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de Oliveira RP, Yokoyama T, Cardoso Thomaz LDS, de Andrade JS, Santos ADA, de Carvalho Mendonça V, Rosentock T, Carrera M, Medeiros P, Cruz FC, Coimbra NC, Silva RCB. Prepulse inhibition of the acoustic startle reflex impairment by 5-HT2A receptor activation in the inferior colliculusis prevented by GABAA receptor blockade in the pedunculopontine tegmental nucleus. Behav Brain Res 2023; 448:114436. [PMID: 37061200 DOI: 10.1016/j.bbr.2023.114436] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 04/10/2023] [Accepted: 04/10/2023] [Indexed: 04/17/2023]
Abstract
The relationship between serotonin dysfunction and schizophrenia commenced with the discovery of the effects of lysergic acid diethylamide (LSD) that has high affinity for 5-HT2A receptors. Activation of these receptors produces perceptual and behavioural changes such as illusions, visual hallucinations and locomotor hyperactivity. Using prepulse inhibition (PPI) of the acoustic startle, which is impaired in schizophrenia,we aimed to investigate:i) the existence of a direct and potentially inhibitory neural pathway between the inferior colliculus (IC) and the pedunculopontine tegmental nucleus (PPTg) involved in the mediation of PPI responses by a neural tract tracing procedure;ii) if the microinjection of the 5-HT2A receptors agonist DOI in IC would activate neurons in this structure and in the PPTg by a c-Fos protein immunohistochemistry study;iii) whether the deficits in PPI responses, observed after the administration of DOI in the IC, could be prevented by the concomitant microinjection of the GABAA receptor antagonist bicuculline in the PPTg.Male Wistar rats were used in this study. An IC-PPTg reciprocated neuronal pathway was identified by neurotracing. The number of c-Fos labelled cells was lower in the DOI group in IC and PPTg, suggesting that this decrease could be due to the high levels of GABA in both structures. The concomitant microinjections of bicuculline in PPTg and DOI in IC prevented the PPI deficit observed after the IC microinjection of DOI. Ourfindings suggest that IC 5-HT2A receptors may be at least partially involved in the regulation of inhibitory pathways mediating PPI response in IC and PPTg structures.
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Affiliation(s)
- Rodolpho Pereira de Oliveira
- Laboratory of Psychobiology of Schizophrenia, Departmentof Biosciences, Federal University of São Paulo (UNIFESP), Silva Jardim Street 136, Santos, 11015-020, São Paulo, Brazil
| | - Thais Yokoyama
- Department of Pharmacology, - Federal University of São Paulo (UNIFESP), São Paulo-SP, 04023-062, Brazil
| | - Lucas de Santana Cardoso Thomaz
- Laboratory of Psychobiology of Schizophrenia, Departmentof Biosciences, Federal University of São Paulo (UNIFESP), Silva Jardim Street 136, Santos, 11015-020, São Paulo, Brazil
| | - José Simões de Andrade
- Laboratory of Psychobiology of Schizophrenia, Departmentof Biosciences, Federal University of São Paulo (UNIFESP), Silva Jardim Street 136, Santos, 11015-020, São Paulo, Brazil
| | - Alexia Dos Anjos Santos
- Department of Pharmacology, - Federal University of São Paulo (UNIFESP), São Paulo-SP, 04023-062, Brazil
| | - Vinícius de Carvalho Mendonça
- Laboratory of Psychobiology of Schizophrenia, Departmentof Biosciences, Federal University of São Paulo (UNIFESP), Silva Jardim Street 136, Santos, 11015-020, São Paulo, Brazil
| | - Tatiana Rosentock
- Sygnature Discovery, Department of Bioscience, BioCity, Pennyfoot Street, Nottingham, NG1 1GR, United Kingdom
| | - Marinete Carrera
- Behavioral Pharmacology Group, Laboratory of Animal Morphology and Pathology, State University of North Fluminense Darcy Ribeiro, Avenida Alberto Lamego, 2000, Campos dos Goytacazes, 28013-602, RJ, Brazil
| | - Priscila Medeiros
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, RibeirãoPreto Medical School of the Univertsity of São Paulo (FMRP-USP), Av. Bandeirantes, 30900, RibeirãoPreto, 14049-900, São Paulo, Brazil; Laboratory of Neurosciences of Pain & Emotion, Department of Surgery and Anatomy, FMRP-USP, Av. Bandeirantes, 3900, Ribeirão Preto, 14049-900, São Paulo, Brazil; InstituteofNeuroscienceandBehavior (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, 14050-220, São Paulo, Brazil; Interdisciplinary Center for PainCare, Federal Universityof São Carlos (UFSCar), Universidade Federal de São Carlos, Rodovia Washington Luiz, Km 235, Caixa Postal 676, CEP 13565-905, SP, Brazil; Department of General and Specialized Nursing - EERP/USP RibeirãoPreto College of Nursing - USP
| | - Fábio Cardoso Cruz
- Department of Pharmacology, - Federal University of São Paulo (UNIFESP), São Paulo-SP, 04023-062, Brazil
| | - Norberto Cysne Coimbra
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, RibeirãoPreto Medical School of the Univertsity of São Paulo (FMRP-USP), Av. Bandeirantes, 30900, RibeirãoPreto, 14049-900, São Paulo, Brazil; Laboratory of Neurosciences of Pain & Emotion, Department of Surgery and Anatomy, FMRP-USP, Av. Bandeirantes, 3900, Ribeirão Preto, 14049-900, São Paulo, Brazil; InstituteofNeuroscienceandBehavior (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, 14050-220, São Paulo, Brazil
| | - Regina Cláudia Barbosa Silva
- Laboratory of Psychobiology of Schizophrenia, Departmentof Biosciences, Federal University of São Paulo (UNIFESP), Silva Jardim Street 136, Santos, 11015-020, São Paulo, Brazil; InstituteofNeuroscienceandBehavior (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, 14050-220, São Paulo, Brazil.
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da Silva JA, Almada RC, Falconi-Sobrinho LL, Pigatto GR, Hernandes PM, Coimbra NC. Neostriatum neuronal TRPV(1)-signalling mediates striatal anandamide at high concentration facilitatory influence on neostriato-nigral dishinhibitory GABAergic connections. Brain Res Bull 2023; 192:128-41. [PMID: 36414159 DOI: 10.1016/j.brainresbull.2022.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 11/14/2022] [Accepted: 11/17/2022] [Indexed: 11/21/2022]
Abstract
RATIONALE Several lines of evidence have demonstrated that the cannabinoid type 1 receptor (CB1) is found in the caudate nucleus and putamen (CPu) in addition to the substantia nigra pars reticulata (SNpr). Here, we investigated the role of endocannabinoid neuromodulation of striato-nigral disinhibitory projections on the activity of nigro-collicular GABAergic pathways that control the expression of unconditioned fear-related behavioural responses elicited by microinjections of the GABAA receptor selective antagonist bicuculline (BIC) in the deep layers of the superior colliculus (dlSC). METHODS Fluorescent neural tract tracers were deposited in either CPu or in SNpr. Wistar rats received injection of vehicle, anandamide (AEA), either at low (50 pmol) or high (100 pmol) concentrations in CPu followed by bicuculline microinjections in dlSC. RESULTS Connections between CPu, the SNpr and dlSC were demonstrated. The GABAA receptor blockade in dlSC elicited panic-like behaviour. AEA at the lowest concentration caused a panicolytic-like effect that was antagonised by the CPu pretreatment with AM251 at 100 pmol. AEA at the highest concentration caused a panicogenic-like effect that was antagonised by the CPu pretreatment with 6-iodonordihydrocapsaicin (6-I-CPS) at different concentrations (0.6, 6, 60 nmol). CONCLUSION These findings suggest that while pre-synaptic CB1-signalling subserves an indirect facilitatory effect of AEA on striato-nigral pathways causing panicolytic-like responses through midbrain tectum enhanced activity, post-synaptic TRPV1-signalling in CPu mediates AEA direct activation of striato-nigral disinhibitory pathways resulting in increasing dlSC neurons activity and a panicogenic-like response. All these actions seem to depend on the interface with the nigro-collicular inhibitory GABAergic pathways.
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Almada RC, Falconi-Sobrinho LL, da Silva JA, Wotjak CT, Coimbra NC. Augmented anandamide signalling in the substantia nigra pars reticulata mediates panicolytic-like effects in mice confronted by Crotalus durissus terrificus pit vipers. Psychopharmacology (Berl) 2022; 239:2753-2769. [PMID: 35650304 DOI: 10.1007/s00213-022-06127-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 03/26/2022] [Indexed: 12/30/2022]
Abstract
RATIONALE The endocannabinoid modulation of fear and anxiety due to the on-demand synthesis and degradation is supported by a large body of research. Although it has been proposed that anandamide (AEA) in the substantia nigra pars reticulata (SNpr) seems to be important for the organisation of innate fear-related behaviours, a role for endogenous AEA has yet to be clarified. METHODS Mice were treated with the fatty acid amide hydrolase (FAAH) selective inhibitor URB597 at different concentrations (0.01, 0.1, 1 nmol/0.1 µL) in the SNpr and confronted by rattlesnakes (Crotalus durissus terrificus). The most effective dose of URB597 (1 nmol) was also preceded by microinjections of the CB1 receptor antagonist AM251 (0.1 nmol) into the SNpr, and mice were then confronted by the venomous snake. RESULTS URB597 (0.1 and 1 nmol) in the SNpr decreased the expression of defensive behaviours such as defensive attention, escape, and time spent inside the burrow of mice confronted by rattlesnakes. Moreover, pretreatment of SNpr with AM251 suppressed these antiaversive effects of URB597 in this midbrain structure. CONCLUSION Overall, these data clearly indicate that the panicolytic consequences of endogenous AEA enhancement in the SNpr are mediated by CB1 receptor signalling.
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Affiliation(s)
- Rafael C Almada
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.,Department of Biological Sciences, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, São Paulo, Brazil
| | - Luiz Luciano Falconi-Sobrinho
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.,Behavioural Neurosciences Institute (INeC), São Paulo, Ribeirão Preto, Brazil.,Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto, São Paulo, Brazil.,NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Juliana A da Silva
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.,Behavioural Neurosciences Institute (INeC), São Paulo, Ribeirão Preto, Brazil
| | - Carsten T Wotjak
- Laboratory of Neuronal Plasticity, Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, Munich, Germany.,Central Nervous System Diseases Research, Boehringer Ingelheim Pharmaceuticals Gesellschaft Mit Beschränkter Haftung & Compagnie Kommanditgesellschaft, Biberach an der Riß, Germany
| | - Norberto C Coimbra
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil. .,Behavioural Neurosciences Institute (INeC), São Paulo, Ribeirão Preto, Brazil. .,Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto, São Paulo, Brazil. .,NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Melo-Thomas L, Tacken L, Richter N, Almeida D, Rapôso C, de Melo SR, Thomas U, de Paiva YB, Medeiros P, Coimbra NC, Schwarting R. Lateralization in hemi-parkinsonian rats is affected by deep brain stimulation or glutamatergic neurotransmission in the inferior colliculus. eNeuro 2022; 9:ENEURO.0076-22.2022. [PMID: 35817565 PMCID: PMC9337613 DOI: 10.1523/eneuro.0076-22.2022] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 04/16/2022] [Accepted: 06/12/2022] [Indexed: 11/21/2022] Open
Abstract
After unilateral lesion of the medial forebrain bundle (MFB) by 6-OHDA rats exhibit lateralized deficits in spontaneous behavior or apomorphine-induced rotations. We investigated whether such lateralization is attenuated by either deep brain stimulation (DBS) or glutamatergic neurotransmission in the inferior colliculus (IC) of Wistar rats. Intracollicular DBS did not affect spontaneous lateralization but attenuated apomorphine-induced rotations. Spontaneous lateralization disappeared after both glutamatergic antagonist MK-801 or the agonist NMDA microinjected in the IC. Apomorphine-induced rotations were potentiated by MK-801 but were not affected by NMDA intracollicular microinjection. After injecting a bidirectional neural tract tracer into the IC, cell bodies and/or axonal fibers were found in the periaqueductal gray, superior colliculus, substantia nigra, cuneiform nucleus and pedunculo-pontine tegmental nucleus, suggesting the involvement of these structures in the motor improvement after IC manipulation. Importantly, the side of the IC microinjection regarding the lesion (ipsi- or contralateral) is particularly important and this effect may not involve the neostriatum directly.Significance StatementThe inferior colliculus, usually viewed as an auditory structure, when properly manipulated may counteract motor deficits in Parkinsonian rats. Indeed, the present study showed that 30 Hz deep brain stimulation or glutamatergic neural network in the inferior colliculus reduced body asymmetry induced by medial forebrain bundle unilateral 6-OHDA lesion in rats, an animal model of Parkinsonism. Understanding how glutamatergic mechanisms in the inferior colliculus influence motor control, classically attributed to the basal nuclei circuitry, could be useful in the development of new therapeutics to treat Parkinson's disease and other motor disorders.
