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Huang Y, He C, Hu Z, Chu X, Zhou S, Hu X, Deng J, Xiao D, Tao T, Yang H, Chen AF, Yin Y, Yang X. The beneficial effects of alpha-tocopherol on intestinal function and the expression of tight junction proteins in differentiated segments of the intestine in piglets. Food Sci Nutr 2023; 11:677-687. [PMID: 36789053 PMCID: PMC9922147 DOI: 10.1002/fsn3.3103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 09/12/2022] [Accepted: 09/28/2022] [Indexed: 11/10/2022] Open
Abstract
Alpha (α)-tocopherol is a major component of dietary vitamin E. Despite being one of the most widely used food supplements in both animals and humans, its role in intestinal functions remains unknown. We were able to examine and accurately demonstrate its permeability effect in vitro and its differentiated effect on tight junction expression in different segments of the intestine in vivo using cultured intestinal porcine epithelial cell line (IPEC-J2) and piglets. A cultured IPEC-J2 demonstrated that α-tocopherol upregulated the expression of tight junction proteins and improved their integrity, with a maximum effect at concentrations ranging from 20 to 40 μmol/L. In vivo data from weaned pigs fed different doses of α-tocopherol for 2 weeks revealed that α-tocopherol effectively increases the expression of tight junction proteins in all sections of the intestinal mucosa, with the highest effect on the duodenum at an optimum dose of 20-50 mg/kg. In contrast, α-tocopherol did not affect intestinal inflammation. These findings suggest that α-tocopherol maintains intestinal integrity and increases the expression of tight junction proteins both in vitro and in vivo.
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Affiliation(s)
- Yanjun Huang
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Caimei He
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Zheng Hu
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Xuetong Chu
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Sichun Zhou
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Xin Hu
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Jun Deng
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Di Xiao
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Ting Tao
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Huansheng Yang
- Research Center for Healthy Breeding of Livestock and PoultryHunan Engineering and Research Center of Animal and Poultry Science and Key Laboratory for Agro‐ecological Processes in Subtropical RegionInstitute of Subtropical Agriculture, The Chinese Academy of SciencesChangshaChina
| | - Alex F. Chen
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
| | - Yulong Yin
- Research Center for Healthy Breeding of Livestock and PoultryHunan Engineering and Research Center of Animal and Poultry Science and Key Laboratory for Agro‐ecological Processes in Subtropical RegionInstitute of Subtropical Agriculture, The Chinese Academy of SciencesChangshaChina
| | - Xiaoping Yang
- Key Laboratory for Study and Discovery of Small Targeted Molecules of Hunan ProvinceDepartment of Pharmacy, School of MedicineHunan Normal UniversityChangshaChina
- Research Center for Healthy Breeding of Livestock and PoultryHunan Engineering and Research Center of Animal and Poultry Science and Key Laboratory for Agro‐ecological Processes in Subtropical RegionInstitute of Subtropical Agriculture, The Chinese Academy of SciencesChangshaChina
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Reinheimer JB, Bressan GN, de Freitas CM, Ceretta APC, Krum BN, Nogara PA, Rodrigues T, Schwerz JP, da Rocha JBT, Fachinetto R. Effects of CATECHIN on reserpine-induced vacuous chewing movements: behavioral and biochemical analysis. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2020; 393:2439-2452. [PMID: 32725283 DOI: 10.1007/s00210-020-01923-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 06/10/2020] [Indexed: 10/23/2022]
Abstract
This study evaluated the effect of (+)-catechin, a polyphenolic compound, on orofacial dyskinesia (OD) induced by reserpine in mice. The potential modulation of monoaminoxidase (MAO) activity, tyrosine hydroxylase (TH) and glutamic acid decarboxylase (GAD67) immunoreactivity by catechin were used as biochemical endpoints. The interaction of catechin with MAO-A and MAO-B was determined in vitro and in silico. The effects of catechin on OD induced by reserpine (1 mg/kg for 4 days, subcutaneously) in male Swiss mice were examined. After, catechin (10, 50 or 100 mg/kg, intraperitoneally) or its vehicle were given for another 20 days. On the 6th, 8th, 15th and 26th day, vacuous chewing movements (VCMs) and locomotor activity were quantified. Biochemical markers (MAO activity, TH and GAD67 immunoreactivity) were evaluated in brain structures. In vitro, catechin inhibited both MAO isoforms at concentrations of 0.34 and 1.03 mM being completely reversible for MAO-A and partially reversible for MAO-B. Molecular docking indicated that the catechin bound in the active site of MAO-A, while in the MAO-B it interacted with the surface of the enzyme in an allosteric site. In vivo, reserpine increased the VCMs and decreased the locomotor activity. Catechin (10 mg/kg), decreased the number of VCMs in the 8th day in mice pre-treated with reserpine without altering other behavioral response. Ex vivo, the MAO activity and TH and GAD67 immunoreactivity were not altered by the treatments. Catechin demonstrated a modest and transitory protective effect in a model of OD in mice.
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Affiliation(s)
- Jeane Binotto Reinheimer
- ªPrograma de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Getulio Nicola Bressan
- ªPrograma de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Catiuscia Molz de Freitas
- ªPrograma de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Ana Paula Chiapinotto Ceretta
- Programa de Pós-graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, 97105-900, RS, Brazil
| | - Bárbara Nunes Krum
- Programa de Pós-graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, 97105-900, RS, Brazil
| | - Pablo Andrei Nogara
- ªPrograma de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Talita Rodrigues
- Programa de Pós-graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, 97105-900, RS, Brazil
| | | | - João Batista Teixeira da Rocha
- ªPrograma de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Roselei Fachinetto
- ªPrograma de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
- Programa de Pós-graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, 97105-900, RS, Brazil.
