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de Abreu MS, Giacomini ACVV, Demin KA, Galstyan DS, Zabegalov KN, Kolesnikova TO, Amstislavskaya TG, Strekalova T, Petersen EV, Kalueff AV. Unconventional anxiety pharmacology in zebrafish: Drugs beyond traditional anxiogenic and anxiolytic spectra. Pharmacol Biochem Behav 2021; 207:173205. [PMID: 33991579 DOI: 10.1016/j.pbb.2021.173205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 12/14/2022]
Abstract
Anxiety is the most prevalent brain disorder and a common cause of human disability. Animal models are critical for understanding anxiety pathogenesis and its pharmacotherapy. The zebrafish (Danio rerio) is increasingly utilized as a powerful model organism in anxiety research and anxiolytic drug screening. High similarity between human, rodent and zebrafish molecular targets implies shared signaling pathways involved in anxiety pathogenesis. However, mounting evidence shows that zebrafish behavior can be modulated by drugs beyond conventional anxiolytics or anxiogenics. Furthermore, these effects may differ from human and/or rodent responses, as such 'unconventional' drugs may affect zebrafish behavior despite having no such profiles (or exerting opposite effects) in humans or rodents. Here, we discuss the effects of several putative unconventional anxiotropic drugs (aspirin, lysergic acid diethylamide (LSD), nicotine, naloxone and naltrexone) and their potential mechanisms of action in zebrafish. Emphasizing the growing utility of zebrafish models in CNS drug discovery, such unconventional anxiety pharmacology may provide important, evolutionarily relevant insights into complex regulation of anxiety in biological systems. Albeit seemingly complicating direct translation from zebrafish into clinical phenotypes, this knowledge may instead foster the development of novel CNS drugs, eventually facilitating innovative treatment of patients based on novel 'unconventional' targets identified in fish models.
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Affiliation(s)
- Murilo S de Abreu
- Bioscience Institute, University of Passo Fundo, Passo Fundo, Brazil; Laboratory of Cell and Molecular Biology and Neurobiology, Moscow Institute of Physics and Technology, Moscow, Russia; The International Zebrafish Neuroscience Research Consortium (ZNRC), Slidell, LA, USA.
| | - Ana C V V Giacomini
- Bioscience Institute, University of Passo Fundo, Passo Fundo, Brazil; Postgraduate Program in Environmental Sciences, University of Passo Fundo, Passo Fundo, Brazil
| | - Konstantin A Demin
- Institute of Experimental Medicine, Almazov Medical Research Center, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia
| | - David S Galstyan
- Institute of Experimental Medicine, Almazov Medical Research Center, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Granov Scientific Research Center of Radiology and Surgical Technologies, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia
| | - Konstantin N Zabegalov
- Ural Federal University, Ekaterinburg, Russia; Neurobiology Program, Sirius University, Sochi, Russia
| | - Tatyana O Kolesnikova
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; School of Chemistry, Ural Federal University, Ekaterinburg, Russia; Neurobiology Program, Sirius University, Sochi, Russia
| | - Tamara G Amstislavskaya
- Scientific Research Institute of Neuroscience and Medicine, Novosibirsk, Russia; Novosibirsk State University, Novosibirsk, Russia
| | - Tatyana Strekalova
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands; Laboratory of Psychiatric Neurobiology, Institute of Molecular Medicine and Department of Normal Physiology, Sechenov 1st Moscow State Medical University, Moscow, Russia; Institute of General Pathology and Pathophysiology, Moscow, Russia; Department of Preventive Medicine, Maastricht Medical Center Annadal, Maastricht, Netherlands
| | - Elena V Petersen
- Laboratory of Cell and Molecular Biology and Neurobiology, Moscow Institute of Physics and Technology, Moscow, Russia
| | - Allan V Kalueff
- School of Pharmacy, Southwest University, Chongqing, China; School of Chemistry, Ural Federal University, Ekaterinburg, Russia; Neurobiology Program, Sirius University, Sochi, Russia.
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2
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Costa FV, Rosa LV, Quadros VA, de Abreu MS, Santos ARS, Sneddon LU, Kalueff AV, Rosemberg DB. The use of zebrafish as a non-traditional model organism in translational pain research: the knowns and the unknowns. Curr Neuropharmacol 2021; 20:476-493. [PMID: 33719974 DOI: 10.2174/1570159x19666210311104408] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 02/24/2021] [Accepted: 02/28/2021] [Indexed: 11/22/2022] Open
Abstract
The ability of the nervous system to detect a wide range of noxious stimuli is crucial to avoid life-threatening injury and to trigger protective behavioral and physiological responses. Pain represents a complex phenomenon, including nociception associated with cognitive and emotional processing. Animal experimental models have been developed to understand the mechanisms involved in pain response, as well as to discover novel pharmacological and non-pharmacological anti-pain therapies. Due to the genetic tractability, similar physiology, low cost, and rich behavioral repertoire, the zebrafish (Danio rerio) has been considered a powerful aquatic model for modeling pain responses. Here, we summarize the molecular machinery of zebrafish to recognize painful stimuli, as well as emphasize how zebrafish-based pain models have been successfully used to understand specific molecular, physiological, and behavioral changes following different algogens and/or noxious stimuli (e.g., acetic acid, formalin, histamine, Complete Freund's Adjuvant, cinnamaldehyde, allyl isothiocyanate, and fin clipping). We also discuss recent advances in zebrafish-based studies and outline the potential advantages and limitations of the existing models to examine the mechanisms underlying pain responses from an evolutionary and translational perspective. Finally, we outline how zebrafish models can represent emergent tools to explore pain behaviors and pain-related mood disorders, as well as to facilitate analgesic therapy screening in translational pain research.
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Affiliation(s)
- Fabiano V Costa
- Laboratory of Experimental Neuropsychobiology, Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria RS. Brazil
| | - Luiz V Rosa
- Laboratory of Experimental Neuropsychobiology, Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria RS. Brazil
| | - Vanessa A Quadros
- Laboratory of Experimental Neuropsychobiology, Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria RS. Brazil
| | - Murilo S de Abreu
- Bioscience Institute, University of Passo Fundo (UPF), Passo Fundo, RS. Brazil
| | - Adair R S Santos
- Laboratory of Neurobiology of Pain and Inflammation, Department of Physiological Sciences, Center of Biological Sciences, Federal University of Santa Catarina, Trindade, Florianópolis, SC. Brazil
| | - Lynne U Sneddon
- University of Gothenburg, Department of Biological & Environmental Sciences, Box 461, SE-405 30 Gothenburg. Sweden
| | - Allan V Kalueff
- School of Pharmacy, Southwest University, Chongqing, China; Ural Federal University, Ekaterinburg. Russian Federation
| | - Denis B Rosemberg
- Laboratory of Experimental Neuropsychobiology, Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria RS. Brazil
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3
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The stress - Reproductive axis in fish: The involvement of functional neuroanatomical systems in the brain. J Chem Neuroanat 2020; 112:101904. [PMID: 33278567 DOI: 10.1016/j.jchemneu.2020.101904] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 10/23/2020] [Accepted: 11/30/2020] [Indexed: 01/26/2023]
Abstract
The neuroendocrine-stress axis of nonmammalian species is evolutionarily conserved, which makes them useful to serve as important model systems for elucidating the function of the vertebrate stress response. The involvement of hypothalamo-pituitary-adrenal (HPA) axis hormones in regulation of stress and reproduction is well described in different vertebrates. However, the stress response is a complex process, which appears to be controlled by a number of neurochemicals in association with hypothalamo-pituitary-interrenal (HPI) axis or independent of HPI axis in fish. In recent years, the participation of neurohormones other than HPI axis in regulation of stress and reproduction is gaining more attention. This review mainly focuses on the involvement of functional neuroanatomical systems such as the catecholaminergic neurotransmitter dopamine (DA) and opioid peptides in regulation of the stress-reproductive axis in fish. Occurrences of DA and opioid peptides like β-endorphin, enkephalins, dynorphin, and endomorphins have been demonstrated in fish brain, and diverse roles such as pain modulation, social behaviour and reproduction are implicated for these hormones. Neuroanatomical studies using retrograde tracing, immunohistochemical staining and lesion methods have demonstrated that the neurons originating in the preoptic region and the nucleus lateralis tuberis directly innervate the pituitary gland and, therefore, the hypophysiotrophic role of these hormones. In addition, heightened synthetic and secretory activity of the opioidergic and the dopaminergic neurons in hypothalamic areas of the brain during stress exposure suggest potentially intricate relationship with the stress-reproductive axis in fish. Current evidence in early vertebrates like fish provides a novel insight into the underlying neuroendocrine mechanisms as additional pathways along the stress-reproductive axis that seem to be conserved during the course of evolution.
