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Marengo L, Barey A, Salguero A, Fabio MC, Cendán CM, Morón-Henche I, D'Addario C, Pautassi RM. Neurobehavioral alterations induced by third-trimester gestation-equivalent ethanol exposure are inhibited by folate administration. Dev Psychobiol 2023; 65:e22426. [PMID: 37860900 DOI: 10.1002/dev.22426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 08/13/2023] [Accepted: 09/04/2023] [Indexed: 10/21/2023]
Abstract
Prenatal ethanol exposure (PEE) causes several neurobehavioral impairments in the fetus. Postnatal days (PDs) 4-9 in rodents are considered equivalent to the third trimester of gestation in humans. This period is characterized by high rates of synaptogenesis and myelination and the maturation of key structures and transmitter systems. Nutritional supplements, such as folate, have gained attention as putative treatments to mitigate detrimental effects of PEE. Folate is crucial for DNA synthesis and amino acid metabolism and heightens antioxidant defenses. The present study examined neurobehavioral effects of the concurrent administration of folate (20 mg/kg/day) and ethanol (5 g/kg/day) during PDs 4-9 in male and female Wistar rats. During PDs 16-18, the rat pups were tested for anxiety-like and exploratory activity in the light-dark box (LDB), open field (OF), and concentric square field (CSF) tests. After weaning, they were tested for sucrose preference and ethanol intake. Neonatal ethanol exposure reduced body weight in infancy but did not enhance ethanol self-administration or significantly affect performance in the OF or LDB. Neonatal ethanol exposure also reduced sucrose intake in the preference test and increased shelter-seeking in the CSF, and folate significantly inhibited these effects. The present findings suggest that folate, a treatment that is devoid of serious side effects, can ameliorate some neurobehavioral effects of PEE.
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Affiliation(s)
- Leonardo Marengo
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Agostina Barey
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Agustín Salguero
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - María C Fabio
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET, Universidad Nacional de Córdoba, Córdoba, Argentina
- Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Cruz Miguel Cendán
- Department of Pharmacology, Institute of Neuroscience, Biomedical Research Center (CIBM), Faculty of Medicine, University of Granada and Biosanitary Research Institute ibs. Granada, Granada, Spain
| | - Ignacio Morón-Henche
- Department of Psychobiology and Centre of Investigation of Mind, Brain, and Behaviour (CIMCYC), University of Granada, Granada, Spain
| | - Claudio D'Addario
- Dipartimento di Bioscienze e Tecnologie Agro-Alimentari e Ambientali, Università degli Studi di Teramo, Teramo, Italy
| | - Ricardo Marcos Pautassi
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET, Universidad Nacional de Córdoba, Córdoba, Argentina
- Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
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Cuesta-Martínez S, Ruiz-Leyva L, Jiménez-García AM, Aparicio-Mescua T, López-Guarnido O, Pautassi RM, Morón I, Cendán CM. Binging from Food to Alcohol: A Sequential Interaction Between Binging Behaviors in Male Wistar Rats. Bio Protoc 2023; 13:e4781. [PMID: 37575384 PMCID: PMC10415202 DOI: 10.21769/bioprotoc.4781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/11/2023] [Accepted: 06/13/2023] [Indexed: 08/15/2023] Open
Abstract
The development of excessive alcohol (ethanol) and/or highly palatable food self-administration is an essential task to elucidate the neurobiological mechanisms that underlie these behaviors. Previous work has highlighted that ethanol self-administration is modulated by both the induction of aversive states (i.e., stress or frustration) and by the concurrent availability of appetitive stimuli (e.g., food). In our protocol, rats are food deprived for three days until they reach 82%-85% of their ad libitum weight. After that, rats are exposed daily for 10 days to a brief binge or control eating experience with highly sugary and palatable food (i.e., the ingestion of 11.66 and 0.97 kcal/3 min, respectively), which is followed by a two-bottle-choice test (ethanol vs. water) in their home cages for 90 min. This model induces robust binge eating, which is followed by a selective increase in ethanol self-administration. Therefore, this protocol allows to study: a) behavioral and neurobiological factors related to binge eating, b) different stages of alcohol use, and c) interactions between the latter and other addictive-like behaviors, like binge eating.
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Affiliation(s)
- Sergio Cuesta-Martínez
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
- Biosanitary Research Institute, University Hospital Complex of Granada, 18012, Granada, Spain
| | - Leandro Ruiz-Leyva
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
- Biosanitary Research Institute, University Hospital Complex of Granada, 18012, Granada, Spain
| | - Ana María Jiménez-García
- Department of Psychology, Faculty of Life Sciences and Nature, University of Nebrija, Hoyo de Manzanares, 28240, Madrid, Spain
| | - Teresa Aparicio-Mescua
- Department of Psychobiology and Centre of Investigation of Mind, Brain, and Behavior (CIMCYC), Faculty of Psychology, University of Granada, Campus Cartuja, 18071, Granada, Spain
| | - Olga López-Guarnido
- Department of Legal Medicine and Toxicology, Faculty of Medicine, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
| | - Ricardo Marcos Pautassi
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC – CONICET-Universidad Nacional de Córdoba), Córdoba, 5000, Argentina, Faculty of Psychology, UNC, Córdoba, Argentina
| | - Ignacio Morón
- Department of Psychobiology and Centre of Investigation of Mind, Brain, and Behavior (CIMCYC), Faculty of Psychology, University of Granada, Campus Cartuja, 18071, Granada, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
- Biosanitary Research Institute, University Hospital Complex of Granada, 18012, Granada, Spain
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Leyva LR, Salguero A, Virgolini MB, Romero VL, Marengo L, Fabio MC, Morón I, Cendán CM, Pautassi RM. Binge eating promotes ethanol self-administration in female rats with a history of intermittent ethanol exposure at adolescence. Drug Alcohol Depend 2023; 243:109737. [PMID: 36535099 DOI: 10.1016/j.drugalcdep.2022.109737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/04/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
BACKGROUND Ethanol drinking begins during adolescence and, particularly when occurs in a binge-like pattern, exerts lingering adverse consequences. Pre-clinical studies indicate that intermittent ethanol exposure (IEA, a model of repeated ethanol intoxication), or binge eating (BE) can increase subsequent ethanol consumption. It is unknown if the promoting effects of BE upon ethanol drinking are found in female rats and are modulated by IEA at adolescence. This study assessed interactive effects between IEA and BE, upon ethanol drinking. METHODS Female Wistar rats were given 4.0 g/kg ethanol, every other day from postnatal day 25-45. At adulthood, they were exposed to sessions in which a brief offering of a sizeable portion of highly palatable sugary pills was followed by a 120-min exposure to an ethanol bottle. RESULTS Exploratory activity and recognition memory was not affected by the IEA. Glutathione peroxidase and catalase activity, and lipid peroxidation (measured in blood and brain at the end of the procedure) were not significantly affected by IEA or BE exposure. BE alone had a mild promoting effect on ethanol ingestion. Those rats that underwent IEA and BE, however, exhibited heightened and sustained ethanol self-administration (average of 2.12 g/kg/120 min, vs 1.15 g/kg/120 min of the other groups), that persisted throughout the BE sessions. IEA and a history of BE also promoted ethanol intake or preference in a two-bottle endpoint test. CONCLUSION The study suggests that exposure to IEA exerts, when followed by BE at adulthood, promoting effects upon ethanol intake, particularly at concentrations ≥ 6%.