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Pereira AG, Poli A, Matheus FC, de Bortoli da Silva L, Fadanni GP, Izídio GS, Latini A, Prediger RD. Temporal development of neurochemical and cognitive impairments following reserpine administration in rats. Behav Brain Res 2020; 383:112517. [DOI: 10.1016/j.bbr.2020.112517] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 12/28/2022]
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Huang X, Wu H, Jiang R, Sun G, Shen J, Ma M, Ma C, Zhang S, Huang Z, Wu Q, Chen G, Tao W. The antidepressant effects of ɑ-tocopherol are related to activation of autophagy via the AMPK/mTOR pathway. Eur J Pharmacol 2018; 833:1-7. [DOI: 10.1016/j.ejphar.2018.05.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/28/2018] [Accepted: 05/17/2018] [Indexed: 12/25/2022]
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Differential behavioral and glial responses induced by dopaminergic mechanisms in the iNOS knockout mice. Behav Brain Res 2018; 350:44-53. [PMID: 29751018 DOI: 10.1016/j.bbr.2018.05.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/05/2018] [Accepted: 05/03/2018] [Indexed: 11/23/2022]
Abstract
The interaction between distinctive nitric oxide synthase (NOS) isoforms and the dopamine system provides new avenues to the development of pharmacological tools for the pathophysiological conditions of the dopaminergic system. Our aim was to investigate the influences of dopamine-induced effects in inducible NOS knockout (iNOS KO) mice. In order to characterize iNOS KO mice phenotype, the animals were submitted to the basal analyses of motor, sensorimotor and sensorial abilities. Pharmacological challenging of the dopaminergic system included the investigation of amphetamine-induced prepulse inhibition (PPI) disruption, haloperidol-induced catalepsy, reserpine-induced oral involuntary movements and hyperlocomotion induced by amphetamine in reserpine treated mice. The iNOS KO mice showed significant reduction of spontaneous motor activity, but there was no significant difference in sensorimotor or sensorial responses of iNOS KO mice compared to wild type (WT). Regarding the dopaminergic system, iNOS KO mice showed a significant increase of haloperidol-induced catalepsy. This effect was confirmed through an iNOS pharmacological inhibitor (1400 W) in WT mice. In addition, iNOS KO reserpine treated mice showed reduced oral involuntary movements and amphetamine-induced hyperlocomotion. Knowing that iNOS is mainly expressed in glial cells we analyzed the immunoreactivity (ir) for GFAP (astrocyte marker) and IBA-1 (microglial marker) in the striatum, an area enrolled in motor planning among other functions. iNOS KO presented reduced GFAP-ir and IBA-1-ir compared with WT. Reserpine treatment increased GFAP-ir in both WT and iNOS KO. However, these effects were slighter in iNOS KO. Activated state of microglia was increased by reserpine only in WT mice. Our results further demonstrated that the absence of iNOS interfered with dopamine-mediated behavioral and molecular responses. These results increase the understanding of the dopamine and NO system interaction, which is useful for the management of the dopamine-related pathologies.
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L-Theanine Decreases Orofacial Dyskinesia Induced by Reserpine in Rats. Neurotox Res 2018; 34:375-387. [DOI: 10.1007/s12640-018-9897-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 03/20/2018] [Accepted: 03/28/2018] [Indexed: 01/13/2023]
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Evaluation the Effects of Foeniculum vulgare Essence on Behavioral-Motor Disorders of Parkinson’s Disease induced by Reserpine in Ovariectomized and Non Ovariectomized Rats. Jundishapur J Nat Pharm Prod 2018. [DOI: 10.5812/jjnpp.67391] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Lins LCRF, Souza MF, Bispo JMM, Gois AM, Melo TCS, Andrade RAS, Quintans-Junior LJ, Ribeiro AM, Silva RH, Santos JR, Marchioro M. Carvacrol prevents impairments in motor and neurochemical parameters in a model of progressive parkinsonism induced by reserpine. Brain Res Bull 2018; 139:9-15. [PMID: 29378222 DOI: 10.1016/j.brainresbull.2018.01.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 01/02/2018] [Accepted: 01/18/2018] [Indexed: 12/29/2022]
Abstract
Parkinson's disease (PD) is a neurodegenerative disease characterized by a progressive degeneration of dopaminergic neurons in the substantia nigra pars compact (SNpc), with consequent depletion of dopamine in the striatum, which gives rise to the characteristic motor symptoms of PD. Although its etiology is unknown, several studies have suggested that oxidative stress plays a critical function in the pathophysiology of PD, and antioxidant agents could be helpful to slown down the dopaminergic neurodegeneration. Carvacrol (CA) is a phenolic monoterpene found in essential oils of many aromatic plants that presents antioxidant and neuroprotective effects. This study aimed to assess the effect of CA in a reserpine (RES)-induced rat model of PD. Male Wistar rats received 15 s.c. injections of 0.1 mg/kg RES or vehicle, every other day, concomitantly to daily i.p. injections of CA (12.5 or 25 mg/kg) or vehicle. Across the treatment, the animals were submitted to behavioral evaluation in the catalepsy test (performed daily), open field test (7th day) and assessment of vacuous chewing movements (12th, 20th and 30th days). Upon completion of behavioral tests, rats were perfused and their brains underwent tyrosine hydroxylase (TH) immunohistochemical analysis. Our results showed that CA (12.5 e 25 mg/kg) prevented the increase in catalepsy behavior and number of vacuous chewing movements, but failed to revert the decreased open-field locomotor activity induced by RES. In addition, CA in both doses prevented the decrease in TH immunostaining induced by RES in the SNpc and dorsal striatum. Taken together, our results suggest that CA shows a protective effect in a rat model of PD, preventing motor and neurochemical impairments induced by RES. Thus, the use of CA as a promising new strategy for the prevention and/or treatment of PD may be considered.