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Bu G, Cui L, Lv C, Lin D, Huang L, Li Z, Li J, Zeng X, Wang Y. Opioid Peptides and Their Receptors in Chickens: Structure, Functionality, and Tissue Distribution. Peptides 2020; 128:170307. [PMID: 32217145 DOI: 10.1016/j.peptides.2020.170307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 12/19/2022]
Abstract
Opioid peptides, derived from PENK, POMC, PDYN and PNOC precursors, together with their receptors (DOR, MOR, KOR and ORL1), constitute the opioid system and are suggested to participate in multiple physiological/pathological processes in vertebrates. However, the question whether an opioid system exists and functions in non-mammalian vertebrates including birds remains largely unknown. Here, we cloned genes encoding opioid system from the chicken brain and examined their functionality and tissue expression. As in mammals, 6 opioid peptides encoded by PENK (Met-enkephalin and Leu-enkephalin), POMC (β-endorphin), PDYN (dynorphin-A and dynorphin-B) and PNOC (nociceptin) precursors and four opioid receptors were found to be highly conserved in chickens. Using pGL3-CRE-luciferase and pGL4-SRE-luciferase reporter systems, we demonstrated that chicken opioid receptors (cDOR, cMOR, cKOR and cORL1) expressed in CHO cells, could be differentially activated by chicken opioid peptides, and resulted in the inhibition of cAMP/PKA and activation of MAPK/ERK signaling pathways. cDOR is potently activated by Met-enkephalin and Leu-enkephalin, and cKOR is potently activated by dynorphin-A, dynorphin-B and nociceptin, whereas cORL1 is specifically activated by nociceptin. Unlike cDOR, cKOR and cORL1, cMOR is moderately/weakly activated by enkephalins and other opioid peptides. These findings suggest the ligand-receptor pair in chicken opioid system is similar, but not identical to, that in mammals. Quantitative real-time PCR revealed that the opioid system is mainly expressed in chicken central nervous system including the hypothalamus. Collectively, our data will help to facilitate the better understanding of the conserved roles of opioid system across vertebrates.
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Affiliation(s)
- Guixian Bu
- College of Life Science, Sichuan Agricultural University, Ya'an, 625014, PR China; Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, PR China
| | - Lin Cui
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, PR China
| | - Can Lv
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, PR China
| | - Dongliang Lin
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, PR China
| | - Long Huang
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, PR China
| | - Zhengyang Li
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, PR China
| | - Juan Li
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, PR China
| | - Xianyin Zeng
- College of Life Science, Sichuan Agricultural University, Ya'an, 625014, PR China.
| | - Yajun Wang
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, PR China.
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Depienne C, Ciura S, Trouillard O, Bouteiller D, Leitão E, Nava C, Keren B, Marie Y, Guegan J, Forlani S, Brice A, Anheim M, Agid Y, Krack P, Damier P, Viallet F, Houeto JL, Durif F, Vidailhet M, Worbe Y, Roze E, Kabashi E, Hartmann A. Association of Rare Genetic Variants in Opioid Receptors with Tourette Syndrome. TREMOR AND OTHER HYPERKINETIC MOVEMENTS (NEW YORK, N.Y.) 2019; 9:tre-09-693. [PMID: 31824749 PMCID: PMC6878848 DOI: 10.7916/tohm.v0.693] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 10/15/2019] [Indexed: 01/07/2023]
Abstract
Background Genes involved in Tourette syndrome (TS) remain largely unknown. We aimed to identify genetic factors contributing to TS in a French cohort of 120 individuals using a combination of hypothesis-driven and exome-sequencing approaches. Methods We first sequenced exons of SLITRK1-6 and HDC in the TS cohort and subsequently sequenced the exome of 12 individuals harboring rare variants in these genes to find additional rare variants contributing to the disorder under the hypothesis of oligogenic inheritance. We further screened three candidate genes (OPRK1, PCDH10, and NTSR2) preferentially expressed in the basal ganglia, and three additional genes involved in neurotensin and opioid signaling (OPRM1, NTS, and NTSR1), and compared variant frequencies in TS patients and 788 matched control individuals. We also investigated the impact of altering the expression of Oprk1 in zebrafish. Results Thirteen ultrarare missense variants of SLITRK1-6 and HDC were identified in 12 patients. Exome sequencing in these patients revealed rare possibly deleterious variants in 3,041 genes, 54 of which were preferentially expressed in the basal ganglia. Comparison of variant frequencies altering selected candidate genes in TS and control individuals revealed an excess of potentially disrupting variants in OPRK1, encoding the opioid kappa receptor, in TS patients. Accordingly, we show that downregulation of the Oprk1 orthologue in zebrafish induces a hyperkinetic phenotype in early development. Discussion These results support a heterogeneous and complex genetic etiology of TS, possibly involving rare variants altering the opioid pathway in some individuals, which could represent a novel therapeutic target in this disorder.
