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Irvine KA, Shi XY, Ferguson AR, Clark JD. Designer Receptor Exclusively Activated by Designer Drug (DREADD)-Mediated Activation of the Periaqueductal Gray Restores Nociceptive Descending Inhibition After Traumatic Brain Injury in Rats. J Neurotrauma 2024. [PMID: 38588130 DOI: 10.1089/neu.2024.0031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024] Open
Abstract
Traumatic brain injury (TBI) patients frequently experience chronic pain that can enhance their suffering and significantly impair rehabilitative efforts. Clinical studies suggest that damage to the periaqueductal gray matter (PAG) following TBI, a principal center involved in endogenous pain control, may underlie the development of chronic pain. We hypothesized that TBI would diminish the usual pain control functions of the PAG, but that directly stimulating this center using a chemogenetic approach would restore descending pain modulation. We used a well-characterized lateral fluid percussion model (1.3 ± 0.1 atm) of TBI in male rats (n = 271) and measured hindpaw mechanical nociceptive withdrawal thresholds using von Frey filaments. To investigate the role of the PAG in pain both before and after TBI, we activated the neurons of the PAG using a Designer Receptor Exclusively Activated by Designer Drug (DREADD) viral construct. Immunohistochemical analysis of brain tissue was used to assess the location and confirm the appropriate expression of the viral constructs in the PAG. Activation of the PAG DREADD using clozapine N-oxide (CNO) caused hindpaw analgesia that could be blocked using opioid receptor antagonist, naloxone, in uninjured but not TBI rats. Due to the importance of descending serotonergic signaling in modulating nociception, we ablated spinal serotonin signaling using 5,7-DHT. This treatment strongly reduced CNO-mediated anti-nociceptive effects in TBI but not uninjured rats. To define the serotonergic receptor(s) required for the CNO-stimulated effects in TBI rats, we administered 5-HT7 (SB-269970) and 5-HT1A (WAY-100635) receptor antagonists but observed no effects. The selective 5-HT2A receptor antagonist ketanserin, however, blocked CNO's effects in the DREADD expressing TBI but not DREADD expressing sham TBI animals. Blockade of alpha-1 adrenergic receptors with prazosin also had no effect after TBI. Descending pain control originating in the PAG is mediated through opioid receptors in uninjured rats. TBI, however, fundamentally alters the descending nociceptive control circuitry such that serotonergic influences predominate, and those are mediated by the 5-HT2A receptor. These results provide further evidence that the PAG is a key target for anti-nociception after TBI.
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Affiliation(s)
- Karen-Amanda Irvine
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, California, USA
- Anesthesiology Service Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA
| | - Xiao-You Shi
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, California, USA
- Anesthesiology Service Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA
| | - Adam R Ferguson
- Brain and Spinal Injury Center, Department of Neurosurgery, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, California, USA
- San Francisco Veterans Affairs Healthcare System, San Francisco, California, USA
| | - J David Clark
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, California, USA
- Anesthesiology Service Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA
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2
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Miyahara Y, Funahashi H, Haruta-Tsukamoto A, Kogoh Y, Kanemaru-Kawazoe A, Hirano Y, Nishimori T, Ishida Y. Differential Contribution of 5-HT 4, 5-HT 5, and 5-HT 6 Receptors to Acute Pruriceptive Processing Induced by Chloroquine and Histamine in Mice. Biol Pharm Bull 2023; 46:1601-1608. [PMID: 37722878 DOI: 10.1248/bpb.b23-00445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
The involvement of serotonin (5-HT) and/or noradrenaline in acute pruriceptive processing in the central nervous system (CNS) has been reported using antidepressants, such as milnacipran, a serotonin and noradrenaline reuptake inhibitor, and mirtazapine, a noradrenergic and specific serotonergic antidepressant; however, the roles of 5-HT receptor family in acute pruriceptive processing have not been fully elucidated in the CNS. In the present study, scratching behavior induced by chloroquine (CQ) was ameliorated by milnacipran or mirtazapine, and these effects were reversed by SB207266, a 5-HT4 antagonist, or SB258585, a 5-HT6 antagonist, but not by SB258585, a 5-HT5 antagonist. Moreover, CQ-induced scratches were mitigated by intrathecal injection of 5-HT4 agonists, such as BIMU8 and ML10302, and the 5-HT6 agonist, WAY208466. Conversely, histamine-induced scratches were not affected by the 5-HT4 agonists or a 5-HT6 agonist. Similarly, the amelioration of histamine-induced scratches by these antidepressants was not reversed by the 5-HT4, 5-HT5, or 5-HT6 receptor antagonist. Therefore, 5-HT is involved in the amelioration of CQ-induced scratches by milnacipran and mirtazapine, and 5-HT4, 5-HT5, and 5-HT6 receptors play differential roles in acute pruriceptive processing after administration of CQ or histamine.
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Affiliation(s)
- Yu Miyahara
- Department of Psychiatry, Faculty of Medicine, University of Miyazaki
| | - Hideki Funahashi
- Department of Psychiatry, Faculty of Medicine, University of Miyazaki
| | | | - Yoichiro Kogoh
- Department of Psychiatry, Faculty of Medicine, University of Miyazaki
| | | | - Yoji Hirano
- Department of Psychiatry, Faculty of Medicine, University of Miyazaki
| | | | - Yasushi Ishida
- Department of Psychiatry, Faculty of Medicine, University of Miyazaki
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3
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Zhou M, Zhang Q, Huo M, Song H, Chang H, Cao J, Fang Y, Zhang D. The mechanistic basis for the effects of electroacupuncture on neuropathic pain within the central nervous system. Biomed Pharmacother 2023; 161:114516. [PMID: 36921535 DOI: 10.1016/j.biopha.2023.114516] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 03/07/2023] [Accepted: 03/09/2023] [Indexed: 03/18/2023] Open
Abstract
Nociceptive signaling responses to painful stimuli are transmitted to the central nervous system (CNS) from the afferent nerves of the periphery through a series of neurotransmitters and associated signaling mechanisms. Electroacupuncture (EA) is a pain management strategy that is widely used, with clinical evidence suggesting that a frequency of 2-10 Hz is better able to suppress neuropathic pain in comparison to higher frequencies such as 100 Hz. While EA is widely recognized as a viable approach to alleviating neuralgia, the mechanistic basis underlying such analgesic activity remains poorly understood. The present review offers an overview of current research pertaining to the mechanisms whereby EA can alleviate neuropathic pain in the CNS, with a particular focus on the serotonin/norepinephrine, endogenous opioid, endogenous cannabinoid, amino acid neurotransmitter, and purinergic pathways. Moreover, the corresponding neurotransmitters, neuromodulatory compounds, neuropeptides, and associated receptors that shape these responses are discussed. Together, this review seeks to provide a robust foundation for further studies of the EA-mediated alleviation of neuropathic pain.
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Affiliation(s)
- Mengmeng Zhou
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China
| | - Qingxiang Zhang
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China
| | - Mingzhu Huo
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China
| | - Huijun Song
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China
| | - Hongen Chang
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China
| | - Jiaojiao Cao
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China
| | - Yuxin Fang
- Research Center of Experimental Acupuncture Science, College of Acumox and Tuina, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China.
| | - Di Zhang
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China; Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, PR China.
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4
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Hao S, Shi W, Liu W, Chen QY, Zhuo M. Multiple modulatory roles of serotonin in chronic pain and injury-related anxiety. Front Synaptic Neurosci 2023; 15:1122381. [PMID: 37143481 PMCID: PMC10151796 DOI: 10.3389/fnsyn.2023.1122381] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 04/03/2023] [Indexed: 05/06/2023] Open
Abstract
Chronic pain is long-lasting pain that often persists during chronic diseases or after recovery from disease or injury. It often causes serious side effects, such as insomnia, anxiety, or depression which negatively impacts the patient's overall quality of life. Serotonin (5-HT) in the central nervous system (CNS) has been recognized as an important neurotransmitter and neuromodulator which regulates various physiological functions, such as pain sensation, cognition, and emotions-especially anxiety and depression. Its widespread and diverse receptors underlie the functional complexity of 5-HT in the CNS. Recent studies found that both chronic pain and anxiety are associated with synaptic plasticity in the anterior cingulate cortex (ACC), the insular cortex (IC), and the spinal cord. 5-HT exerts multiple modulations of synaptic transmission and plasticity in the ACC and the spinal cord, including activation, inhibition, and biphasic actions. In this review, we will discuss the multiple actions of the 5-HT system in both chronic pain and injury-related anxiety, and the synaptic mechanisms behind them. It is likely that the specific 5-HT receptors would be new promising therapeutic targets for the effective treatment of chronic pain and injury-related anxiety in the future.
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Affiliation(s)
- Shun Hao
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, Shandong, China
- Oujiang Laboratory, Zhejiang Lab for Regenerative Medicine, Vision and Brain Health, Wenzhou, Zhejiang, China
- International Institute of Brain Research, Forevercheer Medicine Pharmac Inc., Qingdao, Shandong, China
| | - Wantong Shi
- Center for Neuron and Disease, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Weiqi Liu
- Center for Neuron and Disease, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Qi-Yu Chen
- International Institute of Brain Research, Forevercheer Medicine Pharmac Inc., Qingdao, Shandong, China
- The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, China
| | - Min Zhuo
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, Shandong, China
- Oujiang Laboratory, Zhejiang Lab for Regenerative Medicine, Vision and Brain Health, Wenzhou, Zhejiang, China
- International Institute of Brain Research, Forevercheer Medicine Pharmac Inc., Qingdao, Shandong, China
- Center for Neuron and Disease, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- *Correspondence: Min Zhuo,
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Crawford LC, Kim S, Karelia D, Sepulveda DE, Morgan DJ, Lü J, Henderson-Redmond AN. Decursinol-mediated antinociception and anti-allodynia in acute and neuropathic pain models in male mice: Tolerance and receptor profiling. Front Pharmacol 2022; 13:968976. [PMID: 36249788 PMCID: PMC9558739 DOI: 10.3389/fphar.2022.968976] [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] [Received: 06/14/2022] [Accepted: 09/09/2022] [Indexed: 11/26/2022] Open
Abstract
Korean scientists have shown that oral administration of Angelica gigas Nakai (AGN) root alcoholic extract and the metabolite of its pyranocoumarins, decursinol, have antinociceptive properties across various thermal and acute inflammatory pain models. The objectives of this study were 1) to assess whether tolerance develops to the antinociceptive effects of once-daily intraperitoneally administered decursinol (50 mg/kg) in acute thermal pain models, 2) to establish its anti-allodynic efficacy and potential tolerance development in a model of chemotherapy-evoked neuropathic pain (CENP) and 3) to probe the involvement of select receptors in mediating the pain-relieving effects with antagonists. The results show that decursinol induced antinociception in both the hot plate and tail-flick assays and reversed mechanical allodynia in mice with cisplatin-evoked neuropathic pain. Tolerance was detected to the antinociceptive effects of decursinol in the hot plate and tail-flick assays and to the anti-allodynic effects of decursinol in neuropathic mice. Pretreatment with either the 5-HT2 antagonist methysergide, the 5-HT2A antagonist volinanserin, or the 5-HT2C antagonist SB-242084 failed to attenuate decursinol-induced antinociception in the tail-flick assay. While pretreatment with the cannabinoid inverse agonists rimonabant and SR144528 failed to modify decursinol-induced anti-allodynia, pretreatment with the opioid antagonist naloxone partially attenuated the anti-allodynic effects of decursinol. In conclusion, our data support decursinol as an active phytochemical of AGN having both antinociceptive and anti-allodynic properties. Future work warrants a more critical investigation of potential receptor mechanisms as they are likely more complicated than initially reported.
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Affiliation(s)
- LaTaijah C. Crawford
- Biomedical Sciences Graduate Program, Pennsylvania State University College of Medicine, Hershey, PA, United States
- Department of Biomedical Sciences, Marshall University, Huntington, WV, United States
| | - Sangyub Kim
- Department of Pharmacology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Deepkamal Karelia
- Department of Pharmacology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Diana E. Sepulveda
- Department of Pharmacology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Daniel J. Morgan
- Department of Biomedical Sciences, Marshall University, Huntington, WV, United States
| | - Junxuan Lü
- Biomedical Sciences Graduate Program, Pennsylvania State University College of Medicine, Hershey, PA, United States
- Department of Pharmacology, Pennsylvania State University College of Medicine, Hershey, PA, United States
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6
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Antinociceptive effect of N-(3-(phenylselanyl)prop-2-yn-1-yl)benzamide in mice: Involvement of 5-HT1A and 5-HT2A/2C receptors. Chem Biol Interact 2022; 359:109918. [DOI: 10.1016/j.cbi.2022.109918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 03/16/2022] [Accepted: 03/23/2022] [Indexed: 11/23/2022]
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7
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Schneider T, Zurbriggen L, Dieterle M, Mauermann E, Frei P, Mercer-Chalmers-Bender K, Ruppen W. Pain response to cannabidiol in induced acute nociceptive pain, allodynia, and hyperalgesia by using a model mimicking acute pain in healthy adults in a randomized trial (CANAB I). Pain 2022; 163:e62-e71. [PMID: 34086631 DOI: 10.1097/j.pain.0000000000002310] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/05/2021] [Indexed: 11/27/2022]
Abstract
ABSTRACT Preclinical studies have demonstrated the analgesic potential of cannabidiol (CBD). Those suggesting an effect on pain-processing receptors have brought CBD back into focus. This study assessed the effect of CBD on acute pain, hyperalgesia, and allodynia compared with placebo. Twenty healthy volunteers were included in this randomized, placebo-controlled, double-blinded, crossover study assessing pain intensities (using numeric rating scale), secondary hyperalgesia (von Frey filament), and allodynia (dry cotton swab) in a well-established acute pain model with intradermal electrical stimulation. The authors compared the effect of 800-mg orally administered CBD on pain compared with placebo. They further examined the effect on hyperalgesia and allodynia. Cannabidiol whole blood levels were also measured. Pain ratings (mean ± SD) did not differ significantly after CBD application compared with placebo (5.2 ± 0.7 vs 5.3 ± 0.7, P-value 0.928), neither did the areas of hyperalgesia and allodynia differ significantly after CBD application compared with placebo (hyperalgesia 23.9 ± 19.2 cm2 vs 27.4 ± 17.0 cm2, P-value 0.597; allodynia 16.6 ± 13.1 cm2 vs 17.3 ± 14.1 cm2, P-value 0.884). The CBD whole blood level (median, first to third quartile) was 2.0 µg/L (1.5-5.1) 60 minutes and 5.0 µg/L (4.0-10.4) 130 minutes after CBD application. Although the oral application of 800-mg CBD failed to show a significant effect, it is important to focus future research on different dosing, routes of administration, and CBD as a part of multimodal treatment strategies before negating its effects on acute pain.