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Affiliation(s)
| | - Marina F Souza
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - José Marcos M Bispo
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Auderlan M Gois
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | | | | | | | | | - Regina H Silva
- Department of Pharmacology, Federal University of São Paulo, São Paulo, SP, Brazil
| | - José R Santos
- Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil.
| | - Murilo Marchioro
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
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Passiflora cincinnata Extract Delays the Development of Motor Signs and Prevents Dopaminergic Loss in a Mice Model of Parkinson's Disease. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:8429290. [PMID: 28835767 PMCID: PMC5556616 DOI: 10.1155/2017/8429290] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 06/20/2017] [Indexed: 02/02/2023]
Abstract
Passiflora cincinnata Masters is a Brazilian native species of passionflower. This genus is known in the American continent folk medicine for its diuretic and analgesic properties. Nevertheless, few studies investigated possible biological effects of P. cincinnata extracts. Further, evidence of antioxidant actions encourages the investigation of possible neuroprotective effects in animal models of neurodegenerative diseases. This study investigates the effect of the P. cincinnata ethanolic extract (PAS) on mice submitted to a progressive model of Parkinson's disease (PD) induced by reserpine. Male (6-month-old) mice received reserpine (0.1 mg/kg, s.c.), every other day, for 40 days, with or without a concomitant treatment with daily injections of PAS (25 mg/kg, i.p.). Catalepsy, open field, oral movements, and plus-maze discriminative avoidance evaluations were performed across treatment, and immunohistochemistry for tyrosine hydroxylase was conducted at the end. The results showed that PAS treatment delayed the onset of motor impairments and prevented the occurrence of increased catalepsy behavior in the premotor phase. However, PAS administration did not modify reserpine-induced cognitive impairments. Moreover, PAS prevented the decrease in tyrosine hydroxylase immunostaining in the substantia nigra pars compacta (SNpc) induced by reserpine. Taken together, our results suggested that PAS exerted a neuroprotective effect in a progressive model of PD.
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Cunha AS, Matheus FC, Moretti M, Sampaio TB, Poli A, Santos DB, Colle D, Cunha MP, Blum-Silva CH, Sandjo LP, Reginatto FH, Rodrigues ALS, Farina M, Prediger RD. Agmatine attenuates reserpine-induced oral dyskinesia in mice: Role of oxidative stress, nitric oxide and glutamate NMDA receptors. Behav Brain Res 2016; 312:64-76. [DOI: 10.1016/j.bbr.2016.06.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 06/03/2016] [Accepted: 06/07/2016] [Indexed: 11/29/2022]
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Peres FF, Levin R, Suiama MA, Diana MC, Gouvêa DA, Almeida V, Santos CM, Lungato L, Zuardi AW, Hallak JEC, Crippa JA, Vânia D, Silva RH, Abílio VC. Cannabidiol Prevents Motor and Cognitive Impairments Induced by Reserpine in Rats. Front Pharmacol 2016; 7:343. [PMID: 27733830 PMCID: PMC5040118 DOI: 10.3389/fphar.2016.00343] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 09/13/2016] [Indexed: 12/29/2022] Open
Abstract
Cannabidiol (CBD) is a non-psychotomimetic compound from Cannabis sativa that presents antipsychotic, anxiolytic, anti-inflammatory, and neuroprotective effects. In Parkinson's disease patients, CBD is able to attenuate the psychotic symptoms induced by L-DOPA and to improve quality of life. Repeated administration of reserpine in rodents induces motor impairments that are accompanied by cognitive deficits, and has been applied to model both tardive dyskinesia and Parkinson's disease. The present study investigated whether CBD administration would attenuate reserpine-induced motor and cognitive impairments in rats. Male Wistar rats received four injections of CBD (0.5 or 5 mg/kg) or vehicle (days 2-5). On days 3 and 5, animals received also one injection of 1 mg/kg reserpine or vehicle. Locomotor activity, vacuous chewing movements, and catalepsy were assessed from day 1 to day 7. On days 8 and 9, we evaluated animals' performance on the plus-maze discriminative avoidance task, for learning/memory assessment. CBD (0.5 and 5 mg/kg) attenuated the increase in catalepsy behavior and in oral movements - but not the decrease in locomotion - induced by reserpine. CBD (0.5 mg/kg) also ameliorated the reserpine-induced memory deficit in the discriminative avoidance task. Our data show that CBD is able to attenuate motor and cognitive impairments induced by reserpine, suggesting the use of this compound in the pharmacotherapy of Parkinson's disease and tardive dyskinesia.