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Affiliation(s)
- Christel Depienne
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR.,Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, 45122 Essen, DE
| | - Sorana Ciura
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Oriane Trouillard
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Delphine Bouteiller
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Elsa Leitão
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, 45122 Essen, DE
| | - Caroline Nava
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR.,Assistance Publique Hôpitaux de Paris (AP-HP), Hôpital Pitié-Salpêtrière, Département de Génétique, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Boris Keren
- Assistance Publique Hôpitaux de Paris (AP-HP), Hôpital Pitié-Salpêtrière, Département de Génétique, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Yannick Marie
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Justine Guegan
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Sylvie Forlani
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Alexis Brice
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Mathieu Anheim
- Service de neurologie, CHU de Strasbourg, Hôpital de Hautepierre, Avenue Molière, 67200 Strasbourg Strasbourg, FR
| | - Yves Agid
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Paul Krack
- Service de Neurologie, CHU de Grenoble, Avenue Maquis du Grésivaudan, 38700 La Tronche, FR.,Center for Movement Disorders, Inselspital, University of Bern, Freiburgstrasse 18, 3010 Bern, Switzerland
| | - Philippe Damier
- Service de Neurologie, CHU de Nantes, 5 Allée de l'Île Gloriette, 44093 Nantes, FR
| | - François Viallet
- Service de Neurologie, CRHU d'Aix-en-Provence, Avenue des Tamaris, 13100 Aix-en-Provence, FR
| | - Jean-Luc Houeto
- Service de Neurologie, CHU de Poitiers, 2 Rue de la Milétrie, 86021 Poitiers, FR
| | - Franck Durif
- Service de Neurologie, CHU de Clermont-Ferrand, CHU de Clermont-Ferrand, Hôpital Gabriel Montpied, 58 rue Montalembert, 63003 Clermont-Ferrand, FR
| | - Marie Vidailhet
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR.,Assistance Publique Hôpitaux de Paris (APHP), Hôpital Pitié-Salpêtrière, Département de Neurologie, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Yulia Worbe
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR.,Assistance Publique Hôpitaux de Paris (APHP), Hôpital Pitié-Salpêtrière, Département de Neurologie, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR.,AP-HP, Centre de Référence National Maladie Rare 'Syndrome Gilles de la Tourette', Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Emmanuel Roze
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR.,AP-HP, Centre de Référence National Maladie Rare 'Syndrome Gilles de la Tourette', Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Edor Kabashi
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
| | - Andreas Hartmann
- INSERM, U 1127, CNRS UMR 7225, Faculté de Médecine de Sorbonne Université, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR.,Assistance Publique Hôpitaux de Paris (APHP), Hôpital Pitié-Salpêtrière, Département de Neurologie, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR.,AP-HP, Centre de Référence National Maladie Rare 'Syndrome Gilles de la Tourette', Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75013 Paris, FR
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Costa FV, Canzian J, Stefanello FV, Kalueff AV, Rosemberg DB. Naloxone prolongs abdominal constriction writhing-like behavior in a zebrafish-based pain model. Neurosci Lett 2019; 708:134336. [PMID: 31220523 DOI: 10.1016/j.neulet.2019.134336] [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: 05/06/2019] [Revised: 06/07/2019] [Accepted: 06/16/2019] [Indexed: 11/25/2022]
Abstract
The ability to detect noxious stimuli is essential to survival. However, pathological pain is maladaptive and severely debilitating. Endogenous and exogenous opioids modulate pain responses via opioid receptors, reducing pain sensibility. Due to the high genetic and physiological similarities to rodents and humans, the zebrafish is a valuable tool to assess pain responses and the underlying mechanisms involved in nociception. Although morphine attenuates pain-like responses of zebrafish, there are no data showing if the antagonism of opioid receptors prolongs pain duration in the absence of an exogenous opioid. Here, we investigated whether a common opioid antagonist naloxone affects the abdominal constriction writhing-like response, recently characterized as a zebrafish-based pain behavior. Animals were injected intraperitoneally with acetic acid (5.0%), naloxone (1.25 mg/kg; 2.5 mg/kg; 5.0 mg/kg) or acetic acid with naloxone to investigate the changes in their body curvature for 1 h. Acetic acid elicited a robust pain-like response in zebrafish, as assessed by aberrant abdominal body curvature, while no effects were observed following PBS injection. Although naloxone alone did not alter the frequency and duration of this behavior, it dose-dependently prolonged acetic acid-induced abdominal curvature response. Besides reinforcing the use of the abdominal writhing-like phenotype as a behavioral endpoint to measure acute pain responses in zebrafish models, our novel data suggest a putative role of endogenous opioids in modulating the recovery from pain stimulation in zebrafish.
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Affiliation(s)
- Fabiano V Costa
- Laboratory of Experimental Neuropsychobiology, Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria, 1000 Roraima Avenue, Santa Maria, RS, 97105-900, Brazil; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS, 97105-900, Brazil.
| | - Julia Canzian
- Laboratory of Experimental Neuropsychobiology, Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria, 1000 Roraima Avenue, Santa Maria, RS, 97105-900, Brazil; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS, 97105-900, Brazil
| | - Flavia V Stefanello
- Laboratory of Experimental Neuropsychobiology, Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria, 1000 Roraima Avenue, Santa Maria, RS, 97105-900, Brazil
| | - Allan V Kalueff
- School of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China; Institute of Experimental Medicine, Almazov National Medical Research Center, St. Petersburg 197341, Russia; Ural Federal University, 19 Mira street, Ekaterinburg, 620002, Russia; The International Zebrafish Neuroscience Research Consortium (ZNRC), 309 Palmer Court, Slidell, LA 70458, USA
| | - Denis B Rosemberg
- Laboratory of Experimental Neuropsychobiology, Department of Biochemistry and Molecular Biology, Natural and Exact Sciences Center, Federal University of Santa Maria, 1000 Roraima Avenue, Santa Maria, RS, 97105-900, Brazil; Graduate Program in Biological Sciences: Toxicological Biochemistry, Federal University of Santa Maria. 1000 Roraima Avenue, Santa Maria, RS, 97105-900, Brazil; The International Zebrafish Neuroscience Research Consortium (ZNRC), 309 Palmer Court, Slidell, LA 70458, USA.
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7
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de Abreu MS, Giacomini AC, Echevarria DJ, Kalueff AV. Legal aspects of zebrafish neuropharmacology and neurotoxicology research. Regul Toxicol Pharmacol 2019; 101:65-70. [DOI: 10.1016/j.yrtph.2018.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 11/13/2018] [Accepted: 11/15/2018] [Indexed: 12/31/2022]
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8
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Bao W, Volgin AD, Alpyshov ET, Friend AJ, Strekalova TV, de Abreu MS, Collins C, Amstislavskaya TG, Demin KA, Kalueff AV. Opioid Neurobiology, Neurogenetics and Neuropharmacology in Zebrafish. Neuroscience 2019; 404:218-232. [PMID: 30710667 DOI: 10.1016/j.neuroscience.2019.01.045] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 01/22/2019] [Accepted: 01/23/2019] [Indexed: 01/28/2023]
Abstract
Despite the high prevalence of medicinal use and abuse of opioids, their neurobiology and mechanisms of action are not fully understood. Experimental (animal) models are critical for improving our understanding of opioid effects in vivo. As zebrafish (Danio rerio) are increasingly utilized as a powerful model organism in neuroscience research, mounting evidence suggests these fish as a useful tool to study opioid neurobiology. Here, we discuss the zebrafish opioid system with specific focus on opioid gene expression, existing genetic models, as well as its pharmacological and developmental regulation. As many human brain diseases involve pain and aberrant reward, we also summarize zebrafish models relevant to opioid regulation of pain and addiction, including evidence of functional interplay between the opioid system and central dopaminergic and other neurotransmitter mechanisms. Additionally, we critically evaluate the limitations of zebrafish models for translational opioid research and emphasize their developing utility for improving our understanding of evolutionarily conserved mechanisms of pain-related, addictive, affective and other behaviors, as well as for fostering opioid-related drug discovery.
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Affiliation(s)
- Wandong Bao
- School of Pharmacy and School of Life Sciences, Southwest University, Chongqing, China
| | - Andrey D Volgin
- Military Medical Academy, St. Petersburg, Russia; Institute of Experimental Medicine, Almazov National Medical Research Centre, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; Scientific Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia
| | - Erik T Alpyshov
- School of Pharmacy and School of Life Sciences, Southwest University, Chongqing, China
| | - Ashton J Friend
- Tulane University School of Science and Engineering, New Orleans, LA, USA; The International Zebrafish Neuroscience Research Consortium, New Orleans, LA, USA
| | - Tatyana V Strekalova
- Sechenov First Moscow State Medical University, Institute of Molecular Medicine, Laboratory of Psychiatric Neurobiology and Department of Normal Physiology, Moscow, Russia; Department of Neuroscience, Maastricht University, Maastricht, Netherlands; Institute of General Pathology and Pathophysiology, Moscow, Russia
| | - Murilo S de Abreu
- The International Zebrafish Neuroscience Research Consortium, New Orleans, LA, USA; Bioscience Institute, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Christopher Collins
- ZENEREI Research Center, Slidell, LA, USA; The International Zebrafish Neuroscience Research Consortium, New Orleans, LA, USA
| | - Tamara G Amstislavskaya
- Scientific Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia; The International Zebrafish Neuroscience Research Consortium, New Orleans, LA, USA
| | - Konstantin A Demin
- Institute of Experimental Medicine, Almazov National Medical Research Centre, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia
| | - Allan V Kalueff
- School of Pharmacy and School of Life Sciences, Southwest University, Chongqing, China; Institute of Experimental Medicine, Almazov National Medical Research Centre, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; Ural Federal University, Ekaterinburg, Russia; Granov Russian Research Center of Radiology and Surgical Technologies, Ministry of Healthcare of Russian Federation, Pesochny, Russia; Scientific Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia; ZENEREI Research Center, Slidell, LA, USA; The International Zebrafish Neuroscience Research Consortium, New Orleans, LA, USA.