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Affiliation(s)
- Liana Melo-Thomas
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, D-35032, Marburg, Germany.
- Center for Mind, Brain, and Behavior (CMBB), Hans-Meerwein-Straße 6, 35032, Marburg, Germany
- Behavioral Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, 14050-220, São Paulo, Brazil
| | - Lars Tacken
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, D-35032, Marburg, Germany
| | - Nicole Richter
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, D-35032, Marburg, Germany
| | - Davina Almeida
- Laboratory of Drug Development, Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, São Paulo, 13083-865, Brazil
| | - Catarina Rapôso
- Laboratory of Drug Development, Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, São Paulo, 13083-865, Brazil
| | - Silvana Regina de Melo
- Department of Morphological Sciences, State University of Maringá, Av. Colombo, 5790, 87020-900, Maringá, Paraná, Brazil
| | - Uwe Thomas
- Thomas RECORDING GmbH, Winchester Strasse 8, 35394 Giessen, Germany
| | - Yara Bezerra de Paiva
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto (SP), 14049-900, Brazil
| | - Priscila Medeiros
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto (SP), 14049-900, Brazil
- Laboratory of Neurosciences of Pain & Emotions and Multi-User Centre of Neuroelectrophysiology, Department of Surgery and Anatomy, Ribeirão Preto Medical School of the University of São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto (SP), 14049-900, Brazil
| | - Norberto C Coimbra
- Behavioral Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, 14050-220, São Paulo, Brazil
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto (SP), 14049-900, Brazil
- NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), 14049-900, Brazil
| | - Rainer Schwarting
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, D-35032, Marburg, Germany
- Center for Mind, Brain, and Behavior (CMBB), Hans-Meerwein-Straße 6, 35032, Marburg, Germany
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Almada RC, Dos Anjos-Garcia T, da Silva JA, Pigatto GR, Wotjak CT, Coimbra NC. The modulation of striatonigral and nigrotectal pathways by CB1 signalling in the substantia nigra pars reticulata regulates panic elicited in mice by urutu-cruzeiro lancehead pit vipers. Behav Brain Res 2020; 401:112996. [PMID: 33171147 DOI: 10.1016/j.bbr.2020.112996] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 10/28/2020] [Accepted: 10/30/2020] [Indexed: 01/08/2023]
Abstract
Cannabinoid receptor type 1 (CB1R) is widely distributed in the substantia nigra pars reticulata (SNpr). However, the role of CB1R at the SNpr level in threatening situations is poorly understood. We investigated the role of CB1R in the SNpr on the expression of fear responses in mice confronted with urutu-cruzeiro pit vipers. First, a bidirectional neurotracer was injected into the SNpr; then, immunostaining of the vesicular GABA transporter was conducted at the levels of the striatum (CPu) and deep layers of the superior colliculus (dlSC). In addition, CB1R immunostaining and GABA labelling were performed in the SNpr. Using a prey-versus-snake paradigm, mice were pretreated with the CB1R antagonist AM251 (100 pmol) and treated with the endocannabinoid anandamide (AEA, 5 pmol) in the SNpr, followed by bicuculline (40 ng) in the dlSC, and were then confronted with a snake. Bidirectional neural tract tracers associated with immunofluorescence showed the GABAergic striatonigral disinhibitory and nigrotectal inhibitory pathways. Furthermore, we showed that CB1R labelling was restricted to axonal fibres surrounding SNpr GABAergic cells. We also demonstrated a decrease in the defensive behaviours of mice treated with AEA in the SNpr, but this effect was blocked by pre-treatment with AM251 in this structure. Taken together, our results show that the panicolytic consequences of the AEA enhancement in the SNpr are signalled by CB1R, suggesting that CB1R localised in axon terminals of CPu GABAergic neurons in the SNpr modulates the activity of the nigrotectal GABAergic pathway during the expression of defensive behaviours in threatening situations.
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Affiliation(s)
- Rafael Carvalho Almada
- School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Department of Pharmacology, Laboratory of Neuroanatomy and Neuropsychobiology, Ribeirão Preto, 14049-900, São Paulo, Brazil; Max Planck Institute of Psychiatry, Department of Stress Neurobiology and Neurogenetics, Laboratory of Neuronal Plasticity, Kraepelinstrasse 2-10, 80804, Munich, Germany; Behavioural Neuroscience Institute (INeC), Av. do Café, 2450, Ribeirão Preto, 14050-220, São Paulo, Brazil; Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto Medical School of the University of São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto, 14049-900, São Paulo, Brazil
| | - Tayllon Dos Anjos-Garcia
- School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Department of Pharmacology, Laboratory of Neuroanatomy and Neuropsychobiology, Ribeirão Preto, 14049-900, São Paulo, Brazil; Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto Medical School of the University of São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto, 14049-900, São Paulo, Brazil
| | - Juliana Almeida da Silva
- School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Department of Pharmacology, Laboratory of Neuroanatomy and Neuropsychobiology, Ribeirão Preto, 14049-900, São Paulo, Brazil; Behavioural Neuroscience Institute (INeC), Av. do Café, 2450, Ribeirão Preto, 14050-220, São Paulo, Brazil
| | - Glauce Regina Pigatto
- School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Department of Pharmacology, Laboratory of Neuroanatomy and Neuropsychobiology, Ribeirão Preto, 14049-900, São Paulo, Brazil
| | - Carsten T Wotjak
- Max Planck Institute of Psychiatry, Department of Stress Neurobiology and Neurogenetics, Laboratory of Neuronal Plasticity, Kraepelinstrasse 2-10, 80804, Munich, Germany
| | - Norberto Cysne Coimbra
- School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Department of Pharmacology, Laboratory of Neuroanatomy and Neuropsychobiology, Ribeirão Preto, 14049-900, São Paulo, Brazil; Behavioural Neuroscience Institute (INeC), Av. do Café, 2450, Ribeirão Preto, 14050-220, São Paulo, Brazil; NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), School of Medicine of Ribeirão Preto of the University of São Paulo, Ribeirão Preto, 14049-900, São Paulo, Brazil; Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto Medical School of the University of São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto, 14049-900, São Paulo, Brazil.
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da Silva JA, Almada RC, de Paiva YB, Coimbra NC. Endocannabinoid neuromodulation in the neostriatum decreases the GABAergic striato-nigral disinhibitory function and increases the nigro-collicular inhibitory pathway activity. J Neural Transm (Vienna) 2020; 127:1199-208. [DOI: 10.1007/s00702-020-02217-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 06/02/2020] [Indexed: 02/06/2023]
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Calvo F, Almada RC, da Silva JA, Medeiros P, da Silva Soares R, de Paiva YB, Roncon CM, Coimbra NC. The Blockade of µ1- and κ-Opioid Receptors in the Inferior Colliculus Decreases the Expression of Panic Attack-Like Behaviours Induced by Chemical Stimulation of the Dorsal Midbrain. Neuropsychobiology 2020; 78:218-228. [PMID: 31514182 DOI: 10.1159/000502439] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 07/22/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Gamma-aminobutyric acid (GABA)ergic and opioid systems play a crucial role in the neural modulation of innate fear organised by the inferior colliculus (IC). In addition, the IC is rich in GABAergic fibres and opioid neurons, which are also connected to other mesencephalic structures, such as the superior colliculus and the substantia nigra. However, the contribution of distinct opioid receptors (ORs) in the IC during the elaboration and expression of innate fear and panic-like responses is unclear. The purpose of the present work was to investigate a possible integrated action exerted by ORs and the GABAA receptor-mediated system in the IC on panic-like responses. METHODS The effect of the blockade of either µ1- or κ-ORs in the IC was evaluated in the unconditioned fear-induced responses elicited by GABAA antagonism with bicuculline. Microinjections of naloxonazine, a µ1-OR antagonist, or nor-binaltorphimine (nor-BNI), a κ-OR antagonist, were made into the IC, followed by intramesencephalic administration of the GABAA-receptor antagonist bicuculline. The defensive behaviours elicited by the treatments in the IC were quantitatively analysed, recording the number of escapes expressed as running (crossing), jumps, and rotations, over a 30-min period in a circular arena. The exploratory behaviour of rearing was also recorded. RESULTS GABAA-receptor blockade with bicuculline in the IC increased defensive behaviours. However, pretreatment of the IC with higher doses (5 µg) of naloxonazine or nor-BNI followed by bicuculline resulted in a significant decrease in unconditioned fear-induced responses. CONCLUSIONS These findings suggest a role played by µ1- and κ-OR-containing connexions and GABAA receptor-mediated neurotransmission on the organisation of panic attack-related responses elaborated by the IC neurons.
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Affiliation(s)
- Fabrício Calvo
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil.,Department of Pharmacology, São Lucas College, Porto Velho, Brazil.,Aparício Carvalho Integrative College (FIMCA), Porto Velho, Brazil
| | - Rafael Carvalho Almada
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil.,Institute of Neuroscience and Behaviour (INeC), Ribeirão Preto, Brazil
| | - Juliana Almeida da Silva
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil.,Institute of Neuroscience and Behaviour (INeC), Ribeirão Preto, Brazil
| | - Priscila Medeiros
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil
| | - Raimundo da Silva Soares
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil
| | - Yara Bezerra de Paiva
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil
| | - Camila Marroni Roncon
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil.,Assis County Educational Foundation (FEMA), Assis, Brazil
| | - Norberto Cysne Coimbra
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil, .,Institute of Neuroscience and Behaviour (INeC), Ribeirão Preto, Brazil, .,NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil,
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de Carvalho MC, Figueiredo RMD, Coimbra NC, Leite-Panissi CRA, de Souza Silva MA, Huston JP, Mattern C, Brandão ML. Intranasal dopamine attenuates fear responses induced by electric shock to the foot and by electrical stimulation of the dorsal periaqueductal gray matter. J Psychopharmacol 2019; 33:1524-1532. [PMID: 31328620 DOI: 10.1177/0269881119862527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE Intranasally applied dopamine (IN-DA), which likely reaches the brain via nasal-brain pathways and bypasses the blood-brain barrier, has been found to increase extracellular DA and bind to the DA2 transporter in the striatum. Recent studies suggest that DA plays a significant role in the processing of signaled and unconditioned aversive stimulation, including evidence that may attenuate responses to painful input. The purpose of this study was to examine the effects of IN-DA on fear-related behaviors induced by electric shock to the foot or by electrical stimulation of the dorsal periaqueductal gray matter (dPAG). METHODS DA hydrochloride suspended in a viscous castor oil gel (1 or 2 mg/kg) was applied (IN-DA) in a volume of 5 μL into the nostrils of adult Wistar male rats in order to evaluate its effects on (a) freezing induced by electric shock to the foot and (b) thresholds of freezing and escape and duration of post-stimulation freezing induced by electrical stimulation of the dPAG. RESULTS IN-DA attenuated freezing induced by electric shock to the foot in the three test trials, indicating that it reduced long-term fear responses. IN-DA also increased the threshold of dPAG stimulation-induced escape responses and reduced post-stimulation freezing. CONCLUSIONS IN-DA, which has previously been shown to facilitate learning and to have antidepressive-like effects, attenuated unconditioned fear responses elicited by peripheral and intramesencephalic (dPAG) stimulation and reduced long-term conditioned fear responses.
