1
|
Sari Y, Swiss GM, Alrashedi FA, Baeshen KA, Alshammari SA, Alsharari SD, Ali N, Alasmari AF, Alhoshani A, Alameen AA, Childers WE, Abou-Gharbia M, Alasmari F. Effects of novel beta-lactam, MC-100093, and ceftriaxone on astrocytic glutamate transporters and neuroinflammatory factors in nucleus accumbens of C57BL/6 mice exposed to escalated doses of morphine. Saudi Pharm J 2024; 32:102108. [PMID: 38868175 PMCID: PMC11166880 DOI: 10.1016/j.jsps.2024.102108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024] Open
Abstract
Chronic exposure to opioids can lead to downregulation of astrocytic glutamate transporter 1 (GLT-1), which regulates the majority of glutamate uptake. Studies from our lab revealed that beta-lactam antibiotic, ceftriaxone, attenuated hydrocodone-induced downregulation of GLT-1 as well as cystine/glutamate antiporter (xCT) expression in central reward brain regions. In this study, we investigated the effects of escalating doses of morphine and tested the efficacy of novel synthetic non-antibiotic drug, MC-100093, and ceftriaxone in attenuating the effects of morphine exposure in the expression of GLT-1, xCT, and neuroinflammatory factors (IL-6 and TGF-β) in the nucleus accumbens (NAc). This study also investigated the effects of morphine and beta-lactams in locomotor activity, spontaneous alternation percentage (SAP) and number of entries in Y maze since opioids have effects in locomotor sensitization. Mice were exposed to moderate dose of morphine (20 mg/kg, i.p.) on days 1, 3, 5, 7, and a higher dose of morphine (150 mg/kg, i.p.) on day 9, and these mice were then behaviorally tested and euthanized on Day 10. Western blot analysis showed that exposure to morphine downregulated GLT-1 and xCT expression in the NAc, and both MC-100093 and ceftriaxone attenuated these effects. In addition, morphine exposure increased IL-6 mRNA and TGF-β mRNA expression, and MC-100093 and ceftriaxone attenuated only the effect on IL-6 mRNA expression in the NAc. Furthermore, morphine exposure induced an increase in distance travelled, and MC-100093 and ceftriaxone attenuated this effect. In addition, morphine exposure decreased the SAP and increased the number of arm entries in Y maze, however, neither MC-100093 nor ceftriaxone showed any attenuating effect. Our findings demonstrated for the first time that MC-100093 and ceftriaxone attenuated morphine-induced downregulation of GLT-1 and xCT expression, and morphine-induced increase in neuroinflammatory factor, IL-6, as well as hyperactivity. These findings revealed the beneficial therapeutic effects of MC-100093 and ceftriaxone against the effects of exposure to escalated doses of morphine.
Collapse
Affiliation(s)
- Youssef Sari
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614, USA
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ghadeer M.S. Swiss
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Fatin A. Alrashedi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Kholoud A. Baeshen
- Department of Forensic Sciences, College of Criminal Justice, Naif Arab University for Security Sciences, Riyadh, Saudi Arabia
| | - Sultan A. Alshammari
- Department of Forensic Sciences, College of Criminal Justice, Naif Arab University for Security Sciences, Riyadh, Saudi Arabia
| | - Shakir D. Alsharari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Nemat Ali
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Abdullah F. Alasmari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ali Alhoshani
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Alaa A. Alameen
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Wayne E. Childers
- Department of Pharmaceutical Sciences, Temple University School of Pharmacy, Philadelphia, PA 19140, USA
| | - Magid Abou-Gharbia
- Department of Pharmaceutical Sciences, Temple University School of Pharmacy, Philadelphia, PA 19140, USA
| | - Fawaz Alasmari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| |
Collapse
|
2
|
Pahan P, Xie JY. Microglial inflammation modulates opioid analgesic tolerance. J Neurosci Res 2023; 101:1383-1392. [PMID: 37186407 DOI: 10.1002/jnr.25199] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 04/07/2023] [Accepted: 04/11/2023] [Indexed: 05/17/2023]
Abstract
As we all know, opioids are the drugs of choice for treating severe pain. However, very often, opioid use leads to tolerance, dependence, and hyperalgesia. Therefore, understanding the mechanisms underlying opioid tolerance and designing strategies for increasing the efficacy of opioids in chronic pain are important areas of research. Microglia are brain macrophages that remove debris and dead cells from the brain and participate in immune defense of the central nervous system during an insult or injury. However, recent studies indicate that microglial activation and generation of proinflammatory molecules (e.g., cytokines, nitric oxide, eicosanoids, etc.) in the brain may contribute to opioid tolerance and other side effects of opioid use. In this review, we will summarize the evidence and possible mechanisms by which proinflammatory molecules produced by activated microglia may antagonize the analgesic effect induced by opioids, and thus, lead to opioid tolerance. We will also delineate specific examples of studies that suggest therapeutic targets to counteract the development of tolerance clinically using suppressors of microglial inflammation.
Collapse
Affiliation(s)
- Priyanka Pahan
- Department of Basic Sciences, New York Institute of Technology College of Osteopathic Medicine at Arkansas State University, Arkansas, Jonesboro, USA
| | - Jennifer Yanhua Xie
- Department of Basic Sciences, New York Institute of Technology College of Osteopathic Medicine at Arkansas State University, Arkansas, Jonesboro, USA
| |
Collapse
|
3
|
Han D, Dong W, Jiang W. Pinocembrin alleviates chronic morphine-induced analgesic tolerance and hyperalgesia by inhibiting microglial activation. Neurol Res 2022; 44:946-955. [PMID: 35574904 DOI: 10.1080/01616412.2022.2075656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Dongfeng Han
- Department of Anesthesiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Weiping Dong
- Department of Anesthesiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Wei Jiang
- Department of Anesthesiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| |
Collapse
|
4
|
Colon-Perez L, Montesinos J, Monsivais M. The Future of Neuroimaging and Gut-Brain Axis Research for Substance Use Disorders. Brain Res 2022; 1781:147835. [DOI: 10.1016/j.brainres.2022.147835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 01/31/2022] [Accepted: 02/10/2022] [Indexed: 12/19/2022]
|
5
|
Alghamdi BS, Alshehri FS. Melatonin Blocks Morphine-Induced Place Preference: Involvement of GLT-1, NF-κB, BDNF, and CREB in the Nucleus Accumbens. Front Behav Neurosci 2021; 15:762297. [PMID: 34720901 PMCID: PMC8551802 DOI: 10.3389/fnbeh.2021.762297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 09/28/2021] [Indexed: 12/27/2022] Open
Abstract
Opioid addiction remains a widespread issue despite continuous attempts by the FDA to help maintain abstinence. Melatonin is a neurohormone considered to be involved only in the neuroendocrine and reproductive systems; however, recent reports have demonstrated its potential to attenuate drug addiction and dependence. Cumulative studies have suggested that melatonin can attenuate the rewarding effects of several drugs of abuse, including opioids. This study aimed to investigate the effect of melatonin (50 mg/kg) on morphine (5 mg/kg) to produce place preference. We also investigated the effect of melatonin and morphine on the expression of GLT-1, BDNF, NF-κB, and CREB within the nucleus accumbens. Male Wistar rats were divided into control, morphine, melatonin, and the morphine + melatonin groups. The study involved a two-phase habituation phase from day 1 to day 3 and an acquisition phase from day 5 to day 14. The conditioned place preference (CPP) score, distance traveled, resting time, ambulatory count, and total activity count were measured for all animals. Rats that received morphine showed a significant increase in CPP score compared to those in the control group. Morphine treatment reduced the mRNA expression of GLT-1, BDNF, and CREB and increased that of NF-κB. However, melatonin treatment administered 30 min before morphine treatment attenuated morphine place preference and reversed GLT-1, BDNF, NF-κB, and CREB expression levels. In conclusion, the study results indicate, for the first time, the new potential targets of melatonin in modulating morphine-induced CPP.