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Affiliation(s)
- Tobias Schneider
- Department for Anesthesia, Intensive Care Medicine, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, Basel, Switzerland
| | - Laura Zurbriggen
- Department for Anesthesia, Intensive Care Medicine, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, Basel, Switzerland
| | - Markus Dieterle
- Department for Anesthesia, Intensive Care Medicine, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, Basel, Switzerland
| | - Eckhard Mauermann
- Department for Anesthesia, Intensive Care Medicine, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, Basel, Switzerland
| | - Priska Frei
- Department of Biomedical Engineering, Institute of Forensic Medicine, University of Basel, Basel, Switzerland
| | | | - Wilhelm Ruppen
- Department for Anesthesia, Intensive Care Medicine, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, Basel, Switzerland
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Ghasemzadeh Z, Seddighfar M, Alijanpour S, Rezayof A. Ventral tegmental area serotonin 5-HT 1A receptors and corticolimbic cFos/BDNF/GFAP signaling pathways mediate dextromethorphan/morphine anti-allodynia. Physiol Behav 2021; 239:113522. [PMID: 34242672 DOI: 10.1016/j.physbeh.2021.113522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/10/2021] [Accepted: 06/30/2021] [Indexed: 12/30/2022]
Abstract
AIMS The present study examined the role of ventral tegmental area (VTA) serotonergic 5HT1A receptors in dextromethorphan/morphine-induced anti-allodynia and the possible changes of corticolimbic cFos, brain-derived neurotrophic factor (BDNF), and glial fibrillary acidic protein (GFAP) following the treatments. MATERIALS AND METHODS The VTA cannulation and the chronic constriction of the sciatic nerve were performed in male Wistar rats. Flexion withdrawal thresholds to mechanical stimulation in the hind-limb were determined using von Frey hairs. The expressions of cFos, BDNF, and GFAP were evaluated using the Western blotting technique. KEY FINDINGS BDNF (in the hippocampus), and GFAP (in the targeted sites) levels were increased following neuropathic pain. Morphine administration induced an anti-allodynic effect with a decrease in the amygdala BDNF level. Dextromethorphan/morphine-induced anti-allodynia was accompanied by the decrease of hippocampus/amygdala/PFC GFAP and amygdala cFos expressions. The PFC BDNF expression level was increased in dextromethorphan/morphine-treated rats. Intra-VTA microinjection of (S)-WAY100135 (1 µg/rat), a selective 5-HT1A receptor antagonist, inhibited the anti-allodynic effect of dextromethorphan/morphine. This treatment increased the cFos level in the hippocampus and the amygdala while decreased the PFC level of cFos. The hippocampal BDNF expression was significantly increased, while the amygdala and the PFC expressions of BDNF were decreased under treatment. (S)-WAY100135 plus dextromethorphan/morphine increased the hippocampal/amygdala and PFC levels of GFAP. SIGNIFICANCE These findings indicate that dextromethorphan could potentiate the analgesic effect of morphine via the implication of the VTA serotonin 5-HT1A receptors. It seems that the changes in the corticolimbic cFos/BDNF/GFAP signaling pathway may be involved in the observed anti-allodynic effect.
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Affiliation(s)
- Zahra Ghasemzadeh
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Masoud Seddighfar
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Sakineh Alijanpour
- Department of Biology, Faculty of Science, Gonbad Kavous University, Gonbad Kavous, Iran
| | - Ameneh Rezayof
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
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Yu CHJ, Rupasinghe HPV. Cannabidiol-based natural health products for companion animals: Recent advances in the management of anxiety, pain, and inflammation. Res Vet Sci 2021; 140:38-46. [PMID: 34391060 DOI: 10.1016/j.rvsc.2021.08.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 07/18/2021] [Accepted: 08/05/2021] [Indexed: 12/21/2022]
Abstract
Recent advances in cannabidiol (CBD) use in canines and felines for anxiety management, pain management, and anti-inflammatory effects were reviewed using a literature search conducted with the following keywords: CBD, anxiety, inflammation, pain, dogs, cats, and companion animals. For decades, research on CBD has been hindered due to the status of cannabis (C. sativa L.) as an illicit drug. Limited safety data show that CBD is well-tolerated in dogs, with insufficient information on the safety profile of CBD in cats. Upon oral supplementation of CBD, elevation in liver enzymes was observed for both dogs and cats, and pharmacokinetics of CBD are different in the two species. There is a significant gap in the literature on the therapeutic use of CBD in cats, with no feline data on anxiety, pain, and inflammation management. There is evidence that chronic osteoarthritic pain in dogs can be reduced by supplementation with CBD. Furthermore, experiments are required to better understand whether CBD has an influence on noise-induced fear and anxiolytic response. Preliminary evidence exists to support the analgesic properties of CBD in treating chronic canine osteoarthritis; however, there are inter- and intra-species differences in pharmacokinetics, tolerance, dosage, and safety of CBD. Therefore, to validate the anxiety management, pain management, and anti-inflammatory efficacy of CBD, it is essential to conduct systematic, randomized, and controlled trials. Further, the safety and efficacious dose of CBD in companion animals warrants investigation.
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Affiliation(s)
- Cindy H J Yu
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada
| | - H P Vasantha Rupasinghe
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada; Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.
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10
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Yu L, Li S, Wei J, Sun H, Yang C, Tan H. Association of serotonin transporter-linked polymorphic region (5-HTTLPR) with heat pain stimulation and postoperative pain in gastric cancer patients. Mol Pain 2021; 17:17448069211006606. [PMID: 33882731 PMCID: PMC8071976 DOI: 10.1177/17448069211006606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background The aim of this study was to assess whether the genotype of the serotonin transporter-linked polymorphic region (5-HTTLPR) in gastric cancer patients is associated with postoperative pain and pain threshold. Methods We conducted a prospective cohort study of 251 patients scheduled for gastrectomy from May to September 2019. All patients enrolled in the study were asked to complete the Hospital Anxiety and Depression Scale questionnaire. Heat pain threshold (HPT), cold pain threshold (CPT) and Pressure pain threshold (PPT) were measured for all participants one day prior to surgery. Blood samples were collected for genetic testing. All patients were connected to a patient-controlled intravenous analgesia (PCIA) pump at the end of the surgery. After exclusion of 15 patients, the postoperative conditions of 236 patients were recorded. Results Distribution of homozygous long (L/L), heterozygous (L/S), and homozygous short (S/S) 5-HTTLPR genotypes among participants were 26 (11.0%), 91 (38.6%), and 119 (50.4%), respectively. Heat pain threshold (P = 0.038) and Numerical rating scale (NRS) in the 1st postoperative 24 h (P = 0.026) were significantly different between long (L/L) and short (S/S) genotype carriers. Conclusions In patients with gastric cancer, heat pain stimulation is associated with 5-HTTLPR polymorphism, and postoperative pain may be related to 5-HTTLPR polymorphism.
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Affiliation(s)
- Ling Yu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education, Beijing), Department of Anesthesiology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Shuo Li
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education, Beijing), Department of Anesthesiology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Jin Wei
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education, Beijing), Department of Anesthesiology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Hongwei Sun
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education, Beijing), Department of Anesthesiology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Caixia Yang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education, Beijing), Department of Anesthesiology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Hongyu Tan
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education, Beijing), Department of Anesthesiology, Peking University Cancer Hospital & Institute, Beijing, China
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11
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Tran H, Sagi V, Jarrett S, Palzer EF, Badgaiyan RD, Gupta K. Diet and companionship modulate pain via a serotonergic mechanism. Sci Rep 2021; 11:2330. [PMID: 33526805 PMCID: PMC7851147 DOI: 10.1038/s41598-021-81654-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 01/08/2021] [Indexed: 01/30/2023] Open
Abstract
Treatment of severe chronic and acute pain in sickle cell disease (SCD) remains challenging due to the interdependence of pain and psychosocial modulation. We examined whether modulation of the descending pain pathway through an enriched diet and companionship could alleviate pain in transgenic sickle mice. Mechanical and thermal hyperalgesia were reduced significantly with enriched diet and/or companionship. Upon withdrawal of both conditions, analgesic effects observed prior to withdrawal were diminished. Serotonin (5-hydroxytryptamine, 5-HT) was found to be increased in the spinal cords of mice provided both treatments. Additionally, 5-HT production improved at the rostral ventromedial medulla and 5-HT accumulated at the dorsal horn of the spinal cord of sickle mice, suggesting the involvement of the descending pain pathway in the analgesic response. Modulation of 5-HT and its effect on hyperalgesia was also investigated through pharmaceutical approaches. Duloxetine, a serotonin-norepinephrine reuptake inhibitor, showed a similar anti-nociceptive effect as the combination of diet and companionship. Depletion of 5-HT through p-chlorophenylalanine attenuated the anti-hyperalgesic effect of enriched diet and companionship. More significantly, improved diet and companionship enhanced the efficacy of a sub-optimal dose of morphine for analgesia in sickle mice. These findings offer the potential to reduce opioid use without pharmacological interventions to develop effective pain management strategies.
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Affiliation(s)
- Huy Tran
- grid.17635.360000000419368657 Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Minneapolis, MN USA
| | - Varun Sagi
- grid.17635.360000000419368657 Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Minneapolis, MN USA
| | - Sarita Jarrett
- grid.16753.360000 0001 2299 3507Northwestern University, Evanston, IL USA
| | - Elise F. Palzer
- grid.17635.360000000419368657Biostatistical Design and Analysis Center, Clinical and Translational Sciences Institute, University of Minnesota, Minneapolis, MN USA
| | - Rajendra D. Badgaiyan
- grid.267309.90000 0001 0629 5880Department of Psychiatry, Long School of Medicine, University of Texas Health Science Center, San Antonio, Texas USA
| | - Kalpna Gupta
- grid.17635.360000000419368657 Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Minneapolis, MN USA ,Hematology/Oncology, Department of Medicine, University of California, Irvine and Southern California Institute for Research and Education, VA Medical Center, 5901 East 7th St, Long Beach, CA 90822 USA
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12
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Lee JH, Min D, Lee D, Kim W. Zingiber officinale Roscoe Rhizomes Attenuate Oxaliplatin-Induced Neuropathic Pain in Mice. Molecules 2021; 26:548. [PMID: 33494465 PMCID: PMC7866215 DOI: 10.3390/molecules26030548] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/16/2021] [Accepted: 01/20/2021] [Indexed: 12/19/2022] Open
Abstract
Oxaliplatin is a platinum derivative chemotherapeutic drug widely used against cancers, but even a single treatment can induce a severe allodynia that requires treatment interruption and dose diminution. The rhizome of Zingiber officinale roscoe (Z. officinale, ginger), has been widely used in traditional medicine to treat various diseases causing pain; however, its effect against oxaliplatin-induced neuropathic pain has never been assessed. In mice, a single oxaliplatin (6 mg/kg, i.p.) treatment induced significant cold and mechanical allodynia. Cold and mechanical allodynia were assessed by acetone drop and von Frey filament tests, respectively. Water extracts of Z. officinale (100, 300, and 500 mg/kg, p.o.) significantly attenuated both cold and mechanical allodynia induced by oxaliplatin. Intrathecal pre-treatment with the antagonist 5-HT1A (NAN-190, i.t., 1 μg), but not with the antagonist 5-HT2A (ketanserin, i.t., 1 μg), significantly blocked the analgesic effect of Z. officinale against both cold and mechanical allodynia. However, 5-HT3 antagonist (MDL-72222, i.t., 15 μg) administration only blocked the anti-allodynic effect of Z. officinale against cold allodynia. Real-time PCR analysis demonstrated that Z. officinale significantly increased the mRNA expression of the spinal 5-HT1A receptor that was downregulated after oxaliplatin injection. These results suggest that Z. officinale may be a viable treatment option for oxaliplatin-induced neuropathic pain.
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Affiliation(s)
- Ji Hwan Lee
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02453, Korea; (J.H.L.); (D.M.)
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02453, Korea
| | - Daeun Min
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02453, Korea; (J.H.L.); (D.M.)
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02453, Korea
| | - Donghun Lee
- Department of Herbal Pharmacology, College of Korean Medicine, Gachon University, Gyeonggi-do 13120, Korea;
| | - Woojin Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul 02453, Korea; (J.H.L.); (D.M.)
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02453, Korea
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13
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Serotonergically dependent antihyperalgesic and antiallodynic effects of isoliquiritin in a mouse model of neuropathic pain. Eur J Pharmacol 2020; 881:173184. [PMID: 32417324 DOI: 10.1016/j.ejphar.2020.173184] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 04/17/2020] [Accepted: 05/08/2020] [Indexed: 12/23/2022]
Abstract
Chronic neuropathic pain poses a significant health problem worldwide, for which effective treatment is lacking. The current work aimed to investigate the potential analgesic effect of isoliquiritin, a flavonoid from Glycyrrhiza uralensis, against neuropathic pain and elucidate mechanisms. Male C57BL/6J mice were subjected to chronic constriction injury (CCI) by loose ligation of their sciatic nerves. Following CCI surgery, the neuropathic mice developed pain-like behaviors, as shown by thermal (heat) hyperalgesia in the Hargreaves test and tactile allodynia in the von Frey test. Repetitive treatment of CCI mice with isoliquiritin (p.o., twice per day for two weeks) ameliorated behavioral hyperalgesia to thermal (heat) stimuli and allodynia to tactile stimuli in a dose-dependent fashion (5, 15 and 45 mg/kg). The isoliquiritin-triggered analgesia seems serotonergically dependent, since its antihyperalgesic and antiallodynic actions were totally abolished by chemical depletion of spinal serotonin by p-chlorophenylalanine, whereas potentiated by 5-HTP (a precursor of 5-HT). Consistently, isoliquiritin-treated neuropathic mice showed escalated levels of spinal monoamines especially 5-HT, with depressed monoamine oxidase activity. Moreover, isoliquiritin-evoked antihyperalgesia and antiallodynia were preferentially counteracted by the 5-HT1A receptor antagonist WAY-100635 delivered systematically or spinally. Of notable benefit, isoliquiritin was able to correct co-morbid behavioral symptoms of depression and anxiety evoked by neuropathic pain. Collectively, these findings demonstrate, for the first time, the therapeutic efficacy of isoliquiritin on neuropathic hypersensitivity, and this effect is dependent on the spinal serotonergic system and 5-HT1A receptors.