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Affiliation(s)
- Milene Cristina de Carvalho
- Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, Brazil.,Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto, Brazil.,NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil
| | - Rebeca Machado de Figueiredo
- Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, Brazil.,Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto, Brazil
| | - Norberto Cysne Coimbra
- Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, Brazil.,Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto, Brazil.,NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil
| | - Christie Ramos Andrade Leite-Panissi
- Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, Brazil.,NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil.,Department of Psychology, Ribeirão Preto School of Philosophy, Science and Literature of the University of São Paulo, Ribeirão Preto, Brazil
| | - Maria Angélica de Souza Silva
- Center for Behavioral Neuroscience, Institute of Experimental Psychology, University of Düsseldorf, Düsseldorf, Germany
| | - Joseph P Huston
- Center for Behavioral Neuroscience, Institute of Experimental Psychology, University of Düsseldorf, Düsseldorf, Germany
| | - Claudia Mattern
- M et P Pharma AG, Emmetten, Switzerland.,Oceanographic Center, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Marcus Lira Brandão
- Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, Brazil.,NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto, Brazil
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Calvo F, Almada RC, Dos Anjos-Garcia T, Falconi-Sobrinho LL, Paschoalin-Maurin T, Bazaglia-de-Sousa G, Medeiros P, Silva JAD, Lobão-Soares B, Coimbra NC. Panicolytic-like effect of µ 1-opioid receptor blockade in the inferior colliculus of prey threatened by Crotalus durissus terrificus pit vipers. J Psychopharmacol 2019; 33:577-588. [PMID: 30663473 DOI: 10.1177/0269881118822078] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND The endogenous opioid peptide system has been implicated in the neural modulation of fear and anxiety organised by the dorsal midbrain. Furthermore, previous results indicate a fundamental role played by inferior colliculus (IC) opioid mechanisms during the expression of defensive behaviours, but the involvement of the IC µ1-opioid receptor in the modulation of anxiety- and panic attack-related behaviours remains unclear. Using a prey-versus-snake confrontation paradigm, we sought to investigate the effects of µ1-opioid receptor blockade in the IC on the defensive behaviour displayed by rats in a dangerous situation. METHODS Specific pathogen-free Wistar rats were treated with microinjection of the selective µ1-opioid receptor antagonist naloxonazine into the IC at different concentrations (1.0, 3.0 and 5.0 µg/0.2 µL) and then confronted with rattlesnakes ( Crotalus durissus terrificus). The defensive behavioural repertoire, such as defensive attention, flat back approach (FBA), startle, defensive immobility, escape or active avoidance, displayed by rats either during the confrontations with wild snakes or during re-exposure to the experimental context without the predator was analysed. RESULTS The blockade of µ1-opioid receptors in the IC decreased the expression of both anxiety-related behaviours (defensive attention, FBA) and panic attack-related responses (startle, defensive immobility and escape) during the confrontation with rattlesnakes. A significant decrease in defensive attention was also recorded during re-exposure of the prey to the experimental apparatus context without the predator. CONCLUSION Taken together, these results suggest that a decrease in µ1-opioid receptor signalling activity within the IC modulates anxiety- and panic attack-related behaviours in dangerous environments.
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Affiliation(s)
- Fabrício Calvo
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,2 Department of Pharmacology, São Lucas College, Porto Velho (RO), Brazil.,3 Aparício Carvalho Integrative College (FIMCA), Porto Velho (RO), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil
| | - Rafael Carvalho Almada
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,5 Behavioural Neurosciences Institute (INeC), Ribeirão Preto (SP), Brazil
| | - Tayllon Dos Anjos-Garcia
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,6 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Luiz Luciano Falconi-Sobrinho
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,5 Behavioural Neurosciences Institute (INeC), Ribeirão Preto (SP), Brazil.,6 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Tatiana Paschoalin-Maurin
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,5 Behavioural Neurosciences Institute (INeC), Ribeirão Preto (SP), Brazil
| | - Guilherme Bazaglia-de-Sousa
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,5 Behavioural Neurosciences Institute (INeC), Ribeirão Preto (SP), Brazil.,6 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Priscila Medeiros
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,5 Behavioural Neurosciences Institute (INeC), Ribeirão Preto (SP), Brazil
| | - Juliana Almeida da Silva
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,5 Behavioural Neurosciences Institute (INeC), Ribeirão Preto (SP), Brazil.,6 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Bruno Lobão-Soares
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,5 Behavioural Neurosciences Institute (INeC), Ribeirão Preto (SP), Brazil.,7 Department of Biophysics and Pharmacology, Federal University of Rio Grande do Norte (UFRN), Natal (RN), Brazil
| | - Norberto Cysne Coimbra
- 1 Department of Pharmacology, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,4 Ophidiarium LNN-FMRP-USP/INeC, University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brasil.,5 Behavioural Neurosciences Institute (INeC), Ribeirão Preto (SP), Brazil.,6 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
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10
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da Silva Soares R, Falconi-Sobrinho LL, dos Anjos-Garcia T, Coimbra NC. 5-Hydroxytryptamine 2A receptors of the dorsal raphe nucleus modulate panic-like behaviours and mediate fear-induced antinociception elicited by neuronal activation in the central nucleus of the inferior colliculus. Behav Brain Res 2019; 357-358:71-81. [DOI: 10.1016/j.bbr.2017.07.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 06/14/2017] [Accepted: 07/15/2017] [Indexed: 12/26/2022]
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11
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Calvo F, Lobão-Soares B, de Freitas RL, Paschoalin-Maurin T, Dos Anjos-Garcia T, Medeiros P, da Silva JA, Lovick TA, Coimbra NC. The endogenous opioid system modulates defensive behavior evoked by Crotalus durissus terrificus: Panicolytic-like effect of intracollicular non-selective opioid receptors blockade. J Psychopharmacol 2019; 33:51-61. [PMID: 30407114 DOI: 10.1177/0269881118806301] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND There is a controversy regarding the key role played by opioid peptide neurotransmission in the modulation of panic-attack-related responses. AIMS Using a prey versus rattlesnakes paradigm, the present work investigated the involvement of the endogenous opioid peptide-mediated system of the inferior colliculus in the modulation of panic attack-related responses. METHODS Wistar rats were pretreated with intracollicular administration of either physiological saline or naloxone at different concentrations and confronted with rattlesnakes ( Crotalus durissus terrificus). The prey versus rattlesnake confrontations were performed in a polygonal arena for snakes. The defensive behaviors displayed by prey (defensive attention, defensive immobility, escape response, flat back approach and startle) were recorded twice: firstly, over a period of 15 min the presence of the predator and a re-exposure was performed 24 h after the confrontation, when animals were exposed to the experimental enclosure without the rattlesnake. RESULTS The intramesencephalic non-specific blockade of opioid receptors with microinjections of naloxone at higher doses decreased both anxiety- (defensive attention and flat back approach) and panic attack-like (defensive immobility and escape) behaviors, evoked in the presence of rattlesnakes and increased non-defensive responses. During the exposure to the experimental context, there was a decrease in duration of defensive attention. CONCLUSIONS These findings suggest a panicolytic-like effect of endogenous opioid receptors antagonism in the inferior colliculus on innate (panic attack) and conditioned (anticipatory anxiety) fear in rats threatened by rattlesnakes.
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Affiliation(s)
- Fabrício Calvo
- 1 Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,3 Department of Pharmacology, São Lucas College, Porto Velho (RO), Brazil.,4 Aparício Carvalho Integrative College, Porto Velho (RO), Brazil.,9 Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Bruno Lobão-Soares
- 1 Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,5 Department of Biophysics and Pharmacology, Federal University of Rio Grande do Norte (UFRN), Natal (RN), Brazil.,6 Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto (SP), Brazil.,9 Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Renato Leonardo de Freitas
- 1 Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,7 Laboratory of Neurobiology of Pain and Emotions and Multi-User Centre of Neuroelectrophysiology, Department of Surgery and Anatomy, Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto (SP), Brazil.,10 Biomedical Sciences Institute, Federal University of Alfenas (UNIFAL-MG), Alfenas (MG), Brazil
| | - Tatiana Paschoalin-Maurin
- 1 Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,6 Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto (SP), Brazil.,9 Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Tayllon Dos Anjos-Garcia
- 1 Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,9 Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Priscila Medeiros
- 1 Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,9 Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Juliana Almeida da Silva
- 1 Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,9 Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
| | - Thelma Anderson Lovick
- 2 School of Physiology, Pharmacology & Neuroscience, University of Bristol, Bristol, UK.,6 Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto (SP), Brazil
| | - Norberto Cysne Coimbra
- 1 Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,6 Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto (SP), Brazil.,7 Laboratory of Neurobiology of Pain and Emotions and Multi-User Centre of Neuroelectrophysiology, Department of Surgery and Anatomy, Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto (SP), Brazil.,8 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil.,9 Ophidiarium LNN-FMRP-USP/INeC, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Ribeirão Preto (SP), Brazil
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12
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da Silva JA, Almada RC, de Figueiredo RM, Coimbra NC. Blockade of synaptic activity in the neostriatum and activation of striatal efferent pathways produce opposite effects on panic attack-like defensive behaviours evoked by GABAergic disinhibition in the deep layers of the superior colliculus. Physiol Behav 2018; 196:104-11. [DOI: 10.1016/j.physbeh.2018.07.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/19/2018] [Accepted: 07/24/2018] [Indexed: 12/15/2022]
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13
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Almada RC, Genewsky AJ, Heinz DE, Kaplick PM, Coimbra NC, Wotjak CT. Stimulation of the Nigrotectal Pathway at the Level of the Superior Colliculus Reduces Threat Recognition and Causes a Shift From Avoidance to Approach Behavior. Front Neural Circuits 2018; 12:36. [PMID: 29867370 PMCID: PMC5949341 DOI: 10.3389/fncir.2018.00036] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [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: 02/12/2018] [Accepted: 04/17/2018] [Indexed: 01/14/2023] Open
Abstract
Defensive behavioral responses are essential for survival in threating situations. The superior colliculus (SC) has been implicated in the generation of defensive behaviors elicited by visual, tactile and auditory stimuli. Furthermore, substantia nigra pars reticulata (SNr) neurons are known to exert a modulatory effect on midbrain tectum neural substrates. However, the functional role of this nigrotectal pathway in threating situations is still poorly understood. Using optogenetics in freely behaving mice, we activated SNr projections at the level of the SC, and assessed consequences on behavioral performance in an open field test (OFT) and the beetle mania task (BMT). The latter confronts a mouse with an erratic moving robo-beetle and allows to measure active and passive defensive responses upon frequent encounter of the threatening object. Channelrhodopsin-2 (ChR2)-mediated activation of the inhibitory nigrotectal pathway did not affect anxiety-like and exploratory behavior in the OFT, but increased the number of contacts between robo-beetle and test mouse in the BMT. Depending on the size of the arena, active avoidance responses were reduced, whereas tolerance and close following of the robo-beetle were significantly increased. We conclude from the data that the nigrotectal pathway plays holds the potential to modulate innate fear by attenuating threat recognition and causing a shift from defensive to approach behavior.