Collapse
Affiliation(s)
- Badrah S Alghamdi
- Department of Physiology, Neuroscience Unit, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.,Pre-Clinical Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Fahad S Alshehri
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| |
Collapse
|
6
|
Donepezil attenuates the development of morphine tolerance in rats with cancer-induced bone pain: The role of cortical N-methyl-D-aspartate receptors. Neurosci Lett 2021; 747:135678. [PMID: 33516802 DOI: 10.1016/j.neulet.2021.135678] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 01/11/2021] [Accepted: 01/22/2021] [Indexed: 12/23/2022]
Abstract
Cancer-induced bone pain (CIBP), which is associated with poor quality of life, is most commonly treated using opioids. However, long-term use of morphine for analgesia induces tolerance and can diminish the treatment's effectiveness. The mechanisms that underlie morphine tolerance have been reported to be related to the inflammation of the nervous system and hyperactivation of N-methyl-D-aspartate receptors (NMDARs). Donepezil is an anti-inflammatory and neuroprotective drug that is thought to alleviate morphine tolerance. In this study, we aimed to investigate the effect of three different dosages of donepezil (1, 1.5 and 2 mg/kg) on morphine tolerance in rats with CIBP, and the possible involvement of donepezil-mediated NMDAR subunit 1 (NR1). We found that donepezil can prolong the analgesic efficacy of morphine and delay the development of chronic morphine tolerance. Furthermore, continuous morphine injection increased the expression of NR1, and this was suppressed by co-administration with donepezil using both western blotting and immunofluorescence. Our findings demonstrate that donepezil has the potential to attenuate morphine tolerance, possibly by inhibiting NR1 activity in the cortex.
Collapse
|
7
|
Mesoporous Polydopamine Nanoparticles Attenuate Morphine Tolerance in Neuropathic Pain Rats by Inhibition of Oxidative Stress and Restoration of the Endogenous Antioxidant System. Antioxidants (Basel) 2021; 10:antiox10020195. [PMID: 33572871 PMCID: PMC7912557 DOI: 10.3390/antiox10020195] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/25/2021] [Accepted: 01/26/2021] [Indexed: 12/25/2022] Open
Abstract
Oxidative stress resulting from reactive oxygen species (ROS) is known to play a key role in numerous neurological disorders, including neuropathic pain. Morphine is one of the commonly used opioids for pain management. However, long-term administration of morphine results in morphine antinociceptive tolerance (MAT) through elevation of ROS and suppression of natural antioxidant defense mechanisms. Recently, mesoporous polydopamine (MPDA) nanoparticles (NPS) have been known to possess strong antioxidant properties. We speculated that morphine delivery through an antioxidant nanocarrier might be a reasonable strategy to alleviate MAT. MPDAs showed a high drug loading efficiency of ∼50%, which was much higher than conventional NPS. Spectral and in vitro studies suggest a superior ROS scavenging ability of NPS. Results from a rat neuropathic pain model demonstrate that MPDA-loaded morphine (MPDA@Mor) is efficient in minimizing MAT with prolonged analgesic effect and suppression of pro-inflammatory cytokines. Additionally, serum levels of liver enzymes and levels of endogenous antioxidants were measured in the liver. Treatment with free morphine resulted in elevated levels of liver enzymes and significantly lowered the activities of endogenous antioxidant enzymes in comparison with the control and MPDA@Mor-treated group. Histopathological examination of the liver revealed that MPDA@Mor can significantly reduce the hepatotoxic effects of morphine. Taken together, our current work will provide an important insight into the development of safe and effective nano-antioxidant platforms for neuropathic pain management.
Collapse
|
8
|
Alifarsangi A, Esmaeili-Mahani S, Sheibani V, Abbasnejad M. The citrus flavanone naringenin prevents the development of morphine analgesic tolerance and conditioned place preference in male rats. THE AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE 2021; 47:43-51. [PMID: 33006902 DOI: 10.1080/00952990.2020.1813296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Opioids are effective analgesics in the management of chronic pain. However, their clinical use is hindered by adverse side effects such as addiction and analgesic tolerance. Naringenin is a common polyphenolic constituent of the citrus fruits and is one of the most commonly consumed flavonoids within our regular diet. However, its influences on opioid tolerance and addiction have not yet been clarified. OBJECTIVES To examine the effect of different doses of naringenin on analgesic tolerance, conditioned place preference and neuroinflammation in morphine-exposed rats. METHODS Analgesic tolerance was induced by the injection of 10 mg/kg morphine twice daily for 8 days in 70 male Wistar rats. To evaluate the effect of naringenin on the development of morphine tolerance, different doses (10, 25 and 50 mg/kg i.p.) were injected 15 min before morphine. The tail-flick test was used to assess nociceptive threshold. Conditioned place preference test was used to evaluate morphine-seeking behaviors. The lumbar spinal cord was assayed to determine glial fibrillary acidic protein (GFAP) and cyclooxygenase-2 (COX-2) levels by Western blotting. RESULTS The data showed that naringenin could significantly prevent morphine tolerance (p < .001) and conditioned place preference. In addition, chronic morphine-induced GFAP and COX-2 overexpression was significantly reversed by 50 mg/kg naringenin (p < .05 and p < .01, respectively). CONCLUSION Our results suggest that naringenin may have a potential anti-tolerant/anti-addiction property against chronic morphine misuse and that this preventive effect is associated with its anti-neuroinflammatory effects.
Collapse
Affiliation(s)
- Atena Alifarsangi
- Laboratory of Molecular Neuroscience, Kerman Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.,Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Saeed Esmaeili-Mahani
- Laboratory of Molecular Neuroscience, Kerman Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.,Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Vahid Sheibani
- Laboratory of Molecular Neuroscience, Kerman Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Mehdi Abbasnejad
- Laboratory of Molecular Neuroscience, Kerman Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| |
Collapse
|
9
|
Bonavia LJ, Jackson J, Jurevics R. Posterior reversible encephalopathy syndrome in acute pancreatitis: a rare stroke mimic. BMJ Case Rep 2020; 13:13/9/e232228. [DOI: 10.1136/bcr-2019-232228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
We report a 71-year-old woman who presented with Posterior Reversible Encephalopathy Syndrome (PRES) in the setting of acute pancreatitis. On day 3 of her admission, she developed transient right-sided upper and lower limb weakness, reduced visual acuity and encephalopathy, initially regarded as an acute stroke. Brain MRI fluid-attenuated inversion recovery (FLAIR) T2 imaging performed the same day confirmed occipital and parietal hyperdensities consistent with PRES. Her blood pressure never exceeded 150/75 mm Hg throughout the course of the admission. Our case demonstrates PRES in the setting of acute pancreatitis with only a relatively moderate elevation in blood pressure. In order to prevent unnecessary intervention in the setting of presumed acute stroke, it is important to consider the potential differential diagnoses including PRES as rare masquerade of acute stroke or transient ischaemic attack.