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Affiliation(s)
- Fernanda F Peres
- Interdisciplinary Laboratory of Clinical Neurosciences, Department of Psychiatry, Federal University of São PauloSão Paulo, Brazil; Department of Pharmacology, Federal University of São PauloSão Paulo, Brazil
| | - Raquel Levin
- Interdisciplinary Laboratory of Clinical Neurosciences, Department of Psychiatry, Federal University of São PauloSão Paulo, Brazil; Department of Pharmacology, Federal University of São PauloSão Paulo, Brazil
| | - Mayra A Suiama
- Interdisciplinary Laboratory of Clinical Neurosciences, Department of Psychiatry, Federal University of São PauloSão Paulo, Brazil; Department of Pharmacology, Federal University of São PauloSão Paulo, Brazil
| | - Mariana C Diana
- Interdisciplinary Laboratory of Clinical Neurosciences, Department of Psychiatry, Federal University of São PauloSão Paulo, Brazil; Department of Pharmacology, Federal University of São PauloSão Paulo, Brazil
| | - Douglas A Gouvêa
- Interdisciplinary Laboratory of Clinical Neurosciences, Department of Psychiatry, Federal University of São PauloSão Paulo, Brazil; Department of Pharmacology, Federal University of São PauloSão Paulo, Brazil
| | - Valéria Almeida
- Interdisciplinary Laboratory of Clinical Neurosciences, Department of Psychiatry, Federal University of São PauloSão Paulo, Brazil; Department of Pharmacology, Federal University of São PauloSão Paulo, Brazil
| | - Camila M Santos
- Interdisciplinary Laboratory of Clinical Neurosciences, Department of Psychiatry, Federal University of São PauloSão Paulo, Brazil; Department of Pharmacology, Federal University of São PauloSão Paulo, Brazil
| | - Lisandro Lungato
- Department of Psychobiology, Federal University of São Paulo São Paulo, Brazil
| | - Antônio W Zuardi
- Department of Neuroscience and Behavior, University of São PauloRibeirão Preto, Brazil; National Institute for Translational Medicine - National Council for Scientific and Technological DevelopmentRibeirão Preto, Brazil
| | - Jaime E C Hallak
- Department of Neuroscience and Behavior, University of São PauloRibeirão Preto, Brazil; National Institute for Translational Medicine - National Council for Scientific and Technological DevelopmentRibeirão Preto, Brazil
| | - José A Crippa
- Department of Neuroscience and Behavior, University of São PauloRibeirão Preto, Brazil; National Institute for Translational Medicine - National Council for Scientific and Technological DevelopmentRibeirão Preto, Brazil
| | - D'Almeida Vânia
- Department of Psychobiology, Federal University of São Paulo São Paulo, Brazil
| | - Regina H Silva
- Department of Pharmacology, Federal University of São Paulo São Paulo, Brazil
| | - Vanessa C Abílio
- Interdisciplinary Laboratory of Clinical Neurosciences, Department of Psychiatry, Federal University of São PauloSão Paulo, Brazil; Department of Pharmacology, Federal University of São PauloSão Paulo, Brazil
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de Freitas CM, Busanello A, Schaffer LF, Peroza LR, Krum BN, Leal CQ, Ceretta APC, da Rocha JBT, Fachinetto R. Behavioral and neurochemical effects induced by reserpine in mice. Psychopharmacology (Berl) 2016; 233:457-67. [PMID: 26514557 DOI: 10.1007/s00213-015-4118-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 10/15/2015] [Indexed: 01/11/2023]
Abstract
RATIONALE Reserpine, a monoamine-depleting agent, which irreversibly and non-selectively blocks the vesicular monoamine transporter, has been used as an animal model to study several neurological disorders, including tardive dyskinesia and Parkinson's disease. OBJECTIVE The purpose of this study was to examine if motor deficits induced by reserpine in mice could be related to alterations in the expression of dopaminergic system proteins such as tyrosine hydroxylase (TH) and dopamine transporter (DAT) and in the activity of monoamine oxidase (MAO). METHODS Mice received either vehicle or reserpine (0.1, 0.5, or 1 mg/kg, s.c.) for four consecutive days. Two, 20, or 60 days after reserpine withdrawal, behavioral, and neurochemical changes were evaluated. RESULTS Reserpine at a dose of 0.5 and 1 mg/kg increased vacuous chewing movements (VCMs) and reduced locomotion. Behavioral changes were accompanied by reduction in TH immunoreactivity in the striatum evaluated on days 2 and 20 after the last injection of 1 mg/kg reserpine. Furthermore, negative correlations were found between VCM and MAO-A or MAO-B on day 2 and TH striatal immunoreactivity on day 20 after the last injection of 1 mg/kg reserpine. A positive correlation was observed between VCMs and DAT immunoreactivity in the substantia nigra on day 2 after the last injection of 0.5 mg/kg reserpine. CONCLUSIONS These findings suggest that the pharmacological blockage of vesicular monoamine transporter (VMAT) by reserpine caused neurochemical and behavioral alterations in mice.
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Affiliation(s)
- Catiuscia Molz de Freitas
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Alcindo Busanello
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Larissa Finger Schaffer
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Luis Ricardo Peroza
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Bárbara Nunes Krum
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | | | | | - João Batista Teixeira da Rocha
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Roselei Fachinetto
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil. .,Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil. .,Departamento de Fisiologia e Farmacologia, Centro de Ciências da Saúde, 97105-900, Santa Maria, RS, Brazil.
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Beneficial effects of EGb761 and vitamin E on haloperidol-induced vacuous chewing movements in rats: Possible involvement of S100B mechanisms. Behav Brain Res 2016; 297:124-30. [DOI: 10.1016/j.bbr.2015.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 09/29/2015] [Accepted: 10/03/2015] [Indexed: 01/09/2023]
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Kronbauer M, Segat HJ, De David Antoniazzi CT, Roversi K, Roversi K, Pase CS, Barcelos RCS, Burger ME. Magnesium Supplementation Prevents and Reverses Experimentally Induced Movement Disturbances in Rats: Biochemical and Behavioral Parameters. Biol Trace Elem Res 2015; 166:163-72. [PMID: 25686766 DOI: 10.1007/s12011-015-0268-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 02/04/2015] [Indexed: 10/24/2022]
Abstract
Reserpine administration results in a predictable animal model of orofacial dyskinesia (OD) that has been largely used to access movement disturbances related to extrapyramidal oxidative damage. Here, OD was acutely induced by reserpine (two doses of 0.7 mg/kg subcutaneous (s.c.)), every other day for 3 days), which was administered after (experiment 1) and before (experiment 2) magnesium (Mg) supplementation (40 mg/kg/mL, peroral (p.o.)). In experiment 1, Mg was administered for 28 days before reserpine treatment, while in experiment 2, it was initiated 24 h after the last reserpine administration and was maintained for 10 consecutive days. Experiment 1 (prevention) showed that Mg supplementation was able to prevent reserpine-induced OD and catalepsy development. Mg was also able to prevent reactive species (RS) generation, thus preventing increase of protein carbonyl (PC) levels in both cortex and substantia nigra, but not in striatum. Experiment 2 (reversion) showed that Mg was able to decrease OD and catalepsy at all times assessed. In addition, Mg was able to decrease RS generation, with lower levels of PC in both cortex and striatum, but not in substantia nigra. These outcomes indicate that Mg is an important metal that should be present in the diet, since its intake is able to prevent and minimize the development of movement disorders closely related to oxidative damage in the extrapyramidal brain areas, such as OD.