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Affiliation(s)
- Leandro Ruiz Leyva
- Department of Pharmacology, Institute of Neuroscience, Biomedical Research Center (CIBM) Faculty of Medicine, University of Granada, and Instituto de Investigación Biosanitaria (ibs.GRANADA), Granada, Spain
| | - Agustín Salguero
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba 5000, Argentina
| | - Miriam Beatriz Virgolini
- Departamento de Farmacología Otto Orsingher, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina; Instituto de Farmacología Experimental de Córdoba-Consejo Nacional de Investigaciones Técnicas (IFEC-CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina
| | - Verónica Leonor Romero
- Departamento de Farmacología Otto Orsingher, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina; Instituto de Farmacología Experimental de Córdoba-Consejo Nacional de Investigaciones Técnicas (IFEC-CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina
| | - Leonardo Marengo
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba 5000, Argentina
| | - María Carolina Fabio
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba 5000, Argentina; Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Ignacio Morón
- Department of Psychobiology and Centre of Investigation of Mind, Brain, and Behavior (CIMCYC), Faculty of Psychology, University of Granada, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Institute of Neuroscience, Biomedical Research Center (CIBM) Faculty of Medicine, University of Granada, and Instituto de Investigación Biosanitaria (ibs.GRANADA), Granada, Spain.
| | - Ricardo Marcos Pautassi
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba 5000, Argentina; Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina.
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Marengo L, Fabio MC, Bernal IS, Salguero A, Molina JC, Morón I, Cendán CM, D'Addario C, Pautassi RM. Folate administration ameliorates neurobehavioral effects of prenatal ethanol exposure. Am J Drug Alcohol Abuse 2023; 49:63-75. [PMID: 36722686 DOI: 10.1080/00952990.2022.2159425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Background: Prenatal ethanol exposure (PEE) induces heightened ethanol intake at adolescence in preclinical studies. Ethanol intake alters the absorption of folate, a methyl-group donor critical for numerous cellular functions. The prenatal administration of folate is, therefore, a promising approach to reduce the effects of PEE.Objectives: Experiment 1 determined if prenatal folate modulated the effects of PEE on ethanol intake, anxiety-like response, and exploratory behaviors (Experiment 1) in Wistar rats. Experiment 2 assessed, in rats not given PEE, if postnatal folate reversed effects of ethanol exposure at postnatal days 28-42. Experiment 3 assessed if folate altered blood ethanol levels (BELs).Methods: Experiment 1 involved 242 (125 male) adolescent Wistar rats derived from dams given folate (20 mg/kg, gestational days - GD- 13-20) + ethanol (2.0 g/kg, GD 17-20), ethanol, or vehicle only at pregnancy. Experiment 2 involved 29 male adolescents administered vehicle or ethanol doses co-administered or not with folate. In Experiment 3 twelve adult females were tested for BELs after folate administration. These tests were applied: intake tests, light dark box (LDB), elevated plus maze, open field and concentric square field.Results: PEE heightened ethanol intake (η2 ps = 0.06-07) and induced hyperactivity and a reduced latency to exit the white area of the LDB (η2 ps = 0.12-17). These effects were partially inhibited by folate (p > .05). Rats exposed to ethanol exposure at adolescence exhibited reduced motor activity (η2 p = .17), regardless of folate treatment. Folate did not affect BELs.Conclusion: Folate administration should be considered as a preventive or acute treatment to attenuate the neurobehavioral effects of PEE.
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Affiliation(s)
- Leonardo Marengo
- Department of Psychophysiology, Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba, Argentina
| | - María Carolina Fabio
- Department of Psychophysiology, Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba, Argentina.,Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Ivan Servín Bernal
- Department of Psychophysiology, Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba, Argentina
| | - Agustín Salguero
- Department of Psychophysiology, Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba, Argentina
| | - Juan Carlos Molina
- Department of Psychophysiology, Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba, Argentina.,Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Ignacio Morón
- Department of Psychobiology and Centre of Investigation of Mind, Brain, and Behavior (CIMCYC), Faculty of Psychology, University of Granada, Granada, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Institute of Neuroscience, Biomedical Research Center (CIBM) Faculty of Medicine, University of Granada, and Biosanitary Research Institute ibs. GRANADA, Granada, Spain
| | | | - Ricardo Marcos Pautassi
- Department of Psychophysiology, Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-Universidad Nacional de Córdoba), Córdoba, Argentina.,Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
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5
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Salguero A, Marengo L, Portillo-Salido E, Ruiz-Leyva L, Cendán CM, Morón I, Marcos Pautassi R. Administration of the sigma-1 receptor agonist PRE-084 at emerging adulthood, but not at early adolescence, attenuated ethanol-induced conditioned taste aversion in female rats. Neurosci Lett 2022; 778:136585. [PMID: 35318075 DOI: 10.1016/j.neulet.2022.136585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 03/07/2022] [Accepted: 03/18/2022] [Indexed: 11/17/2022]
Abstract
Ethanol-induced conditioned taste aversion (CTA) is greater in late adolescence or young adulthood than in early adolescence. The role of the sigma receptor system in this age-related difference has not been extensively explored, particularly in female rats. This study assessed the effects of the activation of sigma-1 receptors (S1-R), via the selective S1-R agonist PRE-084, on ethanol-induced CTA at early or at terminal adolescence/emerging adulthood (28 or 56 days-old at the beginning of the procedures, respectively) in female Wistar rats. The modulation of binge-like ethanol intake by PRE-084 was assessed at terminal adolescence. S1-R activation at the acquisition of ethanol-induced CTA attenuated such learning at terminal but not at early adolescence. PRE-084 did not significantly affect ethanol binge drinking in the terminal adolescents. These results highlight the role of S1-R in ethanol-induced CTA and suggest that differential functionality of this transmitter system may underlie age-specific sensitivities to the aversive effects of ethanol.
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Affiliation(s)
- Agustín Salguero
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Córdoba C.P. 5000, Argentina
| | - Leonardo Marengo
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Córdoba C.P. 5000, Argentina
| | | | - Leandro Ruiz-Leyva
- Department of Pharmacology, Institute of Neuroscience, Biomedical Research Center (CIBM) Faculty of Medicine, University of Granada and Biosanitary Research Institute ibs.GRANADA, Granada, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Institute of Neuroscience, Biomedical Research Center (CIBM) Faculty of Medicine, University of Granada and Biosanitary Research Institute ibs.GRANADA, Granada, Spain
| | - Ignacio Morón
- Department of Psychobiology and Centre of Investigation of Mind, Brain, and Behaviour (CIMCYC), University of Granada, Spain.
| | - Ricardo Marcos Pautassi
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Córdoba C.P. 5000, Argentina; Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, C.P. 5000, Argentina.