Collapse
|
10
|
Ruhela D, Bhopale VM, Yang M, Yu K, Weintraub E, Greenblatt A, Thom SR. Blood-borne and brain-derived microparticles in morphine-induced anti-nociceptive tolerance. Brain Behav Immun 2020; 87:465-472. [PMID: 32001343 DOI: 10.1016/j.bbi.2020.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 01/06/2020] [Accepted: 01/24/2020] [Indexed: 01/08/2023] Open
Abstract
We hypothesized that elevations of microparticles (MPs) would occur with morphine administration to mice. Repetitive dosing to induce anti-nociceptive tolerance increases blood-borne MPs by 8-fold, and by 10-fold in deep cervical lymph nodes draining brain glymphatics. MPs express proteins specific to cells including neutrophils, microglia, astrocytes, neurons and oligodendrocytes. Interleukin (IL)-1β content of MPs increases 68-fold. IL-1β antagonist administration diminishes blood-borne and cervical lymph node MPs, and abrogates tolerance induction. Intravenous polyethylene glycol Telomer B, a surfactant that lyses MPs, and intraperitoneal methylnaltrexone also inhibit MPs elevations and tolerance. Critically, neutropenic mice do not develop anti-nociceptive tolerance, elevations of blood-borne or cervical node MPs. Immunohistochemical evidence for microglial activation by morphine does not correlated with the MPs response pattern. Neutrophil-derived MPs appear to be required for morphine-induced anti-nociceptive tolerance. Further, patients entering treatment for opioid use disorder exhibit similar MPs elevations as do tolerant mice.
Collapse
Affiliation(s)
| | | | - Ming Yang
- Department of Emergency Medicine, United States
| | - Kevin Yu
- Department of Emergency Medicine, United States
| | - Eric Weintraub
- Department of Psychiatry, University of Maryland, School of Medicine, United States
| | - Aaron Greenblatt
- Department of Psychiatry, University of Maryland, School of Medicine, United States
| | | |
Collapse
|
11
|
Fazli shojai E, Najafi M, Charkhpour M. Evaluating the Effects of Chronic Administration of Natural Honey on the Development of Dependence on Morphine in the Male Rats. PHARMACEUTICAL SCIENCES 2019. [DOI: 10.15171/ps.2019.35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background: According to the previous studies, the exact mechanism of dependence on opioids and withdrawal syndrome has not been fully understood but one of the most important mechanisms is the increase of pro-inflammatory cytokines in CNS. On the other way, previous studies showed that natural honey (NHO) has anti-inflammatory properties. This study was aimed to evaluate the effects of chronic administration of natural honey on the development of morphine dependence in male rats. Methods: Honey was prepared from Tarom Oliya region in Zanjan province. Experiments were performed on male Wistar rats weighing 225-275 g, randomly divided into 6 groups (n=8). The study groups included morphine group, the three doses of morphine plus honey group (at doses of 200,400 and 800 mg/kg, i.p.), the morphine plus vehicle group, and the saline group. The subcutaneous injections of additive doses of morphine were used for 9 days to create morphine dependency. On the 9th day, one hour after the morning dose of morphine, naloxone (4 mg/kg, i.p.) was injected, and symptoms of withdrawal syndrome were assessed for 60 minutes. Then, blood samples were taken to measure TNF-α. One-way ANOVA and Tukey tests were used to compare the results. P- Value of <0.05 was considered as statistically significant. Results: The results of this study showed that intraperitoneal injection of honey at 3 doses (200, 400 and 800 mg/kg with p <0.001) could significantly decrease the total score of the symptoms compared to the morphine-vehicle control group. Natural honey (NHO) could significantly decrease TNF-α at dose of 400 mg/kg. Conclusion: The results indicated that chronic administration of NHO had beneficial effects in reducing symptoms of morphine withdrawal syndrome, and this effect is probably due to the anti-inflammatory effect caused by the polyphenolic compounds in honey.<br />
Collapse
Affiliation(s)
- Elham Fazli shojai
- Student Research Committee, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Moslem Najafi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Charkhpour
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| |
Collapse
|
12
|
Zhang L, Meng J, Ban Y, Jalodia R, Chupikova I, Fernandez I, Brito N, Sharma U, Abreu MT, Ramakrishnan S, Roy S. Morphine tolerance is attenuated in germfree mice and reversed by probiotics, implicating the role of gut microbiome. Proc Natl Acad Sci U S A 2019; 116:13523-13532. [PMID: 31209039 PMCID: PMC6613141 DOI: 10.1073/pnas.1901182116] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Prolonged exposure to opioids results in analgesic tolerance, drug overdose, and death. The mechanism underlying morphine analgesic tolerance still remains unresolved. We show that morphine analgesic tolerance was significantly attenuated in germfree (GF) and in pan-antibiotic-treated mice. Reconstitution of GF mice with naïve fecal microbiota reinstated morphine analgesic tolerance. We further demonstrated that tolerance was associated with microbial dysbiosis with selective depletion in Bifidobacteria and Lactobacillaeae. Probiotics, enriched with these bacterial communities, attenuated analgesic tolerance in morphine-treated mice. These results suggest that probiotic therapy during morphine administration may be a promising, safe, and inexpensive treatment to prolong morphine's efficacy and attenuate analgesic tolerance. We hypothesize a vicious cycle of chronic morphine tolerance: morphine-induced gut dysbiosis leads to gut barrier disruption and bacterial translocation, initiating local gut inflammation through TLR2/4 activation, resulting in the activation of proinflammatory cytokines, which drives morphine tolerance.
Collapse
Affiliation(s)
- Li Zhang
- Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455
- Department of Surgery, University of Miami, Miami, FL 33136
| | - Jingjing Meng
- Department of Surgery, University of Miami, Miami, FL 33136
| | - Yuguang Ban
- Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL 33136
| | - Richa Jalodia
- Department of Surgery, University of Miami, Miami, FL 33136
| | | | - Irina Fernandez
- Department of Medicine, Division of Gastroenterology, University of Miami, Miami, FL 33136
| | - Nivis Brito
- Department of Medicine, Division of Gastroenterology, University of Miami, Miami, FL 33136
| | - Umakant Sharma
- Department of Surgery, University of Miami, Miami, FL 33136
| | - Maria T Abreu
- Department of Medicine, Division of Gastroenterology, University of Miami, Miami, FL 33136
| | | | - Sabita Roy
- Department of Surgery, University of Miami, Miami, FL 33136;
| |
Collapse
|
13
|
Basiri F, Rad A, Mahdian D, Molavi M, Amin B. Effects of glucosamine against morphine-induced antinociceptive tolerance and dependence in mice. J Biomed Sci 2019; 26:21. [PMID: 30782159 PMCID: PMC6380027 DOI: 10.1186/s12929-019-0513-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 02/11/2019] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND The most important limitations of morphine in pain therapy are its tolerance and dependence. In this study, we evaluated the protective effect of glucosamine against morphine-induced tolerance and dependence in mice. METHODS Mice received twice daily morphine (20 mg/kg, s.c.) alone, or along with orally administered glucosamine (500, 1000 and 2000 mg/kg), for 9 continuous days. To assess antinociceptive effect of morphine, percentage of maximal possible effect (%MPE) of animals exposed to thermal stimulus was measured in the hot plate test, 30 min after morphine administration. Test was performed on days 1, 3, 5, 7 and 9. The effect of glucosamine on the naloxone (5 mg/kg, i.p.)-precipitated morphine withdrawal, was also evaluated. Changes in brain gene expression levels of induced nitric oxide synthase (iNOS), enzyme responsible for nitric oxide generation, as well as pro-inflammatory mediator, tumor necrosis alpha (TNF-α) were measured in morphine tolerated animals, as well as after withdrawal by real-time polymerase chain reaction (RT-PCR). Protein content of TNF-α was evaluated via ELISA assay. RESULTS Tolerance to antinociceptive effect of morphine was developed after 7 days of morphine treatment. The concurrent administration of glucosamine (500, 1000 and 2000 mg/kg) with morphine, significantly inhibited tolerance development, on days 7 and 9. In addition, glucosamine ameliorated the naloxone-precipitated opioid withdrawal symptoms (tremor, jumping, teeth chattering, grooming). However, diarrhea was significantly improved only with the dose of 500 mg/kg. Increased mRNA expression of iNOS as well as TNF-α mRNA expression and protein, after both morphine tolerance and withdrawal, were considerably reduced by glucosamine (1000 mg/kg) in the morphine withdrawal animals. CONCLUSION These data support the utility of glucosamine in attenuating both tolerance to nociceptive effects of morphine as well as withdrawal-induced behavioral profile. Anti-oxidant and anti-inflammatory effects are responsible, at least in part, for the protective effects of this drug.