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Pingue V, Gentili M, Losurdo A, Clementi E, Nardone A. Levetiracetam Improves Upper Limb Spasticity in a Patient With Unresponsive Wakefulness Syndrome: A Case Report. Front Neurosci 2020; 14:70. [PMID: 32116516 PMCID: PMC7015971 DOI: 10.3389/fnins.2020.00070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 01/17/2020] [Indexed: 11/24/2022] Open
Abstract
Severe spasticity is a frequent and disabling complication in patients presenting disorders of consciousness (DOC) that hinders their rehabilitative process, and is strongly correlated with pain reducing patients’ quality of life. In these patients, abnormal postures may occur as an expression of severe brain damage. Here we present the case of a 52-year-old man in decorticate rigidity following a hypoxic–ischemic encephalopathy due to myocardial infarction who showed improvement of spasticity of upper limbs following intake of levetiracetam combined with the conventional neurorehabilitation program.
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Affiliation(s)
- Valeria Pingue
- Neurorehabilitation and Spinal Unit, Institute of Pavia, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
- *Correspondence: Valeria Pingue,
| | - Marta Gentili
- Pharmacy Service, Institute of Pavia, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Anna Losurdo
- Pharmacy Service, Institute of Pavia, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Emilio Clementi
- Unit of Clinical Pharmacology, Department of Biomedical and Clinical Sciences L. Sacco, University Hospital “Luigi Sacco”, Università di Milano, Milan, Italy
- Scientific Institute IRCCS Eugenio Medea, Lecco, Italy
| | - Antonio Nardone
- Neurorehabilitation and Spinal Unit, Institute of Pavia, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
- Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
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15
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Valproate reverses stress-induced somatic hyperalgesia and visceral hypersensitivity by up-regulating spinal 5-HT 2C receptor expression in female rats. Neuropharmacology 2019; 165:107926. [PMID: 31883927 DOI: 10.1016/j.neuropharm.2019.107926] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 11/15/2019] [Accepted: 12/20/2019] [Indexed: 12/15/2022]
Abstract
Sodium valproate (VPA) has analgesic effects in clinical and experimental studies, but the mechanisms are still unclear. The present study examined the effects of VPA on stress-induced somatic hyperalgesia and visceral hypersensitivity and the role of 5-HT2C receptors in the spinal cord. Repeated 3 day forced swim (FS) significantly reduced the thermal withdrawal latency and mechanical withdrawal threshold, and increased the magnitude of the visceromotor response to colorectal distention compared to the baseline values in rats. The somatic hyperalgesia and visceral hypersensitivity were accompanied by significant down-regulation of 5-HT2C receptor expression in the L4-L5 and L6-S1 dorsal spinal cord. Intraperitoneal administration of VPA (300 mg/kg) before each FS and 1 day post FS prevented the development of somatic hyperalgesia and visceral hypersensitivity induced by FS stress, as well as down-regulation of 5-HT2C receptors in the spinal cord. The reversal of somatic hyperalgesia and visceral hypersensitivity by VPA in FS rats was blocked by intrathecal administration of the selective 5-HT2C receptor antagonist RS-102221 (30 μg/10 μL) 30 min after each VPA injection. The results suggest that VPA attenuates FS-induced somatic hyperalgesia and visceral hypersensitivity by restoring down-regulated function of 5-HT2C receptors in the spinal cord.
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16
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Paredes S, Cantillo S, Candido KD, Knezevic NN. An Association of Serotonin with Pain Disorders and Its Modulation by Estrogens. Int J Mol Sci 2019; 20:E5729. [PMID: 31731606 PMCID: PMC6888666 DOI: 10.3390/ijms20225729] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 11/12/2019] [Accepted: 11/14/2019] [Indexed: 12/12/2022] Open
Abstract
Ovarian hormones play an important role in pain perception, and are responsible, at least in part, for the pain threshold differences between the sexes. Modulation of pain and its perception are mediated by neurochemical changes in several pathways, affecting both the central and peripheral nervous systems. One of the most studied neurotransmitters related to pain disorders is serotonin. Estrogen can modify serotonin synthesis and metabolism, promoting a general increase in its tonic effects. Studies evaluating the relationship between serotonin and disorders such as irritable bowel syndrome, fibromyalgia, migraine, and other types of headache suggest a clear impact of this neurotransmitter, thereby increasing the interest in serotonin as a possible future therapeutic target. This literature review describes the importance of substances such as serotonin and ovarian hormones in pain perception and illustrates the relationship between those two, and their direct influence on the presentation of the aforementioned pain-related conditions. Additionally, we review the pathways and receptors implicated in each disorder. Finally, the objective was to stimulate future pharmacological research to experimentally evaluate the potential of serotonin modulators and ovarian hormones as therapeutic agents to regulate pain in specific subpopulations.
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Affiliation(s)
- Stephania Paredes
- Department of Anesthesiology, Advocate Illinois Masonic Medical Center, 836 W. Wellington Ave. Suite 4815, Chicago, IL 60657, USA; (S.P.); (S.C.); (K.D.C.)
| | - Santiago Cantillo
- Department of Anesthesiology, Advocate Illinois Masonic Medical Center, 836 W. Wellington Ave. Suite 4815, Chicago, IL 60657, USA; (S.P.); (S.C.); (K.D.C.)
| | - Kenneth D. Candido
- Department of Anesthesiology, Advocate Illinois Masonic Medical Center, 836 W. Wellington Ave. Suite 4815, Chicago, IL 60657, USA; (S.P.); (S.C.); (K.D.C.)
- Department of Anesthesiology, University of Illinois, Chicago, IL 60612, USA
- Department of Surgery, University of Illinois, Chicago, IL 60612, USA
| | - Nebojsa Nick Knezevic
- Department of Anesthesiology, Advocate Illinois Masonic Medical Center, 836 W. Wellington Ave. Suite 4815, Chicago, IL 60657, USA; (S.P.); (S.C.); (K.D.C.)
- Department of Anesthesiology, University of Illinois, Chicago, IL 60612, USA
- Department of Surgery, University of Illinois, Chicago, IL 60612, USA
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17
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Nakamori H, Naitou K, Horii Y, Shimaoka H, Horii K, Sakai H, Yamada A, Furue H, Shiina T, Shimizu Y. Roles of the noradrenergic nucleus locus coeruleus and dopaminergic nucleus A11 region as supraspinal defecation centers in rats. Am J Physiol Gastrointest Liver Physiol 2019; 317:G545-G555. [PMID: 31460791 DOI: 10.1152/ajpgi.00062.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We previously demonstrated that administration of norepinephrine, dopamine, and serotonin into the lumbosacral defecation center caused propulsive contractions of the colorectum. It is known that the monoamines in the spinal cord are released mainly from descending neurons in the brainstem. In fact, stimulation of the medullary raphe nuclei, the origin of descending serotonergic neurons, enhances colorectal motility via the lumbosacral defecation center. Therefore, the purpose of this study was to examine the roles of the noradrenergic nucleus locus coeruleus (LC) and dopaminergic nucleus A11 region in the defecation reflex. Colorectal motility was measured with a balloon in anesthetized rats. Electrical stimulation of the LC and A11 region increased colorectal pressure only when a GABAA receptor antagonist was injected into the lumbosacral spinal cord. The effects of the LC stimulation and A11 region stimulation on colorectal motility were inhibited by antagonists of α1-adrenoceptors and D2-like dopamine receptors injected into the lumbosacral spinal cord, respectively. Spinal injection of a norepinephrine-dopamine reuptake inhibitor augmented the colokinetic effect of LC stimulation. The effect of stimulation of each nucleus was abolished by surgical severing of the parasympathetic pelvic nerves. Our findings demonstrate that activation of descending noradrenergic neurons from the LC and descending dopaminergic neurons from the A11 region causes enhancement of colorectal motility via the lumbosacral defecation center. The present study provides a novel concept that the brainstem monoaminergic nuclei play a role as supraspinal defecation centers.NEW & NOTEWORTHY The present study demonstrates that electrical and chemical stimulations of the locus coeruleus or A11 region augment contractions of the colorectum. The effects of locus coeruleus and A11 stimulations on colorectal motility are due to activation of α1-adrenoceptors and D2-like dopamine receptors in the lumbosacral defecation center, respectively. The present study provides a novel concept that the brainstem monoaminergic nuclei play a role as supraspinal defecation centers.
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Affiliation(s)
- Hiroyuki Nakamori
- Department of Basic Veterinary Science, Laboratory of Physiology, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Kiyotada Naitou
- Department of Basic Veterinary Science, Laboratory of Physiology, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Yuuki Horii
- Department of Basic Veterinary Science, Laboratory of Physiology, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Hiroki Shimaoka
- Department of Basic Veterinary Science, Laboratory of Physiology, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Kazuhiro Horii
- Department of Basic Veterinary Science, Laboratory of Physiology, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Hiroki Sakai
- Department of Pathogenetic Veterinary Science, Laboratory of Pathology, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Gifu, Japan
| | - Akihiro Yamada
- Department of Neurophysiology, Hyogo College of Medicine, Nishinomiya, Japan
| | - Hidemasa Furue
- Department of Neurophysiology, Hyogo College of Medicine, Nishinomiya, Japan
| | - Takahiko Shiina
- Department of Basic Veterinary Science, Laboratory of Physiology, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Yasutake Shimizu
- Department of Basic Veterinary Science, Laboratory of Physiology, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Gifu, Japan
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Cannabidiol modulates serotonergic transmission and reverses both allodynia and anxiety-like behavior in a model of neuropathic pain. Pain 2019; 160:136-150. [PMID: 30157131 PMCID: PMC6319597 DOI: 10.1097/j.pain.0000000000001386] [Citation(s) in RCA: 221] [Impact Index Per Article: 44.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Low dose of cannabidiol ameliorates mechanical allodynia and anxious behavior and restores impaired serotonergic transmission in a neuropathic pain model in rats. Clinical studies indicate that cannabidiol (CBD), the primary nonaddictive component of cannabis that interacts with the serotonin (5-HT)1A receptor, may possess analgesic and anxiolytic effects. However, its effects on 5-HT neuronal activity, as well as its impact on models of neuropathic pain are unknown. First, using in vivo single-unit extracellular recordings in rats, we demonstrated that acute intravenous (i.v.) increasing doses of CBD (0.1-1.0 mg/kg) decreased the firing rate of 5-HT neurons in the dorsal raphe nucleus, which was prevented by administration of the 5-HT1A antagonist WAY 100635 (0.3 mg/kg, i.v.) and the TRPV1 antagonist capsazepine (1 mg/kg, i.v.) but not by the CB1 receptor antagonist AM 251 (1 mg/kg, i.v.). Repeated treatment with CBD (5 mg/kg/day, subcutaneously [s.c.], for 7 days) increased 5-HT firing through desensitization of 5-HT1A receptors. Rats subjected to the spared nerve injury model for 24 days showed decreased 5-HT firing activity, mechanical allodynia, and increased anxiety-like behavior in the elevated plus maze test, open-field test, and novelty-suppressed feeding test. Seven days of treatment with CBD reduced mechanical allodynia, decreased anxiety-like behavior, and normalized 5-HT activity. Antiallodynic effects of CBD were fully prevented by capsazepine (10 mg/kg/day, s.c., for 7 days) and partially prevented by WAY 100635 (2 mg/kg/day, s.c., for 7 days), whereas the anxiolytic effect was blocked only by WAY. Overall, repeated treatment with low-dose CBD induces analgesia predominantly through TRPV1 activation, reduces anxiety through 5-HT1A receptor activation, and rescues impaired 5-HT neurotransmission under neuropathic pain conditions.
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19
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Antinociceptive effect of flavonol and a few structurally related dimethoxy flavonols in mice. Inflammopharmacology 2019; 27:1155-1167. [PMID: 30850920 DOI: 10.1007/s10787-019-00579-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 02/26/2019] [Indexed: 10/27/2022]
Abstract
Previous reports suggest flavonoids as potent analgesic compounds. Based on these observations, the present study investigated the antinociceptive action of flavonol, 3', 4'-dimethoxy flavonol, 6, 3'-dimethoxy flavonol, 7, 2'-dimethoxy flavonol, and 7, 3'-dimethoxy flavonol and the possible mechanisms involved in these effects. The antinociceptive effect of the investigated compounds in doses of 25, 50, 100, and 200 mg/kg was evaluated in male Swiss albino mice using the acetic acid test, formalin-induced nociception, and hot water tail immersion test. The role of opioid, tryptaminergic, adrenergic, dopaminergic, GABAergic, and K+ATP channels in producing the antinociceptive effect was also studied using appropriate interacting agents. Treatment with flavonol and dimethoxy flavonols resulted in a significant reduction in the number of abdominal constrictions in the acetic acid test, a significant inhibition of the paw-licking/biting response time in both the phases of formalin nociception and also a significant increase in mean reaction time in the hot water tail immersion test. These observations revealed the antinociceptive effect of dimethoxy flavonols. The role of opioid, serotonergic (5HT3), and dopaminergic system was identified in the antinociceptive effect of flavonol and all dimethoxy derivatives investigated. In addition, the role of GABAergic, K+ATP channel, and α-2 adrenergic mechanisms were also observed in the antinociceptive action of some of the investigated compounds. The present study identified the antinociceptive effect of flavonol and dimethoxy flavonols in mice acting through different neuronal pathways.