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6
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Ruiz‐Leyva L, Vázquez‐Ágredos A, Jiménez‐García AM, López‐Guarnido O, Pla A, Pautassi RM, Morón Henche I, Cendán CM. From binge eating to binge drinking: A new and robust paradigm for assessing binge ethanol self-administration in male rats. Addict Biol 2022; 27:e13153. [PMID: 35229947 PMCID: PMC9285499 DOI: 10.1111/adb.13153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 12/08/2021] [Accepted: 01/20/2022] [Indexed: 11/29/2022]
Abstract
Animal models of alcohol (ethanol) self-administration are crucial to dissect the neurobiological mechanisms underlying alcohol dependence, yet only a few of these induce pharmacologically relevant levels of alcohol consumption and rarely the alcohol self-administration co-occurs with other addictive behaviours. The present study aims to validate a novel model of voluntary ethanol consumption in male Wistar rats, in which ethanol access follows a binge eating experience. Over 10 sessions, Wistar rats were exposed to binge or control eating (i.e., the ingestion of 11.66 and 0.97 kcal/3 min, respectively, derived from a highly palatable food), immediately followed by two-bottle choice intake tests (2%, 6%, 10% or 14% w/w ethanol vs. water). Rats exposed to binge eating drank significantly more 6% or 10% (w/w) ethanol than control peers, reaching up to 6.3 gEtOH /kg. Rats stimulated with 2%, 6%, 10% or 14% ethanol after binge eating, but not those given those ethanol concentrations after control eating, exhibited significant within-group increases in ethanol drinking. This ethanol consumption was not altered by quinine adulteration (up to 0.1 g/L), and it was blocked by naltrexone (10 mg/kg), administered immediately before binge eating. Blood ethanol levels significantly correlated with ethanol consumption; and the more ethanol consumed, the greater the distance travelled in an open field test conducted after the two-bottle choice test. Altogether, this self-administration model seems a valid and robust alternative with remarkable potential for research on different stages of the alcohol addiction and, particularly, to assess interactions between alcohol consumption and others addictive-like behaviours.
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Affiliation(s)
- Leandro Ruiz‐Leyva
- Department of Pharmacology, Institute of Neuroscience, Biomedical Research Center (CIBM) Faculty of Medicine University of Granada Granada Spain
- Department of Psychobiology, Institute of Neuroscience, Biomedical Research Center (CIBM) University of Granada Spain
| | | | - Ana M. Jiménez‐García
- Department of Psychology, Faculty of Life Sciences and Nature University of Nebrija Hoyo de Manzanares Spain
| | - Olga López‐Guarnido
- Department of Legal Medicine and Toxicology, Faculty of Medicine University of Granada Spain
| | - Antonio Pla
- Department of Legal Medicine and Toxicology, Faculty of Medicine University of Granada Spain
- Hospital Universitario Clínico San Cecilio Granada Spain
| | - Ricardo Marcos Pautassi
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC‐CONICET Universidad Nacional de Córdoba (INIMEC‐CONICET‐UNC) y Facultad de Psicología, UNC Córdoba Argentina
| | - Ignacio Morón Henche
- Department of Psychobiology and Centre of Investigation of Mind, Brain, and Behavior (CIMCYC), Faculty of Psychology University of Granada Granada Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Institute of Neuroscience, Biomedical Research Center (CIBM) Faculty of Medicine University of Granada Granada Spain
- Department of Psychobiology, Institute of Neuroscience, Biomedical Research Center (CIBM) University of Granada Spain
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7
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Díaz JL, Cuevas F, Oliva AI, Font D, Sarmentero MÁ, Álvarez-Bercedo P, López-Valbuena JM, Pericàs MA, Enrech R, Montero A, Yeste S, Vidal-Torres A, Álvarez I, Pérez P, Cendán CM, Cobos EJ, Vela JM, Almansa C. Tricyclic Triazoles as σ 1 Receptor Antagonists for Treating Pain. J Med Chem 2021; 64:5157-5170. [PMID: 33826322 DOI: 10.1021/acs.jmedchem.1c00244] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The synthesis and pharmacological activity of a new series of 5a,7,8,8a-tetrahydro-4H,6H-pyrrolo[3,4-b][1,2,3]triazolo[1,5-d][1,4]oxazine derivatives as potent sigma-1 receptor (σ1R) ligands are reported. A lead optimization program aimed at improving the aqueous solubility of parent racemic nonpolar derivatives led to the identification of several σ1R antagonists with a good absorption, distribution, metabolism, and excretion in vitro profile, no off-target affinities, and characterized by a low basic pKa (around 5) that correlates with high exposure levels in rodents. Two compounds displaying a differential brain-to-plasma ratio distribution profile, 12lR and 12qS, exhibited a good analgesic profile and were selected as preclinical candidates for the treatment of pain.
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Affiliation(s)
- José Luis Díaz
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Félix Cuevas
- The Barcelona Institute of Science and Technology, Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Ana I Oliva
- The Barcelona Institute of Science and Technology, Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Daniel Font
- The Barcelona Institute of Science and Technology, Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - M Ángeles Sarmentero
- The Barcelona Institute of Science and Technology, Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Paula Álvarez-Bercedo
- The Barcelona Institute of Science and Technology, Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - José M López-Valbuena
- The Barcelona Institute of Science and Technology, Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Miquel A Pericàs
- The Barcelona Institute of Science and Technology, Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franqués 1-11, 08028 Barcelona, Spain
| | - Raquel Enrech
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Ana Montero
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Sandra Yeste
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Alba Vidal-Torres
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Inés Álvarez
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Pilar Pérez
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Faculty of Medicine, University of Granada, 18016 Granada, Spain
- Biosanitary Research Institute ibs.GRANADA, 18012 Granada, Spain
| | - Enrique J Cobos
- Department of Pharmacology, Faculty of Medicine, University of Granada, 18016 Granada, Spain
- Biosanitary Research Institute ibs.GRANADA, 18012 Granada, Spain
| | - José Miguel Vela
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Carmen Almansa
- Drug Discovery and Preclinical Development, ESTEVE Pharmaceuticals S.A., Carrer Baldiri Reixac, 4-8. Parc Científic de Barcelona, 08028 Barcelona, Spain
- WELAB, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
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8
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Perea C, Vázquez-Ágredos A, Ruiz-Leyva L, Morón I, Zúñiga JM, Cendán CM. Caloric Restriction in Group-Housed Mice: Littermate and Sex Influence on Behavioral and Hormonal Data. Front Vet Sci 2021; 8:639187. [PMID: 33937370 PMCID: PMC8081842 DOI: 10.3389/fvets.2021.639187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 03/18/2021] [Indexed: 11/13/2022] Open
Abstract
Much of the research done on aging, oxidative stress, anxiety, and cognitive and social behavior in rodents has focused on caloric restriction (CR). This often involves several days of single housing, which can cause numerous logistical problems, as well as cognitive and social dysfunctions. Previous results in our laboratory showed the viability of long-term CR in grouped rats. Our research has studied the possibility of CR in grouped female and male littermates and unrelated CB6F1/J (C57BL/6J × BALBc/J hybrid strain) mice, measuring: (i) possible differences in body mass proportions between mice in ad libitum and CR conditions (at 70% of ad libitum), (ii) aggressive behavior, using the number of pushes and chasing behavior time as an indicator and social behavior using the time under the feeder as indicator, and (iii) difference in serum adrenocorticotropic hormone (ACTH) concentrations (stress biomarker), under ad libitum and CR conditions. Results showed the impossibility of implementing CR in unrelated male mice. In all other groups, CR was possible, with a less aggressive behavior (measured only with the number of pushes) observed in the unrelated female mice under CR conditions. In that sense, the ACTH levels measured on the last day of CR showed no difference in stress levels. These results indicate that implementantion of long-term CR in mice can be optimized technically and also related to their well-being by grouping animals, in particular, related mice.