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9
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Generation and Characterization of Antibodies against Opioid Receptors from Zebrafish. Int J Mol Sci 2018; 19:ijms19010014. [PMID: 29301275 PMCID: PMC5795966 DOI: 10.3390/ijms19010014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/04/2017] [Accepted: 12/08/2017] [Indexed: 02/07/2023] Open
Abstract
The opioid system is well conserved among species and plays a critical role in pain and addiction systems. The use of zebrafish as an experimental model to study development and genetics is extraordinary and has been proven to be relevant for the study of different diseases. The main drawback to its use for the analysis of different pathologies is the lack of protein tools. Antibodies that work in other models are not suitable for zebrafish due to the low degree of homology that exists among the opioid receptor protein sequences in different species. Here we report the successful generation and characterization of antibodies against the mu, delta 1 and delta 2 opioid receptors in zebrafish. The antibodies obtained, which are specific for each receptor due to the use of the C-terminus as antigens, work for Western blotting and immunohistochemistry. In addition, the antibodies against mu and delta 1 opioid receptors, but not those against delta 2, are able to immunoprecipitate the corresponding receptor from zebrafish lysates. The development of opioid receptor antibodies is an asset to the further study of the endogenous opioid system in zebrafish.
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10
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Kalueff AV, Kaluyeva A, Maillet EL. Anxiolytic-like effects of noribogaine in zebrafish. Behav Brain Res 2017; 330:63-67. [PMID: 28479267 DOI: 10.1016/j.bbr.2017.05.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 04/27/2017] [Accepted: 05/03/2017] [Indexed: 01/09/2023]
Abstract
Noribogaine is the main psychoactive metabolite of the hallucinogenic drug ibogaine, and is a particularly interesting compound potentially useful to treat dependence and various psychiatric disorders. Here, we report the effects of noribogaine on anxiety and locomotion in zebrafish (Danio rerio), a new promising model organism in neurobehavioral and psychopharmacological research. Adult zebrafish were subjected to the 5min novel tank test (NTT) following an acute, 20-min drug immersion in 1, 5 and 10mg/L noribogaine. Overall, noribogaine produced robust anxiolytic-like behavior in zebrafish (increasing the time spent and transitions to the top half compartment and reducing freezing bouts) without overt effects on fish locomotion. Taken together, these results indicate that noribogaine modulates the components of the acute stress response related to emotionality and anxiety behaviors, implicating this drug as a potentially useful non-sedative anxiolytic agent.
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Affiliation(s)
- Allan V Kalueff
- School of Pharmaceutical Sciences, Southwest University, Chongqing 400700, China; ZENEREI Research Center, 309 Palmer Court, Slidell, LA 70458, USA; The International Zebrafish Neuroscience Research Consortium (ZNRC), Slidell 70458, LA, USA; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg 199034, Russia; Ural Federal University, Yekaterinburg, 620020, Russia.
| | - Aleksandra Kaluyeva
- ZENEREI Research Center, 309 Palmer Court, Slidell, LA 70458, USA; The International Zebrafish Neuroscience Research Consortium (ZNRC), Slidell 70458, LA, USA
| | - Emeline L Maillet
- DemeRx, Inc., R&D Laboratory, University of Miami Life Science and Tech Park. Blg 1, 1951 NW 7th Ave, Suite 300, Miami, FL 33136, USA.
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11
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Role of morphine, miR-212/132 and mu opioid receptor in the regulation of Bdnf in zebrafish embryos. Biochim Biophys Acta Gen Subj 2016; 1860:1308-16. [DOI: 10.1016/j.bbagen.2016.03.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 01/29/2016] [Accepted: 03/01/2016] [Indexed: 11/18/2022]
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12
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Vardy E, Sassano MF, Rennekamp AJ, Kroeze WK, Mosier PD, Westkaemper RB, Stevens CW, Katritch V, Stevens RC, Peterson RT, Roth BL. Single Amino Acid Variation Underlies Species-Specific Sensitivity to Amphibian Skin-Derived Opioid-like Peptides. ACTA ACUST UNITED AC 2016; 22:764-75. [PMID: 26091169 DOI: 10.1016/j.chembiol.2015.05.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/14/2015] [Accepted: 05/01/2015] [Indexed: 01/08/2023]
Abstract
It has been suggested that the evolution of vertebrate opioid receptors (ORs) follow a vector of increased functionality. Here, we test this idea by comparing human and frog ORs. Interestingly, some of the most potent opioid peptides known have been isolated from amphibian skin secretions. Here we show that such peptides (dermorphin and deltorphin) are highly potent in the human receptors and inactive in frog ORs. The molecular basis for the insensitivity of the frog ORs to these peptides was studied using chimeras and molecular modeling. The insensitivity of the delta OR (DOR) to deltorphin was due to variation of a single amino acid, Trp7.35, which is a leucine in mammalian DORs. Notably, Trp7.35 is completely conserved in all known DOR sequences from lamprey, fish, and amphibians. The deltorphin-insensitive phenotype was verified in fish. Our results provide a molecular explanation for the species selectivity of skin-derived opioid peptides.
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Affiliation(s)
- Eyal Vardy
- Department of Pharmacology, UNC Chapel Hill Medical School, 4072 Genetic Medicine Building, 120 Mason Farm Road, Chapel Hill, NC 27514, USA
| | - Maria F Sassano
- Department of Pharmacology, UNC Chapel Hill Medical School, 4072 Genetic Medicine Building, 120 Mason Farm Road, Chapel Hill, NC 27514, USA
| | - Andrew J Rennekamp
- Cardiovascular Research Center and Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, 149 13(th) Street, Charlestown, MA 02129, USA; Broad Institute, 7 Cambridge Center, Cambridge, MA 02142, USA
| | - Wesley K Kroeze
- Department of Pharmacology, UNC Chapel Hill Medical School, 4072 Genetic Medicine Building, 120 Mason Farm Road, Chapel Hill, NC 27514, USA
| | - Philip D Mosier
- Department of Medicinal Chemistry, Virginia Commonwealth University School of Pharmacy, Richmond, VA 23298, USA
| | - Richard B Westkaemper
- Department of Medicinal Chemistry, Virginia Commonwealth University School of Pharmacy, Richmond, VA 23298, USA
| | - Craig W Stevens
- Department of Pharmacology & Physiology, Oklahoma State University Center for Health Sciences, 1111 West 17(th) Street, Tulsa, OK 74107, USA
| | - Vsevolod Katritch
- Department of Biological Sciences and Chemistry, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA
| | - Raymond C Stevens
- Department of Biological Sciences and Chemistry, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA
| | - Randall T Peterson
- Cardiovascular Research Center and Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, 149 13(th) Street, Charlestown, MA 02129, USA; Broad Institute, 7 Cambridge Center, Cambridge, MA 02142, USA
| | - Bryan L Roth
- Department of Pharmacology, UNC Chapel Hill Medical School, 4072 Genetic Medicine Building, 120 Mason Farm Road, Chapel Hill, NC 27514, USA.