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Affiliation(s)
- Maikel Kronbauer
- Programa de Pós-Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, 97105-900, Brazil
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Leão AH, Sarmento‐Silva AJ, Santos JR, Ribeiro AM, Silva RH. Molecular, Neurochemical, and Behavioral Hallmarks of Reserpine as a Model for Parkinson's Disease: New Perspectives to a Long-Standing Model. Brain Pathol 2015; 25:377-90. [PMID: 25726735 PMCID: PMC8029054 DOI: 10.1111/bpa.12253] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 02/23/2015] [Indexed: 12/12/2022] Open
Abstract
The administration of reserpine to rodents was one of the first models used to investigate the pathophysiology and screening for potential treatments of Parkinson's disease (PD). The reserpine model was critical to the understanding of the role of monoamine system in the regulation of motor and affective disorders, as well as the efficacy of current PD treatments, such as L-DOPA and dopamine agonists. Nevertheless, with the introduction of toxin-induced and genetic models of PD, reserpine became underused. The main rationale to this drawback was the supposed absence of reserpine construct validity with PD. Here, we highlight classical and recent experimental findings that support the face, pharmacological, and construct validity of reserpine PD model and reason against the current rationale for its underuse. We also aim to shed a new perspective upon the model by discussing the main challenges and potentials for the reserpine model of PD.
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Affiliation(s)
- Anderson H.F.F. Leão
- Memory Studies LaboratoryDepartment of PhysiologyUniversidade Federal do Rio Grande do NorteNatalRNBrazil
| | - Aldair J. Sarmento‐Silva
- Memory Studies LaboratoryDepartment of PhysiologyUniversidade Federal do Rio Grande do NorteNatalRNBrazil
| | - José R. Santos
- Biology DepartmentUniversidade Federal de SergipeSão CristóvãoSEBrazil
| | - Alessandra M. Ribeiro
- Memory Studies LaboratoryDepartment of PhysiologyUniversidade Federal do Rio Grande do NorteNatalRNBrazil
- Department of BiosciencesUniversidade Federal de São PauloSantosSPBrazil
| | - Regina H. Silva
- Memory Studies LaboratoryDepartment of PhysiologyUniversidade Federal do Rio Grande do NorteNatalRNBrazil
- Behavioral Neuroscience LaboratoryDepartment of PharmacologyUniversidade Federal de São PauloSão PauloSPBrazil
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Minor TR, Hanff TC. Adenosine signaling in reserpine-induced depression in rats. Behav Brain Res 2015; 286:184-91. [DOI: 10.1016/j.bbr.2015.02.032] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 02/11/2015] [Accepted: 02/16/2015] [Indexed: 02/05/2023]
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Wang MH, Lin RF, Tseng HC, Soung HS, Chang KC, Tsai CC. (-) Epigallocatechin-3-gallate attenuates reserpine-induced orofacial dyskinesia and oxidative stress in rat striatum. Pharmacol Biochem Behav 2015; 131:71-6. [PMID: 25668129 DOI: 10.1016/j.pbb.2015.02.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 01/21/2015] [Accepted: 02/02/2015] [Indexed: 11/19/2022]
Abstract
Reserpine-induced orofacial dyskinesia (OD) has been used for decades as an animal model for human tardive dyskinesia (TD) because both of them have pathophysiology strongly associated with striatal oxidative stress. Green tea catechins, especially (-) epigallocatechin-3-gallate (EGCG), have potent antioxidative effects and are able to protect against various oxidative injuries. In this study, we examined the potential protective effects of EGCG on reserpine-induced behavioral and neurochemical dysfunction in rats. Reserpine treatment (1mg/kgs.c. one injection every other day, three injections total) induced significant increases (p<0.001) in the frequency of vacuous chewing movement (VCM) and tongue protrusion (TP) as well as the duration of facial twitching (FT). EGCG treatment (100mg/kgi.p. for 11days, starting 7days before the reserpine injections) was able to prevent most of the reserpine-induced OD. Also, EGCG treatment was able to reduce the reserpine-induced lipid peroxidation (LPO) production, and enhances the antioxidation power in the striatum of reserpine-treated rats. The above results indicate that EGCG has a protective role against reserpine-induced OD, probably via its powerful antioxidative properties. Thus, EGCG may possible have a clinically relevant therapeutic effect in preventing, delaying or even treating TD.
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Affiliation(s)
- Mao-Hsien Wang
- Department of Anesthesia, En Chu Kon Hospital, Sanshia District, New Taipei City 23702, Taiwan, ROC; Department of Optometry, Yuanpei University, Hsinchu 30015, Taiwan, ROC
| | - Rui-Feng Lin
- Department of Neurosurgery, Mackay Memorial Hospital, Taipei 10449, Taiwan, ROC
| | - Hsiang-Chien Tseng
- Department of Anesthesiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei 11101, Taiwan, ROC; School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan, ROC
| | - Hung-Sheng Soung
- Department of Psychiatry, Yuan-Shan br. of Taipei Veteran General Hospital, Yilan County 26604, Taiwan, ROC
| | - Kuo-Chi Chang
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan, ROC
| | - Cheng-Chia Tsai
- Department of Neurosurgery, Mackay Memorial Hospital, Taipei 10449, Taiwan, ROC; Graduate Institute of Injury Prevention and Control, Taipei Medical University, Taipei 11031, Taiwan, ROC.