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Affiliation(s)
- Cristina Perea
- Center of Scientific Instrumentation, University of Granada, Granada, Spain
| | - Ana Vázquez-Ágredos
- Department of Psychobiology, Institute of Neurosciences, Center for Biomedical Research (CIBM), University of Granada, Granada, Spain
| | - Leandro Ruiz-Leyva
- Department of Pharmacology, Faculty of Medicine, Biomedical Research Center, Institute of Neuroscience, University of Granada, Parque Tecnológico de Ciencias de la Salud, Granada, Spain.,Biosanitary Research Institute ibs.GRANADA, Granada, Spain
| | - Ignacio Morón
- Department of Psychobiology, Faculty of Psychology, Center of Investigation of Mind, Brain, and Behavior, University of Granada, Granada, Spain
| | | | - Cruz Miguel Cendán
- Department of Pharmacology, Faculty of Medicine, Biomedical Research Center, Institute of Neuroscience, University of Granada, Parque Tecnológico de Ciencias de la Salud, Granada, Spain.,Biosanitary Research Institute ibs.GRANADA, Granada, Spain
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9
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Díaz JL, García M, Torrens A, Caamaño AM, Enjo J, Sicre C, Lorente A, Port A, Montero A, Yeste S, Álvarez I, Martín M, Maldonado R, de la Puente B, Vidal-Torres A, Cendán CM, Vela JM, Almansa C. EST64454: a Highly Soluble σ 1 Receptor Antagonist Clinical Candidate for Pain Management. J Med Chem 2020; 63:14979-14988. [PMID: 33237785 DOI: 10.1021/acs.jmedchem.0c01575] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The synthesis and pharmacological activity of a new series of pyrazoles that led to the identification of 1-(4-(2-((1-(3,4-difluorophenyl)-1H-pyrazol-3-yl)methoxy)ethyl)piperazin-1-yl)ethanone (9k, EST64454) as a σ1 receptor (σ1R) antagonist clinical candidate for the treatment of pain are reported. The compound 9k is easily obtained through a five-step synthesis suitable for the production scale and shows an outstanding aqueous solubility, which together with its high permeability in Caco-2 cells will allow its classification as a BCS class I compound. It also shows high metabolic stability in all species, linked to an adequate pharmacokinetic profile in rodents, and antinociceptive properties in the capsaicin and partial sciatic nerve ligation models in mice.
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Affiliation(s)
- José Luis Díaz
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Mónica García
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Antoni Torrens
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | | | - Juan Enjo
- Galchimia, S.A., Cebreiro, s/n, 15823 O Pino, A Coruña, Spain
| | - Cristina Sicre
- Galchimia, S.A., Cebreiro, s/n, 15823 O Pino, A Coruña, Spain
| | - Adriana Lorente
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Adriana Port
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Ana Montero
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Sandra Yeste
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Inés Álvarez
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Miquel Martín
- Laboratory of Neuropharmacology, Facultat de Ciències de la Salut i de la Vida, Universitat Pompeu Fabra, Dr. Aiguader, 88, 08003 Barcelona, Spain
| | - Rafael Maldonado
- Laboratory of Neuropharmacology, Facultat de Ciències de la Salut i de la Vida, Universitat Pompeu Fabra, Dr. Aiguader, 88, 08003 Barcelona, Spain
| | - Beatriz de la Puente
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Alba Vidal-Torres
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Faculty of Medicine, University of Granada, 18016 Granada, Spain
| | - José Miguel Vela
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
| | - Carmen Almansa
- ESTEVE Pharmaceuticals, Torre Esteve, Passeig de la Zona Franca, 109, 08038 Barcelona, Spain
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10
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Ruiz-Leyva L, Salguero A, Morón I, Portillo-Salido E, Cendán CM, Pautassi RM. Sigma-1 antagonism inhibits binge ethanol drinking at adolescence. Drug Alcohol Depend 2020; 215:108214. [PMID: 32791285 DOI: 10.1016/j.drugalcdep.2020.108214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/14/2020] [Accepted: 07/23/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND Ethanol use during adolescence is a significant health problem, yet the pharmacological treatments to reduce adolescent binge drinking are scarce. The present study assessed, in male and female adolescent Wistar rats, if the sigma-1 receptor (S1-R) antagonists S1RA or BD-1063 disrupted ethanol drinking. METHODS Three times a week, for two weeks, the rats received the S1-R antagonists. Thirty min later they were exposed, for 2 h, to a bottle of 8% or 10 % v/v ethanol. A 24 h, two-bottle, ethanol intake test was conducted after termination of these procedures. A subset of these rats was tested for recognition memory via the novel object recognition test. RESULTS The rats given 64 mg/kg S1RA drank, in each binge session, significantly less than vehicle counterparts. Male rats given 4 or 16 mg/kg S1RA drank significantly less than those given 0 mg/kg in session 3 or in session 1 and 2, respectively; whereas female rats given 4 or 16 mg/kg drank significantly less than females given 0 mg/kg in session 2-5 or in sessions 2-6, respectively. Administration of 32 mg/kg, but not of 2 or 8 mg/kg, BD-1063 suppressed, across sessions, ethanol drinking. S1-R antagonism reduced absolute ethanol drinking at the two-bottle choice post-test. Recognition memory was not affected by the ethanol exposure. CONCLUSIONS The results indicate that S1-R antagonists may be promising targets to prevent increases in ethanol intake at adolescence. The persistent effect of S1-R antagonism in free-choice drinking suggests that modulation of the S1-R is altering plastic effects associated with ethanol exposure.
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Affiliation(s)
- Leandro Ruiz-Leyva
- Department of Pharmacology, Faculty of Medicine, University of Granada, Spain; Institute of Neuroscience, Biomedical Research Center (CIBM), University of Granada, Spain; Instituto de Investigación Biosanitaria (IBS), Granada, Spain
| | - Agustín Salguero
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Córdoba, C.P. 5000, Argentina; Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, C.P. 5000, Argentina
| | - Ignacio Morón
- Department of Psychobiology and Centre of Investigation of Mind, Brain, and Behaviour (CIMCYC), University of Granada, Spain
| | - Enrique Portillo-Salido
- Drug Discovery and Preclinical Development, Esteve Pharmaceuticals, Parc Científic de Barcelona, Barcelona, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Faculty of Medicine, University of Granada, Spain; Institute of Neuroscience, Biomedical Research Center (CIBM), University of Granada, Spain; Instituto de Investigación Biosanitaria (IBS), Granada, Spain.
| | - Ricardo Marcos Pautassi
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Córdoba, C.P. 5000, Argentina; Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, C.P. 5000, Argentina.
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11
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Salguero A, Suarez A, Luque M, Ruiz-Leyva L, Cendán CM, Morón I, Pautassi RM. Binge-Like, Naloxone-Sensitive, Voluntary Ethanol Intake at Adolescence Is Greater Than at Adulthood, but Does Not Exacerbate Subsequent Two-Bottle Choice Drinking. Front Behav Neurosci 2020; 14:50. [PMID: 32327981 PMCID: PMC7161160 DOI: 10.3389/fnbeh.2020.00050] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 03/19/2020] [Indexed: 12/31/2022] Open
Abstract
The present study assessed the effects of ethanol exposure during adolescence or adulthood. We exposed Wistar rats, males or females, to self-administered 8–10% (v/v) ethanol (BINGE group) during the first 2 h of the dark cycle, three times a week (Monday, Wednesday, and Friday) during postnatal days (PDs) 32–54 or 72–94 (adolescent and adults, respectively). During this period, controls were only handled, and a third (IP) condition was given ethanol intraperitoneal administrations, three times a week (Monday, Wednesday, and Friday), at doses that matched those self-administered by the BINGE group. The rats were tested for ethanol intake and preference in a two-bottle (24 h long) choice test, shortly before (PD 30 or 70) and shortly after (PD 56 or 96) exposure to the binge or intraperitoneal protocol; and then tested for free-choice drinking during late adulthood (PDs 120–139) in intermittent two-bottle intake tests. Binge drinking was significantly greater in adolescents vs. adults, and was blocked by naloxone (5.0 mg/kg) administered immediately before the binge session. Mean blood ethanol levels (mg/dl) at termination of binge session 3 were 60.82 ± 22.39. Ethanol exposure at adolescence, but not at adulthood, significantly reduced exploration of an open field-like chamber and significantly increased shelter-seeking behavior in the multivariate concentric square field. The rats that had been initially exposed to ethanol at adolescence drank, during the intake tests conducted at adulthood, significantly more than those that had their first experience with ethanol at adulthood, an effect that was similar among BINGE, IP and control groups. The study indicates that binge ethanol drinking is greater in adolescent that in adults and is associated with heightened ethanol intake at adulthood. Preventing alcohol access to adolescents should reduce the likelihood of problematic alcohol use or alcohol-related consequences.