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20
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Chou AK, Chiu CC, Wang JJ, Chen YW, Hung CH. Serotonin enhances oxybuprocaine- and proxymetacaine-induced cutaneous analgesia in rats. Eur J Pharmacol 2019; 846:73-78. [PMID: 30639797 DOI: 10.1016/j.ejphar.2019.01.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 12/28/2018] [Accepted: 01/09/2019] [Indexed: 02/07/2023]
Abstract
The aim of the study was to investigate the analgesic effects of adding serotonin to oxybuprocaine or proxymetacaine preparations. We employed a rat model of the cutaneous trunci muscle reflex (CTMR) to conduct the dose-response curves and duration of drugs (oxybuprocaine, proxymetacaine, or serotonin) as an infiltrative anesthetic. The use of isobolographic methods to analyze the drug-drug interactions. We showed that oxybuprocaine and proxymetacaine, as well as serotonin produced dose-dependent skin antinociception. On the basis of 50% effective dose (ED50), the rank order of drug potency was serotonin [7.22 (6.45-8.09) μmol/kg] < oxybuprocaine [1.03 (0.93-1.15) μmol/kg] < proxymetacaine [0.59 (0.53-0.66) μmol/kg] (P < 0.01 for each comparison). The sensory block duration of serotonin was longer (P < 0.01) than that of oxybuprocaine or proxymetacaine at the equipotent doses (ED25, ED50, and ED75). The mixture of serotonin with oxybuprocaine or proxymetacaine produced a better analgesic effect than the drug itself. We have concluded that oxybuprocaine, proxymetacaine, or serotonin displays dose-related cutaneous analgesia. Oxybuprocaine or proxymetacaine is more potent and has a shorter duration of cutaneous analgesia than serotonin. Serotonin produces a synergistic antinociceptive interaction with oxybuprocaine or proxymetacaine.
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Affiliation(s)
- An-Kuo Chou
- Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan; School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan
| | - Chong-Chi Chiu
- Department of General Surgery, Chi-Mei Medical Center, Tainan and Liouying, Taiwan; Department of Electrical Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Jhi-Joung Wang
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan; AI Biomed Center, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Yu-Wen Chen
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan; Department of Physical Therapy, College of Health Care, China Medical University, Taichung, Taiwan
| | - Ching-Hsia Hung
- Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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21
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Panteleev SS, Sivachenko IB, Lyubashina OA. The central effects of buspirone on abdominal pain in rats. Neurogastroenterol Motil 2018; 30:e13431. [PMID: 30101506 DOI: 10.1111/nmo.13431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 06/08/2018] [Accepted: 06/24/2018] [Indexed: 12/28/2022]
Abstract
BACKGROUND Buspirone, a partial agonist of the 5-HT1a receptor (5-HT1a R), owing to potential antinociceptive properties may be useful in treatment of abdominal pain in IBS patients. The pain-related effects of buspirone are mediated via the 5-HT1a Rs, specifically located within the ventrolateral medulla (VLM). The most animal studies of the 5-HT1a R involvement in pain control have been carried out with somatic behavioral tests. The 5-HT1a R contribution in visceral pain transmission within the VLM is unclear. The objective of our study was to evaluate the 5-HT1a R contribution in abdominal pain transmission within the VLM. METHODS Using animal model of abdominal pain (urethane-anaesthetized rats), based on the noxious colorectal distension (CRD) as pain stimulus we studied effects of buspirone (1.0-4.0 mg kg-1 , iv) on the CRD-induced VLM neuron and blood pressure responses as markers of abdominal pain before and after the 5-HT1a R blockade by antagonist, WAY 100,635. RESULTS The CRD induced a significant increase in VLM neuron activity up to 201.5 ± 18.0% and depressor reactions up to 68 ± 1.8% of baseline. Buspirone (1.0-4.0 mg kg-1 , iv) resulted in an inhibition of the CRD-induced neuron responses which were changed inversely with dose increase and decreased depressor reactions directly with dose increase. These effects were antagonized by intracerebroventricular WAY 100,635. CONCLUSION Buspirone exerts complex biphasic action on the pain-related VLM neuron activity inversely depending on dose. The final effect of buspirone depends on the functional balance between of activation the pre- and postsynaptic 5-HT1a Rs in mediating pain control networks.
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Affiliation(s)
- S S Panteleev
- Laboratory of Cortico-Visceral Physiology, Pavlov Institute of Physiology, Russian Academy of Sciences, Saint Petersburg, Russia.,Department of Neuropharmacology, Valdman Institute of Pharmacology, First Saint-Petersburg Pavlov State Medical University, Saint Petersburg, Russia
| | - I B Sivachenko
- Laboratory of Cortico-Visceral Physiology, Pavlov Institute of Physiology, Russian Academy of Sciences, Saint Petersburg, Russia
| | - O A Lyubashina
- Laboratory of Cortico-Visceral Physiology, Pavlov Institute of Physiology, Russian Academy of Sciences, Saint Petersburg, Russia.,Department of Neuropharmacology, Valdman Institute of Pharmacology, First Saint-Petersburg Pavlov State Medical University, Saint Petersburg, Russia
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22
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Cortes-Altamirano JL, Olmos-Hernandez A, Jaime HB, Carrillo-Mora P, Bandala C, Reyes-Long S, Alfaro-Rodríguez A. Review: 5-HT1, 5-HT2, 5-HT3 and 5-HT7 Receptors and their Role in the Modulation of Pain Response in the Central Nervous System. Curr Neuropharmacol 2018; 16:210-221. [PMID: 28901281 PMCID: PMC5883380 DOI: 10.2174/1570159x15666170911121027] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 08/24/2017] [Accepted: 09/01/2017] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND The aim of this review was to identify the mechanisms by which serotonin receptors involved at the central level are able to modulate the nociceptive response. Pain is a defense mechanism of the body that entails physiological, anatomical, neurochemical, and psychological changes, and is defined as an unpleasant sensory and emotional experience with potential risk of tissue damage, comprising the leading cause of appointments with Physicians worldwide. Treatment for this symptom has generated several neuropharmacological lines of research, due to the different types of pain and the various drugs employed to treat this condition. Serotonin [5- HydroxyTryptamine (5-HT)] is a neurotransmitter with seven families (5-HT1-5-HT7) and approximately 15 receptor subtypes. Serotonin modulates neuronal activity; however, this neurotransmitter is related with a number of physiological processes, such as cardiovascular function, gastric motility, renal function, etc. On the other hand, several researches reported that serotonin modulates nociceptive response through 5-HT1, 5-HT2, 5-HT3, and 5-HT7 receptors in the Central Nervous System (CNS). METHOD In this review, a search was conducted on PubMed, ProQuest, EBSCO, and the Science Citation Index for studies evaluating the effects of 5-HT1, 5-HT2, 5-HT3, and 5-HT7 receptors in the CNS on the modulation of different types of pain. CONCLUSION We concluded that 5-HT1, 5-HT2, 5-HT3, and 5-HT7 receptors in the CNS modulate the pain, but this depends on the distribution of the receptors, dose of agonists or antagonists, administration route, pain type and duration in order to inhibit, excite, or even maintain the nociceptive response.
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Affiliation(s)
- Jose Luis Cortes-Altamirano
- PhD Program in Biological and Health Sciences, Universidad Autonoma Metropolitana Iztapalapa-Xochimilco- Cuajimalpa, Mexico, Calzada del Hueso 1100, Col. Villa Quietud, Mexico, D.F. 04960, Mexico
| | - Adriana Olmos-Hernandez
- Departament of Neurosciences, Instituto Nacional de Rehabilitacion, "Luis Guillermo Ibarra Ibarra", Secretaria de Salud, Col. Arenal de Guadalupe, Mexico, D.F. 14389, Mexico
| | - Herlinda Bonilla Jaime
- Departament of Reproductive Biology, Universidad Autonoma Metropolitana Campus Iztapalapa, Mexico, D.F. 09340, Mexico
| | - Paul Carrillo-Mora
- Departament of Neurosciences, Instituto Nacional de Rehabilitacion, "Luis Guillermo Ibarra Ibarra", Secretaria de Salud, Col. Arenal de Guadalupe, Mexico, D.F. 14389, Mexico
| | - Cindy Bandala
- Departament of Neurosciences, Instituto Nacional de Rehabilitacion, "Luis Guillermo Ibarra Ibarra", Secretaria de Salud, Col. Arenal de Guadalupe, Mexico, D.F. 14389, Mexico
| | - Samuel Reyes-Long
- Departament of Neurosciences, Instituto Nacional de Rehabilitacion, "Luis Guillermo Ibarra Ibarra", Secretaria de Salud, Col. Arenal de Guadalupe, Mexico, D.F. 14389, Mexico
| | - Alfonso Alfaro-Rodríguez
- Departament of Neurosciences, Instituto Nacional de Rehabilitacion, "Luis Guillermo Ibarra Ibarra", Secretaria de Salud, Col. Arenal de Guadalupe, Mexico, D.F. 14389, Mexico
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Sánchez-Brualla I, Boulenguez P, Brocard C, Liabeuf S, Viallat-Lieutaud A, Navarro X, Udina E, Brocard F. Activation of 5-HT 2A Receptors Restores KCC2 Function and Reduces Neuropathic Pain after Spinal Cord Injury. Neuroscience 2018; 387:48-57. [PMID: 28844001 DOI: 10.1016/j.neuroscience.2017.08.033] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 07/26/2017] [Accepted: 08/14/2017] [Indexed: 11/30/2022]
Abstract
Downregulation of the potassium chloride cotransporter type 2 (KCC2) after a spinal cord injury (SCI) disinhibits motoneurons and dorsal horn interneurons causing spasticity and neuropathic pain, respectively. We showed recently (Bos et al., 2013) that specific activation of 5-HT2A receptors by TCB-2 [(4-bromo-3,6-dimethoxybenzocyclobuten-1-yl)methylamine hydrobromide] upregulates KCC2 function, restores motoneuronal inhibition and reduces SCI-induced spasticity. Here, we tested the potential analgesic effect of TCB-2 on central (thoracic hemisection) and peripheral [spared nerve injury (SNI)] neuropathic pain. We found mechanical and thermal hyperalgesia reduced by an acute administration of TCB-2 in rats with SCI. This analgesic effect was associated with an increase in dorsal horn membrane KCC2 expression and was prevented by pharmacological blockade of KCC2 with an intrathecal injection of DIOA [(dihydroindenyl)oxy]alkanoic acid]. In contrast, the SNI-induced neuropathic pain was not attenuated by TCB-2 although there was a slight increase of membrane KCC2 expression in the dorsal horn ipsilateral to the lesion. Up-regulation of KCC2 function by targeting 5-HT2A receptors, therefore, has therapeutic potential in the treatment of neuropathic pain induced by SCI but not by SNI.
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Affiliation(s)
- Irene Sánchez-Brualla
- Team P3M, Institut de Neurosciences de la Timone, UMR7289, Aix Marseille Université and Centre National de la Recherche Scientifique (CNRS), Marseille, France; Department of Cell Biology, Physiology, and Immunology, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Institute of Neurosciences, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Pascale Boulenguez
- Team P3M, Institut de Neurosciences de la Timone, UMR7289, Aix Marseille Université and Centre National de la Recherche Scientifique (CNRS), Marseille, France
| | - Cécile Brocard
- Team P3M, Institut de Neurosciences de la Timone, UMR7289, Aix Marseille Université and Centre National de la Recherche Scientifique (CNRS), Marseille, France
| | - Sylvie Liabeuf
- Team P3M, Institut de Neurosciences de la Timone, UMR7289, Aix Marseille Université and Centre National de la Recherche Scientifique (CNRS), Marseille, France
| | - Annelise Viallat-Lieutaud
- Team P3M, Institut de Neurosciences de la Timone, UMR7289, Aix Marseille Université and Centre National de la Recherche Scientifique (CNRS), Marseille, France
| | - Xavier Navarro
- Department of Cell Biology, Physiology, and Immunology, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Institute of Neurosciences, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Esther Udina
- Department of Cell Biology, Physiology, and Immunology, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Institute of Neurosciences, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Frédéric Brocard
- Team P3M, Institut de Neurosciences de la Timone, UMR7289, Aix Marseille Université and Centre National de la Recherche Scientifique (CNRS), Marseille, France.
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Potter LE, Doolen S, Mifflin K, Tenorio G, Baker G, Taylor BK, Kerr BJ. Antinociceptive Effects of the Antidepressant Phenelzine are Mediated by Context-Dependent Inhibition of Neuronal Responses in the Dorsal Horn. Neuroscience 2018; 383:205-215. [PMID: 29752984 DOI: 10.1016/j.neuroscience.2018.04.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 04/23/2018] [Accepted: 04/28/2018] [Indexed: 02/08/2023]
Abstract
The putative strong anti-nociceptive properties of the antidepressant phenelzine (PLZ) have not been widely explored as a treatment for pain. Antinociceptive effects of PLZ were identified in the formalin model of tonic pain (Mifflin et al., 2016) and in allodynia associated with experimental autoimmune encephalomyelitis, (EAE) a mouse model of multiple sclerosis (Potter et al., 2016). Here, we further clarify the specific types of stimuli and contexts in which PLZ modulates nociceptive sensitivity. Our findings indicate that PLZ selectively inhibits ongoing inflammatory pain while sparing transient reflexive and acute nociception. We also investigated the cellular mechanisms of action of PLZ in the dorsal horn, and as expected of a monoamine-oxidase inhibitor, PLZ increased serotonin (5HT) immunoreactivity. We next used two approaches to test the hypothesis that PLZ inhibits the activation of spinal nociresponsive neurons. First, we evaluated the formalin-evoked protein expression of the immediate early gene, c-fos. PLZ reduced Fos expression in the superficial dorsal horn. Second, we evaluated the effects of PLZ on intracellular calcium responses to superfusion of glutamate (0.3-1.0 mM) in an ex vivo lumbar spinal cord slice preparation. Superfusion with PLZ (100-300 μM) reduced 1 mM glutamate-evoked calcium responses. This was blocked by pretreatment with the 5HT1A-receptor antagonist WAY-100,635, but not the alpha-2 adrenergic antagonist idazoxan. We conclude that PLZ exerts antinociceptive effects through a 5-HT/5HT1AR-dependent inhibition of neuronal responses within nociceptive circuits of the dorsal horn.