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13
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Stevens CW. Bioinformatics and evolution of vertebrate nociceptin and opioid receptors. VITAMINS AND HORMONES 2015; 97:57-94. [PMID: 25677768 DOI: 10.1016/bs.vh.2014.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
G protein-coupled receptors (GPCRs) are ancestrally related membrane proteins on cells that mediate the pharmacological effect of most drugs and neurotransmitters. GPCRs are the largest group of membrane receptor proteins encoded in the human genome. One of the most famous types of GPCRs is the opioid receptors. Opioid family receptors consist of four closely related proteins expressed in all vertebrate brains and spinal cords examined to date. The three classical types of opioid receptors shown unequivocally to mediate analgesia in animal models and in humans are the mu- (MOR), delta- (DOR), and kappa-(KOR) opioid receptor proteins. The fourth and most recent member of the opioid receptor family discovered is the nociceptin or orphanin FQ receptor (ORL). The role of ORL and its ligands in producing analgesia is not as clear, with both analgesic and hyperalgesic effects reported. All four opioid family receptor genes were cloned from expressed mRNA in a number of vertebrate species, and there are enough sequences presently available to carry out bioinformatic analysis. This chapter presents the results of a comparative analysis of vertebrate opioid receptors using pharmacological studies, bioinformatics, and the latest data from human whole-genome studies. Results confirm our initial hypotheses that the four opioid receptor genes most likely arose by whole-genome duplication, that there is an evolutionary vector of opioid receptor type divergence in sequence and function, and that the hMOR gene shows evidence of positive selection or adaptive evolution in Homo sapiens.
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Affiliation(s)
- Craig W Stevens
- Department of Pharmacology and Physiology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, USA.
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14
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15
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Malafoglia V, Bryant B, Raffaeli W, Giordano A, Bellipanni G. The zebrafish as a model for nociception studies. J Cell Physiol 2013; 228:1956-66. [DOI: 10.1002/jcp.24379] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Accepted: 03/26/2013] [Indexed: 12/18/2022]
Affiliation(s)
| | - Bruce Bryant
- Monell Chemical Senses Center; Philadelphia, Pennsylvania
| | - William Raffaeli
- Institute for Research on Pain; ISAL-Foundation; Torre Pedrera (RN); Italy
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16
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Rodríguez RE. Morphine and microRNA Activity: Is There a Relation with Addiction? Front Genet 2012; 3:223. [PMID: 23162566 PMCID: PMC3494017 DOI: 10.3389/fgene.2012.00223] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 10/06/2012] [Indexed: 12/19/2022] Open
Abstract
When we talk about drug addiction, we are really dealing with an extremely complex system in which there still remain many unknowns and where many empty spaces or missing links are still present. Recent studies have identified changes in the expression profiles of several specific miRNAs which affect the interactions between these molecules and their targets in various illnesses, including addiction, and which may serve as valuable targets for more efficient therapies. In this review, we summarize results which clearly demonstrate that several morphine-related miRNAs have roles in the mechanisms that define addiction. In this regard, morphine has been shown to have an important role in the regulation of different miRNAs, such as miR-let-7 [which works as a mediator of the movement of the mu opioid receptor (MOR) mRNA into P-bodies, leading to translational repression], miR-23b (involved in linking MOR expression and morphine treatment at the post-transcriptional level), and miR-190 (a key post-transcriptional repressor of neurogenic differentiation, NeuroD). Fentanyl increases NeuroD levels by reducing the amount of miR-190, but morphine does not affect the levels of NeuroD. We also discuss the relationship between morphine, miRNAs, and the immune system, based on the discovery that morphine treatment of monocytes led to a decrease in several anti-HIV miRNAs (mir-28, 125b, 150, and 382). This review is centered on miR-133b and its possible involvement in addiction through the effects of morphine. We establish the importance of miR-133b as a regulatory factor by summarizing its activity in different pathological processes, especially cancer. Using the zebrafish as a research model, we discuss the relationship between mir-133b, the dopaminergic system, and morphine, considering: (1) that morphine modulates the expression of miR-133b and of its target transcript Pitx3, (2) the role of the zebrafish mu opioid receptor (zfMOR) in morphine-induced regulation of miR-133b, which depends on ERK1/2, (3) that morphine regulates miR-133b in hippocampal neurons, and (4) the role of delta opioid receptors in morphine-induced regulation of miR-133b. We conclude that the control of miR-133b levels may be a mechanism for the development of addiction to morphine, or other drugs of abuse that increase dopaminergic levels in the extracellular space. These results show that miR-133b is a possible new target for the design of new treatments against addictive disorders.
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Affiliation(s)
- Raquel E Rodríguez
- Department of Biochemistry and Molecular Biology, Institute of Neuroscience, University of Salamanca Salamanca, Spain
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17
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Kumar S, Rai U. Dynorphin regulates the phagocytic activity of splenic phagocytes in wall lizards: involvement of a κ-opioid receptor-coupled adenylate-cyclase-cAMP-PKA pathway. ACTA ACUST UNITED AC 2012; 214:4217-22. [PMID: 22116765 DOI: 10.1242/jeb.062935] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This in vitro study of the wall lizard Hemidactylus flaviviridis demonstrates the role of the opioid peptide dynorphin A((1-17)) [dyn A((1-17))] in the regulation of the phagocytic activity of splenic phagocytes. Dyn A((1-17)) in a concentration-dependent manner inhibited the phagocytic activity, and the maximum inhibition was recorded at a concentration of 10(-9) mol l(-1). To explore the receptor-mediated effect of dyn A((1-17)), cells were treated simultaneously with the non-selective opioid receptor blocker naltrexone and dyn A((1-17)). Naltrexone completely blocked the inhibitory effect of dyn A((1-17)) on phagocytosis. Moreover, the involvement of selective opioid receptors was investigated using selective opioid receptor antagonists. CTAP and naltrindole, selective μ- and δ-opioid receptor blockers, respectively, failed to block the inhibitory effect of dyn A((1-17)) on phagocytosis. However, the selective κ-opioid receptor blocker NorBNI completely antagonized the inhibitory effect of dyn A((1-17)). Regarding the κ-opioid receptor-coupled downstream signaling cascade, the adenylate cyclase (AC) inhibitor SQ 22536 and protein kinase A (PKA) inhibitor H-89 decreased the inhibitory effect of dyn A((1-17)) on phagocytosis. Furthermore, treatment with dyn A((1-17)) caused an increase in intracellular cAMP content in splenic phagocytes. Thus, it can be concluded that, in H. flaviviridis, dyn A((1-17)) negatively regulates the phagocytic activity of splenic phagocytes by acting through κ-opioid receptors that are coupled with the AC-cAMP-PKA signal transduction mechanism.
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Affiliation(s)
- Sunil Kumar
- Department of Zoology, University of Delhi, Delhi, India
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18
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Zebrafish: a model for the study of addiction genetics. Hum Genet 2011; 131:977-1008. [PMID: 22207143 DOI: 10.1007/s00439-011-1128-0] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Accepted: 12/11/2011] [Indexed: 12/20/2022]
Abstract
Drug abuse and dependence are multifaceted disorders with complex genetic underpinnings. Identifying specific genetic correlates is challenging and may be more readily accomplished by defining endophenotypes specific for addictive disorders. Symptoms and syndromes, including acute drug response, consumption, preference, and withdrawal, are potential endophenotypes characterizing addiction that have been investigated using model organisms. We present a review of major genes involved in serotonergic, dopaminergic, GABAergic, and adrenoreceptor signaling that are considered to be directly involved in nicotine, opioid, cannabinoid, and ethanol use and dependence. The zebrafish genome encodes likely homologs of the vast majority of these loci. We also review the known expression patterns of these genes in zebrafish. The information presented in this review provides support for the use of zebrafish as a viable model for studying genetic factors related to drug addiction. Expansion of investigations into drug response using model organisms holds the potential to advance our understanding of drug response and addiction in humans.