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Affiliation(s)
- Agustín Salguero
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET-Universidad Nacional de Córdoba, Córdoba, Argentina.,Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Andrea Suarez
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET-Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Maribel Luque
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET-Universidad Nacional de Córdoba, Córdoba, Argentina.,Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - L Ruiz-Leyva
- Department of Pharmacology, Faculty of Medicine, University of Granada, Granada, Spain.,Institute of Neuroscience, Biomedical Research Center (CIBM), University of Granada, Granada, Spain.,Biosanitary Research Institute (IBS), University Hospital Complex of Granada, Granada, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Faculty of Medicine, University of Granada, Granada, Spain.,Institute of Neuroscience, Biomedical Research Center (CIBM), University of Granada, Granada, Spain.,Biosanitary Research Institute (IBS), University Hospital Complex of Granada, Granada, Spain
| | - Ignacio Morón
- Department of Psychobiology and Research Center for Mind, Brain, and Behavior (CIMCYC), University of Granada, Faculty of Psychology, Granada, Spain
| | - Ricardo Marcos Pautassi
- Instituto de Investigación Médica M. y M. Ferreyra, INIMEC-CONICET-Universidad Nacional de Córdoba, Córdoba, Argentina.,Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
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12
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Jiménez-García AM, Ruiz-Leyva L, Vázquez-Ágredos A, Torres C, Papini MR, Cendán CM, Morón I. Consummatory Successive Negative Contrast in Rats. Bio Protoc 2019; 9:e3201. [PMID: 33654997 DOI: 10.21769/bioprotoc.3201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 03/24/2019] [Accepted: 03/17/2019] [Indexed: 11/02/2022] Open
Abstract
Using animal models in addiction and pain research is pivotal to unravel new pathways and mechanisms for the treatment of these disorders. Reward devaluation through a consummatory successive negative contrast (cSNC) task has shown the ability to reduce physical pain sensitivity (hypoalgesia) and increase oral ethanol consumption in rats. The procedure is based on exposing the experimental animals to a 32% sucrose solution during several sessions (preshift sessions) followed by a devaluation to 4% sucrose during the next few sessions (postshift sessions). The cSNC effect can be monitored by comparing the experimental group to an unshifted control that had access to 4% sucrose throughout the entire experiment (preshift and postshift sessions). The cSNC phenomenon is defined by lower consumption of sucrose in the downshifted group than in the unshifted group during postshfit sessions.
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Affiliation(s)
- Ana María Jiménez-García
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
| | - Leandro Ruiz-Leyva
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
| | - Ana Vázquez-Ágredos
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain
| | - Carmen Torres
- Department of Psychology, University of Jaén, Campus Las Lagunillas, 23071, Jaén, Spain
| | - Mauricio R Papini
- Department of Psychology, Texas Christian University, Fort Worth, TX, 76129, USA
| | - Cruz Miguel Cendán
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18016, Granada, Spain.,Biosanitary Research Institute, University Hospital Complex of Granada, 18012, Granada, Spain
| | - Ignacio Morón
- Department of Psychobiology and Research Center for Mind, Brain, and Behavior (CIMCYC), University of Granada, Faculty of Psychology, Campus Cartuja, 18071, Granada, Spain
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13
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González-Cano R, Tejada MÁ, Artacho-Cordón A, Nieto FR, Entrena JM, Wood JN, Cendán CM. Effects of Tetrodotoxin in Mouse Models of Visceral Pain. Mar Drugs 2017; 15:E188. [PMID: 28635651 PMCID: PMC5484138 DOI: 10.3390/md15060188] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 06/07/2017] [Accepted: 06/16/2017] [Indexed: 12/11/2022] Open
Abstract
Visceral pain is very common and represents a major unmet clinical need for which current pharmacological treatments are often insufficient. Tetrodotoxin (TTX) is a potent neurotoxin that exerts analgesic actions in both humans and rodents under different somatic pain conditions, but its effect has been unexplored in visceral pain. Therefore, we tested the effects of systemic TTX in viscero-specific mouse models of chemical stimulation of the colon (intracolonic instillation of capsaicin and mustard oil) and intraperitoneal cyclophosphamide-induced cystitis. The subcutaneous administration of TTX dose-dependently inhibited the number of pain-related behaviors in all evaluated pain models and reversed the referred mechanical hyperalgesia (examined by stimulation of the abdomen with von Frey filaments) induced by capsaicin and cyclophosphamide, but not that induced by mustard oil. Morphine inhibited both pain responses and the referred mechanical hyperalgesia in all tests. Conditional nociceptor‑specific Nav1.7 knockout mice treated with TTX showed the same responses as littermate controls after the administration of the algogens. No motor incoordination after the administration of TTX was observed. These results suggest that blockade of TTX-sensitive sodium channels, but not Nav1.7 subtype alone, by systemic administration of TTX might be a potential therapeutic strategy for the treatment of visceral pain.
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Affiliation(s)
- Rafael González-Cano
- Department of Pharmacology, Biomedical Research Centre and Institute of Neuroscience, Faculty of Medicine, University of Granada, 18016 Granada, Spain.
- Biosanitary Research Institute, University Hospital Complex of Granada, 18012 Granada, Spain.
| | - Miguel Ángel Tejada
- Department of Pharmacology, Biomedical Research Centre and Institute of Neuroscience, Faculty of Medicine, University of Granada, 18016 Granada, Spain.
- Biosanitary Research Institute, University Hospital Complex of Granada, 18012 Granada, Spain.
| | - Antonia Artacho-Cordón
- Department of Pharmacology, Biomedical Research Centre and Institute of Neuroscience, Faculty of Medicine, University of Granada, 18016 Granada, Spain.
- Biosanitary Research Institute, University Hospital Complex of Granada, 18012 Granada, Spain.
| | - Francisco Rafael Nieto
- Department of Pharmacology, Biomedical Research Centre and Institute of Neuroscience, Faculty of Medicine, University of Granada, 18016 Granada, Spain.
- Biosanitary Research Institute, University Hospital Complex of Granada, 18012 Granada, Spain.
| | - José Manuel Entrena
- Animal Behavior Research Unit, Scientific Instrumentation Center, University of Granada, Armilla, 18100 Granada, Spain.
| | - John N Wood
- Molecular Nociception Group, Wolfson Institute for Biomedical Research, University College London, London WC1E 6BT, UK.
| | - Cruz Miguel Cendán
- Department of Pharmacology, Biomedical Research Centre and Institute of Neuroscience, Faculty of Medicine, University of Granada, 18016 Granada, Spain.
- Biosanitary Research Institute, University Hospital Complex of Granada, 18012 Granada, Spain.