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Affiliation(s)
- Liam E Potter
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2E1, Canada
| | - Suzanne Doolen
- Department of Physiology and the Center for Analgesia Research Excellence, University of Kentucky, Lexington, KY 40536, USA
| | - Katherine Mifflin
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2E1, Canada; Department of Psychology, University of Alberta, Edmonton, AB T6G 2E9, Canada
| | - Gustavo Tenorio
- Department of Anesthesiology and Pain Medicine, University of Alberta, Edmonton, AB T6G 2G3, Canada
| | - Glen Baker
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2E1, Canada; Department of Psychiatry (NRU), University of Alberta, Edmonton, AB T6G 2B7, Canada
| | - Bradley K Taylor
- Department of Physiology and the Center for Analgesia Research Excellence, University of Kentucky, Lexington, KY 40536, USA
| | - Bradley J Kerr
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2E1, Canada; Department of Pharmacology, University of Alberta, Edmonton, AB T6E 2H7, Canada; Department of Anesthesiology and Pain Medicine, University of Alberta, Edmonton, AB T6G 2G3, Canada.
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25
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Anversa RG, Sousa FSS, Birmann PT, Lima DB, Lenardão EJ, Bruning CA, Savegnago L. Antinociceptive and anti-inflammatory effects of 1,2-bis-(4 methoxyphenylselanyl) styrene in mice: involvement of the serotonergic system. J Pharm Pharmacol 2018; 70:901-909. [PMID: 29582424 DOI: 10.1111/jphp.12907] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 02/10/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Pain is one of the most prevalent, costly and disabling conditions that reduces quality of life. Although there are many analgesics available, there is some concern regarding their efficacy, safety and side effects. Organic selenium compounds are attractive targets of various research groups due to their pharmacological properties. OBJECTIVES The aim of this study was to evaluate the antinociceptive and anti-inflammatory activity of 1,2-bis-(4-methoxyphenylselanyl) styrene (BMOSE) in mice, as well as to investigate the mechanism involved in the antinociceptive effect. METHODS The animals were submitted to the formalin and glutamate tests. The assessment of the possible involvement of the serotonergic system in BMOSE antinociceptive activity was performed using the glutamate test. Also, we investigated the possible toxicity of the compound. KEY FINDINGS 1,2-bis-(4-methoxyphenylselanyl) styrene (0.1-50 mg/kg, i.g.) was efficient in avoiding nociception induced by glutamate and formalin and also reduced paw oedema. The possible involvement of 5-HT3 serotoninergic receptor antagonist ondansetron blocked the antinociceptive effect of BMOSE. The acute toxicity assays did not show any toxicity related to the administration of BMOSE (200 mg/kg). CONCLUSIONS It is possible to conclude that BMOSE has both antinociceptive and anti-inflammatory activity, and the serotoninergic system, more specifically, the 5-HT3 receptor, is involved in the effect.
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Affiliation(s)
- Roberta Gonçalves Anversa
- Grupo de Pesquisa em Neurobiotecnologia - GPN- Centro de Desenvolvimento Tecnológico, CDTec, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
| | - Fernanda Severo Sabedra Sousa
- Grupo de Pesquisa em Neurobiotecnologia - GPN-Programa de Pós Graduação em Bioquímica e Bioprospecção, PPGBBio, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
| | - Paloma Taborda Birmann
- Grupo de Pesquisa em Neurobiotecnologia - GPN-Programa de Pós Graduação em Bioquímica e Bioprospecção, PPGBBio, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
| | - David Borba Lima
- Laboratório de Síntese Orgânica Limpa- LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
| | - Eder João Lenardão
- Laboratório de Síntese Orgânica Limpa- LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
| | - César Augusto Bruning
- Grupo de Pesquisa em Neurobiotecnologia - GPN-Programa de Pós Graduação em Bioquímica e Bioprospecção, PPGBBio, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
| | - Lucielli Savegnago
- Grupo de Pesquisa em Neurobiotecnologia - GPN- Centro de Desenvolvimento Tecnológico, CDTec, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
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Nakamori H, Naitou K, Horii Y, Shimaoka H, Horii K, Sakai H, Yamada A, Furue H, Shiina T, Shimizu Y. Medullary raphe nuclei activate the lumbosacral defecation center through the descending serotonergic pathway to regulate colorectal motility in rats. Am J Physiol Gastrointest Liver Physiol 2018; 314:G341-G348. [PMID: 29167116 DOI: 10.1152/ajpgi.00317.2017] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Colorectal motility is regulated by two defecation centers located in the brain and spinal cord. In previous studies, we have shown that administration of serotonin (5-HT) in the lumbosacral spinal cord causes enhancement of colorectal motility. Because spinal 5-HT is derived from neurons of the medullary raphe nuclei, including the raphe magnus, raphe obscurus, and raphe pallidus, we examined whether stimulation of the medullary raphe nuclei enhances colorectal motility via the lumbosacral defecation center. Colorectal pressure was recorded with a balloon in vivo in anesthetized rats. Electrical stimulation of the medullary raphe nuclei failed to enhance colorectal motility. Because GABAergic neurons can be simultaneously activated by the raphe stimulation and released GABA masks accelerating actions of the raphe nuclei on the lumbosacral defecation center, a GABAA receptor antagonist was preinjected intrathecally to manifest excitatory responses. When spinal GABAA receptors were blocked by the antagonist, electrical stimulation of the medullary raphe nuclei increased colorectal contractions. This effect of the raphe nuclei was inhibited by intrathecal injection of 5-hydroxytryptamine type 2 (5-HT2) and type 3 (5-HT3) receptor antagonists. In addition, injection of a selective 5-HT reuptake inhibitor in the lumbosacral spinal cord augmented the raphe stimulation-induced enhancement of colorectal motility. Transection of the pelvic nerves, but not transection of the colonic nerves, prevented the effect of the raphe nuclei on colorectal motility. These results demonstrate that activation of the medullary raphe nuclei causes augmented contractions of the colorectum via 5-HT2 and 5-HT3 receptors in the lumbosacral defecation center. NEW & NOTEWORTHY We have shown that electrical stimulation of the medullary raphe nuclei causes augmented contractions of the colorectum via pelvic nerves in rats. The effect of the medullary raphe nuclei on colorectal motility is exerted through activation of 5-hydroxytryptamine type 2 and type 3 receptors in the lumbosacral defecation center. The descending serotoninergic raphespinal tract represents new potential therapeutic targets against colorectal dysmotility such as irritable bowel syndrome.
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Affiliation(s)
- Hiroyuki Nakamori
- Laboratory of Physiology, Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University , Gifu , Japan
| | - Kiyotada Naitou
- Laboratory of Physiology, Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University , Gifu , Japan
| | - Yuuki Horii
- Laboratory of Physiology, Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University , Gifu , Japan
| | - Hiroki Shimaoka
- Laboratory of Physiology, Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University , Gifu , Japan
| | - Kazuhiro Horii
- Laboratory of Physiology, Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University , Gifu , Japan
| | - Hiroki Sakai
- Laboratory of Pathology, Department of Pathogenetic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University , Gifu , Japan.,Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University , Gifu , Japan
| | - Akihiro Yamada
- Department of Information Physiology, National Institute for Physiological Sciences , Okazaki , Japan.,Department of Neurophysiology, Hyogo College of Medicine , Nishinomiya , Japan
| | - Hidemasa Furue
- Department of Information Physiology, National Institute for Physiological Sciences , Okazaki , Japan.,Department of Neurophysiology, Hyogo College of Medicine , Nishinomiya , Japan
| | - Takahiko Shiina
- Laboratory of Physiology, Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University , Gifu , Japan
| | - Yasutake Shimizu
- Laboratory of Physiology, Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University , Gifu , Japan.,Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University , Gifu , Japan
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27
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Nakamori H, Naitou K, Sano Y, Shimaoka H, Shiina T, Shimizu Y. Exogenous serotonin regulates colorectal motility via the 5-HT 2 and 5-HT 3 receptors in the spinal cord of rats. Neurogastroenterol Motil 2018; 30. [PMID: 28795477 DOI: 10.1111/nmo.13183] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 07/13/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND We previously reported that intrathecal injection of noradrenaline or dopamine causes enhancement of colorectal motility. As these monoamines are neurotransmitters of descending pain inhibitory pathways in the spinal cord, we hypothesized that serotonin, which is one of the neurotransmitters involved in descending pain inhibition, also influences the lumbosacral defecation center. Therefore, we examined whether serotonin acting on the spinal defecation center enhances colorectal motility. METHODS Colorectal intraluminal pressure and propelled liquid volume were recorded in vivo in anesthetized rats. KEY RESULTS Intrathecal injection of serotonin into the L6-S1 spinal cord elicited periodic increases in colorectal intraluminal pressure, being associated with increases in liquid output. Pharmacological experiments revealed that the effect of serotonin is mediated by both 5-HT2 and 5-HT3 receptors. The serotonin-induced enhancement of colorectal motility was unaffected even after disconnection of the defecation center from supraspinal regions by cutting the T8 spinal cord, while transection of the parasympathetic pelvic nerves prevented the colokinetic effect of serotonin. Finally, we investigated interactions among serotonin, noradrenaline and dopamine. Simultaneous administration of sub-effective doses of these monoamine neurotransmitters into the spinal cord caused propulsive colorectal motility slightly but substantially. CONCLUSIONS AND INFERENCES These results demonstrate that exogenous serotonin acts on 5-HT2 and 5-HT3 receptors in the lumbosacral defecation center and activates the parasympathetic nervous system to enhance colorectal motility in cooperation with noradrenaline and dopamine.
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Affiliation(s)
- H Nakamori
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - K Naitou
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Y Sano
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - H Shimaoka
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - T Shiina
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
| | - Y Shimizu
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Gifu, Japan
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28
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Cortes-Altamirano JL, Reyes-Long S, Olmos-Hernández A, Bonilla-Jaime H, Carrillo-Mora P, Bandala C, Alfaro-Rodriguez A. Antinociceptive and pronociceptive effect of levetiracetam in tonic pain model. Pharmacol Rep 2018; 70:385-389. [PMID: 29477948 DOI: 10.1016/j.pharep.2017.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 08/28/2017] [Accepted: 09/25/2017] [Indexed: 01/08/2023]
Abstract
BACKGROUND Levetiracetam (LEV) is a novel anticonvulsant with proven antinociceptive properties. However, the antinociceptive and pronociceptive effect of this drug has not yet been fully elucidated in a tonic pain model. METHODS Thirty-six male rats (Wistar) were randomized into six groups and underwent the formalin test as follows: rats in the control group were administered 50μL of 1% formalin in the paw; sham-group rats were administered 50μL of saline in the paw to mimick the application of formalin; the four experimental groups were administered LEV intragastrically (ig) (50, 100, 200 and 300mg/kg), and 40min later 50μL of 1% formalin was injected in the paw. RESULTS LEV exhibited antinociceptive effect in the 300mg/kg LEV group (p<0.05) and a pronociceptive effect in the 100mg/kg LEV group (p<0.05) and in the 50mg/kg LEV group (p<0.001). CONCLUSIONS The antinociceptive and pronociceptive effect of LEV in a tonic pain model is dose-dependent.
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Affiliation(s)
- José Luis Cortes-Altamirano
- PhD Program in Biological and Health Sciences, Universidad Autónoma Metropolitana (UAM) Iztapalapa-Xochimilco-Cuajimalpa, Mexico City, Mexico
| | - Samuel Reyes-Long
- Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México (UNAM), Tlalnepantla, Estado de México, Mexico
| | - Adriana Olmos-Hernández
- Department of Neurosciences, National Rehabilitation Institute "Luis Guillermo Ibarra Ibarra" (INR) Secretaría de Salud (SSA), Mexico City, Mexico
| | - Herlinda Bonilla-Jaime
- Departament of Reproductive Biology, Universidad Autónoma Metropolitana (UAM) Campus Iztapalapa, Mexico City, Mexico
| | - Paul Carrillo-Mora
- Department of Neurosciences, National Rehabilitation Institute "Luis Guillermo Ibarra Ibarra" (INR) Secretaría de Salud (SSA), Mexico City, Mexico
| | - Cindy Bandala
- Department of Neurosciences, National Rehabilitation Institute "Luis Guillermo Ibarra Ibarra" (INR) Secretaría de Salud (SSA), Mexico City, Mexico
| | - Alfonso Alfaro-Rodriguez
- Department of Neurosciences, National Rehabilitation Institute "Luis Guillermo Ibarra Ibarra" (INR) Secretaría de Salud (SSA), Mexico City, Mexico.