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Affiliation(s)
- Rafael C Almada
- Department of Stress Neurobiology and Neurogenetics, Neuronal Plasticity, Max Planck Institute of Psychiatry, Munich, Germany.,Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School (FMRP), University of São Paulo (USP), São Paulo, Brazil.,Behavioral Neurosciences Institute (INeC), São Paulo, Brazil
| | - Andreas J Genewsky
- Department of Stress Neurobiology and Neurogenetics, Neuronal Plasticity, Max Planck Institute of Psychiatry, Munich, Germany
| | - Daniel E Heinz
- Department of Stress Neurobiology and Neurogenetics, Neuronal Plasticity, Max Planck Institute of Psychiatry, Munich, Germany.,Neuroscience Master's Program, Interdisciplinary Center for Neurosciences (IZN), Heidelberg University, Heidelberg, Germany
| | - Paul M Kaplick
- Department of Stress Neurobiology and Neurogenetics, Neuronal Plasticity, Max Planck Institute of Psychiatry, Munich, Germany
| | - Norberto C Coimbra
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto Medical School (FMRP), University of São Paulo (USP), São Paulo, Brazil.,Behavioral Neurosciences Institute (INeC), São Paulo, Brazil.,NAP-USP-Neurobiology of Emotions Research Center (NuPNE), Ribeirão Preto Medical School (FMRP), University of São Paulo (USP), São Paulo, Brazil
| | - Carsten T Wotjak
- Department of Stress Neurobiology and Neurogenetics, Neuronal Plasticity, Max Planck Institute of Psychiatry, Munich, Germany
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Melo-Thomas L, Gil-Martínez AL, Cuenca L, Estrada C, Gonzalez-Cuello A, Schwarting RK, Herrero MT. Electrical stimulation or MK-801 in the inferior colliculus improve motor deficits in MPTP-treated mice. Neurotoxicology 2018; 65:38-43. [PMID: 29366825 DOI: 10.1016/j.neuro.2018.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 10/17/2017] [Revised: 01/16/2018] [Accepted: 01/17/2018] [Indexed: 12/31/2022]
Abstract
The inferior colliculus (IC) is an important midbrain relay station for the integration of descending and ascending auditory information. Additionally, the IC has been implicated in processing sensorimotor responses. Glutamatergic and GABAergic manipulations in the IC can improve motor deficits as demonstrated by the animal model of haloperidol-induced catalepsy. However, how the IC influences motor function remains unclear. We investigated the effects of either intracollicular deep brain stimulation (DBS) or microinjection of the glutamatergic antagonist MK-801 or the agonist NMDA in C57BL/6J mice chronically treated with saline or 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). After DBS or microinjections, the mice were submitted to rotarod and open field tests, respectively. DBS in the IC was effective to increase the time spent on the rotarod in MPTP-treated mice. After unilateral microinjection of MK-801, but not NMDA, MPTP-treated mice increased the distance travelled in the open field (p < 0.05). In conclusion, intracollicular DBS or MK-801 microinjection can improve motor performance in parkinsonian mice suggesting the IC as a new and non-conventional therapeutic target in motor impairment.
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Affiliation(s)
- L Melo-Thomas
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, 35032, Marburg, Germany; Instituto de Neurociências & Comportamento - INEC, Campus USP, Ribeirão Preto, SP, 14040-901, Brazil; Marburg Center for Mind, Brain, and Behavior (MCMBB), Hans-Meerwein-Straße 6, 35032 Marburg, Germany.
| | - A L Gil-Martínez
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain
| | - L Cuenca
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain
| | - C Estrada
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain
| | - A Gonzalez-Cuello
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain
| | - R K Schwarting
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, 35032, Marburg, Germany; Instituto de Neurociências & Comportamento - INEC, Campus USP, Ribeirão Preto, SP, 14040-901, Brazil
| | - M T Herrero
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain.
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Paschoalin-Maurin T, dos Anjos-Garcia T, Falconi-Sobrinho LL, de Freitas RL, Coimbra JPC, Laure CJ, Coimbra NC. The Rodent-versus-wild Snake Paradigm as a Model for Studying Anxiety- and Panic-like Behaviors: Face, Construct and Predictive Validities. Neuroscience 2018; 369:336-349. [DOI: 10.1016/j.neuroscience.2017.11.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 11/09/2017] [Accepted: 11/17/2017] [Indexed: 12/22/2022]
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16
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da Silva JA, Biagioni AF, Almada RC, de Freitas RL, Coimbra NC. Panicolytic-like effects caused by substantia nigra pars reticulata pretreatment with low doses of endomorphin-1 and high doses of CTOP or the NOP receptors antagonist JTC-801 in male Rattus norvegicus. Psychopharmacology (Berl) 2017; 234:3009-3025. [PMID: 28856406 DOI: 10.1007/s00213-017-4678-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 06/20/2017] [Indexed: 12/22/2022]
Abstract
RATIONALE Gamma-aminobutyric acid (GABA)ergic neurons of the substantia nigra pars reticulata (SNpr) are connected to the deep layers of the superior colliculus (dlSC). The dlSC, in turn, connect with the SNpr through opioid projections. Nociceptin/orphanin FQ peptide (N/OFQ) is a natural ligand of a Gi protein-coupled nociceptin receptor (ORL1; NOP) that is also found in the SNpr. Our hypothesis is that tectonigral opioid pathways and intranigral orphanin-mediated mechanisms modulate GABAergic nigrotectal connections. OBJECTIVES Therefore, the aim of this work was to study the role of opioid and NOP receptors in the SNpr during the modulation of defence reactions organised by the dlSC. METHODS The SNpr was pretreated with either opioid or NOP receptor agonists and antagonists, followed by dlSC treatment with bicuculline. RESULTS Blockade of GABAA receptors in the dlSC elicited fear-related defensive behaviour. Pretreatment of the SNpr with naloxone benzoylhydrazone (NalBzoH), a μ-, δ-, and κ1-opioid receptor antagonist as well as a NOP receptor antagonist, decreased the aversive effect of bicuculline treatment on the dlSC. Either μ-opioid receptor activation or blockade by SNpr microinjection of endomorphin-1 (EM-1) and CTOP promoted pro-aversive and anti-aversive actions, respectively, that modulated the defensive responses elicited by bicuculline injection into the dlSC. Pretreatment of the SNpr with the selective NOP receptor antagonist JTC801 decreased the aversive effect of bicuculline, and microinjections of the selective NOP receptor agonist NNC 63-0532 promoted the opposite effect. CONCLUSIONS These results demonstrate that opioid pathways and orphanin-mediated mechanisms have a critical role in modulating the activity of nigrotectal GABAergic pathways during the organisation of defensive behaviours.
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Affiliation(s)
- Juliana Almeida da Silva
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
- Behavioural Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, São Paulo, 14050-220, Brazil
| | - Audrey Franceschi Biagioni
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Rafael Carvalho Almada
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
- Behavioural Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, São Paulo, 14050-220, Brazil
| | - Renato Leonardo de Freitas
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
- Behavioural Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, São Paulo, 14050-220, Brazil
- Multiuser Centre of Neuroelectrophysiology, Department of Anatomy and Surgery, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
- Laboratory of Pain and Emotions, Department of Anatomy and Surgery, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Norberto Cysne Coimbra
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
- Behavioural Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto, São Paulo, 14050-220, Brazil.
- NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), Ribeirão Preto Medical School of the University of São Paulo, Av Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
- Multiuser Centre of Neuroelectrophysiology, Department of Anatomy and Surgery, Ribeirão Preto Medical School of the University of São Paulo (FMRP-USP), Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
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Coimbra NC, Calvo F, Almada RC, Freitas RL, Paschoalin-Maurin T, dos Anjos-Garcia T, Elias-Filho DH, Ubiali WA, Lobão-Soares B, Tracey I. Opioid neurotransmission modulates defensive behavior and fear-induced antinociception in dangerous environments. Neuroscience 2017; 354:178-195. [DOI: 10.1016/j.neuroscience.2017.04.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 04/18/2017] [Accepted: 04/19/2017] [Indexed: 10/19/2022]
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Roncon CM, Yamashita PSDM, Frias AT, Audi EA, Graeff FG, Coimbra NC, Zangrossi H. μ-Opioid and 5-HT1A receptors in the dorsomedial hypothalamus interact for the regulation of panic-related defensive responses. J Psychopharmacol 2017; 31:715-721. [PMID: 28583050 DOI: 10.1177/0269881117693747] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The dorsomedial hypothalamus (DMH) and the dorsal periaqueductal gray (DPAG) have been implicated in the genesis and regulation of panic-related defensive behaviors, such as escape. Previous results point to an interaction between serotonergic and opioidergic systems within the DPAG to inhibit escape, involving µ-opioid and 5-HT1A receptors (5-HT1AR). In the present study we explore this interaction in the DMH, using escape elicited by electrical stimulation of this area as a panic attack index. The obtained results show that intra-DMH administration of the non-selective opioid receptor antagonist naloxone (0.5 nmol) prevented the panicolytic-like effect of a local injection of serotonin (20 nmol). Pretreatment with the selective μ-opioid receptor (MOR) antagonist CTOP (1 nmol) blocked the panicolytic-like effect of the 5-HT1AR agonist 8-OHDPAT (8 nmol). Intra-DMH injection of the selective MOR agonist DAMGO (0.3 nmol) also inhibited escape behavior, and a previous injection of the 5-HT1AR antagonist WAY-100635 (0.37 nmol) counteracted this panicolytic-like effect. These results offer the first evidence that serotonergic and opioidergic systems work together within the DMH to inhibit panic-like behavior through an interaction between µ-opioid and 5-HT1A receptors, as previously described in the DPAG.
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Affiliation(s)
- Camila Marroni Roncon
- 1 Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Paula Shimene de Melo Yamashita
- 1 Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.,2 Department of Integrative Physiology and Center for Neuroscience, University of Colorado, Boulder, CO, USA
| | - Alana Tercino Frias
- 1 Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Elisabeth Aparecida Audi
- 3 Laboratory of Psychopharmacology, Department of Pharmacology and Therapeutics, State University of Maringá, Maringá, Paraná, Brazil
| | - Frederico Guilherme Graeff
- 4 Behavioural Neurosciences Institute (INeC), Ribeirão Preto, São Paulo, Brazil.,5 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), FMRP-USP, Ribeirão Preto, São Paulo, Brazil
| | - Norberto Cysne Coimbra
- 1 Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.,4 Behavioural Neurosciences Institute (INeC), Ribeirão Preto, São Paulo, Brazil.,5 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), FMRP-USP, Ribeirão Preto, São Paulo, Brazil
| | - Helio Zangrossi
- 1 Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.,4 Behavioural Neurosciences Institute (INeC), Ribeirão Preto, São Paulo, Brazil.,5 NAP-USP-Neurobiology of Emotions Research Centre (NuPNE), FMRP-USP, Ribeirão Preto, São Paulo, Brazil
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de Oliveira RP, Nagaishi KY, Barbosa Silva RC. Atypical antipsychotic clozapine reversed deficit on prepulse inhibition of the acoustic startle reflex produced by microinjection of DOI into the inferior colliculus in rats. Behav Brain Res 2017; 325:72-78. [DOI: 10.1016/j.bbr.2017.01.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 01/20/2017] [Accepted: 01/25/2017] [Indexed: 01/23/2023]
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Coimbra NC, Paschoalin-Maurin T, Bassi GS, Kanashiro A, Biagioni AF, Felippotti TT, Elias-Filho DH, Mendes-Gomes J, Cysne-Coimbra JP, Almada RC, Lobão-Soares B. Critical neuropsychobiological analysis of panic attack- and anticipatory anxiety-like behaviors in rodents confronted with snakes in polygonal arenas and complex labyrinths: a comparison to the elevated plus- and T-maze behavioral tests. ACTA ACUST UNITED AC 2017; 39:72-83. [PMID: 28177062 PMCID: PMC7112733 DOI: 10.1590/1516-4446-2015-1895] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 04/04/2016] [Indexed: 01/02/2023]
Abstract
Objective: To compare prey and snake paradigms performed in complex environments to the elevated plus-maze (EPM) and T-maze (ETM) tests for the study of panic attack- and anticipatory anxiety-like behaviors in rodents. Methods: PubMed was reviewed in search of articles focusing on the plus maze test, EPM, and ETM, as well as on defensive behaviors displayed by threatened rodents. In addition, the authors' research with polygonal arenas and complex labyrinth (designed by the first author for confrontation between snakes and small rodents) was examined. Results: The EPM and ETM tests evoke anxiety/fear-related defensive responses that are pharmacologically validated, whereas the confrontation between rodents and snakes in polygonal arenas with or without shelters or in the complex labyrinth offers ethological conditions for studying more complex defensive behaviors and the effects of anxiolytic and panicolytic drugs. Prey vs. predator paradigms also allow discrimination between non-oriented and oriented escape behavior. Conclusions: Both EPM and ETM simple labyrinths are excellent apparatuses for the study of anxiety- and instinctive fear-related responses, respectively. The confrontation between rodents and snakes in polygonal arenas, however, offers a more ethological environment for addressing both unconditioned and conditioned fear-induced behaviors and the effects of anxiolytic and panicolytic drugs.