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14
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Hockley JRF, González-Cano R, McMurray S, Tejada-Giraldez MA, McGuire C, Torres A, Wilbrey AL, Cibert-Goton V, Nieto FR, Pitcher T, Knowles CH, Baeyens JM, Wood JN, Winchester WJ, Bulmer DC, Cendán CM, McMurray G. Visceral and somatic pain modalities reveal Na V 1.7-independent visceral nociceptive pathways. J Physiol 2017; 595:2661-2679. [PMID: 28105664 DOI: 10.1113/jp272837] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 01/16/2017] [Indexed: 12/17/2022] Open
Abstract
KEY POINTS Voltage-gated sodium channels play a fundamental role in determining neuronal excitability. Specifically, voltage-gated sodium channel subtype NaV 1.7 is required for sensing acute and inflammatory somatic pain in mice and humans but its significance in pain originating from the viscera is unknown. Using comparative behavioural models evoking somatic and visceral pain pathways, we identify the requirement for NaV 1.7 in regulating somatic (noxious heat pain threshold) but not in visceral pain signalling. These results enable us to better understand the mechanisms underlying the transduction of noxious stimuli from the viscera, suggest that the investigation of pain pathways should be undertaken in a modality-specific manner and help to direct drug discovery efforts towards novel visceral analgesics. ABSTRACT Voltage-gated sodium channel NaV 1.7 is required for acute and inflammatory pain in mice and humans but its significance for visceral pain is unknown. Here we examine the role of NaV 1.7 in visceral pain processing and the development of referred hyperalgesia using a conditional nociceptor-specific NaV 1.7 knockout mouse (NaV 1.7Nav1.8 ) and selective small-molecule NaV 1.7 antagonist PF-5198007. NaV 1.7Nav1.8 mice showed normal nociceptive behaviours in response to intracolonic application of either capsaicin or mustard oil, stimuli known to evoke sustained nociceptor activity and sensitization following tissue damage, respectively. Normal responses following induction of cystitis by cyclophosphamide were also observed in both NaV 1.7Nav1.8 and littermate controls. Loss, or blockade, of NaV 1.7 did not affect afferent responses to noxious mechanical and chemical stimuli in nerve-gut preparations in mouse, or following antagonism of NaV 1.7 in resected human appendix stimulated by noxious distending pressures. However, expression analysis of voltage-gated sodium channel α subunits revealed NaV 1.7 mRNA transcripts in nearly all retrogradely labelled colonic neurons, suggesting redundancy in function. By contrast, using comparative somatic behavioural models we identify that genetic deletion of NaV 1.7 (in NaV 1.8-expressing neurons) regulates noxious heat pain threshold and that this can be recapitulated by the selective NaV 1.7 antagonist PF-5198007. Our data demonstrate that NaV 1.7 (in NaV 1.8-expressing neurons) contributes to defined pain pathways in a modality-dependent manner, modulating somatic noxious heat pain, but is not required for visceral pain processing, and advocate that pharmacological block of NaV 1.7 alone in the viscera may be insufficient in targeting chronic visceral pain.
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Affiliation(s)
- James R F Hockley
- Neuroscience and Pain Research Unit, Pfizer Ltd., The Portway Building, Granta Science Park, Cambridge, CB21 6GS, UK
| | - Rafael González-Cano
- Department of Pharmacology, Biomedical Research Centre (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Granada, Spain
| | - Sheridan McMurray
- Neuroscience and Pain Research Unit, Pfizer Ltd., The Portway Building, Granta Science Park, Cambridge, CB21 6GS, UK
| | - Miguel A Tejada-Giraldez
- Department of Pharmacology, Biomedical Research Centre (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Granada, Spain
| | - Cian McGuire
- National Centre for Bowel Research and Surgical Innovation, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, E1 2AT, UK
| | - Antonio Torres
- Department of Biochemistry, Biomedical Research Centre (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Granada, Spain
| | - Anna L Wilbrey
- Neuroscience and Pain Research Unit, Pfizer Ltd., The Portway Building, Granta Science Park, Cambridge, CB21 6GS, UK
| | - Vincent Cibert-Goton
- National Centre for Bowel Research and Surgical Innovation, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, E1 2AT, UK
| | - Francisco R Nieto
- Department of Pharmacology, Biomedical Research Centre (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Granada, Spain
| | - Thomas Pitcher
- Neuroscience and Pain Research Unit, Pfizer Ltd., The Portway Building, Granta Science Park, Cambridge, CB21 6GS, UK
| | - Charles H Knowles
- National Centre for Bowel Research and Surgical Innovation, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, E1 2AT, UK
| | - José Manuel Baeyens
- Department of Pharmacology, Biomedical Research Centre (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Granada, Spain
| | - John N Wood
- Molecular Nociception Group, Department of Biology, University College London, Gower Street, London, WC1E 6BT, UK
| | - Wendy J Winchester
- Neuroscience and Pain Research Unit, Pfizer Ltd., The Portway Building, Granta Science Park, Cambridge, CB21 6GS, UK
| | - David C Bulmer
- National Centre for Bowel Research and Surgical Innovation, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, E1 2AT, UK
| | - Cruz Miguel Cendán
- Department of Pharmacology, Biomedical Research Centre (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Granada, Spain
| | - Gordon McMurray
- Neuroscience and Pain Research Unit, Pfizer Ltd., The Portway Building, Granta Science Park, Cambridge, CB21 6GS, UK
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15
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Jiménez-García AM, Ruíz-Leyva L, Cendán CM, Torres C, Papini MR, Morón I. Hypoalgesia Induced by Reward Devaluation in Rats. PLoS One 2016; 11:e0164331. [PMID: 27764142 PMCID: PMC5072740 DOI: 10.1371/journal.pone.0164331] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Accepted: 09/25/2016] [Indexed: 11/18/2022] Open
Abstract
Reduced sensitivity to physical pain (hypoalgesia) has been reported after events involving reward devaluation. Reward devaluation was implemented in a consummatory successive negative contrast (cSNC) task. Food-deprived Wistar rats had access to 32% sucrose during 16 sessions followed by access to 4% sucrose during 3 additional sessions. An unshifted control group had access to 4% sucrose throughout the 19 sessions. Pain sensitivity was measured using von Frey filaments (Experiment 1) and Hargreaves thermal stimuli (Experiment 2) in pretraining baseline, 5 min, and 300 min after either the first (session 17) or second (session 18) devaluation session in the cSNC situation. Sucrose consumption was lower in downshifted groups relative to unshifted groups during postshift sessions-the cSNC effect. Hypoalgesia was observed in downshifted groups relative to unshifted controls when pain sensitivity was assessed 5 min after either the first or second devaluation session, regardless of the pain sensitivity test used. Both pain sensitivity tests yielded evidence of hypoalgesia 300 min after the second downshift session, but not 300 min after the first devaluation session. Whereas hypoalgesia was previously shown only after the second devaluation session, here we report evidence of hypoalgesia after both the first and second devaluation sessions using mechanical and thermal nociceptive stimuli. Moreover, the hypoalgesia observed 300 min after the second devaluation session in both experiments provides unique evidence of the effects of reward loss on sensitivity to physical pain 5 hours after the loss episode. The underlying neurobehavioral mechanisms remain to be identified.