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30
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Sousa FS, Anversa RG, Birmann PT, de Souza MN, Balaguez R, Alves D, Luchese C, Wilhelm EA, Savegnago L. Contribution of dopaminergic and noradrenergic systems in the antinociceptive effect of α-(phenylalanyl) acetophenone. Pharmacol Rep 2017. [DOI: 10.1016/j.pharep.2017.03.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Wattiez AS, Dupuis A, Privat AM, Chalus M, Chapuy E, Aissouni Y, Eschalier A, Courteix C. Disruption of 5-HT 2A-PDZ protein interaction differently affects the analgesic efficacy of SSRI, SNRI and TCA in the treatment of traumatic neuropathic pain in rats. Neuropharmacology 2017; 125:308-318. [PMID: 28780039 DOI: 10.1016/j.neuropharm.2017.07.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 07/27/2017] [Accepted: 07/31/2017] [Indexed: 01/17/2023]
Abstract
Antidepressants remain one of the first line treatments prescribed to neuropathic pain patients despite their limited efficacy and/or their numerous side effects. More and more, pharmacotherapy for neuropathic pain has evolved towards the use of therapeutic combinations. The goal of the present study was to assess the efficacy of the combination of antidepressants - selective serotonin reuptake inhibitors and serotonin-noradrenaline reuptake inhibitors-with a peptide (TAT-2ASCV) able to disrupt the interaction between serotonin type 2A (5-HT2A) receptors and associated PDZ proteins. Mechanical hypersensitivity was assessed in sciatic nerve ligation-induced neuropathic pain in rats using paw pressure test after acute treatment with TAT-2ASCV alone or in combination with repeated treatment with fluoxetine or duloxetine or clomipramine. First, we validated the anti-hyperalgesic effect of TAT-2ASCV on mechanical hypersensitivity at the dose of 100 ng/rat (single i.t. injection). Second, using selective receptor antagonists, we found that the effect of TAT-2ASCV on mechanical hypersensitivity involves 5-HT2A as well as GABAA receptors. Finally, we showed that the association of TAT-2ASCV (100 ng, single i.t. injection) with fluoxetine (10 mg/kg, five i.p. injections) reveals its anti-hyperalgesic effect, while the association with duloxetine (1 mg/kg, five i.p. injections) or clomipramine (2.5 mg/kg, five i.p. injections) is only additive. Those results further accentuate the interest to develop small molecules acting like TAT-2ASCV in order to treat neuropathic pain as a monotherapy or in combination with antidepressants.
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Affiliation(s)
- Anne-Sophie Wattiez
- Université Clermont Auvergne, INSERM U1107, NEURO-DOL, F-63000 Clermont-Ferrand, France
| | - Amandine Dupuis
- Université Clermont Auvergne, INSERM U1107, NEURO-DOL, F-63000 Clermont-Ferrand, France
| | - Anne-Marie Privat
- Université Clermont Auvergne, INSERM U1107, NEURO-DOL, F-63000 Clermont-Ferrand, France
| | - Maryse Chalus
- Université Clermont Auvergne, INSERM U1107, NEURO-DOL, F-63000 Clermont-Ferrand, France
| | - Eric Chapuy
- Université Clermont Auvergne, INSERM U1107, NEURO-DOL, F-63000 Clermont-Ferrand, France
| | - Youssef Aissouni
- Université Clermont Auvergne, INSERM U1107, NEURO-DOL, F-63000 Clermont-Ferrand, France
| | - Alain Eschalier
- Université Clermont Auvergne, INSERM U1107, NEURO-DOL, F-63000 Clermont-Ferrand, France
| | - Christine Courteix
- Université Clermont Auvergne, INSERM U1107, NEURO-DOL, F-63000 Clermont-Ferrand, France.
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Silva VDG, Reis AS, Pinz MP, da Fonseca CAR, Duarte LFB, Roehrs JA, Alves D, Luchese C, Wilhelm EA. Further analysis of acute antinociceptive and anti-inflammatory actions of 4-phenylselenyl-7-chloroquinoline in mice. Fundam Clin Pharmacol 2017; 31:513-525. [PMID: 28543930 DOI: 10.1111/fcp.12295] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 04/24/2017] [Accepted: 05/19/2017] [Indexed: 12/11/2022]
Abstract
A new quinoline containing selenium, 4-phenylselenyl-7-chloroquinoline (4-PSQ), was described and synthetized by our research group. Recently, we demonstrated the potential antinociceptive and anti-inflammatory of 4-PSQ. For this reason, the first objective of this study was to expand our previous findings by investigating the contribution of glutamatergic, serotonergic, and nitrergic systems to the acute antinociceptive action of this compound. Pretreatment with 4-PSQ (0.01-25 mg/kg, p.o.) reduced the nociception induced by glutamate. MK-801 (an uncompetitive antagonist of the N-Methyl-d-aspartate (NMDA) receptor) blocked the antinociceptive effect exerted by 4-PSQ (25 mg/kg, p.o.) in the acetic acid-induced abdominal writhing test. The pretreatment with WAY100635 (a selective antagonist of 5-HT1A receptor), ketanserin (a selective antagonist of 5-HT2A/2C receptor), and pindolol (a nonselective antagonist of 5-HT1A/1B receptors) partially blocked the antinociceptive effect caused by 4-PSQ (25 mg/kg, per oral, p.o.) in the acetic acid-induced abdominal writhing test. Nitric oxide precursor, l-arginine hydrochloride, partially reversed antinociception caused by 4-PSQ or ω-nitro-l-arginine (l-NOARG). Treatments did not modify the locomotor and exploratory activities of mice. Additionally, the acute anti-inflammatory effect of 4-PSQ in a model of pleurisy induced by carrageenan in mice was investigated. 4-PSQ reduced the cellular migration, pleural exudate accumulation, and myeloperoxidase activity induced by carrageenan exposure. 4-PSQ protected against the increase in reactive species levels and reduction of nonprotein thiol levels induced by carrageenan. Data presented here showed that the modulation of serotonergic, nitrergic, and glutamatergic systems contributed to the antinociceptive effect of 4-PSQ and it reinforced the therapeutic potential of this quinolinic compound for acute inflammation.
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Affiliation(s)
- Vanessa D G Silva
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Angélica S Reis
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Mikaela P Pinz
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Caren A R da Fonseca
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Luis Fernando B Duarte
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Juliano A Roehrs
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Cristiane Luchese
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Ethel A Wilhelm
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
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Gautier A, El Ouaraki H, Bazin N, Salam S, Vodjdani G, Bourgoin S, Pezet S, Bernard JF, Hamon M. Lentiviral vector-driven inhibition of 5-HT synthesis in B3 bulbo-spinal serotonergic projections – Consequences on nociception, inflammatory and neuropathic pain in rats. Exp Neurol 2017; 288:11-24. [DOI: 10.1016/j.expneurol.2016.10.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/24/2016] [Accepted: 10/27/2016] [Indexed: 01/19/2023]
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Miranda HF, Sierralta F, Aranda N, Noriega V, Prieto JC. Pharmacological profile of dexketoprofen in orofacial pain. Pharmacol Rep 2016; 68:1111-1114. [DOI: 10.1016/j.pharep.2016.06.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 06/20/2016] [Accepted: 06/22/2016] [Indexed: 12/16/2022]
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Tian B, Wang XL, Huang Y, Chen LH, Cheng RX, Zhou FM, Guo R, Li JC, Liu T. Peripheral and spinal 5-HT receptors participate in cholestatic itch and antinociception induced by bile duct ligation in rats. Sci Rep 2016; 6:36286. [PMID: 27824106 PMCID: PMC5099756 DOI: 10.1038/srep36286] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 10/13/2016] [Indexed: 12/19/2022] Open
Abstract
Although 5-HT has been implicated in cholestatic itch and antinociception, two common phenomena in patients with cholestatic disease, the roles of 5-HT receptor subtypes are unclear. Herein, we investigated the roles of 5-HT receptors in itch and antinociception associated with cholestasis, which was induced by common bile duct ligation (BDL) in rats. 5-HT-induced enhanced scratching and antinociception to mechanical and heat stimuli were demonstrated in BDL rats. 5-HT level in the skin and spinal cord was significantly increased in BDL rats. Quantitative RT-PCR analysis showed 5-HT1B, 5-HT1D, 5-HT2A, 5-HT3A, 5-HT5B, 5-HT6, and 5-HT7 were up-regulated in peripheral nervous system and 5-HT1A, 5-HT1F, 5-HT2B, and 5-HT3A were down-regulated in the spinal cord of BDL rats. Intradermal 5-HT2, 5-HT3, and 5-HT7 receptor agonists induced scratching in BDL rats, whereas 5-HT3 agonist did not induce scratching in sham rats. 5-HT1A, 5-HT2, 5-HT3, and 5-HT7 agonists or antagonists suppressed itch in BDL rats. 5-HT1A agonist attenuated, but 5-HT1A antagonist enhanced antinociception in BDL rats. 5-HT2 and 5-HT3 agonists or antagonists attenuated antinociception in BDL rats. Our data suggested peripheral and central 5-HT system dynamically participated in itch and antinociception under cholestasis condition and targeting 5-HT receptors may be an effective treatment for cholestatic itch.
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Affiliation(s)
- Bin Tian
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Xue-Long Wang
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Ya Huang
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Li-Hua Chen
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, School of Public Health, Soochow University, Suzhou, 215123, China
| | - Ruo-Xiao Cheng
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Feng-Ming Zhou
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Ran Guo
- Department of Anesthesiology, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - Jun-Cheng Li
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Tong Liu
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, 215123, China
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Chia JSM, Omar Farouk AA, Mohamad AS, Sulaiman MR, Perimal EK. Zerumbone alleviates chronic constriction injury-induced allodynia and hyperalgesia through serotonin 5-HT receptors. Biomed Pharmacother 2016; 83:1303-1310. [PMID: 27570173 DOI: 10.1016/j.biopha.2016.08.052] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/09/2016] [Accepted: 08/19/2016] [Indexed: 12/13/2022] Open
Abstract
Zerumbone, a bioactive sesquiterpene isolated from Zingiber zerumbet (Smith), has shown to exert antiallodynic and antihyperalgesic effects in neuropathic pain mice model in our recent study. The mechanism through which zerumbone alleviates neuropathic pain has yet to be elucidated. Thus, this study aimed to determine whether the serotonergic system, part of the descending pain modulation pathway, contributes to the antineuropathic effect of zerumbone. Participation of the serotonergic system in zerumbone-induced antiallodynia and antihyperalgesia was assessed using Dynamic Plantar Aesthesiometer von Frey test and Hargreaves plantar test respectively in chronic-constriction injury mice model. Administration of ρ-chlorophenylalanine (PCPA, 100mg/kg, i.p.) for four consecutive days to deplete serotonin (5-HT) prior to zerumbone administration blocked the antiallodynic and antihyperalgesic effects of zerumbone. Further investigation with 5-HT receptor antagonists methiothepin (5-HT1/6/7 receptor antagonist, 0.1mg/kg), WAY-100635 (5-HT1A receptor antagonist, 1mg/kg), isamoltane (5-HT1B receptor antagonist, 2.5mg/kg), ketanserin (5-HT2A receptor antagonist, 0.3mg/kg) and ondansetron (5-HT3 receptor antagonist, 0.5mg/kg) managed to significantly attenuate antiallodynic and antihyperalgesic effects of zerumbone (10mg/kg). These findings demonstrate that zerumbone alleviates mechanical allodynia and thermal hyperalgesia through the descending serotonergic system via 5-HT receptors 1A, 1B, 2A, 3, 6 and 7 in chronic constriction injury neuropathic pain mice.
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Affiliation(s)
- Jasmine Siew Min Chia
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Ahmad Akira Omar Farouk
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Azam Shah Mohamad
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Mohd Roslan Sulaiman
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Enoch Kumar Perimal
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
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Dupuis A, Wattiez AS, Pinguet J, Richard D, Libert F, Chalus M, Aissouni Y, Sion B, Ardid D, Marin P, Eschalier A, Courteix C. Increasing spinal 5-HT 2A receptor responsiveness mediates anti-allodynic effect and potentiates fluoxetine efficacy in neuropathic rats. Evidence for GABA release. Pharmacol Res 2016; 118:93-103. [PMID: 27663259 DOI: 10.1016/j.phrs.2016.09.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 09/17/2016] [Accepted: 09/19/2016] [Indexed: 01/13/2023]
Abstract
Antidepressants are one of the first line treatments for neuropathic pain but their use is limited by the incidence and severity of side effects of tricyclics and the weak effectiveness of selective serotonin reuptake inhibitors (SSRIs). Serotonin type 2A (5-HT2A) receptors interact with PDZ proteins that regulate their functionality and SSRI efficacy to alleviate pain. We investigated whether an interfering peptide (TAT-2ASCV) disrupting the interaction between 5-HT2A receptors and associated PDZ proteins would improve the treatment of traumatic neuropathic allodynia. Tactile allodynia was assessed in spinal nerve ligation-induced neuropathic pain in rats using von Frey filaments after acute treatment with TAT-2ASCV and/or 5-HT2A receptor agonist, alone or in combination with repeated treatment with fluoxetine. In vivo microdialysis was performed in order to examine the involvement of GABA in TAT-2ASCV/fluoxetine treatment-associated analgesia. TAT-2ASCV (100ng, single i.t. injection) improved SNL-induced tactile allodynia by increasing 5-HT2A receptor responsiveness to endogenous 5-HT. Fluoxetine alone (10mg/kg, five i.p. injections) slightly increased tactile thresholds and its co-administration with TAT-2ASCV (100ng, single i.t. injection) further enhanced the anti-allodynic effect. This effect depends on the integrity of descending serotonergic bulbospinal pathways and spinal release of GABA. The anti-allodynic effect of fluoxetine can be enhanced by disrupting 5-HT2A receptor-PDZ protein interactions. This enhancement depends on 5-HT2A receptor activation, spinal GABA release and GABAA receptor activation.
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Affiliation(s)
- Amandine Dupuis
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France
| | - Anne-Sophie Wattiez
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France
| | - Jérémy Pinguet
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Service de Pharmacologie, Clermont-Ferrand, France
| | - Damien Richard
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Service de Pharmacologie, Clermont-Ferrand, France
| | - Frédéric Libert
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Service de Pharmacologie, Clermont-Ferrand, France
| | - Maryse Chalus
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France
| | - Youssef Aissouni
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France
| | - Benoit Sion
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France
| | - Denis Ardid
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France
| | - Philippe Marin
- Institut de Génomique Fonctionnelle, CNRS, UMR 5203, INSERM U1191, Université de Montpellier, F-34094 Montpellier Cedex 5, France
| | - Alain Eschalier
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Service de Pharmacologie, Clermont-Ferrand, France
| | - Christine Courteix
- INSERM, U 1107, Neuro-Dol, F-63001 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, BP 10448, F-63000 Clermont-Ferrand, France.