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19
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Verburg-van Kemenade BML, Ribeiro CMS, Chadzinska M. Neuroendocrine-immune interaction in fish: differential regulation of phagocyte activity by neuroendocrine factors. Gen Comp Endocrinol 2011; 172:31-8. [PMID: 21262228 DOI: 10.1016/j.ygcen.2011.01.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 01/07/2011] [Accepted: 01/10/2011] [Indexed: 12/31/2022]
Abstract
Coping with physical, chemical and biological disturbances depends on an extensive repertoire of physiological, endocrinological and immunological responses. Fish provide intriguing models to study bi-directional interaction between the neuroendocrine and the immune systems. Macrophages and granulocytes are the main actors in the first and rapid innate immune response. They are resident in different organs and are moreover rapidly recruited and activated upon infection. They act in response to recognition of pathogen-associated molecular patterns (PAMPs) via a repertoire of surface and intracellular receptors by inducing a plethora of defense reactions aiming to eradicate the pathogen. Subsequent production of inflammatory mediators stimulates other leukocytes required to develop an adaptive and specific antibody response. The type of phagocyte reaction will therefore depend on their differentiation state, specific receptor repertoire and their specific location. Apart from these pathogen induced responses, immune reactivity may be modulated by neuroendocrine factors. Over the last years we extensively studied changes in carp stress axis activity and the effect of its end-products on the immune system in an acute stress paradigm. We focus on specific neuroendocrine receptors on leukocytes and their effect on crucial phagocyte activities. We performed identification and functional analyses of different glucocorticoid, opioid and adrenergic receptors on carp phagocytes. Results show that their ligands of neuroendocrine origin may have substantial impact on specific phagocyte functions in a differential way. Inflammatory and microbicidal responses fight pathogens but may be detrimental to the host tissue. Neuroendocrine modulation may regulate inflammation to reach an optimum defense while preventing excessive host cell damage.
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Affiliation(s)
- B M L Verburg-van Kemenade
- Cell Biology & Immunology Group, Wageningen University, Marijkeweg 40, P.O. Box 338, 6700 AH, Wageningen, The Netherlands.
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20
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Kumar S, Ghorai SM, Rai U. β-Endorphin inhibits phagocytic activity of lizard splenic phagocytes through μ receptor-coupled adenylate cyclase-protein kinase A signaling pathway. Gen Comp Endocrinol 2011; 171:301-8. [PMID: 21352825 DOI: 10.1016/j.ygcen.2011.02.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2010] [Revised: 02/05/2011] [Accepted: 02/17/2011] [Indexed: 11/21/2022]
Abstract
The receptor-coupled intracellular signaling mechanism of endogenous opioid peptide β-endorphin (β-end) is explored for the first time in ectothermic vertebrates using wall lizard as a model. β-End inhibited the percentage phagocytosis and phagocytic index of lizard splenic phagocytes in a dose-dependent manner. The inhibitory effect of β-end on phagocytosis was completely antagonized by non-selective opioid receptor antagonist naltrexone and also by selective μ-receptor antagonist CTAP. However, selective antagonists for other opioid receptors like NTI for δ-receptor and NorBNI for κ-receptor did not alter the effect of β-end on phagocytosis. This suggests that β-end mediated its inhibitory effect on phagocytic activity of splenic phagocytes exclusively through μ opioid receptors. The μ opioid receptor-coupled downstream signaling cascade was subsequently explored using inhibitors of adenylate cyclase (SQ 22536) and protein kinase A (H-89). Both SQ 22536 and H-89 abolished the inhibitory effect of β-end on phagocytosis in a concentration-related manner. Implication of cAMP as second messenger was corroborated by cAMP assay where an increase in intracellular cAMP level was observed in response to β-end treatment. It can be concluded that β-end downregulated the phagocytic activity of lizard splenic phagocytes through μ opioid receptor-coupled adenylate cyclase-cAMP-protein kinase A pathway.
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Affiliation(s)
- Sunil Kumar
- Department of Zoology, University of Delhi, Delhi 110 007, India
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21
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Sanchez-Simon FM, Zhang XX, Loh HH, Law PY, Rodriguez RE. Morphine regulates dopaminergic neuron differentiation via miR-133b. Mol Pharmacol 2010; 78:935-42. [PMID: 20716624 DOI: 10.1124/mol.110.066837] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Morphine is one of the analgesics used most to treat chronic pain, although its long-term administration produces tolerance and dependence through neuronal plasticity. The ability of morphine to regulate neuron differentiation in vivo has been reported. However, the detailed mechanisms have not yet been elucidated because of the inability to separate maternal influences from embryonic events. Using zebrafish embryos as the model, we demonstrate that morphine decreases miR-133b expression, hence increasing the expression of its target, Pitx3, a transcription factor that activates tyrosine hydroxylase and dopamine transporter. Using a specific morpholino to knock down the zebrafish μ-opioid receptor (zfMOR) in the embryos and selective mitogen-activated protein kinase inhibitors, we demonstrate that the morphine-induced miR-133b decrease in zebrafish embryos is mediated by zfMOR activation of extracellular signal-regulated kinase 1/2. A parallel morphine-induced down-regulation of miR-133b was observed in the immature but not in mature rat hippocampal neurons. Our results indicate for the first time that zebrafish embryos express a functional μ-opioid receptor and that zebrafish serves as an excellent model to investigate the roles of microRNA in neuronal development affected by long-term morphine exposure.
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Affiliation(s)
- Fatima Macho Sanchez-Simon
- Department of Biochemistry and Molecular Biology, Institute of Neuroscience, University of Salamanca, Salamanca, Spain
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22
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Sanchez-Simon FM, Arenzana FJ, Rodriguez RE. In vivo effects of morphine on neuronal fate and opioid receptor expression in zebrafish embryos. Eur J Neurosci 2010; 32:550-9. [DOI: 10.1111/j.1460-9568.2010.07317.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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23
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Singh R, Rai U. Kappa-opioid receptor-mediated modulation of innate immune response by dynorphin in teleost Channa punctatus. Peptides 2010; 31:973-8. [PMID: 20132853 DOI: 10.1016/j.peptides.2010.01.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Revised: 01/25/2010] [Accepted: 01/25/2010] [Indexed: 11/20/2022]
Abstract
The immunomodulatory role of endogenous opioid peptides released during stress has been extensively studied in mammals, but least explored in lower vertebrates. The present in vitro study for the first time reports the specific opioid receptor-mediated immunomodulatory role of dynorphin-A((1-17)) in ectotherms. Dynorphin-A((1-17)) had pleiotropic effects on phagocyte functions, stimulatory on phagocytosis and superoxide production while inhibitory on the nitrite release. However, the effect of dynorphin-A((1-17)), whether stimulatory or inhibitory, markedly declined at high (10(-5)M) concentration. Dynorphin-A((1-17)) seems to mediate its action through opioid receptors since non-selective opioid receptor antagonist, naltrexone, completely blocked the effect of dynorphin-A((1-17)) on phagocytosis, superoxide production and nitrite release. Moreover, among specific opioid receptors antagonists, only selective kappa (kappa)-opioid receptor antagonist norbinaltorphimine was capable to antagonize the pleiotropic effects on phagocyte functions. The present study provides the direct evidence of immunomodulatory role of dynorphin-A((1-17)) via kappa-opioid receptor in freshwater teleost Channa punctatus.