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Affiliation(s)
- Ana María Jiménez-García
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Campus Ciencias de la Salud, 18016, Granada, Spain
- Department of Psychobiology and Research Center for Mind, Brain, and Behavior (CIMCYC), University of Granada, Faculty of Psychology, Campus Cartuja, 18071, Granada, Spain
| | - Leandro Ruíz-Leyva
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Campus Ciencias de la Salud, 18016, Granada, Spain
- Department of Psychobiology and Research Center for Mind, Brain, and Behavior (CIMCYC), University of Granada, Faculty of Psychology, Campus Cartuja, 18071, Granada, Spain
| | - Cruz Miguel Cendán
- Department of Pharmacology, Biomedical Research Center (CIBM) and Institute of Neuroscience, Faculty of Medicine, University of Granada, Campus Ciencias de la Salud, 18016, Granada, Spain
| | - Carmen Torres
- Department of Psychology, University of Jaén, Campus Las Lagunillas, 23071, Jaén, Spain
| | - Mauricio R. Papini
- Department of Psychology, Texas Christian University, Fort Worth, TX, 76129, United States of America
| | - Ignacio Morón
- Department of Psychobiology and Research Center for Mind, Brain, and Behavior (CIMCYC), University of Granada, Faculty of Psychology, Campus Cartuja, 18071, Granada, Spain
- * E-mail:
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Nieto FR, Cendán CM, Sánchez-Fernández C, Cobos EJ, Entrena JM, Tejada MA, Zamanillo D, Vela JM, Baeyens JM. Role of sigma-1 receptors in paclitaxel-induced neuropathic pain in mice. J Pain 2012; 13:1107-21. [PMID: 23063344 DOI: 10.1016/j.jpain.2012.08.006] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 08/04/2012] [Accepted: 08/20/2012] [Indexed: 01/22/2023]
Abstract
UNLABELLED Sigma-1 (σ(1)) receptors play a role in different types of pain and in central sensitization mechanisms; however, it is unknown whether they are involved in chemotherapy-induced neuropathic pain. We compared the ability of paclitaxel to induce cold (acetone test) and mechanical (electronic Von Frey test) allodynia in wild-type (WT) and σ(1) receptor knockout (σ(1)-KO) mice. We also tested the effect on paclitaxel-induced painful neuropathy of BD-1063 (16-64 mg/kg, subcutaneously) and S1RA (32-128 mg/kg, subcutaneously), 2 selective σ(1) receptor antagonists that bind to the σ(1) receptor with high affinity and competitively. The responses to cold and mechanical stimuli were similar in WT and σ(1)-KO mice not treated with paclitaxel; however, treatment with paclitaxel (2 mg/kg, intraperitoneally, once per day during 5 consecutive days) produced cold and mechanical allodynia and an increase in spinal cord diphosphorylated extracellular signal-regulated kinase (pERK) in WT but not in σ(1)-KO mice. The administration of BD-1063 or S1RA 30 minutes before each paclitaxel dose prevented the development of cold and mechanical allodynia in WT mice. Moreover, the acute administration of both σ(1) receptor antagonists dose dependently reversed both types of paclitaxel-induced allodynia after they had fully developed. These results suggest that σ(1) receptors play a key role in paclitaxel-induced painful neuropathy. PERSPECTIVE Antagonists of the σ(1) receptor may have therapeutic value for the treatment and/or prevention of paclitaxel-induced neuropathic pain. This possibility is especially interesting in the context of chemotherapy-induced neuropathy, where the onset of nerve damage is predictable and preventive treatment could be administered.
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Affiliation(s)
- Francisco Rafael Nieto
- Department of Pharmacology and Institute of Neuroscience, Faculty of Medicine, University of Granada, Granada, Spain
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Cobos EJ, Entrena JM, Nieto FR, Cendán CM, Del Pozo E. Pharmacology and therapeutic potential of sigma(1) receptor ligands. Curr Neuropharmacol 2010; 6:344-66. [PMID: 19587856 PMCID: PMC2701284 DOI: 10.2174/157015908787386113] [Citation(s) in RCA: 287] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2007] [Revised: 07/18/2008] [Accepted: 07/09/2008] [Indexed: 11/22/2022] Open
Abstract
Sigma (σ) receptors, initially described as a subtype of opioid receptors, are now considered unique receptors. Pharmacological studies have distinguished two types of σ receptors, termed σ1 and σ2. Of these two subtypes, the σ1 receptor has been cloned in humans and rodents, and its amino acid sequence shows no homology with other mammalian proteins. Several psychoactive drugs show high to moderate affinity for σ1 receptors, including the antipsychotic haloperidol, the antidepressant drugs fluvoxamine and sertraline, and the psychostimulants cocaine and methamphetamine; in addition, the anticonvulsant drug phenytoin allosterically modulates σ1 receptors. Certain neurosteroids are known to interact with σ1 receptors, and have been proposed to be their endogenous ligands. These receptors are located in the plasma membrane and in subcellular membranes, particularly in the endoplasmic reticulum, where they play a modulatory role in intracellular Ca2+ signaling. Sigma1 receptors also play a modulatory role in the activity of some ion channels and in several neurotransmitter systems, mainly in glutamatergic neurotransmission. In accordance with their widespread modulatory role, σ1 receptor ligands have been proposed to be useful in several therapeutic fields such as amnesic and cognitive deficits, depression and anxiety, schizophrenia, analgesia, and against some effects of drugs of abuse (such as cocaine and methamphetamine). In this review we provide an overview of the present knowledge of σ1 receptors, focussing on σ1 ligand neuropharmacology and the role of σ1 receptors in behavioral animal studies, which have contributed greatly to the potential therapeutic applications of σ1 ligands.
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Affiliation(s)
- E J Cobos
- Department of Pharmacology and Institute of Neuroscience, Faculty of Medicine, University of Granada, Granada, Spain
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Entrena JM, Cobos EJ, Nieto FR, Cendán CM, Gris G, Del Pozo E, Zamanillo D, Baeyens JM. Sigma-1 receptors are essential for capsaicin-induced mechanical hypersensitivity: studies with selective sigma-1 ligands and sigma-1 knockout mice. Pain 2009; 143:252-261. [PMID: 19375855 DOI: 10.1016/j.pain.2009.03.011] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2008] [Revised: 03/05/2009] [Accepted: 03/10/2009] [Indexed: 10/20/2022]
Abstract
We evaluated the role of sigma(1) receptors on capsaicin-induced mechanical hypersensitivity and on nociceptive pain induced by punctate mechanical stimuli, using wild-type and sigma(1) receptor knockout (sigma(1)-KO) mice and selective sigma(1) receptor-acting drugs. Mutation in sigma(1)-KO mice was confirmed by PCR analysis of genomic DNA and, at the protein level, by [(3)H](+)-pentazocine binding assays. Both wild-type and sigma(1)-KO mice not treated with capsaicin showed similar responses to different intensities of mechanical stimuli (0.05-8 g force), ranging from innocuous to noxious, applied to the hind paw. This indicates that sigma(1) gene inactivation does not modify the perception of punctate mechanical stimuli. The intraplantar (i.pl.) administration of capsaicin induced dose-dependent mechanical allodynia in wild-type mice (markedly reducing both the threshold force necessary to induce paw withdrawal and the latency to paw withdrawal induced by a given force). In contrast, capsaicin was completely unable to induce mechanical hypersensitivity in sigma(1)-KO mice. The high-affinity and selective sigma(1) antagonists BD-1063, BD-1047 and NE-100, administered subcutaneously (s.c.), dose-dependently inhibited mechanical allodynia induced by capsaicin (1 microg,i.pl.), yielding ED(50) (mg/kg) values of 15.80+/-0.93, 29.31+/-1.65 and 40.74+/-7.20, respectively. The effects of the sigma(1) antagonists were reversed by the sigma(1) agonist PRE-084 (32 mg/kg, s.c.). None of the drugs tested modified the responses induced by a painful mechanical punctate stimulus (4 g force) in nonsensitized animals. These results suggest that sigma(1) receptors are essential for capsaicin-induced mechanical hypersensitivity, but are not involved in mechanical nociceptive pain.