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18
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Di Curzio DL, Turner-Brannen E, Del Bigio MR. Oral antioxidant therapy for juvenile rats with kaolin-induced hydrocephalus. Fluids Barriers CNS 2014; 11:23. [PMID: 25324960 PMCID: PMC4199774 DOI: 10.1186/2045-8118-11-23] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 09/23/2014] [Indexed: 12/31/2022] Open
Abstract
Background Oxidative and nitrosylative changes have been shown to occur in conjunction with the hypoxic changes and cellular/axonal damage in hydrocephalic rodent brains. We hypothesized that antioxidant therapy would improve behavioral, neurophysiological, and/or neurobiochemical outcomes in juvenile rats following induction of hydrocephalus. Methods Three-week old rats received an injection of kaolin (aluminum silicate) into the cisterna magna. Magnetic resonance (MR) imaging was performed two weeks later to assess ventricle size and stratify rats to four treatment conditions. Rats were treated for two weeks daily with sham therapy of either oral canola oil or dextrose or experimental therapy of a low or high dose of an antioxidant mixture containing α-tocopherol, L-ascorbic acid, coenzyme Q10 (CoQ10), reduced glutathione, and reduced lipoic acid. Behavior was examined thrice weekly. Results All hydrocephalic groups lagged in weight gain in comparison to non-hydrocephalic controls, all developed significant ventriculomegaly, and all exhibited white matter destruction. Canola oil with or without the antioxidant mixture normalized antioxidant capacity in brain tissue, and the dextrose-treated rats had the greatest ventricular enlargement during the treatment period. However, there were no significant differences between the four treatment groups of hydrocephalic rats for the various behavioral tasks. Glial fibrillary acidic protein and myelin basic protein quantitation showed no differences between the treatment groups or with control rats. There was increased lipid peroxidation in the hydrocephalic rats compared to controls but no differences between treatment groups. Conclusion The antioxidant cocktail showed no therapeutic benefits for juvenile rats with kaolin-induced hydrocephalus although canola oil might have mild benefit.
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Affiliation(s)
- Domenico L Di Curzio
- Departments of Human Anatomy & Cell Science, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada ; Manitoba Institute of Child Health, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada
| | - Emily Turner-Brannen
- Manitoba Institute of Child Health, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada
| | - Marc R Del Bigio
- Manitoba Institute of Child Health, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada ; Department of Pathology, University of Manitoba, 727 McDermot Avenue, Winnipeg, R3E 3P5, Canada
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Saito LP, Fukushiro DF, Hollais AW, Mári-Kawamoto E, Costa JM, Berro LF, Aramini TCF, Wuo-Silva R, Andersen ML, Tufik S, Frussa-Filho R. Acute total sleep deprivation potentiates amphetamine-induced locomotor-stimulant effects and behavioral sensitization in mice. Pharmacol Biochem Behav 2013; 117:7-16. [PMID: 24316348 DOI: 10.1016/j.pbb.2013.11.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 11/13/2013] [Accepted: 11/23/2013] [Indexed: 01/05/2023]
Abstract
It has been demonstrated that a prolonged period (48 h) of paradoxical sleep deprivation (PSD) potentiates amphetamine (AMP)-induced behavioral sensitization, an animal model of addiction-related neuroadaptations. In the present study, we examined the effects of an acute short-term deprivation of total sleep (TSD) (6h) on AMP-induced behavioral sensitization in mice and compared them to the effects of short-term PSD (6 h). Three-month-old male C57BL/6J mice underwent TSD (experiment 1-gentle handling method) or PSD (experiment 2-multiple platforms method) for 6 h. Immediately after the sleep deprivation period, mice were tested in the open field for 10 min under the effects of saline or 2.0 mg/kg AMP. Seven days later, to assess behavioral sensitization, all of the mice received a challenge injection of 2.0 mg/kg AMP and were tested in the open field for 10 min. Total, peripheral, and central locomotion, and grooming duration were measured. TSD, but not PSD, potentiated the hyperlocomotion induced by an acute injection of AMP and this effect was due to an increased locomotion in the central squares of the apparatus. Similarly, TSD facilitated the development of AMP-induced sensitization, but only in the central locomotion parameter. The data indicate that an acute period of TSD may exacerbate the behavioral effects of AMP in mice. Because sleep architecture is composed of paradoxical and slow wave sleep, and 6-h PSD had no effects on AMP-induced hyperlocomotion or sensitization, our data suggest that the deprivation of slow wave sleep plays a critical role in the mechanisms that underlie the potentiating effects of TSD on both the acute and sensitized addiction-related responses to AMP.
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Affiliation(s)
- Luis P Saito
- Department of Psychobiology, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04024002 São Paulo, SP, Brazil
| | - Daniela F Fukushiro
- Department of Pharmacology, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1º andar, 04023062 São Paulo, SP, Brazil; Department of Psychology, Florida State University, 1107 W. Call St, 32304 Tallahassee, FL, USA.