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Affiliation(s)
- Rajeev Singh
- Department of Zoology, University of Delhi, Chattra Marg, North Campus, Delhi 110007, India
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24
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Marron Fdez de Velasco E, Law PY, Rodríguez RE. Mu opioid receptor from the zebrafish exhibits functional characteristics as those of mammalian mu opioid receptor. Zebrafish 2009; 6:259-68. [PMID: 19761379 DOI: 10.1089/zeb.2009.0594] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The functional characterization of the mu opioid receptor from the zebrafish (zfMOR) is reported here. After transfection in HEK-293 cell line, using both peptidergic and nonpeptidergic opioid ligands in the competition and saturation-binding experiments, in addition to the functional assays of (35)S-GTPgammaS-binding assays and intracellular 3'-5'-cyclic adenosine monophosphate (cAMP) level determinations, we demonstrate that zfMOR exhibits a pharmacological profile similar to that of the mammalian MOR. Besides, the internalization process of zfMOR after opiate agonist treatment (morphine, DAMGO, etorphine) resembles the pattern observed for its mammalian counterpart. These similarities suggest that the zebrafish is a good model for the study of the opioid effects in development.
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Affiliation(s)
- Ezequiel Marron Fdez de Velasco
- Department of Biochemistry and Molecular Biology, Institute of Neurosciences of Castilla y León, University of Salamanca, Salamanca, Spain
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25
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Singh R, Rai U. Delta opioid receptor-mediated immunoregulatory role of methionine-enkephalin in freshwater teleost Channa punctatus (Bloch.). Peptides 2009; 30:1158-64. [PMID: 19463750 DOI: 10.1016/j.peptides.2009.02.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2008] [Revised: 02/26/2009] [Accepted: 02/26/2009] [Indexed: 11/23/2022]
Abstract
The immunoregulatory role of methionine-enkephalin (Met-enk) is well studied in mammals, but has not been explored in ectotherms despite the fact that this peptide is highly conserved in vertebrates. The present study demonstrates the diverse effects of Met-enk depending on its concentration and specific function of splenic phagocytes in the freshwater fish Channa punctatus. Although Met-enk increased both phagocytic as well as respiratory burst activity, the concentration-related response was opposite to each other. It had the maximum stimulatory effect on phagocytosis at 10(-9)M, while the same concentration was least effective in increasing superoxide production. Similarly, Met-enk at concentrations lower or higher than 10(-9)M was either ineffective or less effective in case of phagocytosis, while highly effective in stimulating superoxide production. On the other hand, concentration-independent inhibitory effect of Met-enk was observed in case of nitrite production. Nonetheless, Met-enk regulated all the functions of phagocyte through opioid receptors since non-specific opioid receptor antagonist naltrexone completely blocked the effect of Met-enk on phagocytosis, superoxide and nitrite production by splenic phagocytes of C. punctatus. Among selective opioid receptor antagonists, delta-opioid receptor antagonist naltrindole completely antagonized the effect of Met-enk on phagocytosis, superoxide and nitrite production, while mu- and kappa-opioid receptor antagonist, CTAP and norbinaltorphimine, respectively, were ineffective in influencing any of the functions. This suggests that Met-enk modulates splenic phagocyte functions in the fish C. punctatus via delta-opioid receptor. This is further substantiated by using highly selective delta-opioid receptor agonist, SNC80.
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Affiliation(s)
- Rajeev Singh
- Department of Zoology, University of Delhi, Delhi, India
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Cloning of opioid receptors in common carp (Cyprinus carpio L.) and their involvement in regulation of stress and immune response. Brain Behav Immun 2009; 23:257-66. [PMID: 18977430 DOI: 10.1016/j.bbi.2008.10.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Revised: 10/09/2008] [Accepted: 10/09/2008] [Indexed: 11/22/2022] Open
Abstract
In mammals opiate alkaloids and endogenous opioid peptides exert their physiological and pharmacological actions through opioid receptors (MOR, DOR and KOR) expressed not only on neuroendocrine cells but also on leukocytes. Therefore, opioids can modulate the immune response. We cloned and sequenced all three classical opioid receptors (MOR, DOR and KOR) in common carp, and studied changes in their expression during stress and immune responses. Messenger RNA of opioid receptors was constitutively expressed in brain areas, specially in the preoptic nucleus NPO (homologous to mammalian hypothalamus). After exposure to prolonged restraint stress, mRNA levels of MOR and DOR decreased in the NPO and in the head kidney. Increased expression of all studied opioid receptors was observed in the pituitary pars distalis (containing ACTH-producing cells). In immune organs, constitutive but lower expression of opioid receptor genes was observed. During in vivo zymosan-induced peritonitis or after in vitro LPS-induced stimulation, when pro-inflammatory functions are activated, expression of the OR genes in leukocytes was concomitantly up-regulated. Additionally, specific agonists of opioid receptors especially reduced leukocyte migratory properties, manifested by reduced chemotaxis and down-regulated expression of chemokine receptors. Our data indicate an evolutionary conserved role for the opioid system in maintaining a dynamic equilibrium while coping with stress and/or infection.
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Abstract
The proteins that mediate the analgesic and other effects of opioid drugs and endogenous opioid peptides are known as opioid receptors. Opioid receptors consist of a family of four closely-related proteins belonging to the large superfamily of G-protein coupled receptors. The three types of opioid receptors shown unequivocally to mediate analgesia in animal models are the mu (MOR), delta (DOR), and kappa (KOR) opioid receptor proteins. The role of the fourth member of the opioid receptor family, the nociceptin or orphanin FQ receptor (ORL), is not as clear as hyperalgesia, analgesia, and no effect was reported after administration of ORL agonists. There are now cDNA sequences for all four types of opioid receptors that are expressed in the brain of six species from three different classes of vertebrates. This review presents a comparative analysis of vertebrate opioid receptors using bioinformatics and data from recent human genome studies. Results indicate that opioid receptors arose by gene duplication, that there is a vector of opioid receptor divergence, and that MOR shows evidence of rapid evolution.
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Affiliation(s)
- Craig W Stevens
- Department of Pharmacology and Physiology, Oklahoma State University-Center for Health Sciences, Tulsa, OK, USA.
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Brasel CM, Sawyer GW, Stevens CW. A pharmacological comparison of the cloned frog and human mu opioid receptors reveals differences in opioid affinity and function. Eur J Pharmacol 2008; 599:36-43. [PMID: 18930720 DOI: 10.1016/j.ejphar.2008.09.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2008] [Revised: 09/23/2008] [Accepted: 09/29/2008] [Indexed: 10/21/2022]
Abstract
This study presents a direct comparison of the ligand binding and signaling profiles of a mammalian and non-mammalian mu opioid receptor. Opioid ligand binding and agonist potencies were determined for an amphibian (Rana pipiens) mu opioid receptor (rpMOR) and the human mu opioid receptor (hMOR) in transfected, intact Chinese hamster ovary (CHO) cells. Identical conditions were employed such that statistically meaningful differences between the two receptors could be determined. Identifying these differences is an important first step in understanding how evolutionary changes affect ligand binding and signaling in vertebrate opioid receptors. As expected, the rank of opioid ligand affinity for rpMOR and hMOR was consistent with the ligands' previously characterized type-selectivity. However, most of the opioid ligands tested had significant differences in affinity for rpMOR and hMOR. For example, the mu-selective agonist, DAMGO ([d-Ala(2), N-Me-Phe(4), Gly(5)-ol]-enkephalin), had a 10.9-fold greater affinity (K(i)) for hMOR (K(i)=268 nM) than rpMOR (K(i)=2914 nM). In addition, differences in signaling between these receptors were found by measuring inhibition of cAMP accumulation by morphine or DAMGO. DAMGO was significantly more potent (13.6-fold) in CHO cells expressing hMOR versus those expressing rpMOR. In addition, a significantly greater maximal inhibition was elicited by both opioid agonists in cells expressing hMOR. In summary, this study supports an ongoing effort to better understand how vertebrate evolution has shaped opioid receptor properties and function.