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Affiliation(s)
- Norberto C Coimbra
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, SP, Brazil.,Núcleo de Pesquisa em Neurobiologia das Emoções (NAP-USP-NuPNE), FMRP, USP, Ribeirão Preto, SP, Brazil
| | - Tatiana Paschoalin-Maurin
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,Núcleo de Pesquisa em Neurobiologia das Emoções (NAP-USP-NuPNE), FMRP, USP, Ribeirão Preto, SP, Brazil
| | - Gabriel S Bassi
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Alexandre Kanashiro
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Audrey F Biagioni
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,Núcleo de Pesquisa em Neurobiologia das Emoções (NAP-USP-NuPNE), FMRP, USP, Ribeirão Preto, SP, Brazil
| | - Tatiana T Felippotti
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, SP, Brazil
| | - Daoud H Elias-Filho
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, SP, Brazil
| | - Joyce Mendes-Gomes
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, SP, Brazil.,Núcleo de Pesquisa em Neurobiologia das Emoções (NAP-USP-NuPNE), FMRP, USP, Ribeirão Preto, SP, Brazil
| | - Jade P Cysne-Coimbra
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Rafael C Almada
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,Instituto de Neurociências e Comportamento (INeC), Ribeirão Preto, SP, Brazil.,Núcleo de Pesquisa em Neurobiologia das Emoções (NAP-USP-NuPNE), FMRP, USP, Ribeirão Preto, SP, Brazil
| | - Bruno Lobão-Soares
- Laboratório de Neuroanatomia e Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,Departamento de Biofísica e Farmacologia, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil
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Ullah F, dos Anjos-Garcia T, Mendes-Gomes J, Elias-Filho DH, Falconi-Sobrinho LL, Freitas RLD, Khan AU, Oliveira RD, Coimbra NC. Connexions between the dorsomedial division of the ventromedial hypothalamus and the dorsal periaqueductal grey matter are critical in the elaboration of hypothalamically mediated panic-like behaviour. Behav Brain Res 2017; 319:135-147. [DOI: 10.1016/j.bbr.2016.11.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/08/2016] [Accepted: 11/13/2016] [Indexed: 01/20/2023]
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Falconi-Sobrinho LL, Dos Anjos-Garcia T, Elias-Filho DH, Coimbra NC. Unravelling cortico-hypothalamic pathways regulating unconditioned fear-induced antinociception and defensive behaviours. Neuropharmacology 2017; 113:367-85. [PMID: 27717879 DOI: 10.1016/j.neuropharm.2016.10.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 09/26/2016] [Accepted: 10/01/2016] [Indexed: 12/30/2022]
Abstract
The medial prefrontal cortex can influence unconditioned fear-induced defensive mechanisms organised by diencephalic neurons that are under tonic GABAergic inhibition. The posterior hypothalamus (PH) is involved with anxiety- and panic attack-like responses. To understand this cortical mediation, our study characterised anterior cingulate cortex (ACC)-PH pathways and investigated the effect of ACC local inactivation with lidocaine. We also investigated the involvement of PH ionotropic glutamate receptors in the defensive behaviours and fear-induced antinociception by microinjecting NBQX (an AMPA/kainate receptor antagonist) and LY235959 (a NMDA receptor antagonist) into the PH. ACC pretreatment with lidocaine decreased the proaversive effect and antinociception evoked by GABAA receptor blockade in the PH, which suggests that there may be descending excitatory pathways from this cortical region to the PH. Microinjections of both NBQX and LY235959 into the PH also attenuated defensive and antinociceptive responses. This suggests that the blockade of AMPA/kainate and NMDA receptors reduces the activity of glutamatergic efferent pathways. Both inputs from the ACC to the PH and glutamatergic hypothalamic short links disinhibited by intra-hypothalamic GABAA receptors blockade are potentially implicated. Microinjection of a bidirectional neurotracer in the PH showed a Cg1-PH pathway and PH neuronal reciprocal connections with the periaqueductal grey matter. Microinjections of an antegrade neurotracer into the Cg1 showed axonal fibres and glutamatergic vesicle-immunoreactive terminal boutons surrounding both mediorostral-lateroposterior thalamic nucleus and PH neuronal perikarya. These data suggest a critical role played by ACC-PH glutamatergic pathways and AMPA/kainate and NMDA receptors in the panic attack-like reactions and antinociception organised by PH neurons.
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de Freitas RL, Medeiros P, Khan AU, Coimbra NC. µ1-Opioid receptors in the dorsomedial and ventrolateral columns of the periaqueductal grey matter are critical for the enhancement of post-ictal antinociception. Synapse 2016; 70:519-530. [DOI: 10.1002/syn.21926] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 08/03/2016] [Accepted: 08/04/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Renato Leonardo de Freitas
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology; Ribeirão Preto Medical School of the University of São Paulo (USP); Av. Bandeirantes, 3900 Ribeirão Preto São Paulo 14049-900 Brazil
- Department of Surgery and Anatomy, Multiuser Centre of Neurophysiology; Ribeirão Preto Medical School of the University of São Paulo (USP); Av. Bandeirantes, 3900 Ribeirão Preto São Paulo 14049-900 Brazil
- Laboratory of Pain and Emotions, Department of Surgery and Anatomy; Ribeirão Preto Medical School of the University of São Paulo (USP); Av. Bandeirantes, 3900 Ribeirão Preto São Paulo 14049-900 Brazil
- Behavioural Neurosciences Institute; Av. do Café, 2450 Ribeirão Preto São Paulo 14050-220 Brazil
| | - Priscila Medeiros
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology; Ribeirão Preto Medical School of the University of São Paulo (USP); Av. Bandeirantes, 3900 Ribeirão Preto São Paulo 14049-900 Brazil
- Laboratory of Pain and Emotions, Department of Surgery and Anatomy; Ribeirão Preto Medical School of the University of São Paulo (USP); Av. Bandeirantes, 3900 Ribeirão Preto São Paulo 14049-900 Brazil
| | - Asmat Ullah Khan
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology; Ribeirão Preto Medical School of the University of São Paulo (USP); Av. Bandeirantes, 3900 Ribeirão Preto São Paulo 14049-900 Brazil
- Department of Eastern Medicine and Surgery; School of Medical and Health Sciences of the University of Poonch Rawalakot, Azad Jammu and Kashmir; Pakistan
| | - Norberto Cysne Coimbra
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology; Ribeirão Preto Medical School of the University of São Paulo (USP); Av. Bandeirantes, 3900 Ribeirão Preto São Paulo 14049-900 Brazil
- Laboratory of Pain and Emotions, Department of Surgery and Anatomy; Ribeirão Preto Medical School of the University of São Paulo (USP); Av. Bandeirantes, 3900 Ribeirão Preto São Paulo 14049-900 Brazil
- Behavioural Neurosciences Institute; Av. do Café, 2450 Ribeirão Preto São Paulo 14050-220 Brazil
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Roncon CM, Almada RC, Maraschin JC, Audi EA, Zangrossi H, Graeff FG, Coimbra NC. Pharmacological evidence for the mediation of the panicolytic effect of fluoxetine by dorsal periaqueductal gray matter μ-opioid receptors. Neuropharmacology 2015; 99:620-6. [DOI: 10.1016/j.neuropharm.2015.08.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/20/2015] [Accepted: 08/21/2015] [Indexed: 10/23/2022]
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Almada R, Roncon C, Elias-filho D, Coimbra N. Endocannabinoid signaling mechanisms in the substantia nigra pars reticulata modulate GABAergic nigrotectal pathways in mice threatened by urutu-cruzeiro venomous pit viper. Neuroscience 2015; 303:503-14. [DOI: 10.1016/j.neuroscience.2015.06.048] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 06/02/2015] [Accepted: 06/23/2015] [Indexed: 01/06/2023]
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Almada RC, Coimbra NC. Recruitment of striatonigral disinhibitory and nigrotectal inhibitory GABAergic pathways during the organization of defensive behavior by mice in a dangerous environment with the venomous snakeBothrops alternatus(Reptilia,Viperidae). Synapse 2015; 69:299-313. [DOI: 10.1002/syn.21814] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 02/02/2015] [Accepted: 02/24/2015] [Indexed: 12/22/2022]
Affiliation(s)
- Rafael Carvalho Almada
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology; Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP); Ribeirão Preto São Paulo 14049-900 Brazil
- Institute of Neuroscience and Behaviour (INeC); Monte Alegre, Ribeirão Preto São Paulo 14050-220 Brazil
| | - Norberto Cysne Coimbra
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology; Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP); Ribeirão Preto São Paulo 14049-900 Brazil
- Institute of Neuroscience and Behaviour (INeC); Monte Alegre, Ribeirão Preto São Paulo 14050-220 Brazil
- NAP-USP-Neurobiology of Emotions Research Centre (NuPNE); Ribeirão Preto Medical School of the University of São Paulo; Ribeirão Preto São Paulo 14049-900 Brazil
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da Silva JA, Biagioni AF, Almada RC, de Souza Crippa JA, Cecílio Hallak JE, Zuardi AW, Coimbra NC. Dissociation between the panicolytic effect of cannabidiol microinjected into the substantia nigra, pars reticulata, and fear-induced antinociception elicited by bicuculline administration in deep layers of the superior colliculus: The role of CB1-cannabinoid receptor in the ventral mesencephalon. Eur J Pharmacol 2015; 758:153-63. [PMID: 25841876 DOI: 10.1016/j.ejphar.2015.03.051] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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: 05/13/2014] [Revised: 03/11/2015] [Accepted: 03/17/2015] [Indexed: 01/17/2023]
Abstract
Many studies suggest that the substantia nigra, pars reticulata (SNpr), a tegmental mesencephalic structure rich in γ-aminobutyric acid (GABA)- and cannabinoid receptor-containing neurons, is involved in the complex control of defensive responses through the neostriatum-nigral disinhibitory and nigro-tectal inhibitory GABAergic pathways during imminently dangerous situations. The aim of the present work was to investigate the role played by CB1-cannabinoid receptor of GABAergic pathways terminal boutons in the SNpr or of SNpr-endocannabinoid receptor-containing interneurons on the effect of intra-nigral microinjections of cannabidiol in the activity of nigro-tectal inhibitory pathways. GABAA receptor blockade in the deep layers of the superior colliculus (dlSC) elicited vigorous defensive behaviour. This explosive escape behaviour was followed by significant antinociception. Cannabidiol microinjection into the SNpr had a clear anti-aversive effect, decreasing the duration of defensive alertness, the frequency and duration of defensive immobility, and the frequency and duration of explosive escape behaviour, expressed by running and jumps, elicited by transitory GABAergic dysfunction in dlSC. However, the innate fear induced-antinociception was not significantly changed. The blockade of CB1 endocannabinoid receptor in the SNpr decreased the anti-aversive effect of canabidiol based on the frequency and duration of defensive immobility, the frequency of escape expressed by running, and both the frequency and duration of escape expressed by jumps. These findings suggest a CB1 mediated endocannabinoid signalling in cannabidiol modulation of panic-like defensive behaviour, but not of innate fear-induced antinociception evoked by GABAA receptor blockade with bicuculline microinjection into the superior colliculus, with a putative activity in nigro-collicular GABAergic pathways.