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Affiliation(s)
- José Manuel Entrena
- Department of Pharmacology and Institute of Neuroscience, Faculty of Medicine, University of Granada, Avenida de Madrid 11, 18012 Granada, Spain Biomedical Research Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, Armilla, 18100 Granada, Spain Laboratorios Dr. Esteve S.A., Avenida Virgen de Montserrat 221, 08041 Barcelona, Spain
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19
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Abstract
Four families of potassium channels with different structures, functional characteristics and pharmacological sensitivity, are distinguished in neurons: voltage-gated (K(v)), calcium-activated (K(Ca)), inward rectifier (K(ir)) and two-pore (K(2P)) K(+) channels. During the last 15 years, numerous studies have demonstrated that the opening of some of these K(+) channels plays an important role in the antinociception induced by agonists of many G-protein-coupled receptors (alpha(2)-adrenoceptors, opioid, GABA(B), muscarinic M(2), adenosine A(1), serotonin 5-HT(1A) and cannabinoid receptors), as well as by other antinociceptive drugs (nonsteroidal antiinflammatory drugs [NSAIDs], tricyclic antidepressants, etc.) and natural products. Several specific types of K(+) channels are involved in antinociception. The most widely studied are the ATP-sensitive K(+) channels (K(ATP)), members of the K(ir) family, which participate in the antinociception induced by many drugs that activate them in both the central and the peripheral nervous system. The opening of G-protein-regulated inwardly rectifying K(+) channels (GIRK or K(ir)3), K(v)1.1 and two types of K(Ca) channels, the small- and large-conductance calcium-activated K(+) channels (SK and BK channels, respectively), also play a role in the antinociceptive effect of different drugs and natural products. Recently, drugs that open K(+) channels by direct activation (such as openers of neuronal K(v)7 and K(ATP) channels) have been shown to produce antinociception in models of acute and chronic pain, which suggests that other neuronal K(+) channels (e.g. K(v)1.4 channels) may represent an interesting target for the development of new K(+) channel openers with antinociceptive effects.
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Affiliation(s)
- María Ocaña
- Department of Pharmacology and Neurosciences Institute, School of Medicine, University of Granada, Avenida de Madrid 12, E-18012 Granada, Spain
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Cendán CM, Pujalte JM, Portillo-Salido E, Montoliu L, Baeyens JM. Formalin-induced pain is reduced in sigma(1) receptor knockout mice. Eur J Pharmacol 2005; 511:73-4. [PMID: 15777781 DOI: 10.1016/j.ejphar.2005.01.036] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2005] [Accepted: 01/28/2005] [Indexed: 11/26/2022]
Abstract
The role of sigma1 receptors in non-acute pain has not been explored. In this study we show that both phases of formalin-induced pain were reduced by approximately 55% in sigma1 receptor knockout mice in comparison to wild-type animals. These results suggest that the tonic pain induced by formalin is altered in mice lacking sigma1 receptors, and highlight the potential usefulness of further studies of the role of sigma1 receptors in models of non-acute pain.
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Affiliation(s)
- Cruz Miguel Cendán
- Department of Pharmacology and Institute of Neurosciences, School of Medicine, University of Granada, Avenida de Madrid 12, 18012 Granada, Spain
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Moncada A, Cendán CM, Baeyens JM, Del Pozo E. Inhibitors of serine/threonine protein phosphatases antagonize the antinociception induced by agonists of alpha 2 adrenoceptors and GABAB but not kappa-opioid receptors in the tail flick test in mice. Pain 2005; 114:212-20. [PMID: 15733647 DOI: 10.1016/j.pain.2004.12.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2004] [Revised: 12/01/2004] [Accepted: 12/13/2004] [Indexed: 11/22/2022]
Abstract
We previously reported that serine/threonine protein phosphatases (PPs) play a role in the antinociception induced by the mu-opioid receptor agonist morphine. In this study we evaluated the possible involvement of PPs on the antinociception induced by agonists of others G protein-coupled receptors in the tail flick test in mice. The subcutaneous administration of clonidine (0.25-4 mg/kg), baclofen (2-32 mg/kg) or U50,488H (2-16 mg/kg) (agonists of alpha(2) adrenoceptors, GABA(B) and kappa-opioid receptors, respectively) produced dose-dependent antinociception. The antinociceptive effects of clonidine and baclofen were antagonized in a dose-dependent way by the protein phosphatase inhibitors okadaic acid (0.001-10 pg/mouse, i.c.v.) and cantharidin (0.001-10 ng/mouse, i.c.v.), and okadaic acid was 1000 times more potent than cantharidin in producing this effect. The effects of these drugs appear to be specifically due to the blockade of PPs, since L-norokadaone (an analogue of okadaic acid that has no effect on PPs) did not modify clonidine- or baclofen-induced antinociception over the wide range of doses used (0.001-1000 pg/mouse, i.c.v.). On the other hand, the antinociception induced by activation of kappa-opioid receptors with U50,488H was not modified by okadaic acid or cantharidin. In conclusion, our data support the idea that serine/threonine PPs are differentially involved in the antinociceptive effects of several agonists of G protein-coupled receptors in mice.
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Affiliation(s)
- Ana Moncada
- Department of Pharmacology and Neurosciences Institute, School of Medicine, University of Granada, Avenida de Madrid 12, E-18012 Granada, Spain
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22
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Moncada A, Cendán CM, Baeyens JM, Del Pozo E. Effects of serine/threonine protein phosphatase inhibitors on morphine-induced antinociception in the tail flick test in mice. Eur J Pharmacol 2003; 465:53-60. [PMID: 12650833 DOI: 10.1016/s0014-2999(03)01461-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study was to evaluate the effects of serine/threonine protein phosphatase (PP) inhibitors on morphine-induced antinociception in the tail flick test in mice, and on [3H]naloxone binding to the forebrain crude synaptosome fraction. Neither okadaic acid nor cantharidin (1-10000 nM) displaced [3H]naloxone from its specific binding sites, which indicates that they do not interact at the opioid receptor level. The i.c.v. administration of very low doses of okadaic acid (0.001-1 pg/mouse) and cantharidin (0.001-1 ng/mouse), which inhibit PP2A, produced a dose-dependent antagonism of the antinociception induced by morphine (s.c.). However, L-nor-okadaone (0.001 pg/mouse-1 ng/mouse, i.c.v.), an analogue of okadaic acid lacking activity against protein phosphatases, did not affect the antinociceptive effect of morphine. On the other hand, high doses of okadaic acid (10 ng/mouse, i.c.v.) and cantharidin (1 microg/mouse, i.c.v.), which also block PP1, and calyculin-A (0.1 fg/mouse-1 ng/mouse, i.c.v.), which inhibits equally both PP1 and PP2A, did not modify the morphine-induced antinociception. These results suggest that the activation of type 2A serine/threonine protein phosphatases may play a role in the antinociceptive effect of morphine, and that PP1 might counterbalace this activity.
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Affiliation(s)
- Ana Moncada
- Department of Pharmacology and Neuroscience Institute, Medical School, University of Granada, Avenida de Madrid 11, 18012 Granada, Spain
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