| | - André W Hollais
- Department of Pharmacology, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1º andar, 04023062 São Paulo, SP, Brazil
| | - Elisa Mári-Kawamoto
- Department of Pharmacology, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1º andar, 04023062 São Paulo, SP, Brazil
| | - Jacqueline M Costa
- Department of Pharmacology, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1º andar, 04023062 São Paulo, SP, Brazil
| | - Laís F Berro
- Department of Psychobiology, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04024002 São Paulo, SP, Brazil
| | - Tatiana C F Aramini
- Department of Pharmacology, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1º andar, 04023062 São Paulo, SP, Brazil
| | - Raphael Wuo-Silva
- Department of Pharmacology, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1º andar, 04023062 São Paulo, SP, Brazil
| | - Monica L Andersen
- Department of Psychobiology, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04024002 São Paulo, SP, Brazil
| | - Sergio Tufik
- Department of Psychobiology, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04024002 São Paulo, SP, Brazil
| | - Roberto Frussa-Filho
- Department of Psychobiology, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04024002 São Paulo, SP, Brazil; Department of Pharmacology, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1º andar, 04023062 São Paulo, SP, Brazil
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20
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Takatsu-Coleman AL, Zanin KA, Patti CL, Zager A, Lopes-Silva LB, Longo BM, Tufik S, Andersen ML, Frussa-Filho R. Short-term sleep deprivation reinstates memory retrieval in mice: the role of corticosterone secretion. Psychoneuroendocrinology 2013; 38:1967-78. [PMID: 23545263 DOI: 10.1016/j.psyneuen.2013.02.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 01/23/2013] [Accepted: 02/27/2013] [Indexed: 10/27/2022]
Abstract
While the effects of sleep deprivation (SD) on the acquisition and consolidation phases of memory have been extensively characterized, its effects on memory retrieval remain overlooked. SD alone is a stressor, and stress-activated glucocorticoids promote bimodal effects on memory. Because we have recently demonstrated that 72h SD impairs memory retrieval in the plus-maze discriminative avoidance task (PM-DAT) in mice, this study investigated whether shorter SD periods would facilitate retrieval. In Experiment I, the temporal forgetting curve of the PM-DAT was determined and an interval between training/testing in which retrieval was no longer present was used in all subsequent experiments. In Experiments II and III, retrieval performance and corticosterone concentration, respectively, were quantified in mice that were sleep deprived for 12 or 24h before testing. In Experiments IV and V, the effects of the corticosterone synthesis inhibitor metyrapone were evaluated on 12h SD-induced retrieval reinstatement and corticosterone concentration enhancement, respectively. Experiment VI determined whether pre-test acute administration of exogenous corticosterone would mimic the facilitatory effects of 12h SD on retrieval. Thirty days after training, mice presented poor performance of the task; however, SD for 12h (but not for 24) before testing reinstated memory retrieval. This facilitatory effect was accompanied by increased corticosterone concentration, abolished by metyrapone, and mimicked by pre-test acute corticosterone administration. Collectively, short-term SD can facilitate memory retrieval by enhancing corticosterone secretion. This facilitatory effect is abolished by longer periods of SD.
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Affiliation(s)
- André L Takatsu-Coleman
- Departamento de Farmacologia, Universidade Federal de São Paulo, Rua Botucatu 862, Ed. Leal Prado, 1(o) andar, 04023062 São Paulo, SP, Brazil
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Peroza LR, Busanello A, Leal CQ, Röpke J, Boligon AA, Meinerz D, Libardoni M, Athayde ML, Fachinetto R. Bauhinia forficata Prevents Vacuous Chewing Movements Induced by Haloperidol in Rats and Has Antioxidant Potential In Vitro. Neurochem Res 2013; 38:789-96. [DOI: 10.1007/s11064-013-0981-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 01/15/2013] [Accepted: 01/22/2013] [Indexed: 12/23/2022]
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Gallic acid decreases vacuous chewing movements induced by reserpine in rats. Pharmacol Biochem Behav 2013; 104:132-7. [PMID: 23313549 DOI: 10.1016/j.pbb.2013.01.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 12/26/2012] [Accepted: 01/03/2013] [Indexed: 11/23/2022]
Abstract
Involuntary oral movements are present in several diseases and pharmacological conditions; however, their etiology and efficient treatments remain unclear. Gallic acid is a natural polyphenolic acid found in gall nuts, sumac, oak bark, tea leaves, grapes and wine, with potent antioxidant and antiapoptotic activity. Thus, the present study investigated the effects of gallic acid on vacuous chewing movements (VCMs) in an animal model induced by reserpine. Rats received either vehicle or reserpine (1mg/kg/day, s.c.) during three days, followed by treatment with water or different doses of gallic acid (4.5, 13.5 or 40.5mg/kg/day, p.o.) for three more days. As result, reserpine increased the number of VCMs in rats, and this effect was maintained for at least three days after its withdrawal. Gallic acid at two different doses (13.5 and 40.5mg/kg/day) has reduced VCMs in rats previously treated with reserpine. Furthermore, we investigated oxidative stress parameters (DCFH-DA oxidation, TBARS and thiol levels) and Na(+),K(+)-ATPase activity in striatum and cerebral cortex, however, no changes were observed. These findings show that gallic acid may have promissory use in the treatment of involuntary oral movements.
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23
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Fukushiro DF, Josino FS, Saito LP, Costa JM, Zanlorenci LHF, Berro LF, Fernandes-Santos L, Morgado F, Mári-Kawamoto E, Frussa-Filho R. Differential effects of intermittent and continuous exposure to novel environmental stimuli on the development of amphetamine-induced behavioral sensitization in mice: implications for addiction. Drug Alcohol Depend 2012; 124:135-41. [PMID: 22296920 DOI: 10.1016/j.drugalcdep.2011.12.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 12/22/2011] [Accepted: 12/30/2011] [Indexed: 01/28/2023]
Abstract
BACKGROUND Previous studies have demonstrated a preventive effect of continuous environmental enrichment during early development on the vulnerability of rodents to drug addiction-related behaviors. Recently, it was demonstrated that a continuous environmental enrichment could eliminate already established addiction-related behaviors in mice. The present study compared the effects of intermittent or continuous exposure to novel stimuli during repeated amphetamine (Amp) treatment on the development of behavioral sensitization (an animal model of addiction-related neuroadaptations) in adult mice. METHODS Three-month-old male Swiss mice were treated with 2.5mg/kg Amp every other day for 13 days in their home cages. Novel objects were presented in their home cages for 2h on non-drug treatment days (experiment 1) or for 24h/day during the 13 days of drug treatment (experiment 2). Seven days after the drug treatment had finished, the mice were challenged with 2.5mg/kg Amp, and their locomotor activity was quantified in a familiar open field for 10 min. RESULTS Intermittent exposure to the novel objects did not modify the acute Amp locomotor stimulatory effect but potentiated the development of Amp-induced locomotor sensitization. This enhanced sensitization was due to increased locomotion in the central squares of the apparatus, which suggests anxiolysis or increased impulsiveness. Conversely, continuous exposure to the novel objects potentiated the acute Amp locomotor stimulatory effect and blunted the development of Amp-induced locomotor sensitization. CONCLUSIONS We conclude that addiction-related behaviors can be differentially and critically modified depending on the schedule and period of the novelty exposure.