Collapse
Affiliation(s)
- Faezeh Basiri
- Student Research Committee, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Abolfazl Rad
- Cellular and Molecular Research Center, Department of Physiology and Pharmacology, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Davood Mahdian
- Cellular and Molecular Research Center, Department of Physiology and Pharmacology, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Mehdi Molavi
- Departement of Internal Medicine, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Bahareh Amin
- Cellular and Molecular Research Center, Department of Physiology and Pharmacology, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran.
| |
Collapse
|
14
|
Liu DQ, Zhou YQ, Gao F. Targeting Cytokines for Morphine Tolerance: A Narrative Review. Curr Neuropharmacol 2019; 17:366-376. [PMID: 29189168 PMCID: PMC6482476 DOI: 10.2174/1570159x15666171128144441] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 11/06/2017] [Accepted: 11/23/2017] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Despite its various side effects, morphine has been widely used in clinics for decades due to its powerful analgesic effect. Morphine tolerance is one of the major side effects, hindering its long-term usage for pain therapy. Currently, the thorough cellular and molecular mechanisms underlying morphine tolerance remain largely uncertain. METHODS We searched the PubMed database with Medical subject headings (MeSH) including 'morphine tolerance', 'cytokines', 'interleukin 1', 'interleukin 1 beta', 'interleukin 6', 'tumor necrosis factor alpha', 'interleukin 10', 'chemokines'. Manual searching was carried out by reviewing the reference lists of relevant studies obtained from the primary search. The searches covered the period from inception to November 1, 2017. RESULTS The expression levels of certain chemokines and pro-inflammatory cytokines were significantly increased in animal models of morphine tolerance. Cytokines and cytokine receptor antagonist showed potent effect of alleviating the development of morphine tolerance. CONCLUSION Cytokines play a fundamental role in the development of morphine tolerance. Therapeutics targeting cytokines may become alternative strategies for the management of morphine tolerance.
Collapse
Affiliation(s)
| | | | - Feng Gao
- Address correspondence to this author at the Tongji Hospital, Tongji Medical college, Huazhong University of Science and Technology, Wuhan, China; Tel: +86 27 83662853; E-mail:
| |
Collapse
|
15
|
Ignatowski TA, Spengler RN. Targeting tumor necrosis factor in the brain relieves neuropathic pain. World J Anesthesiol 2018; 7:10-19. [DOI: 10.5313/wja.v7.i2.10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/28/2018] [Accepted: 06/02/2018] [Indexed: 02/06/2023] Open
Abstract
Neuropathic pain is a chronic syndrome caused by direct damage to or disease of the somatosensory nervous system. The lack of safe, adequate and sustained pain relief offered by present analgesic treatments is most alarming. While many treatment options are available to manage chronic pain, such as antidepressants, non-steroidal anti-inflammatory agents, opioids, and anticonvulsants, chronic neuropathic pain remains largely unmanaged. Compounding the dilemma of ineffective chronic pain treatments is the need to provide relief from suffering and yet not contribute to the scourge of drug abuse. A recent epidemic of addiction and accidental drug prescription overdoses parallel the increased use of opioid treatment, even though opioids are rarely an effective treatment of relieving chronic pain. To make matters worse, opioids may contribute to exacerbating pain, and side-effects such as cognitive impairment, nausea, constipation, development of tolerance, as well as their potential for addiction and overdose deaths exist. Clearly, there is an urgent need for alternative, non-opiate treatment of chronic pain. Innovative discoveries of pertinent brain mechanisms and functions are key to developing effective, safe treatments. Pioneering work has revealed the essential effects of the pleiotropic mediator tumor necrosis factor (TNF) on brain functioning. These studies establish that TNF inhibits norepinephrine release from hippocampal neurons, and show that excess TNF production within the hippocampus occurs during neuropathic pain, which mobilizes additional mechanisms that further inhibit norepinephrine release. Significantly, it has been verified that elevated levels of TNF in the brain are actually required for neuropathic pain development. Since TNF decreases norepinephrine release in the brain, enhanced TNF levels would prevent engagement of the norepinephrine descending inhibitory neuronal pain pathways. Increased levels of TNF in the brain are therefore critical to the development of neuropathic pain. Therefore, strategies that decrease this enhanced TNF expression in the brain will have superior analgesic efficacy. We propose this novel approach of targeting the pathologically high levels of brain TNF as an effective strategy in the treatment of the devastating syndrome of chronic pain.
Collapse
Affiliation(s)
- Tracey A Ignatowski
- Department of Pathology and Anatomical Sciences and Program for Neuroscience, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, The State University of New York, Buffalo, NY 14203, United States
- NanoAxis, LLC, Clarence, NY 14031, United States
| | | |
Collapse
|
16
|
Seyedaghamiri F, Heysieattalab S, Hosseinmardi N, Janahmadi M, Elahi-Mahani A, Salari F, Golpayegani M, Khoshbouei H. Hippocampal glial cells modulate morphine-induced behavioral responses. Physiol Behav 2018; 191:37-46. [DOI: 10.1016/j.physbeh.2018.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/01/2018] [Accepted: 04/02/2018] [Indexed: 11/28/2022]
|
17
|
Lin CP, Lu DH. Role of Neuroinflammation in Opioid Tolerance: Translational Evidence from Human-to-Rodent Studies. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1099:125-139. [DOI: 10.1007/978-981-13-1756-9_11] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
18
|
Zhou P, Jiang J, Yan H, Li Y, Zhao J, Wang X, Su R, Gong Z. ABIN-1 Negatively Regulates μ-Opioid Receptor Function. Mol Pharmacol 2017; 93:36-48. [PMID: 29237725 DOI: 10.1124/mol.117.109009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 12/01/2017] [Indexed: 01/26/2023] Open
Abstract
The μ-opioid receptor (MOR) is a Gi/o protein-coupled receptor that mediates analgesic, euphoric, and reward effects. Using a bacterial two-hybrid screen, we reported that the carboxyl tail of the rat MOR associates with A20-binding inhibitor of nuclear factor κB (ABIN-1). This interaction was confirmed by direct protein-protein binding and coimmunoprecipitation of MOR and ABIN-1 proteins in cell lysates. Saturation binding studies showed that ABIN-1 had no effect on MOR binding. However, the interaction of ABIN-1 and MOR inhibited the activation of G proteins induced by DAMGO ([d-Ala2,N-Me-Phe4,Gly5-ol]-Enkephalin). MOR phosphorylation, ubiquitination, and internalization induced by DAMGO were decreased in Chinese hamster ovary cells that coexpressed MOR and ABIN-1. The suppression of forskolin-stimulated adenylyl cyclase by DAMGO was also inhibited by the interaction of ABIN-1 with MOR. In addition, extracellular signal-regulated kinase activation was also negatively regulated by overexpression of ABIN-1. These data suggest that ABIN-1 is a negative coregulator of MOR activation, phosphorylation, and internalization in vitro. ABIN-1 also inhibited morphine-induced hyperlocomotion in zebrafish larvae (AB strain). By utilization of an antisense morpholino oligonucleotide (MO) gene knockdown technology, the ABIN-1 MO-injected zebrafish larvae showed a significant increase (approximately 60%) in distance moved compared with control MO-injected larvae after acute morphine treatment (P < 0.01). Taken together, ABIN-1 negatively regulates MOR function in vitro and in vivo.