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Furuya-da-Cunha EM, Souza RRD, Canto-de-Souza A. Rat exposure in mice with neuropathic pain induces fear and antinociception that is not reversed by 5-HT2C receptor activation in the dorsal periaqueductal gray. Behav Brain Res 2016; 307:250-7. [PMID: 27059332 DOI: 10.1016/j.bbr.2016.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 04/01/2016] [Accepted: 04/04/2016] [Indexed: 01/14/2023]
Abstract
Previous studies have demonstrated that serotonin 5-HT2C receptors in the dorsal periaqueductal gray (dPAG) mediate both anxiety and antinociception in mice submitted to the elevated plus maze. The present study examined the effects of intra-dPAG infusion of the serotonin 5-HT2C receptor agonist (MK-212) in the defensive reactions and antinociception in mice with neurophatic pain confronted by a predator. Neuropathic pain was induced by chronic constriction injury (CCI) of the sciatic nerve, and predator confrontation was performed using the rat exposure test (RET). Our results demonstrated that both sham-operated and CCI mice exhibited intense defensive reactions when confronted by rats. However, rat-exposed CCI mice showed reduced pain reactivity in comparison to CCI mice exposed to a toy rat. Intra-dPAG infusion of MK-212 prior to predator exposure did not significantly alter defensive or antinociceptive responses. To our knowledge, our results represent the first evidence of RET-induced antinociception in mice. Moreover, the results of the present study suggest that 5-HT2C receptor activation in the dPAG is not critically involved in the control of predator-evoked fearful or antinociceptive responses.
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Affiliation(s)
- Elke Mayumi Furuya-da-Cunha
- Psychobiology Group/Department of Psychology/CECH-UFSCar, São Carlos, SP, 13565-905, Brazil; Joint Graduate Program in Physiological Sciences UFSCar/UNESP. Rod. Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil
| | - Rimenez Rodrigues de Souza
- Psychobiology Group/Department of Psychology/CECH-UFSCar, São Carlos, SP, 13565-905, Brazil; Graduate Program in Psychology UFSCar. Rod. Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil
| | - Azair Canto-de-Souza
- Psychobiology Group/Department of Psychology/CECH-UFSCar, São Carlos, SP, 13565-905, Brazil; Joint Graduate Program in Physiological Sciences UFSCar/UNESP. Rod. Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil; Graduate Program in Psychology UFSCar. Rod. Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil; Neuroscience and Behavioral Institute, Av. do Café, 2.450, 14050-220 Ribeirão Preto, SP, Brazil.
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Greco MC, Navarra P, Tringali G. The analgesic agent tapentadol inhibits calcitonin gene-related peptide release from isolated rat brainstem via a serotonergic mechanism. Life Sci 2015; 145:161-5. [PMID: 26706288 DOI: 10.1016/j.lfs.2015.12.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 10/23/2015] [Accepted: 12/14/2015] [Indexed: 12/26/2022]
Abstract
AIMS In this study we tested the hypothesis that tapentadol inhibits GGRP release from the rat brainstem through a mechanism mediated by the inhibition of NA reuptake; as a second alternative hypothesis, we investigated whether tapentadol inhibits GGRP release via the inhibition of 5-HT reuptake. METHODS Rat brainstems were explanted and incubated in short-term experiments. CGRP released in the incubation medium was taken as a marker of CGRP release from the central terminals of trigeminal neurons within the brainstem. CGRP levels were measured by radioimmunoassay under basal conditions or in the presence of tapentadol; NA, 5-HT, clonidine, yohimbine and ondansetron were used as pharmacological tools to investigate the action mechanism of tapentadol. RESULTS The α2-antagonist yohimbine failed to counteract the effects of tapentadol. Moreover, neither NA nor the α2-agonist clonidine per se inhibited K(+)-stimulated CGRP release, thereby indicating that the effects of tapentadol are nor mediated through the block of NA reuptake. Further experiments showed that 5-HT and tramadol, which inhibits both NA and 5-HT reuptake, significantly reduced K(+)-stimulated CGRP release. Moreover, the 5-HT3 antagonist ondansetron was able to counteract the effects of tapentadol in this system. SIGNIFICANCE This study provided pharmacological evidence that tapentadol inhibits stimulated CGRP release from the rat brainstem in vitro through a mechanism involving an increase in 5-HT levels in the system and the subsequent activation of 5-HT3 receptors.
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Affiliation(s)
| | - Pierluigi Navarra
- Institute of Pharmacology, Catholic University Medical School, Rome, Italy.
| | - Giuseppe Tringali
- Institute of Pharmacology, Catholic University Medical School, Rome, Italy
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Johansen SL, Iceman KE, Iceman CR, Taylor BE, Harris MB. Isoflurane causes concentration-dependent inhibition of medullary raphé 5-HT neurons in situ. Auton Neurosci 2015. [PMID: 26213357 DOI: 10.1016/j.autneu.2015.07.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Anesthetics have a profound influence on a myriad of autonomic processes. Mechanisms of general anesthesia, and how these mechanisms give rise to the multifaceted state of anesthesia, are largely unknown. The ascending and descending serotonin (5-HT) networks are key modulators of autonomic pathways, and are critically involved in homeostatic reflexes across the motor, somatosensory, limbic and autonomic systems. These 5-HT networks are thought to contribute to anesthetic effects, but how anesthetics affect 5-HT neuron function remains a pertinent question. We hypothesized that the volatile anesthetic isoflurane inhibits action potential discharge of medullary raphé 5-HT neurons. METHODS We conducted extracellular recordings on individual neurons in the medullary raphé region of the unanesthetized in situ perfused brainstem preparation to determine how exposure to isoflurane affects 5-HT neurons. We examined changes in 5-HT neuron baseline firing in response to treatment with either 1, 1.5, or 2% isoflurane. We measured isoflurane concentrations by gas chromatography-mass spectrometry (GC-MS) analysis. RESULTS Exposure to isoflurane inhibited action potential discharge in raphé 5-HT neurons. We document a concentration-dependent inhibition over a range of concentrations approximating isoflurane MAC (minimum alveolar concentration required for surgical anesthesia). Delivered concentrations of isoflurane were confirmed using GC-MS analysis. CONCLUSIONS These findings illustrate that halogenated anesthetics greatly affect 5-HT neuron firing and suggest 5-HT neuron contributions to mechanisms of general anesthesia.
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Affiliation(s)
- S L Johansen
- Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska, Fairbanks, AK 99775, USA
| | - K E Iceman
- Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska, Fairbanks, AK 99775, USA
| | - C R Iceman
- Department of Chemistry and Biochemistry, University of Alaska, Fairbanks, AK 99775, USA
| | - B E Taylor
- Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska, Fairbanks, AK 99775, USA
| | - M B Harris
- Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska, Fairbanks, AK 99775, USA.
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Tazawa T, Kamiya Y, Kobayashi A, Saeki K, Takiguchi M, Nakahashi Y, Shinbori H, Funakoshi K, Goto T. Spinal cord stimulation modulates supraspinal centers of the descending antinociceptive system in rats with unilateral spinal nerve injury. Mol Pain 2015; 11:36. [PMID: 26104415 PMCID: PMC4479321 DOI: 10.1186/s12990-015-0039-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 06/11/2015] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The descending antinociceptive system (DAS) is thought to play crucial roles in the antinociceptive effect of spinal cord stimulation (SCS), especially through its serotonergic pathway. The nucleus raphe magnus (NRM) in the rostral ventromedial medulla is a major source of serotonin [5-hydroxytryptamine (5-HT)] to the DAS, but the role of the dorsal raphe nucleus (DRN) in the ventral periaqueductal gray matter is still unclear. Moreover, the influence of the noradrenergic pathway is largely unknown. In this study, we evaluated the involvement of these serotonergic and noradrenergic pathways in SCS-induced antinociception by behavioral analysis of spinal nerve-ligated (SNL) rats. We also investigated immunohistochemical changes in the DRN and locus coeruleus (LC), regarded as the adrenergic center of the DAS, and expression changes of synthetic enzymes of 5-HT [tryptophan hydroxylase (TPH)] and norepinephrine [dopamine β-hydroxylase (DβH)] in the spinal dorsal horn. RESULTS Intrathecally administered methysergide, a 5-HT1- and 5-HT2-receptor antagonist, and idazoxan, an α2-adrenergic receptor antagonist, equally abolished the antinociceptive effect of SCS. The numbers of TPH-positive serotonergic and phosphorylated cyclic AMP response element binding protein (pCREB)-positive neurons and percentage of pCREB-positive serotonergic neurons in the DRN significantly increased after 3-h SCS. Further, the ipsilateral-to-contralateral immunoreactivity ratio of DβH increased in the LC of SNL rats and reached the level seen in naïve rats, even though the number of pCREB-positive neurons in the LC was unchanged by SNL and SCS. Moreover, 3-h SCS did not increase the expression levels of TPH and DβH in the spinal dorsal horn. CONCLUSIONS The serotonergic and noradrenergic pathways of the DAS are involved in the antinociceptive effect of SCS, but activation of the DRN might primarily be responsible for this effect, and the LC may have a smaller contribution. SCS does not potentiate the synthetic enzymes of 5HT and norepinephrine in the neuropathic spinal cord.
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Affiliation(s)
- Toshiharu Tazawa
- Department of Anesthesiology, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
- Pain Mechanism Research Group, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
| | - Yoshinori Kamiya
- Department of Neuroanatomy, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
- Pain Mechanism Research Group, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
- Division of Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
| | - Ayako Kobayashi
- Department of Anesthesiology, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
| | - Kensuke Saeki
- Department of Neuroanatomy, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
| | - Masahito Takiguchi
- Department of Neuroanatomy, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
| | - Yusuke Nakahashi
- Department of Anesthesiology, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
- Pain Mechanism Research Group, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
| | - Hironobu Shinbori
- Department of Anesthesiology, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
| | - Kengo Funakoshi
- Department of Neuroanatomy, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
| | - Takahisa Goto
- Department of Anesthesiology, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
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Tramadol and Tramadol+Caffeine Synergism in the Rat Formalin Test Are Mediated by Central Opioid and Serotonergic Mechanisms. BIOMED RESEARCH INTERNATIONAL 2015; 2015:686424. [PMID: 26146627 PMCID: PMC4471251 DOI: 10.1155/2015/686424] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 05/15/2015] [Accepted: 05/17/2015] [Indexed: 01/08/2023]
Abstract
Different analgesic combinations with caffeine have shown this drug to be capable of increasing the analgesic effect. Many combinations with nonsteroidal anti-inflammatory drugs (NSAIDs) have been carried out, but, in regard to opioids, only combinations with morphine and tramadol have been reported. The antinociceptive synergism mechanism of these combinations is not well understood. The purpose of the present study was to determine the participation of spinal and supraspinal opioidergic and serotonergic systems in the synergic effect of the tramadol+caffeine combination in the rat formalin test. At the supraspinal level, the opioid antagonist, naloxone, completely reversed the effect of the drug combination, whereas ketanserin, a 5-HT2 receptor antagonist, inhibited the effect by 60%; however, ondansetron, a 5-HT3 receptor antagonist, did not alter the combination effect. When the antagonists were intrathecally administered, there was a significant reduction in all tramadol-caffeine combination effects. With respect to tramadol alone, there was significant participation of the opioid system at the supraspinal level, whereas it was the serotonergic system that participated at the spinal level by means of the two receptors studied. In conclusion, the tramadol+caffeine combination synergically activated the opioid and serotonergic systems at the supraspinal level, as well as at the spinal level, to produce the antinociception.
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Kim JM, Jeong SW, Yang J, Lee SH, Kim WM, Jeong S, Bae HB, Yoon MH, Choi JI. Spinal 5-HT1A, not the 5-HT1B or 5-HT3 receptors, mediates descending serotonergic inhibition for late-phase mechanical allodynia of carrageenan-induced peripheral inflammation. Neurosci Lett 2015; 600:91-7. [PMID: 26037417 DOI: 10.1016/j.neulet.2015.05.058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 05/21/2015] [Accepted: 05/23/2015] [Indexed: 11/26/2022]
Abstract
Previous electrophysiological studies demonstrated a limited role of 5-hydroxytryptamine 3 receptor (5-HT3R), but facilitatory role of 5-HT1AR and 5-HT1BR in spinal nociceptive processing of carrageenan-induced inflammatory pain. The release of spinal 5-HT was shown to peak in early-phase and return to baseline in late-phase of carrageenan inflammation. We examined the role of the descending serotonergic projections involving 5-HT1AR, 5-HT1BR, and 5-HT3R in mechanical allodynia of early- (first 4h) and late-phase (24h after) carrageenan-induced inflammation. Intrathecal administration of 5-HT produced a significant anti-allodynic effect in late-phase, but not in early-phase. Similarly, intrathecal 5-HT1AR agonist (8-OH-DPAT) attenuated the intensity of late-phase allodynia in a dose dependent fashion which was antagonized by 5-HT1AR antagonist (WAY-100635), but produced no effect on the early-phase allodynia. However, other agonists or antagonists of 5-HT1BR (CP-93129, SB-224289) and 5-HT3R (m-CPBG, ondansetron) did not produce any anti- or pro-allodynic effect in both early- and late- phase allodynia. These results suggest that spinal 5-HT1A, but not 5-HT1B or 5-HT3 receptors mediate descending serotonergic inhibition on nociceptive processing of late-phase mechanical allodynia in carrageenan-induced inflammation.
