocytes. Morphine up-regulated SP production in human mononuclear phagocytes and lymphocytes at both the mRNA and the protein level. In addition, morphine induced SP receptor (NK-1R) expression in human lymphocytes. The specific morphine receptor antagonist (naltrexone) blocked morphine-induced SP expression in human mononuclear phagocytes, supporting the concept of authentic morphine receptor-mediated regulation. Since SP modulates neurogenic inflammation and immunologic events, these data suggest that morphine-induced SP expression in cells of the immune system may be of importance in the pathogenesis of immune-mediated diseases, including neuroimmunologic diseases and AIDS.
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Affiliation(s)
- Y Li
- Division of Immunologic and Infectious Diseases, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
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Zhou Q, Liu Z, Ray A, Huang W, Karlsson K, Nyberg F. Alteration in the brain content of substance P (1-7) during withdrawal in morphine-dependent rats. Neuropharmacology 1998; 37:1545-52. [PMID: 9886677 DOI: 10.1016/s0028-3908(98)00128-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Previous studies have shown that substance P (SP) may modulate the abstinence reaction to opioid withdrawal. Its N-terminal fragment SP1-7 may inhibit the intensity of the withdrawal reactions in morphine dependent mice. This study was designed to determine whether the endogenous concentrations of the SP1-7 fragment in the brain are affected during naloxone-precipitated withdrawal in the male rat. The amounts of the peptide was assessed by a specific radioimmunoassay in extracts of discrete brain regions (including the cerebral cortex, hippocampus, hypothalamus, nucleus accumbens, striatum, substantia nigra, ventral tegmental area and the spinal cord) during morphine tolerance and withdrawal. The results indicated that the concentrations of SP1-7 were significantly elevated in the ventral tegmental area both in morphine tolerant rats and during naloxone-precipitated withdrawal. During morphine withdrawal significant increases in the peptide concentration were also observed in the hypothalamus and the spinal cord. It was concluded that the enhanced content of SP1-7 may also indicate the involvement of the SP system during opioid withdrawal in the rat. The enhanced production of SP1-7 may reflect an increased release and/or metabolism of SP, which, in turn, counteracts the withdrawal.
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Affiliation(s)
- Q Zhou
- Department of Pharmaceutical Biosciences, Uppsala University, Sweden
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