Collapse
Affiliation(s)
- Peilan Zhou
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Jiebing Jiang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Hui Yan
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Yulei Li
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Junru Zhao
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Xiao Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Ruibin Su
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Zehui Gong
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| |
Collapse
|
19
|
A new pharmacological role for thalidomide: Attenuation of morphine-induced tolerance in rats. ACTA ACUST UNITED AC 2016; 54:65-9. [PMID: 27440278 DOI: 10.1016/j.aat.2016.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 05/14/2016] [Accepted: 06/16/2016] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Tolerance to the analgesic effect is the main side effect of chronic administration of opioids. Several drugs have been studied to try to find agents to prevent the development of this phenomenon. In the present study we aimed to evaluate the effect of thalidomide on morphine-induced tolerance to the analgesic effect. METHODS Groups of male rats were randomly rendered and received daily morphine in combination with thalidomide vehicle or thalidomide (2.5 mg/kg, 5 mg/kg, or 10 mg/kg, intraperitoneally). Nociception was measured using the plantar test apparatus. Latency time was recorded when the animal reacted to the light stimulus; licking or raising its hind paw. Treatments and evaluations continued until completion of tolerance to the analgesic effect of morphine. RESULTS Our findings indicated that tolerance was achieved following 11 days of morphine administration, while thalidomide postponed the day of tolerance completion for 4 days (2.5 mg/kg and 5 mg/kg thalidomide) or 10 days (10 mg/kg thalidomide). Moreover, thalidomide prevented the morphine-induced shift to the right of the ED50 in the dose-response curve. CONCLUSION It was concluded that thalidomide attenuated the morphine-induced tolerance to the analgesic effect.
Collapse
|
20
|
Prolonged Morphine Exposure Induces Increased Firm Adhesion in an in Vitro Model of the Blood-Brain Barrier. Int J Mol Sci 2016; 17:ijms17060916. [PMID: 27294916 PMCID: PMC4926449 DOI: 10.3390/ijms17060916] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 05/25/2016] [Accepted: 05/31/2016] [Indexed: 11/17/2022] Open
Abstract
The blood-brain barrier (BBB) has been defined as a critically important protective barrier that is involved in providing essential biologic, physiologic, and immunologic separation between the central nervous system (CNS) and the periphery. Insults to the BBB can cause overall barrier damage or deregulation of the careful homeostasis maintained between the periphery and the CNS. These insults can, therefore, yield numerous phenotypes including increased overall permeability, interendothelial gap formation, alterations in cytokine and chemokine secretion, and accelerated cellular passage. The current studies expose the human brain microvascular endothelial cell line, hCMEC/D3, to prolonged morphine exposure and aim to uncover the mechanisms underlying alterations in barrier function in vitro. These studies show alterations in the mRNA and protein levels of the cellular adhesion molecules (CAMs) intercellular adhesion molecule-1, vascular cell adhesion molecule-1, and activated leukocyte cell adhesion molecule that correlate with an increased firm adhesion of the CD3⁺ subpopulation of peripheral blood mononuclear cells (PBMCs). Overall, these studies suggest that prolonged morphine exposure may result in increased cell migration into the CNS, which may accelerate pathological processes in many diseases that involve the BBB.
Collapse
|
21
|
Lin SH, Huang YN, Kao JH, Tien LT, Tsai RY, Wong CS. Melatonin reverses morphine tolerance by inhibiting microglia activation and HSP27 expression. Life Sci 2016; 152:38-43. [PMID: 27012766 DOI: 10.1016/j.lfs.2016.03.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 03/06/2016] [Accepted: 03/17/2016] [Indexed: 01/14/2023]
Abstract
AIMS Melatonin has been reported to attenuate opioid tolerance. In this study, we explored the possible mechanism of melatonin in diminishing morphine tolerance. MAIN METHODS Two intrathecal (i.t.) catheters were implanted in male Wistar rats for drug delivery. One was linked to a mini-osmotic pump for morphine or saline infusion. On the seventh day, 50μg of melatonin or vehicle was injected through the other catheter instantly after discontinuation of morphine or saline infusion; 3h later, 15μg of morphine or saline was injected. The antinociceptive response was then measured using the tail-flick test every 30min for 120min. KEY FINDINGS The results showed that chronic morphine infusion elicited antinociceptive tolerance and upregulated heat shock protein 27 (HSP27) expression in the dorsal horn of the rat spinal cord. Melatonin pretreatment partially restored morphine's antinociceptive effect in morphine-tolerant rats and reversed morphine-induced HSP27 upregulation. In addition, chronic morphine infusion induced microglial cell activation and was reversed by melatonin treatment. SIGNIFICANCE The present study provides evidence that melatonin, acting via inhibiting morphine-induced neuroinflammation, can be useful as a therapeutic adjuvant for patients under long-term opioid treatment for pain relief.
Collapse
Affiliation(s)
- Sheng-Hsiung Lin
- Graduate Institute of Medical Science, National Defense Medical Center, Taipei City, Taiwan; Medical Service Office, Tri-Service General Hospital Songshang Branch, Taipei City, Taiwan
| | - Ya-Ni Huang
- Department of Nursing, Hsin Sheng Junior College of Medical Care and Management, Taoyuan City, Taiwan
| | - Jen-Hsin Kao
- Department of Anesthesiology, Cathay General Hospital, Taipei City, Taiwan; Cathay Medical Research Institute, Cathay General Hospital, Taipei City, Taiwan
| | - Lu-Tai Tien
- School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan
| | - Ru-Yin Tsai
- Department of Nursing, Da-Yeh University, Changhua City, Taiwan
| | - Chih-Shung Wong
- Graduate Institute of Medical Science, National Defense Medical Center, Taipei City, Taiwan; Department of Anesthesiology, Cathay General Hospital, Taipei City, Taiwan; School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan.