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Affiliation(s)
- Joung Min Kim
- Department of Anesthesiology and Pain Medicine, Chonnam National University, Medical School and Hospital, Gwangju, Republic of Korea
| | - Seong Wook Jeong
- Department of Anesthesiology and Pain Medicine, Chonnam National University, Medical School and Hospital, Gwangju, Republic of Korea
| | - Jihoon Yang
- Center for Creative Biomedical Scientists, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Seong Heon Lee
- Department of Anesthesiology and Pain Medicine, Chonnam National University, Medical School and Hospital, Gwangju, Republic of Korea
| | - Woon Mo Kim
- Department of Anesthesiology and Pain Medicine, Chonnam National University, Medical School and Hospital, Gwangju, Republic of Korea; Center for Creative Biomedical Scientists, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Seongtae Jeong
- Department of Anesthesiology and Pain Medicine, Chonnam National University, Medical School and Hospital, Gwangju, Republic of Korea
| | - Hong Beom Bae
- Department of Anesthesiology and Pain Medicine, Chonnam National University, Medical School and Hospital, Gwangju, Republic of Korea; Center for Creative Biomedical Scientists, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Myung Ha Yoon
- Department of Anesthesiology and Pain Medicine, Chonnam National University, Medical School and Hospital, Gwangju, Republic of Korea; Center for Creative Biomedical Scientists, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jeong Il Choi
- Department of Anesthesiology and Pain Medicine, Chonnam National University, Medical School and Hospital, Gwangju, Republic of Korea; Center for Creative Biomedical Scientists, Chonnam National University Medical School, Gwangju, Republic of Korea.
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Austin PJ, Bembrick AL, Denyer GS, Keay KA. Injury-Dependent and Disability-Specific Lumbar Spinal Gene Regulation following Sciatic Nerve Injury in the Rat. PLoS One 2015; 10:e0124755. [PMID: 25905723 PMCID: PMC4408097 DOI: 10.1371/journal.pone.0124755] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 03/06/2015] [Indexed: 12/23/2022] Open
Abstract
Allodynia, hyperalgesia and spontaneous pain are cardinal sensory signs of neuropathic pain. Clinically, many neuropathic pain patients experience affective-motivational state changes, including reduced familial and social interactions, decreased motivation, anhedonia and depression which are severely debilitating. In earlier studies we have shown that sciatic nerve chronic constriction injury (CCI) disrupts social interactions, sleep-wake-cycle and endocrine function in one third of rats, a subgroup reliably identified six days after injury. CCI consistently produces allodynia and hyperalgesia, the intensity of which was unrelated either to the altered social interactions, sleep-wake-cycle or endocrine changes. This decoupling of the sensory consequences of nerve injury from the affective-motivational changes is reported in both animal experiments and human clinical data. The sensory changes triggered by CCI are mediated primarily by functional changes in the lumbar dorsal horn, however, whether lumbar spinal changes may drive different affective-motivational states has never been considered. In these studies, we used microarrays to identify the unique transcriptomes of rats with altered social behaviours following sciatic CCI to determine whether specific patterns of lumbar spinal adaptations characterised this subgroup. Rats underwent CCI and on the basis of reductions in dominance behaviour in resident-intruder social interactions were categorised as having Pain & Disability, Pain & Transient Disability or Pain alone. We examined the lumbar spinal transcriptomes two and six days after CCI. Fifty-four ‘disability-specific’ genes were identified. Sixty-five percent were unique to Pain & Disability rats, two-thirds of which were associated with neurotransmission, inflammation and/or cellular stress. In contrast, 40% of genes differentially regulated in rats without disabilities were involved with more general homeostatic processes (cellular structure, transcription or translation). We suggest that these patterns of gene expression lead to either the expression of disability, or to resilience and recovery, by modifying local spinal circuitry at the origin of ascending supraspinal pathways.
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Affiliation(s)
- Paul J. Austin
- School of Medical Sciences (Anatomy & Histology), The University of Sydney, Sydney, NSW, Australia
| | - Alison L. Bembrick
- School of Medical Sciences (Anatomy & Histology), The University of Sydney, Sydney, NSW, Australia
| | - Gareth S. Denyer
- School of Molecular Bioscience, The University of Sydney, Sydney, NSW, Australia
| | - Kevin A. Keay
- School of Medical Sciences (Anatomy & Histology), The University of Sydney, Sydney, NSW, Australia
- * E-mail:
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Pineda-Farias JB, Velázquez-Lagunas I, Barragán-Iglesias P, Cervantes-Durán C, Granados-Soto V. 5-HT 2B Receptor Antagonists Reduce Nerve Injury-Induced Tactile Allodynia and Expression of 5-HT 2B Receptors. Drug Dev Res 2015; 76:31-39. [PMID: 25620128 DOI: 10.1002/ddr.21238] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 12/10/2014] [Indexed: 01/01/2023]
Abstract
Preclinical Research This work was performed to assess the effects of intrathecal serotonin 2B (5-HT2B ) receptor antagonists in rats with neuropathic pain. With RS-127445, its effect was also determined on 5-HT2B receptor expression. Neuropathic pain was induced by L5/L6 spinal nerve ligation. Western blotting was used to determine 5-HT2B receptor expression. Dose-response curves with the 5-HT2B receptor antagonists 2-amino-4-(4-fluoronaphth-1-yl)-6-isopropylpyridine (RS-127445, 1-100 nmol) and 1-[(2-chloro-3,4-dimethoxyphenyl)methyl]-2,3,4,9-tetrahydro-6-methyl-1H-pyrido[3,4-b]indole hydrochloride (LY-266097, 1-100 nmol) were performed in rats. Tactile allodynia of the left hind paw (ipsilateral) was assessed for 8 h after compound administration. Intrathecal injection of the 5-HT2B receptor antagonists RS-127445 and LY-266097 diminished spinal nerve ligation-induced allodynia. In contrast, intrathecal injection of the 5-HT2 receptor agonist (±)-2,5-dimethoxy-4-iodoamphetamine hydrochloride (DOI, 10 nmol) did not modify tactile allodynia induced by nerve ligation. L5/L6 nerve ligation increased expression of the 5-HT2B receptors in the ipsilateral, but not contralateral, dorsal root ganglia. Furthermore, nerve injury also enhanced 5-HT2B receptor expression in the ipsilateral dorsal part of the spinal cord. Intrathecal treatment with RS-127445 (100 nmol) diminished spinal nerve injury-induced increased expression of 5-HT2B receptors in dorsal root ganglia and spinal cord. Our results imply that spinal 5-HT2B receptors are present on sites related to nociception and participate in neuropathic pain. © 2014 Wiley Periodicals, Inc.
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Affiliation(s)
- Jorge B Pineda-Farias
- Neurobiology of Pain Laboratory, Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados (Cinvestav), Sede Sur. México, D.F., México
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Brüning CA, Gai BM, Soares SM, Martini F, Nogueira CW. Serotonergic systems are implicated in antinociceptive effect of m -trifluoromethyl diphenyl diselenide in the mouse glutamate test. Pharmacol Biochem Behav 2014; 125:15-20. [DOI: 10.1016/j.pbb.2014.08.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 08/01/2014] [Accepted: 08/09/2014] [Indexed: 12/25/2022]
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The antinociceptive effect of intravenous imipramine in colorectal distension-induced visceral pain in rats: The role of serotonergic and noradrenergic receptors. Pharmacol Biochem Behav 2014; 122:1-6. [DOI: 10.1016/j.pbb.2014.02.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 02/19/2014] [Accepted: 02/20/2014] [Indexed: 11/20/2022]
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Shah SMM, Sadiq A, Shah SMH, Ullah F. Antioxidant, total phenolic contents and antinociceptive potential of Teucrium stocksianum methanolic extract in different animal models. Altern Ther Health Med 2014; 14:181. [PMID: 24893601 PMCID: PMC4059475 DOI: 10.1186/1472-6882-14-181] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Accepted: 05/20/2014] [Indexed: 12/30/2022]
Abstract
Background Oxidative stress and analgesia are connected with different pathological conditions. The drug candidates from synthetic sources are associated with various side effects; therefore, researchers are giving priority to find novel, effective and safe phytomedicines. Teucrium species possesses antioxidant, analgesic, anti-inflammatory and hepatoprotective activities. The essential oils of Teucrium stocksianum have shown strong antinociceptive potential. Our current study is designed to embark total phenolic content (TPC), antioxidant and antinociceptive potential of the methanolic extract of Teucrium stocksianum (METS). Method Phytochemical composition was determined by using standard methods. Free radical scavenging potential and TPC of METS were assessed by using 2, 2-diphenyl-1-picryl-hydrazyl (DPPH) and Folin-Ciocalteu Reagent (FCR) respectively. Antinociceptive potential was determined by acetic acid induced abdominal writhing, formalin induced paw licking and tail immersion tests. Different test dose 50, 100 and 150 mg/kg body weight of METS were administered intra peritonealy (i.p) to various groups of mice for the evaluation of analgesic potential. Results Phytochemical screening confirmed the presence of flavonoids, tannins, saponins, anthraquinone, steroid, phlobatannin, terpenoid, glycoside and reducing sugars. METS was found safe at a dose of 1000 mg/kg body weight. A concentration dependent free radical scavenging effect was observed with methanolic aerial parts extract of Teucrium stocksianum (MAPETS) and methanolic roots extracts of Teucrium stocksianum (MRETS). MAPETS and MRETS have shown highest antioxidant activity 91.72% and 86.19% respectively at 100 μg/ml. MAPETS was found more rich (115.32 mg of GAE/g of dry material) in TPC as compared to MAPETS (105.41 mg of GAE/g). METS demonstrated a dose dependent antinociceptive potential in different pain models, like in acetic acid, formalin and tail immersion showing 83.103%, 80.872% and 67.58% at a dose of 150 mg/kg, similar to acetylsalicylic acid (74.79%, 82.87%, 100 mg/kg) and TramadolR (74%, 30 mg/kg) respectively. Conclusion Strong antioxidant potential and high TPCs are residing in the methanolic extract of T. stocksianum. METS showed analgesic potential in all models of nociception implying that both peripheral and central pathways of analgesia are involved. This might be due to the presence of various classes of phytochemicals in the plant extract.
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Baptista-de-Souza D, Di Cesare Mannelli L, Zanardelli M, Micheli L, Nunes-de-Souza RL, Canto-de-Souza A, Ghelardini C. Serotonergic modulation in neuropathy induced by oxaliplatin: effect on the 5HT2C receptor. Eur J Pharmacol 2014; 735:141-9. [PMID: 24786153 DOI: 10.1016/j.ejphar.2014.04.028] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 04/16/2014] [Accepted: 04/17/2014] [Indexed: 01/23/2023]
Abstract
Fluoxetine has been shown to be effective in clinical and experimental studies of neuropathic pain. Besides to increase serotonin levels in the synaptic cleft, fluoxetine is able to block the serotonergic 5-HT2C receptor subtype, which in turn has been involved in the modulation of neuropathic pain. This study investigated the effect of repeated treatments with fluoxetine on the neuropathic nociceptive response induced by oxaliplatin and the effects of both treatments on 5-HT2C receptor mRNA expression and protein levels in the rat spinal cord (SC), rostral ventral medulla (RVM), midbrain periaqueductal gray (PAG) and amygdala (Amy). Nociception was assessed by paw-pressure, cold plate and Von Frey tests. Fluoxetine prevented mechanical hypersensitivity and pain threshold alterations induced by oxaliplatin but did not prevent the impairment in weight gain induced by this anticancer drug. Ex vivo analysis revealed that oxaliplatin increased the 5-HT2C receptor mRNA expression and protein levels in the SC and PAG. Similar effects were observed in fluoxetine-treated animals but only within the PAG. While oxaliplatin decreased the 5-HT2C mRNA expression levels in the Amy, fluoxetine increased their protein levels in this area. Fluoxetine impaired the oxaliplatin effects on the 5-HT2C receptor mRNA expression in the SC and Amy and protein levels in the SC. All treatments increased of 5-HT2C receptor mRNA expression and protein levels in the PAG. These results suggest that the effects of fluoxetine on neuropathic pain induced by oxaliplatin are associated with quantitative changes in the 5-HT2C receptors located within important areas of the nociceptive system.
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Affiliation(s)
- Daniela Baptista-de-Souza
- Psychobiology Group/Department of Psychology/CECH-UFSCar, São Carlos, SP 13565-905, Brazil; Joint Graduate Program in Physiological Sciences UFSCar/UNESP., São Carlos, SP 13565-905, Brazil; Department of Neuroscience, Psychology, Drug Research and Child Health - Neurofarba - Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
| | - Lorenzo Di Cesare Mannelli
- Department of Neuroscience, Psychology, Drug Research and Child Health - Neurofarba - Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy
| | - Matteo Zanardelli
- Department of Neuroscience, Psychology, Drug Research and Child Health - Neurofarba - Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy
| | - Laura Micheli
- Department of Neuroscience, Psychology, Drug Research and Child Health - Neurofarba - Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy
| | | | - Azair Canto-de-Souza
- Psychobiology Group/Department of Psychology/CECH-UFSCar, São Carlos, SP 13565-905, Brazil; Joint Graduate Program in Physiological Sciences UFSCar/UNESP., São Carlos, SP 13565-905, Brazil
| | - Carla Ghelardini
- Department of Neuroscience, Psychology, Drug Research and Child Health - Neurofarba - Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy
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Topical Antinociceptive Effect of Vanillosmopsis arborea Baker on Acute Corneal Pain in Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:708636. [PMID: 24660017 PMCID: PMC3934451 DOI: 10.1155/2014/708636] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 12/07/2013] [Accepted: 12/19/2013] [Indexed: 11/17/2022]
Abstract
This study aimed to assess the possible topical antinociceptive activity of Vanillosmopsis arborea Baker essential oil (EOVA) and to clarify the underlying mechanism, using the acute model of chemical (eye wiping) nociception in mice. EOVA (25 to 200 mg/kg; p.o. and topical) evidenced significant antinociception against chemogenic pain in the test model of formalin-induced neuroinflammatory pain. Local application of 5 M NaCl solution on the corneal surface of the eye produced a significant nociceptive behavior, characterized by eye wiping. The number of eye wipes was counted during the first 30 s. EOVA (25, 50, 100, and 200 mg/kg; p.o. and topical) significantly decreased the number of eye wipes. Naloxone, yohimbine, L-NAME, theophylline, glibenclamide, and ruthenium red had no effect on the antinociceptive effect of EOVA. However, ondansetron, p-chlorophenylalanine methyl ester (PCPA), capsazepine, prazosin, and atropine prevented the antinociception induced by EOVA. These results indicate the topical antinociceptive effect of EOVA and showed that 5-HT, α1, TRPV1, and central muscarinic receptors might be involved in the antinociceptive effect of EOVA in the acute corneal model of pain in mice.
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