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Affiliation(s)
- Juliana Almeida da Silva
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto 14049-900, São Paulo, Brazil; Behavioural Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto 14050-220, São Paulo, Brazil
| | - Audrey Francisco Biagioni
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto 14049-900, São Paulo, Brazil
| | - Rafael Carvalho Almada
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto 14049-900, São Paulo, Brazil; Behavioural Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto 14050-220, São Paulo, Brazil
| | - José Alexandre de Souza Crippa
- Department of Neurosciences and Behavioural Sciences, Division of Psychiatry, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av. dos Bandeirantes, 3900, Ribeirão Preto 14049-900, São Paulo, Brazil
| | - Jaime Eduardo Cecílio Hallak
- Department of Neurosciences and Behavioural Sciences, Division of Psychiatry, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av. dos Bandeirantes, 3900, Ribeirão Preto 14049-900, São Paulo, Brazil
| | - Antônio Waldo Zuardi
- Department of Neurosciences and Behavioural Sciences, Division of Psychiatry, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av. dos Bandeirantes, 3900, Ribeirão Preto 14049-900, São Paulo, Brazil
| | - Norberto Cysne Coimbra
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av Bandeirantes, 3900, Ribeirão Preto 14049-900, São Paulo, Brazil; Behavioural Neurosciences Institute (INeC), Av. do Café, 2450, Monte Alegre, Ribeirão Preto 14050-220, São Paulo, Brazil; Neurobiology of Emotions Research Centre (NAP-USP-NuPNE), Ribeirão Preto School of Medicine of the University of São Paulo (FMRP-USP), Av. dos Bandeirantes, 3900, Ribeirão Preto, São Paulo 14049-900, São Paulo, Brazil.
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Blum K, Febo M, Thanos PK, Baron D, Fratantonio J, Gold M. Clinically Combating Reward Deficiency Syndrome (RDS) with Dopamine Agonist Therapy as a Paradigm Shift: Dopamine for Dinner? Mol Neurobiol 2015; 52:1862-1869. [PMID: 25750061 PMCID: PMC4586005 DOI: 10.1007/s12035-015-9110-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 01/21/2015] [Indexed: 01/23/2023]
Abstract
Everyday, there are several millions of people that are increasingly unable to combat their frustrating and even fatal romance with getting high and/or experiencing “normal” feelings of well-being. In the USA, the FDA has approved pharmaceuticals for drug and alcohol abuse: tobacco and nicotine replacement therapy. The National Institute on Drug Abuse (NIDA) and the National Institute on Alcohol Abuse and Alcoholism (NIAAA) remarkably continue to provide an increasing understanding of the intricate functions of brain reward circuitry through sophisticated neuroimaging and molecular genetic applied technology. Similar work is intensely investigated on a worldwide basis with enhanced clarity and increased interaction between not only individual scientists but across many disciplines. However, while it is universally agreed that dopamine is a major neurotransmitter in terms of reward dependence, there remains controversy regarding how to modulate its role clinically to treat and prevent relapse for both substance and non-substance-related addictive behaviors. While the existing FDA-approved medications promote blocking dopamine, we argue that a more prudent paradigm shift should be biphasic—short-term blockade and long-term upregulation, enhancing functional connectivity of brain reward circuits.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry and McKnight Brain Institute, College of Medicine, University of Florida, P. O. Box 100256, Gainesville, FL 32610-0256 USA
- Human Integrated Services Unit, Center for Clinical and Translational Science, Department of Psychiatry, College of Medicine, University of Vermont, Burlington, VT USA
- Division of Applied Clinical Research, Dominion Diagnostics, LLC, North Kingstown, RI USA
- Department of Addiction Research and Therapy, Malibu Beach Recovery Center, Malibu, CA USA
| | - Marcelo Febo
- Department of Psychiatry and McKnight Brain Institute, College of Medicine, University of Florida, P. O. Box 100256, Gainesville, FL 32610-0256 USA
| | - Panayotis K. Thanos
- Behavior Neuropharmacology and Neuroimaging Laboratory, Department of Psychology, SUNY at Stony Brook, Stony Brook, NY USA
| | - David Baron
- Department of Psychiatry, Keck School of Medicine, University of Southern California, Los Angeles, CA USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA USA
| | - James Fratantonio
- Division of Applied Clinical Research, Dominion Diagnostics, LLC, North Kingstown, RI USA
| | - Mark Gold
- Department of Psychiatry and McKnight Brain Institute, College of Medicine, University of Florida, P. O. Box 100256, Gainesville, FL 32610-0256 USA
- Department of Research, Rivermernd Health, Atlanta, GA USA
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Melo-Thomas L, Thomas U. Deep brain stimulation of the inferior colliculus: A possible animal model to study paradoxical kinesia observed in some parkinsonian patients? Behav Brain Res 2015; 279:1-8. [DOI: 10.1016/j.bbr.2014.10.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 10/20/2014] [Accepted: 10/24/2014] [Indexed: 11/16/2022]
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Twardowschy A, Cysne Coimbra N. µ- and κ-Opioid receptor activation in the dorsal periaqueductal grey matter differentially modulates panic-like behaviours induced by electrical and chemical stimulation of the inferior colliculus. Brain Res 2015; 1597:168-79. [DOI: 10.1016/j.brainres.2014.11.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 11/26/2014] [Accepted: 11/29/2014] [Indexed: 11/24/2022]
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Almada R, Coimbra N, Brandão M. Medial prefrontal cortex serotonergic and GABAergic mechanisms modulate the expression of contextual fear: Intratelencephalic pathways and differential involvement of cortical subregions. Neuroscience 2015; 284:988-97. [DOI: 10.1016/j.neuroscience.2014.11.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 10/02/2014] [Accepted: 11/02/2014] [Indexed: 11/22/2022]
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Dall'Oglio A, Xavier LL, Hilbig A, Ferme D, Moreira JE, Achaval M, Rasia-Filho AA. Cellular components of the human medial amygdaloid nucleus. J Comp Neurol 2013; 521:589-611. [PMID: 22806548 DOI: 10.1002/cne.23192] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Revised: 04/22/2012] [Accepted: 07/10/2012] [Indexed: 12/24/2022]
Abstract
The medial nucleus (Me) is a superficial component of the amygdaloid complex. Here we assessed the density and morphology of the neurons and glial cells, the glial fibrillary acidic protein (GFAP) immunoreactivity, and the ultrastructure of the synaptic sites in the human Me. The optical fractionator method was applied. The Me presented an estimated mean neuronal density of 1.53 × 10⁵ neurons/mm³ (greater in the left hemisphere), more glia (72% of all cells) than neurons, and a nonneuronal:neuronal ratio of 2.7. Golgi-impregnated neurons had round or ovoid, fusiform, angular, and polygonal cell bodies (10-30 μm in diameter). The length of the dendrites varied, and pleomorphic spines were found in sparsely spiny or densely spiny cells (1.5-5.2 spines/dendritic μm). The axons in the Me neuropil were fine or coarsely beaded, and fibers showed simple or notably complex collateral terminations. The protoplasmic astrocytes were either isolated or formed small clusters and showed GFAP-immunoreactive cell bodies and multiple branches. Furthermore, we identified both asymmetrical (with various small, clear, round, electron-lucent vesicles and, occasionally, large, dense-core vesicles) and symmetrical (with small, flattened vesicles) axodendritic contacts, also including multisynaptic spines. The astrocytes surround and may compose tripartite or tetrapartite synapses, the latter including the extracellular matrix between the pre- and the postsynaptic elements. Interestingly, the terminal axons exhibited a glomerular-like structure with various asymmetrical contacts. These new morphological data on the cellular population and synaptic complexity of the human Me can contribute to our knowledge of its role in health and pathological conditions.
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Affiliation(s)
- Aline Dall'Oglio
- Neuroscience Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre 90170-050-RS, Brazil
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de Freitas RL, Bolognesi LI, Twardowschy A, Corrêa FMA, Sibson NR, Coimbra NC. Neuroanatomical and neuropharmacological approaches to postictal antinociception-related prosencephalic neurons: the role of muscarinic and nicotinic cholinergic receptors. Brain Behav 2013; 3:286-301. [PMID: 23785660 PMCID: PMC3683288 DOI: 10.1002/brb3.105] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 10/03/2012] [Accepted: 10/20/2012] [Indexed: 01/03/2023] Open
Abstract
Several studies have suggested the involvement of the hippocampus in the elaboration of epilepsy. There is evidence that suggests the hippocampus plays an important role in the affective and motivational components of nociceptive perception. However, the exact nature of this involvement remains unclear. Therefore, the aim of this study was to determine the role of muscarinic and nicotinic cholinergic receptors in the dorsal hippocampus (dH) in the organization of postictal analgesia. In a neuroanatomical study, afferent connections were found from the somatosensory cortex, the medial septal area, the lateral septal area, the diagonal band of Broca, and the dentate gyrus to the dH; all these areas have been suggested to modulate convulsive activity. Outputs to the dH were also identified from the linear raphe nucleus, the median raphe nucleus (MdRN), the dorsal raphe nucleus, and the locus coeruleus. All these structures comprise the endogenous pain modulatory system and may be involved either in postictal pronociception or antinociception that is commonly reported by epileptic patients. dH-pretreatment with cobalt chloride (1.0 mmol/L CoCl2/0.2 μL) to transiently inhibit local synapses decreased postictal analgesia 10 min after the end of seizures. Pretreatment of the dH with either atropine or mecamylamine (1.0 μg/0.2 μL) attenuated the postictal antinociception 30 min after seizures, while the higher dose (5.0 μg/0.2 μL) decreased postictal analgesia immediately after the end of seizures. These findings suggest that the dH exerts a critical role in the organization of postictal analgesia and that muscarinic and nicotinic cholinergic receptor-mediated mechanisms in the dH are involved in the elaboration of antinociceptive processes induced by generalized tonic-clonic seizures.
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Affiliation(s)
- Renato Leonardo de Freitas
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo (USP) Av. dos Bandeirantes 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil ; Institute for Neuroscience and Behaviour, Campus Universitarius of Ribeirão Preto of the University of São Paulo (USP) Av. dos Bandeirantes 3900, Ribeirão Preto, São Paulo, 14049-901, Brazil
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da Silva JA, de Freitas RL, Eichenberger GCD, Maria Padovan C, Cysne Coimbra N. Chemical neuroanatomical and psychopharmacological evidence that κ receptor-mediated endogenous opioid peptide neurotransmission in the dorsal and ventral mesencephalon modulates panic-like behaviour. Eur J Pharmacol 2013; 698:235-45. [DOI: 10.1016/j.ejphar.2012.07.038] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Felippotti TT, de Freitas RL, Coimbra NC. Endogenous opioid peptide-mediated neurotransmission in central and pericentral nuclei of the inferior colliculus recruits μ1-opioid receptor to modulate post-ictal antinociception. Neuropeptides 2012; 46:39-47. [PMID: 22104092 DOI: 10.1016/j.npep.2011.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 10/17/2011] [Accepted: 10/18/2011] [Indexed: 12/22/2022]
Abstract
BACKGROUND The aim of the present work was to investigate the involvement of the μ1-endogenous opioid peptide receptor-mediated system in post-ictal antinociception. METHODS Antinociceptive responses were determined by the tail-flick test after pre-treatment with the selective μ1-opioid receptor antagonist naloxonazine, peripherally or centrally administered at different doses. RESULTS Peripheral subchronic (24 h) pre-treatment with naloxonazine antagonised the antinociception elicited by tonic-clonic seizures. Acute (10 min) pre-treatment, however, did not have the same effect. In addition, microinjections of naloxonazine into the central, dorsal cortical and external cortical nuclei of the inferior colliculus antagonised tonic-clonic seizure-induced antinociception. Neither acute (10-min) peripheral pre-treatment with naloxonazine nor subchronic intramesencephalic blockade of μ1-opioid receptors resulted in consistent statistically significant differences in the severity of tonic-clonic seizures shown by Racine's index (1972), although the intracollicular specific antagonism of μ1-opioid receptor decreased the duration of seizures. CONCLUSION μ1-Opioid receptors and the inferior colliculus have been implicated in several endogenous opioid peptide-mediated responses such as antinociception and convulsion. The present findings suggest the involvement of μ1-opiate receptors of central and pericentral nuclei of the inferior colliculus in the modulation of tonic-clonic seizures and in the organisation of post-ictal antinociception.