| |
Collapse
|
22
|
Habibi-Asl B, Vaez H, Aghaie N, Hasanpour-Aghdam S, Parvizpur A, Chakhpur M, Mahmoudi J, Eteraf-Oskouei T, Pishdad S, Ghanbarzadeh S. Attenuation of Morphine-Induced Tolerance and Dependency by Pretreatment with Magnesium Sulfate and Amitriptyline in Male Mice. PHARMACEUTICAL SCIENCES 2015. [DOI: 10.15171/ps.2015.36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
|
23
|
Lin SL, Chang FL, Ho SY, Charoenkwan P, Wang KW, Huang HL. Predicting Neuroinflammation in Morphine Tolerance for Tolerance Therapy from Immunostaining Images of Rat Spinal Cord. PLoS One 2015; 10:e0139806. [PMID: 26437460 PMCID: PMC4593634 DOI: 10.1371/journal.pone.0139806] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 09/17/2015] [Indexed: 02/07/2023] Open
Abstract
Long-term morphine treatment leads to tolerance which attenuates analgesic effect and hampers clinical utilization. Recent studies have sought to reveal the mechanism of opioid receptors and neuroinflammation by observing morphological changes of cells in the rat spinal cord. This work proposes a high-content screening (HCS) based computational method, HCS-Morph, for predicting neuroinflammation in morphine tolerance to facilitate the development of tolerance therapy using immunostaining images for astrocytes, microglia, and neurons in the spinal cord. HCS-Morph first extracts numerous HCS-based features of cellular phenotypes. Next, an inheritable bi-objective genetic algorithm is used to identify a minimal set of features by maximizing the prediction accuracy of neuroinflammation. Finally, a mathematic model using a support vector machine with the identified features is established to predict drug-treated images to assess the effects of tolerance therapy. The dataset consists of 15 saline controls (1 μl/h), 15 morphine-tolerant rats (15 μg/h), and 10 rats receiving a co-infusion of morphine (15 μg/h) and gabapentin (15 μg/h, Sigma). The three individual models of astrocytes, microglia, and neurons for predicting neuroinflammation yielded respective Jackknife test accuracies of 96.67%, 90.00%, and 86.67% on the 30 rats, and respective independent test accuracies of 100%, 90%, and 60% on the 10 co-infused rats. The experimental results suggest that neuroinflammation activity expresses more predominantly in astrocytes and microglia than in neuron cells. The set of features for predicting neuroinflammation from images of astrocytes comprises mean cell intensity, total cell area, and second-order geometric moment (relating to cell distribution), relevant to cell communication, cell extension, and cell migration, respectively. The present investigation provides the first evidence for the role of gabapentin in the attenuation of morphine tolerance from phenotypic changes of astrocytes and microglia. Based on neuroinflammation prediction, the proposed computer-aided image diagnosis system can greatly facilitate the development of tolerance therapy with anti-inflammatory drugs.
Collapse
Affiliation(s)
- Shinn-Long Lin
- Department of Anesthesiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
| | - Fang-Lin Chang
- Department of Anesthesiology, Kang-Ning General Hospital, Taipei, Taiwan
| | - Shinn-Ying Ho
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Phasit Charoenkwan
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan
| | - Kuan-Wei Wang
- Institute of Molecular Medicine and Bioengineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Hui-Ling Huang
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
- * E-mail:
| |
Collapse
|
24
|
Protective effect of pioglitazone on morphine-induced neuroinflammation in the rat lumbar spinal cord. J Biomed Sci 2015; 22:82. [PMID: 26394827 PMCID: PMC4580127 DOI: 10.1186/s12929-015-0187-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 09/10/2015] [Indexed: 12/13/2022] Open
Abstract
Background Morphine-induced tolerance is associated with the spinal neuroinflammation. The aim of this study was to explore the effects of oral administration of the pioglitazone, the peroxisome proliferator activated receptor gamma (PPAR-γ) agonist, on the morphine-induced neuroinflammation in the lumbar region of the male Wistar rat spinal cord. Results Co-administration of the pioglitazone with morphine not only attenuated morphine-induced tolerance, but also prevented the up-regulation of pro-inflammatory cytokines (tumor necrosis factor alpha, interleukin-1beta, and interleukin 6) and nuclear factor-kappa B activity. Administration of the GW-9662 antagonized the above mentioned effects of the pioglitazone. Conclusions It is concluded that oral administration of the pioglitazone attenuates morphine-induced tolerance and the neuroinflammation in the lumbar region of the rat spinal cord. This action of the pioglitazone may be, at least in part, due to an interaction with the spinal pro-inflammatory cytokine expression and the nuclear factor-kappa B activity.
Collapse
|
25
|
Xiao Z, Li YY, Sun MJ. Activation of P2X7 receptors in the midbrain periaqueductal gray of rats facilitates morphine tolerance. Pharmacol Biochem Behav 2015; 135:145-53. [PMID: 26054441 DOI: 10.1016/j.pbb.2015.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 05/27/2015] [Accepted: 06/04/2015] [Indexed: 02/01/2023]
Abstract
Opiates such as morphine exhibit analgesic effect in various pain models, but repeated and chronic morphine administration may develop resistance to antinociception. The purinergic signaling system is involved in the mechanisms of pain modulation and morphine tolerance. This study aimed to determine whether the P2X7 receptor in the ventrolateral midbrain periaqueductal gray (vlPAG) is involved in morphine tolerance. Development of tolerance to the antinociceptive effect of morphine was induced in normal adult male Sprague-Dawley (SD) rats through subcutaneous injection of morphine (10mg/kg). The analgesic effect of morphine (5mg/kg, i.p.) was assessed by measuring mechanical withdrawal thresholds (MWTs) in rats with an electronic von Frey anesthesiometer. The expression levels and distribution of the P2X7 receptor in the vlPAG was evaluated through Western blot analysis and immunohistochemistry. The acute effects of intra-vlPAG injection of the selective P2X7 receptor agonist Bz-ATP, the selective P2X7 receptor antagonist A-740003, or antisense oligodeoxynucleotide (AS ODN) targeting the P2X7 receptor on morphine-treated rats were also observed. Results demonstrated that repeated morphine administration decreased the mechanical pain thresholds. By contrast, the expression of the P2X7 receptor protein was up-regulated in the vlPAG in morphine tolerant rats. The percent changes in MWT were markedly but only transiently attenuated by intra-vlPAG injection of Bz-ATP (9nmol/0.3μL) but elevated by A-740003 at doses of 10 and 100nmol/0.3μL. AS ODN (15nmol/0.3μL) against the P2X7 receptor reduced the development of chronic morphine tolerance in rats. These results suggest that the development of antinociceptive tolerance to morphine is partially mediated by activating the vlPAG P2X7 receptors. The present data also suggest that the P2X7 receptors may be a therapeutic target for improving the analgesic effect of morphine in treatments of pain when morphine tolerance occurs.
Collapse
Affiliation(s)
- Zhi Xiao
- Research Center for Medicine & Biology, Zunyi Medical University, Zunyi, Guizhou 563003, PR China.
| | - You-Yan Li
- Graduate School, Zunyi Medical University, Zunyi, Guizhou 563003, PR China
| | - Meng-Jie Sun
- Graduate School, Zunyi Medical University, Zunyi, Guizhou 563003, PR China
| |
Collapse
|
26
|
Lin CP, Kang KH, Lin TH, Wu MY, Liou HC, Chuang WJ, Sun WZ, Fu WM. Role of Spinal CXCL1 (GROα) in Opioid Tolerance. Anesthesiology 2015; 122:666-76. [DOI: 10.1097/aln.0000000000000523] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Abstract
Background:
The pivotal role of glial activation and up-regulated inflammatory mediators in the opioid tolerance has been confirmed in rodents but not yet in humans. Here, the authors investigated the intraspinal cytokine and chemokine profiles of opioid-tolerant cancer patients; and to determine if up-regulated chemokines could modify opioid tolerance in rats.
Methods:
Cerebrospinal fluid samples from opioid-tolerant cancer patients and opioid-naive subjects were compared. The cerebrospinal fluid levels of tumor necrosis factor-alpha, CXCL1, CXCL10, CCL2, and CX3CL1 were assayed. The rat tail flick test was utilized to assess the effects of intrathecal CXCL1 on morphine-induced acute antinociception and analgesic tolerance.
Results:
CXCL1 level in cerebrospinal fluid was significantly up-regulated in the opioid-tolerant group (n = 30, 18.8 pg/ml vs. 13.2 pg/ml, P = 0.02) and was positively correlated (r2 = 0.49, P < 0.01) with opioid dosage. In rat experiment, after induction of tolerance by morphine infusion, the spinal cord CXCL1 messenger RNA was up-regulated to 32.5 ± 11.9-fold. Although CXCL1 infusion alone did not affect baseline tail-flick latency, the analgesic efficacy of a single intraperitoneal injection of morphine dropped significantly on day 1 to day 3 after intrathecal infusion of CXCL1. After establishing tolerance by intrathecal continuous infusion of morphine, its development was accelerated by coadministration of CXCL1 and attenuated by coadministration of CXCL1-neutralizing antibody or CXCR2 antagonist.