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Affiliation(s)
- Chris M Brasel
- Dept. of Pharmacology and Physiology, OSU-Center for Health Sciences, Tulsa, OK 74107-1898, USA
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Singh R, Rai U. beta-Endorphin regulates diverse functions of splenic phagocytes through different opioid receptors in freshwater fish Channa punctatus (Bloch): an in vitro study. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2008; 32:330-8. [PMID: 17651799 DOI: 10.1016/j.dci.2007.06.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2007] [Revised: 05/28/2007] [Accepted: 06/17/2007] [Indexed: 05/16/2023]
Abstract
In this in vitro study, the role of beta-endorphin in the control of phagocytic and cytotoxic activities of fish splenic phagocytes was investigated. Further, the involvement of specific opioid receptor was explored. beta-Endorphin stimulated phagocytosis, whereas inhibited nitric oxide production as assessed by nitrite release. However, it had concentration-related biphasic effects on superoxide production, stimulatory at low and inhibitory at high concentration. Naltrexone, non-selective opioid receptor antagonist, antagonized the effect of beta-endorphin on phagocyte functions. Moreover, CTAP, selective mu-receptor antagonist, completely blocked the effect of beta-endorphin on phagocytosis and nitrite release. With regard to superoxide production, CTAP blocked the stimulatory effect of beta-endorphin at low concentration, while the inhibitory effect at high concentration was completely antagonized by selective delta-receptor antagonist, NTI. In conclusion, beta-endorphin acting via mu-receptor stimulated phagocytosis and inhibited nitric oxide production, while its biphasic effect on superoxide production seems to be mediated by mu- and delta-receptors.
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Affiliation(s)
- Rajeev Singh
- Department of Zoology, University of Delhi, Delhi 110 007, India
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Gonzalez-Nuñez V, Toth G, Rodríguez RE. Endogenous heptapeptide Met-enkephalin-Gly-Tyr binds differentially to duplicate delta opioid receptors from zebrafish. Peptides 2007; 28:2340-7. [PMID: 18022288 DOI: 10.1016/j.peptides.2007.10.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2007] [Revised: 10/04/2007] [Accepted: 10/04/2007] [Indexed: 11/28/2022]
Abstract
Met-enkephalin-Gly-Tyr (MEGY) is an endogenous peptide that binds to opioid sites in zebrafish and in rat brain homogenates. The aim of this work is to characterize the binding profile of this opioid ligand on two duplicate delta receptors from zebrafish, ZFOR1 and ZFOR4. Our results show that, while ZFOR1 presents one single binding site for [(3)H]-MEGY (K(D)=4.0+/-0.4 nM), the experimental data from ZFOR4 fit better to the two-site binding model (K(D1)=0.8+/-0.2 nM and K(D2)=30.2+/-10.2 nM). Two other MEGY synthetic analogues, (D-Ala(2))-MEGY and (D-Ala(2), Val(5))-MEGY were also prepared and tested, together with the original peptide MEGY and other opioid ligands, in competition binding assays. While these peptides presented K(i) values on the nanomolar range when using [(3)H]-MEGY as radioligand, these parameters were two orders higher in competition binding assays with the antagonist [(3)H]-diprenorphine. Functional [(35)S]GTPgammaS stimulation analysis has revealed that these two receptors can be activated by several opioid agonists. Our results prove that although the MEGY peptide acts as an agonist on ZFOR1 and ZFOR4, there are subtle pharmacological differences between these two delta opioid receptors from zebrafish.
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Affiliation(s)
- Veronica Gonzalez-Nuñez
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Salamanca, Spain
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31
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Abstract
This paper is the 29th consecutive installment of the annual review of research concerning the endogenous opioid system, now spanning 30 years of research. It summarizes papers published during 2006 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurological disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); and immunological responses (Section 17).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, CUNY, 65-30 Kissena Blvd., Flushing, NY 11367, United States.
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Developmental expression and distribution of opioid receptors in zebrafish. Neuroscience 2007; 151:129-37. [PMID: 18082336 DOI: 10.1016/j.neuroscience.2007.09.086] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Revised: 09/24/2007] [Accepted: 10/27/2007] [Indexed: 11/22/2022]
Abstract
Zebrafish is a novel experimental model that has been used in developmental studies as well as in the study of pathological processes involved in human diseases. It has been demonstrated that the endogenous opioid system is involved in developmental mechanisms. We have studied the relationship between the different embryonic stages and opioid receptor expression for the four known opioid receptors in zebrafish (mu, delta 1, delta 2 and kappa). The mu opioid receptor is detected at higher levels than the other opioid receptors before the midblastula transition and during the segmentation period. The delta duplicate 2 exhibits only one peak of expression at 21 h postfertilization (hpf), when the motor nervous system is forming. The kappa receptor is expressed at very low levels. In situ hybridization studies at 24 hpf show that the opioid receptors are widely distributed in zebrafish CNS and at 48 hpf their localization is detected in more defined structures. Our results support specific implications of the opioid receptors in developmental processes such as morphogenesis of the CNS, neurogenesis, neuroprotection and development of neuromuscular and digestive system. Pain-related alterations can be a consequence of changes in the endogenous opioid system during development, hence we provide important information that might help to solve pain-related pathological situations.
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Gonzalez-Nuñez V, Marrón Fernández de Velasco E, Arsequell G, Valencia G, Rodríguez RE. Identification of dynorphin a from zebrafish: a comparative study with mammalian dynorphin A. Neuroscience 2006; 144:675-84. [PMID: 17069980 DOI: 10.1016/j.neuroscience.2006.09.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2006] [Revised: 09/05/2006] [Accepted: 09/17/2006] [Indexed: 11/24/2022]
Abstract
We report the cloning and molecular characterization of the zfPDYN. The complete open reading frame for this propeptide is comprised in two exons that are localized on chromosome 23. zfPDYN cDNA codes for a polypeptide of 252 amino acids that contains the consensus sequences for four opioid peptides: an Ile-enkephalin, the neo-endorphins, dynorphin A and dynorphin B. Upon comparison between zebrafish (zfDYN A) and mammalian dynorphin A (mDYN A) it has been stated that these two peptides only differ in two amino acids: the Leu(5) is replaced by Met(5) and the Lys(13) by Arg(13). Taking into consideration that mDYN A is able to bind to the three mammalian opioid receptors, we have compared the pharmacological profile of zfDYN A and mDYN A on the zebrafish opioid receptors. By means of radioligand binding techniques, we have established that these two dynorphins bind and activate all of the cloned opioid receptors from zebrafish (delta-, mu- and kappa-like), although with different affinities. zfDYN A and mDYN A displace [(3)H]-diprenorphine binding with K(i) values on the nanomolar range, showing greater affinity for zebrafish opioid receptor (ZFOR) 3 (kappa) receptor. ZFOR1 (delta) and ZFOR4 (delta) present higher affinity for zfDYN A than for mDYN A, while the opposing behavior is observed in ZFOR2 (mu). Functional [(35)S]guanosine 5'-[gamma-thio]triphosphate (GTPgammaS) stimulation experiments indicate that these two peptides fully activate the zebrafish opioid receptors, although the mean effective dose (EC(50)) values obtained for ZFOR2 and ZFOR3 receptors are lower than those seen for ZFOR1 and ZFOR4. A comparative study indicates that mammalian and zebrafish opioid receptors might bind their corresponding dynorphin A in a similar fashion, hence suggesting an important role of the opioid system through the vertebrate evolution.
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Affiliation(s)
- V Gonzalez-Nuñez
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Salamanca, Avda Alfonso X El Sabio, s/n 37007 Salamanca, Spain
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