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Affiliation(s)
- Tatiana Tocchini Felippotti
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Av. dos Bandeirantes, 3900, Ribeirão Preto, SP 14049-900, Brazil
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Uribe-Mariño A, Francisco A, Castiblanco-Urbina MA, Twardowschy A, Salgado-Rohner CJ, Crippa JAS, Hallak JEC, Zuardi AW, Coimbra NC. Anti-aversive effects of cannabidiol on innate fear-induced behaviors evoked by an ethological model of panic attacks based on a prey vs the wild snake Epicrates cenchria crassus confrontation paradigm. Neuropsychopharmacology 2012; 37:412-21. [PMID: 21918503 PMCID: PMC3242302 DOI: 10.1038/npp.2011.188] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Several pharmacological targets have been proposed as modulators of panic-like reactions. However, interest should be given to other potential therapeutic neurochemical agents. Recent attention has been given to the potential anxiolytic properties of cannabidiol, because of its complex actions on the endocannabinoid system together with its effects on other neurotransmitter systems. The aim of this study was to investigate the effects of cannabidiol on innate fear-related behaviors evoked by a prey vs predator paradigm. Male Swiss mice were submitted to habituation in an arena containing a burrow and subsequently pre-treated with intraperitoneal administrations of vehicle or cannabidiol. A constrictor snake was placed inside the arena, and defensive and non-defensive behaviors were recorded. Cannabidiol caused a clear anti-aversive effect, decreasing explosive escape and defensive immobility behaviors outside and inside the burrow. These results show that cannabidiol modulates defensive behaviors evoked by the presence of threatening stimuli, even in a potentially safe environment following a fear response, suggesting a panicolytic effect.
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Affiliation(s)
- Andrés Uribe-Mariño
- Laboratório de Neuroanatomia and Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil,Institute for Neuroscience and Behaviour (INeC), Ribeirão Preto (SP), Brazil
| | - Audrey Francisco
- Laboratório de Neuroanatomia and Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil
| | - Maria Angélica Castiblanco-Urbina
- Laboratório de Neuroanatomia and Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil,Institute for Neuroscience and Behaviour (INeC), Ribeirão Preto (SP), Brazil
| | - André Twardowschy
- Laboratório de Neuroanatomia and Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil
| | - Carlos José Salgado-Rohner
- Laboratório de Neuroanatomia and Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil
| | - José Alexandre S Crippa
- Departamento de Neurociências e Ciências do Comportamento, Setor de Psiquiatria, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil,National Institute for Science and Translational Technology in Medicine (INCT-TM, CNPq), Federal University of Rio Grande do Sul, Brazil
| | - Jaime Eduardo Cecílio Hallak
- Departamento de Neurociências e Ciências do Comportamento, Setor de Psiquiatria, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil,National Institute for Science and Translational Technology in Medicine (INCT-TM, CNPq), Federal University of Rio Grande do Sul, Brazil
| | - Antônio Waldo Zuardi
- Departamento de Neurociências e Ciências do Comportamento, Setor de Psiquiatria, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil
| | - Norberto Cysne Coimbra
- Laboratório de Neuroanatomia and Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Ribeirão Preto (SP), Brasil,Institute for Neuroscience and Behaviour (INeC), Ribeirão Preto (SP), Brazil,Laboratório de Neuroanatomia and Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Avenida dos Bandeirantes, 3900, Ribeirão Preto (SP), 14049-900, Brasil. Tel: +55 16 3602 3116, Fax: +55 16 3602 3349, E-mail:
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Felippotti TT, Ribeiro do Carmo D, Paim LL, Stradiotto NR, Bicalho UDO, Parada CA, Grillo R, Fraceto LF, Coimbra NC. Effect of a nanostructured dendrimer-naloxonazine complex on endogenous opioid peptides μ1 receptor-mediated post-ictal antinociception. Nanomedicine: Nanotechnology, Biology and Medicine 2011; 7:871-80. [DOI: 10.1016/j.nano.2011.02.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Revised: 12/13/2010] [Accepted: 02/19/2011] [Indexed: 01/17/2023]
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Abstract
The opioid system plays a crucial role in the neural modulation of anxiety. The involvement of opioid ligands and receptors in physiological and dysfunctional forms of anxiety is supported by findings from a wide range of preclinical and clinical studies, including clinical trials, experimental research, and neuroimaging, genetic, and epidemiological data. In this review we provide a summary of studies from a variety of research disciplines to elucidate the role of the opioid system in the neurobiology of anxiety. First, we report data from preclinical studies using animal models to examine the modulatory role of central opioid system on defensive responses conducive to fear and anxiety. Second, we summarize the human literature providing evidence that clinical and experimental human studies are consistent with preclinical models. The implication of these data is that activation of the opioid system leads to anxiolytic responses both in healthy subjects and in patients suffering from anxiety disorders. The role of opioids in suppressing anxiety may serve as an adaptive mechanism, collocated in the general framework of opioid neurotransmission blunting acute negative and distressing affective responses.
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Affiliation(s)
- A Colasanti
- Neuropsychopharmacology Unit, Centre for Pharmacology and Therapeutics, Division of Experimental Medicine, Imperial College London, London, UK.
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Freitas RL, Uribe-Mariño A, Castiblanco-Urbina MA, Elias-Filho DH, Coimbra NC. GABA(A) receptor blockade in dorsomedial and ventromedial nuclei of the hypothalamus evokes panic-like elaborated defensive behaviour followed by innate fear-induced antinociception. Brain Res 2009; 1305:118-31. [PMID: 19799880 DOI: 10.1016/j.brainres.2009.09.096] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 09/23/2009] [Accepted: 09/24/2009] [Indexed: 01/02/2023]
Abstract
Dysfunction in the hypothalamic GABAergic system has been implicated in panic syndrome in humans. Furthermore, several studies have implicated the hypothalamus in the elaboration of pain modulation. Panic-prone states are able to be experimentally induced in laboratory animals to study this phenomenon. The aim of the present work was to investigate the involvement of medial hypothalamic nuclei in the organization of panic-like behaviour and the innate fear-induced oscillations of nociceptive thresholds. The blockade of GABA(A) receptors in the neuronal substrates of the ventromedial or dorsomedial hypothalamus was followed by elaborated defensive panic-like reactions. Moreover, innate fear-induced antinociception was consistently elicited after the escape behaviour. The escape responses organized by the dorsomedial and ventromedial hypothalamic nuclei were characteristically more elaborated, and a remarkable exploratory behaviour was recorded during GABA(A) receptor blockade in the medial hypothalamus. The motor characteristic of the elaborated defensive escape behaviour and the patterns of defensive alertness and defensive immobility induced by microinjection of the bicuculline either into the dorsomedial or into the ventromedial hypothalamus were very similar. This was followed by the same pattern of innate fear-induced antinociceptive response that lasted approximately 40 min after the elaborated defensive escape reaction in both cases. These findings suggest that dysfunction of the GABA-mediated neuronal system in the medial hypothalamus causes panic-like responses in laboratory animals, and that the elaborated escape behaviour organized in both dorsomedial and ventromedial hypothalamic nuclei are followed by significant innate-fear-induced antinociception. Our findings indicate that the GABA(A) receptor of dorsomedial and ventromedial hypothalamic nuclei are critically involved in the modulation of panic-like behaviour.
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Affiliation(s)
- Renato Leonardo Freitas
- Laboratório de Neuroanatomia & Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Av. dos Bandeirantes, 3900, Ribeirão Preto (SP), 14049-900, Brasil.
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Doretto MC, Cortes-de-Oliveira JA, Rossetti F, Garcia-Cairasco N. Role of the superior colliculus in the expression of acute and kindled audiogenic seizures in Wistar audiogenic rats. Epilepsia 2009; 50:2563-74. [PMID: 19490050 DOI: 10.1111/j.1528-1167.2009.02164.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE The role of the superior colliculus (SC) in seizure expression is controversial and appears to be dependent upon the epilepsy model. This study shows the effect of disconnection between SC deep layers and adjacent tissues in the expression of acute and kindling seizures. METHODS Subcollicular transections, ablation of SC superficial and deep layers, and ablation of only the cerebral cortex were evaluated in the Wistar audiogenic rat (WAR) strain during acute and kindled audiogenic seizures. The audiogenic seizure kindling protocol started 4 days after surgeries, with two acoustic stimuli per day for 10 days. Acute audiogenic seizures were evaluated by a categorized seizure severity midbrain index (cSI) and kindled seizures by a severity limbic index (LI). RESULTS All subcollicular transections reaching the deep layers of the SC abolished audiogenic seizures or significantly decreased cSI. In the unlesioned kindled group, a reciprocal relationship between limbic and brainstem pattern of seizures was seen. The increased number of stimuli provoked an audiogenic kindling phenomenon. Ablation of the entire SC (ablation group) or of the cerebral cortex only (ctx-operated group) hampered the acquisition of limbic behaviors. There was no difference in cSI and LI between the ctx-operated and ablation groups, but there was a difference between ctx-operated and the unlesioned kindled group. There was also no difference in cSI between SC deep layer transection and ablation groups. Results of histologic analyses were similar for acute and kindled audiogenic seizure groups. CONCLUSIONS SC deep layers are involved in the expression of acute and kindled audiogenic seizure, and the cerebral cortex is essential for audiogenic kindling development.
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Affiliation(s)
- Maria C Doretto
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, São Paulo, Brazil
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Freitas RL, Bassi GS, de Oliveira AM, Coimbra NC. Serotonergic neurotransmission in the dorsal raphe nucleus recruits in situ 5-HT2A/2C receptors to modulate the post-ictal antinociception. Exp Neurol 2008; 213:410-8. [DOI: 10.1016/j.expneurol.2008.07.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2008] [Revised: 07/02/2008] [Accepted: 07/03/2008] [Indexed: 12/28/2022]
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Guimarães-Costa R, Guimarães-Costa MB, Pippa-Gadioli L, Weltson A, Ubiali WA, Paschoalin-Maurin T, Felippotti TT, Elias-Filho DH, Laure CJ, Coimbra NC. Innate defensive behaviour and panic-like reactions evoked by rodents during aggressive encounters with Brazilian constrictor snakes in a complex labyrinth: behavioural validation of a new model to study affective and agonistic reactions in a prey versus predator paradigm. J Neurosci Methods 2007; 165:25-37. [PMID: 17604117 DOI: 10.1016/j.jneumeth.2007.05.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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: 03/16/2007] [Revised: 05/14/2007] [Accepted: 05/17/2007] [Indexed: 11/23/2022]
Abstract
Defensive behaviour has been extensively studied, and non-invasive methodologies may be interesting approaches to analyzing the limbic system function as a whole. Using experimental models of animals in the state of anxiety has been fundamental in the search for new anxiolytic and antipanic compounds. The aim of this present work is to examine a new model for the study of affective behaviour, using a complex labyrinth consisting of an arena and galleries forming a maze. Furthermore, it aims to compare the defensive behaviour of Wistar rats, Mongolian gerbils and golden hamsters in a complex labyrinth, as well as the defensive behaviour of Meriones unguiculatus in aggressive encounters with either Epicrates cenchria assisi or Boa constrictor amarali in this same model. Among species presently studied, the Mongolian gerbils showed better performance in the exploration of both arena and galleries of the labyrinth, also demonstrating less latency in finding exits of the galleries. This increases the possibility of survival, as well as optimizes the events of encounter with the predator. The duration of alertness and freezing increased during confrontation with living Epicrates, as well as the duration of exploratory behaviour in the labyrinth. There was an increase in the number of freezing and alertness behaviours, as well as in duration of alertness during confrontations involving E.c. assisi, compared with behavioural reactions elicited by jirds in presence of B.c. amarali. Interestingly, the aggressive behaviour of Mongolian gerbils was more prominent against B.c. amarali compared with the other Boidae snake. E.c. assisi elicited more offensive attacks and exhibited a greater time period of body movement than B.c. amarali, which spent more time in the arena and in defensive immobility than the E.c. assisi. Considering that jirds evoked more fear-like reaction in contact with E.c. assisi, a fixed E.c. assisi kept in a hermetically closed acrylic box was used as control. In these prey/predator encounter-based experiments, there was an increase in the number of alertness and freezing behaviours exhibited by gerbils, and a decrease in the number of crossing elicited by them, when comparing confrontations between the living E.c. assisi and the control. The experiments were performed at 7.0 p.m. In the labyrinth, the snakes showed in confrontation similar performance to that observed in nature (organizing hunting behaviour, offensive/defensive attack, constriction, prey inspection and feeding behaviour), which were essential to the validity of the experiments and gave behavioural validation within the complex labyrinth.