Conclusions:
CXCL1 is up-regulated in both opioid-tolerant patients and rodents. The onset and extent of opioid tolerance was affected by antagonizing intrathecal CXCL1/CXCR2 signaling. Therefore, the CXCL1/CXCR2 signal pathway may be a novel target for the treatment of opioid tolerance.
Collapse
Affiliation(s)
- Chih-Peng Lin
- From the Department of Anesthesiology (C.-P.L., W.-Z.S.) and Department of Oncology (C.-P.L.), National Taiwan University Hospital, Taipei, Taiwan; Department of Pharmacology (C.-P.L., K.-H.K., T.-H.L., M.-Y.W., H.-C.L., W.-M.F.), College of Medicine, National Taiwan University, Taipei, Taiwan; and Institute of Basic Medical Sciences (W.-J.C.), College of Medicine, National Cheng Kung University,
| | - Kai-Hsiang Kang
- From the Department of Anesthesiology (C.-P.L., W.-Z.S.) and Department of Oncology (C.-P.L.), National Taiwan University Hospital, Taipei, Taiwan; Department of Pharmacology (C.-P.L., K.-H.K., T.-H.L., M.-Y.W., H.-C.L., W.-M.F.), College of Medicine, National Taiwan University, Taipei, Taiwan; and Institute of Basic Medical Sciences (W.-J.C.), College of Medicine, National Cheng Kung University,
| | - Tzu-Hung Lin
- From the Department of Anesthesiology (C.-P.L., W.-Z.S.) and Department of Oncology (C.-P.L.), National Taiwan University Hospital, Taipei, Taiwan; Department of Pharmacology (C.-P.L., K.-H.K., T.-H.L., M.-Y.W., H.-C.L., W.-M.F.), College of Medicine, National Taiwan University, Taipei, Taiwan; and Institute of Basic Medical Sciences (W.-J.C.), College of Medicine, National Cheng Kung University,
| | - Ming-Yueh Wu
- From the Department of Anesthesiology (C.-P.L., W.-Z.S.) and Department of Oncology (C.-P.L.), National Taiwan University Hospital, Taipei, Taiwan; Department of Pharmacology (C.-P.L., K.-H.K., T.-H.L., M.-Y.W., H.-C.L., W.-M.F.), College of Medicine, National Taiwan University, Taipei, Taiwan; and Institute of Basic Medical Sciences (W.-J.C.), College of Medicine, National Cheng Kung University,
| | - Houng-Chi Liou
- From the Department of Anesthesiology (C.-P.L., W.-Z.S.) and Department of Oncology (C.-P.L.), National Taiwan University Hospital, Taipei, Taiwan; Department of Pharmacology (C.-P.L., K.-H.K., T.-H.L., M.-Y.W., H.-C.L., W.-M.F.), College of Medicine, National Taiwan University, Taipei, Taiwan; and Institute of Basic Medical Sciences (W.-J.C.), College of Medicine, National Cheng Kung University,
| | - Woei-Jer Chuang
- From the Department of Anesthesiology (C.-P.L., W.-Z.S.) and Department of Oncology (C.-P.L.), National Taiwan University Hospital, Taipei, Taiwan; Department of Pharmacology (C.-P.L., K.-H.K., T.-H.L., M.-Y.W., H.-C.L., W.-M.F.), College of Medicine, National Taiwan University, Taipei, Taiwan; and Institute of Basic Medical Sciences (W.-J.C.), College of Medicine, National Cheng Kung University,
| | - Wei-Zen Sun
- From the Department of Anesthesiology (C.-P.L., W.-Z.S.) and Department of Oncology (C.-P.L.), National Taiwan University Hospital, Taipei, Taiwan; Department of Pharmacology (C.-P.L., K.-H.K., T.-H.L., M.-Y.W., H.-C.L., W.-M.F.), College of Medicine, National Taiwan University, Taipei, Taiwan; and Institute of Basic Medical Sciences (W.-J.C.), College of Medicine, National Cheng Kung University,
| | - Wen-Mei Fu
- From the Department of Anesthesiology (C.-P.L., W.-Z.S.) and Department of Oncology (C.-P.L.), National Taiwan University Hospital, Taipei, Taiwan; Department of Pharmacology (C.-P.L., K.-H.K., T.-H.L., M.-Y.W., H.-C.L., W.-M.F.), College of Medicine, National Taiwan University, Taipei, Taiwan; and Institute of Basic Medical Sciences (W.-J.C.), College of Medicine, National Cheng Kung University,
| |
Collapse
|
27
|
Habibi-Asl B, Vaez H, Najafi M, Bidaghi A, Ghanbarzadeh S. Attenuation of morphine-induced dependence and tolerance by ceftriaxone and amitriptyline in mice. ACTA ACUST UNITED AC 2014; 52:163-8. [PMID: 25557842 DOI: 10.1016/j.aat.2014.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 11/07/2014] [Accepted: 11/12/2014] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Tolerance to and dependence on the analgesic effect of opioids is a pharmacological phenomenon that occurs after their prolonged administration. OBJECTIVE The aim of this study was to evaluate the protective effects of ceftriaxone and amitriptyline on the development of morphine-induced tolerance and dependence. METHODS In this study, 18 groups (9 groups each for tolerance and dependency tests) of mice (n = 8) received saline [10 mL/kg, intraperitoneally (i.p.)], morphine (50 mg/kg, i.p.), ceftriaxone (50 mg/kg, i.p., 100 mg/kg, i.p., and 200 mg/kg, i.p.), amitriptyline (5 mg/kg, i.p., 10 mg/kg, i.p., and 15 mg/kg, i.p.), or a combination of ceftriaxone (50 mg/kg, i.p.) and amitriptyline (5 mg/kg, i.p.) once per day for 4 days for investigation and comparison of the effects of ceftriaxone and amitriptyline on the prevention of dependency and tolerance to morphine. Tolerance was assessed with administration of morphine (9 mg/kg, i.p.) and using the hot plate test on the 5(th) day. In dependency tests, withdrawal symptoms were assessed on the 4(th) day for each animal 30 minutes after the administration of naloxone (4 mg/kg, i.p.; 2 hours after the last dose of morphine). RESULTS It was found that treatment with ceftriaxone or amitriptyline attenuated the development of tolerance to the antinociceptive effect of morphine and also reduced naloxone-precipitated withdrawal jumping and standing on feet. Furthermore, coadministration of ceftriaxone and amitriptyline at low doses (50 mg/kg, i.p. and 5 mg/kg, i.p., respectively) prior to morphine injection also decreased both morphine-induced tolerance and dependence. CONCLUSION Results indicate that the treatment with ceftriaxone and amitriptyline, alone or in combination, could attenuate the development of morphine-induced tolerance and dependence.
Collapse
Affiliation(s)
- Bohlul Habibi-Asl
- Department of Pharmacology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Haleh Vaez
- Department of Pharmacology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Moslem Najafi
- Department of Pharmacology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ali Bidaghi
- Student Research Committee, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeed Ghanbarzadeh
- Student Research Committee, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran; Research Center for Pharmaceutical Nanotechnology and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
| |
Collapse
|
28
|
Bai L, Zhai C, Han K, Li Z, Qian J, Jing Y, Zhang W, Xu JT. Toll-like receptor 4-mediated nuclear factor-κB activation in spinal cord contributes to chronic morphine-induced analgesic tolerance and hyperalgesia in rats. Neurosci Bull 2014; 30:936-948. [PMID: 25446875 DOI: 10.1007/s12264-014-1483-7] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 08/12/2014] [Indexed: 12/22/2022] Open
Abstract
Nuclear factor kappa B (NF-κB) in the spinal cord is involved in pro-inflammatory cytokine-mediated pain facilitation. However, the role of NF-κB activation in chronic morphine-induced analgesic tolerance and the underlying mechanisms remain unclear. In the present study, we found that the level of phosphorylated NF-κB p65 (p-p65) was increased in the dorsal horn of the lumbar 4-6 segments after intrathecal administration of morphine for 7 consecutive days, and the p-p65 was co-localized with neurons and astrocytes. The expression of TNF-α and IL-1β was also increased in the same area. In addition, pretreatment with pyrrolidinedithiocarbamate (PDTC) or SN50, inhibitors of NF-κB, prevented the development of morphine analgesic tolerance and alleviated morphine withdrawal-induced allodynia and hyperalgesia. The increase in TNF-α and IL-1β expression induced by chronic morphine exposure was also partially blocked by PDTC pretreatment. In another experiment, rats receiving PDTC or SN50 beginning on day 7 of morphine injection showed partial recovery of the anti-nociceptive effects of morphine and attenuation of the withdrawal-induced abnormal pain. Meanwhile, intrathecal pretreatment with lipopolysaccharide from Rhodobacter sphaeroides, an antagonist of toll-like receptor 4 (TLR4), blocked the activation of NF-κB, and prevented the development of morphine tolerance and withdrawal-induced abnormal pain. These data indicated that TLR4-mediated NF-κB activation in the spinal cord is involved in the development and maintenance of morphine analgesic tolerance and withdrawal-induced pain hypersensitivity.
Collapse
Affiliation(s)
- Liying Bai
- Department of Anesthesiology, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China.,Department of Physiology, Medical School of Zhengzhou University, Zhengzhou, 450001, China
| | - Caihong Zhai
- Department of Physiology, Medical School of Zhengzhou University, Zhengzhou, 450001, China
| | - Kun Han
- Department of Physiology, Medical School of Zhengzhou University, Zhengzhou, 450001, China
| | - Zhisong Li
- Department of Anesthesiology, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China
| | - Junliang Qian
- Department of Physiology, Medical School of Zhengzhou University, Zhengzhou, 450001, China
| | - Ying Jing
- Department of Physiology, Medical School of Zhengzhou University, Zhengzhou, 450001, China
| | - Wei Zhang
- Department of Anesthesiology, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China.
| | - Ji-Tian Xu
- Department of Anesthesiology, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China. .,Department of Physiology, Medical School of Zhengzhou University, Zhengzhou, 450001, China.
| |
Collapse
|
29
|
Ghavimi H, Charkhpour M, Ghasemi S, Mesgari M, Hamishehkar H, Hassanzadeh K, Arami S, Hassanzadeh K. Pioglitazone prevents morphine antinociceptive tolerance via ameliorating neuroinflammation in rat cerebral cortex. Pharmacol Rep 2014; 67:78-84. [PMID: 25560579 DOI: 10.1016/j.pharep.2014.08.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 08/05/2014] [Accepted: 08/06/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Opioid induced neuroinflammation is shown to be implicated in opioid analgesic tolerance development. In the present study the effect of pioglitazone on morphine-induced tolerance and neuroinflammation in the cerebral cortex of the rat was investigated. MATERIALS AND METHODS Various groups of rats received morphine (10mg/kg; ip) and vehicle (po), or morphine (10mg/kg) and pioglitazone (20 or 40 mg/kg; po) once a day for 17 days. In order to determine the possible involvement of PPAR-γ in the pioglitazone effect, one group of rats received PPAR-γ antagonist, GW-9662 (2mg/kg; sc), and pioglitazone (40 mg/kg) and morphine once daily for 17 days. Nociception was assessed using a tail flick apparatus and the percentage of the maximal possible effect was calculated as well. On 18th day, 2h after the last morphine injection, the cerebral cortex of the animals were harvested and the tissue levels of tumour necrosis factor alpha, interleukin-1beta, interleukin-6, interleukin-10 and nuclear factor-kappa B activity were determined. RESULTS Co-administration of pioglitazone (40 mg/kg) with morphine not only attenuated morphine-induced tolerance, but also prevented the up-regulation of pro-inflammatory cytokines (tumour necrosis factor alpha, interleukin-1beta, interleukin-6) and nuclear factor-kappa B activity in the rat cerebral cortex. Moreover, GW-9662 (2mg/kg) administration 30 min before pioglitazone, antagonized the above mentioned pioglitazone-induced effects. CONCLUSION It is concluded that oral administration of pioglitazone attenuates morphine-induced tolerance. This effect of pioglitazone may be, at least in part, due to its anti-inflammatory property which suppressed the cortical pro-inflammatory cytokine and inhibited of nuclear factor-kappa B activity.
Collapse
Affiliation(s)
- Hamed Ghavimi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran; Biotechnology Research Center and Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Charkhpour
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeed Ghasemi
- Department of Medicinal Chemistry, Faculty of Pharmacy, Rasht University of Medical Sciences, Gilan, Iran
| | - Mehran Mesgari
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Hamishehkar
- Department of Clinical Pharmacy, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Katayoun Hassanzadeh
- Department of Physiology and Pharmacology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Sanam Arami
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Kambiz Hassanzadeh
- Cellular and Molecular Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.
| |
Collapse
|
30
|
Tumor necrosis factor alpha: a link between neuroinflammation and excitotoxicity. Mediators Inflamm 2014; 2014:861231. [PMID: 24966471 PMCID: PMC4055424 DOI: 10.1155/2014/861231] [Citation(s) in RCA: 444] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 05/07/2014] [Indexed: 02/08/2023] Open
Abstract
Tumor necrosis factor alpha (TNF-α) is a proinflammatory cytokine that exerts both homeostatic and pathophysiological roles in the central nervous system. In pathological conditions, microglia release large amounts of TNF-α; this de novo production of TNF-α is an important component of the so-called neuroinflammatory response that is associated with several neurological disorders. In addition, TNF-α can potentiate glutamate-mediated cytotoxicity by two complementary mechanisms: indirectly, by inhibiting glutamate transport on astrocytes, and directly, by rapidly triggering the surface expression of Ca+2 permeable-AMPA receptors and NMDA receptors, while decreasing inhibitory GABAA receptors on neurons. Thus, the net effect of TNF-α is to alter the balance of excitation and inhibition resulting in a higher synaptic excitatory/inhibitory ratio. This review summarizes the current knowledge of the cellular and molecular mechanisms by which TNF-α links the neuroinflammatory and excitotoxic processes that occur in several neurodegenerative diseases, but with a special emphasis on amyotrophic lateral sclerosis (ALS). As microglial activation and upregulation of TNF-α expression is a common feature of several CNS diseases, as well as chronic opioid exposure and neuropathic pain, modulating TNF-α signaling may represent a valuable target for intervention.
Collapse
|
31
|
Functional Expression of Drug Transporters in Glial Cells. PHARMACOLOGY OF THE BLOOD BRAIN BARRIER: TARGETING CNS DISORDERS 2014; 71:45-111. [DOI: 10.1016/bs.apha.2014.06.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
32
|
Abstract
This paper is the thirty-fifth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2012 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); and immunological responses (Section 17).
Collapse
Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, Flushing, NY 11367, United States.
| |
Collapse
|