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Affiliation(s)
- Raquel Guimarães-Costa
- Laboratory of Neuroanatomy & Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo (USP), Av. dos Bandeirantes, 3900 Ribeirão Preto, SP 14049-900, Brazil
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Abstract
This paper is the 28th consecutive installment of the annual review of research concerning the endogenous opioid system, now spanning over a quarter-century of research. It summarizes papers published during 2005 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity, neurophysiology and transmitter release (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); 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, 65-30 Kissena Blvd., Flushing, NY 11367, USA.
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Castellan-Baldan L, da Costa Kawasaki M, Ribeiro SJ, Calvo F, Corrêa VMA, Coimbra NC. Topographic and functional neuroanatomical study of GABAergic disinhibitory striatum–nigral inputs and inhibitory nigrocollicular pathways: Neural hodology recruiting the substantia nigra, pars reticulata, for the modulation of the neural activity in the inferior colliculus involved with panic-like emotions. J Chem Neuroanat 2006; 32:1-27. [PMID: 16820278 DOI: 10.1016/j.jchemneu.2006.05.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [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: 11/29/2005] [Revised: 03/17/2006] [Accepted: 05/01/2006] [Indexed: 10/24/2022]
Abstract
Considering the influence of the substantia nigra on mesencephalic neurons involved with fear-induced reactions organized in rostral aspects of the dorsal midbrain, the present work investigated the topographical and functional neuroanatomy of similar influence on caudal division of the corpora quadrigemina, addressing: (a) the neural hodology connecting the neostriatum, the substantia nigra, periaqueductal gray matter and inferior colliculus (IC) neural networks; (b) the influence of the inhibitory neostriatonigral-nigrocollicular GABAergic links on the control of the defensive behavior organized in the IC. The effects of the increase or decrease of activity of nigrocollicular inputs on defensive responses elicited by either electrical or chemical stimulation of the IC were also determined. Electrolytic or chemical lesions of the substantia nigra, pars reticulata (SNpr), decreased the freezing and escape behaviors thresholds elicited by electrical stimulation of the IC, and increased the behavioral responses evoked by the GABAA blockade in the same sites of the mesencephalic tectum (MT) electrically stimulated. These findings were corroborated by similar effects caused by microinjections of the GABAA-receptor agonist muscimol in the SNpr, followed by electrical and chemical stimulations of the IC. The GABAA blockade in the SNpr caused a significant increase in the defensive behavior thresholds elicited by electrical stimulation of the IC and a decrease in the mean incidence of panic-like responses induced by microinjections of bicuculline in the mesencephalic tectum (inferior colliculus). These findings suggest that the substantia nigra receives GABAergic inputs that modulate local and also inhibitory GABAergic outputs toward the IC. In fact, neurotracing experiments with fast blue and iontophoretic microinjections of biotinylated dextran amine either into the inferior colliculus or in the reticular division of the substantia nigra demonstrated a neural link between these structures, as well as between the neostriatum and SNpr.
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Affiliation(s)
- Lissandra Castellan-Baldan
- Laboratory of Neuroanatomy & Neuropsychobiology, Department of Morphology, School of Medicine of Ribeirão Preto of the University of São Paulo (USP), Ribeirão Preto 14049-900, SP, Brazil
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Calvo F, Coimbra NC. Interactions between opioid-peptides-containing pathways and GABAA-receptors-mediated systems modulate panic-like-induced behaviors elicited by electric and chemical stimulation of the inferior colliculus. Brain Res 2006; 1104:92-102. [PMID: 16797498 DOI: 10.1016/j.brainres.2006.05.056] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [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: 01/06/2006] [Revised: 05/09/2006] [Accepted: 05/19/2006] [Indexed: 10/24/2022]
Abstract
Aiming to clarify the effect of interactive interconnections between the endogenous opioid peptides-neural links and GABAergic pathways on panic-like responses, in the present work, the effect of the peripheral and central administration of morphine or the non-specific opioid receptors antagonist naloxone was evaluated on the fear-induced responses (defensive attention, defensive immobility and escape behavior) elicited by electric and chemical stimulation of the inferior colliculus. Central microinjections of opioid drugs in the inferior colliculus were also performed followed by local administration of the GABA(A)-receptor antagonist bicuculline. The defensive behavior elicited by the blockade of GABAergic receptors in the inferior colliculus had been quantitatively analyzed, recording the number of crossing, jump, rotation and rearing, in each minute, during 30 min, in the open-field test. The opioid receptors stimulation with morphine decreased the defensive attention, the defensive immobility and escape behavior thresholds, and the non-specific opioid receptors blockade caused opposite effects, enhancing the defensive behavior thresholds. These effects were corroborated by either the stimulation or the inhibition of opioid receptors followed by the GABA(A) receptor blockade with bicuculline, microinjected into the inferior colliculus. There was a significant increase in the diverse fear-induced responses caused by bicuculline with the pretreatment of the inferior colliculus with morphine, and the opposite effect was recorded after the pretreatment of the inferior colliculus nuclei with naloxone followed by bicuculline local administration. These findings suggest an interaction between endogenous opioid-peptides-containing connections and GABA(A)-receptor-mediated system with direct influence on the organization of the panic-like or fear-induced responses elaborated in the inferior colliculus during critical emotional states.
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Affiliation(s)
- Fabrício Calvo
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (FMRP-USP), Av. dos Bandeirantes, 3900, Ribeirão Preto (SP), 1049-900, Brazil
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de Oliveira RC, de Oliveira R, Ferreira CMDR, Coimbra NC. Involvement of 5-HT(2) serotonergic receptors of the nucleus raphe magnus and nucleus reticularis gigantocellularis/paragigantocellularis complex neural networks in the antinociceptive phenomenon that follows the post-ictal immobility syndrome. Exp Neurol 2006; 201:144-53. [PMID: 16842781 DOI: 10.1016/j.expneurol.2006.03.033] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [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: 01/04/2006] [Revised: 03/17/2006] [Accepted: 03/31/2006] [Indexed: 12/30/2022]
Abstract
The post-ictal immobility syndrome is followed by a significant increase in the nociceptive thresholds in animals and men. In this interesting post-ictal behavioral response, endogenous opioid peptides-mediated mechanisms, as well as cholinergic-mediated antinociceptive processes, have been suggested. However, considering that many serotonergic descending pathways have been implicated in antinociceptive reactions, the aim of the present work is to investigate the involvement of 5-HT(2)-serotonergic receptor subfamily in the post-ictal antinociception. The analgesia was measured by the tail-flick test in seven or eight Wistar rats per group. Convulsions were followed by statistically significant increase in the tail-flick latencies (TFL), at least for 120 min of the post-ictal period. Male Wistar rats were submitted to stereotaxic surgery for introduction of a guide-cannula in the rhombencephalon, aiming either the nucleus raphe magnus (NRM) or the gigantocellularis complex. In independent groups of animals, these nuclei were neurochemically lesioned with a unilateral microinjection of ibotenic acid (1.0 microg/0.2 microL). The neuronal damage of either the NRM or nucleus reticularis gigantocellularis/paragigantocellularis complex decreased the post-ictal analgesia. Also, in other independent groups, central administration of ritanserin (5.0 microg/0.2 microL) or physiological saline into each of the reticular formation nuclei studied caused a statistically significant decrease in the TFL of seizing animals, as compared to controls, in all post-ictal periods studied. These results indicate that serotonin input-connected neurons of the pontine and medullarly reticular nuclei may be involved in the post-ictal analgesia.
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Affiliation(s)
- Rithiele Cristina de Oliveira
- Laboratory of Neuroanatomy and Neuropsychobiology, Department of Pharmacology, School of Medicine of Ribeirão Preto of the University of São Paulo (USP), Av. dos Bandeirantes 3900, Ribeirão Preto (SP) 14049-900, Brazil
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Couto LB, Moroni CR, dos Reis Ferreira CM, Elias-Filho DH, Parada CA, Pelá IR, Coimbra NC. Descriptive and functional neuroanatomy of locus coeruleus-noradrenaline-containing neurons involvement in bradykinin-induced antinociception on principal sensory trigeminal nucleus. J Chem Neuroanat 2006; 32:28-45. [PMID: 16678997 DOI: 10.1016/j.jchemneu.2006.03.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [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: 09/01/2005] [Revised: 03/28/2006] [Accepted: 03/29/2006] [Indexed: 11/24/2022]
Abstract
The present study was carried out in Wistar rats, using the jaw-opening reflex and dental pulp stimulation, to investigate noradrenaline- and serotonin-mediated antinociceptive circuits. The effects of microinjections of bradykinin into the principal sensory trigeminal nucleus (PSTN) before and after neurochemical lesions of the locus coeruleus noradrenergic neurons were studied. Neuroanatomical experiments showed evidence for reciprocal neuronal pathways connecting the locus coeruleus (LC) to trigeminal sensory nuclei and linking monoaminergic nuclei of the pain inhibitory system to spinal trigeminal nucleus (STN). Fast blue (FB) injections in the locus coeruleus/subcoeruleus region retrogradely labeled neurons in the contralateral PSTN and LC. Microinjections of FB into the STN showed neurons labeled in both ipsilateral and contralateral LC, as well as in the ipsilateral Barrington's nucleus and subcoeruleus area. Retrograde tract-tracing with FB also showed that the mesencephalic trigeminal nucleus sends neural pathways towards the ipsilateral PSTN, with outputs from cranial and caudal aspects of the brainstem. In addition, neurons from the lateral and dorsolateral columns of periaqueductal gray matter also send outputs to the ipsilateral PSTN. Microinjections of FB in the interpolar and caudal divisions of the STN labeled neurons in the caudal subdivision of STN. Microinjections in the STN interpolar and caudal divisions also retrogradely labeled serotonin- and noradrenaline-containing nucleus of the brainstem pain inhibitory system. Finally, the gigantocellularis complex (nucleus reticularis gigantocellularis/paragigantocellularis), nucleus raphe magnus and nucleus raphe pallidus also projected to the caudal divisions of the STN. Microinjections of bradykinin in the PSTN caused a statistically significant long-lasting antinociception, antagonized by the damage of locus coeruleus-noradrenergic neuronal fibres with (N-(2-chloroethyl)-N-ethyl-2-bromobenzylamine) (DSP4), a neurotoxin that specifically depleted noradrenaline from locus coeruleus terminal fields. These data suggest that serotonin- and noradrenaline-containing nuclei of the endogenous pain inhibitory system exert a key-role in the antinociceptive mechanisms of bradykinin and the locus coeruleus is crucially involved in this effect.
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Affiliation(s)
- Lucélio Bernardes Couto
- Laboratory of Pharmacology, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, 3900, Ribeirão Preto (SP), 14049-900, Brazil
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