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Affiliation(s)
- Daniela F Fukushiro
- Department of Pharmacology, Universidade Federal de São Paulo, R Botucatu, 862, Ed Leal Prado, 1° andar, 04023062 São Paulo, SP, Brazil
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24
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Fernandes VS, Santos JR, Leão AH, Medeiros AM, Melo TG, Izídio GS, Cabral A, Ribeiro RA, Abílio VC, Ribeiro AM, Silva RH. Repeated treatment with a low dose of reserpine as a progressive model of Parkinson's disease. Behav Brain Res 2012; 231:154-63. [DOI: 10.1016/j.bbr.2012.03.008] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 03/06/2012] [Accepted: 03/07/2012] [Indexed: 11/26/2022]
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25
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Resveratrol reduces vacuous chewing movements induced by acute treatment with fluphenazine. Pharmacol Biochem Behav 2012; 101:307-10. [DOI: 10.1016/j.pbb.2012.01.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 01/04/2012] [Accepted: 01/06/2012] [Indexed: 01/08/2023]
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26
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Dawson DR. Toxins and adverse drug reactions affecting the equine nervous system. Vet Clin North Am Equine Pract 2011; 27:507-26. [PMID: 22100042 DOI: 10.1016/j.cveq.2011.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This article provides an overview of the more common toxins and adverse drug reactions, along with more rare toxins and reactions (Table 1), that result in neurologic dysfunction in horses. A wide variety of symptoms, treatments, and outcomes are seen with toxic neurologic disease in horses. An in-depth history and thorough physical examination are needed to determine if a toxin or adverse drug reaction is responsible for the clinical signs. Once a toxin or adverse drug reaction is identified, the specific antidote, if available, and supportive care should be administered promptly.
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Affiliation(s)
- Dominic R Dawson
- William Pritchard Veterinary Medical Teaching Hospital, University of California, Davis, One Garrod Avenue, Davis, CA 95616, USA.
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27
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Teixeira AM, Dias VT, Pase CS, Roversi K, Boufleur N, Barcelos RCS, Benvegnú DM, Trevizol F, Dolci GS, Carvalho NR, Quatrin A, Soares FAA, Reckziegel P, Segat HJ, Rocha JBT, Emanuelli T, Bürger ME. Could dietary trans fatty acids induce movement disorders? Effects of exercise and its influence on Na⁺K⁺-ATPase and catalase activity in rat striatum. Behav Brain Res 2011; 226:504-10. [PMID: 22004982 DOI: 10.1016/j.bbr.2011.10.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 09/30/2011] [Accepted: 10/03/2011] [Indexed: 11/18/2022]
Abstract
The influence of trans fatty acids (FA) on development of orofacial dyskinesia (OD) and locomotor activity was evaluated. Rats were fed with diets enriched with 20% soybean oil (SO; n-6 FA), lard (L; saturated FA) or hydrogenated vegetable fat (HVF; trans FA) for 60 weeks. In the last 12 weeks each group was subdivided into sedentary and exercised (swimming). Brains of HVF and L-fed rats incorporated 0.33% and 0.20% of trans FA, respectively, while SO-fed group showed no incorporation of trans FA. HVF increased OD, while exercise exacerbated this in L and HVF-fed rats. HVF and L reduced locomotor activity, and exercise did not modify. Striatal catalase activity was reduced by L and HVF, but exercise increased its activity in the HVF-fed group. Na(+)K(+)-ATPase activity was not modified by dietary FA, however it was increased by exercise in striatum of SO and L-fed rats. We hypothesized that movement disorders elicited by HVF and less by L could be related to increased dopamine levels in striatum, which have been related to chronic trans FA intake. Exercise increased OD possibly by increase of brain dopamine levels, which generates pro-oxidant metabolites. Thus, a long-term intake of trans FA caused a small but significant brain incorporation of trans FA, which favored development of movement disorders. Exercise worsened behavioral outcomes of HVF and L-fed rats and increased Na(+)K(+)-ATPase activity of L and SO-fed rats, indicating its benefits. HVF blunted beneficial effects of exercise, indicating a critical role of trans FA in brain neurochemistry.
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Affiliation(s)
- A M Teixeira
- Programa de Pós-Graduação em Farmacologia-Universidade Federal de Santa Maria-RS, Brazil
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28
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Wuo-Silva R, Fukushiro DF, Borçoi AR, Fernandes HA, Procópio-Souza R, Hollais AW, Santos R, Ribeiro LTC, Corrêa JMRM, Talhati F, Saito LP, Aramini TCF, Kameda SR, Bittencourt LRA, Tufik S, Frussa-Filho R. Addictive potential of modafinil and cross-sensitization with cocaine: a pre-clinical study. Addict Biol 2011; 16:565-79. [PMID: 21790900 DOI: 10.1111/j.1369-1600.2011.00341.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Repeated or even a single exposure to drugs of abuse can lead to persistent locomotor sensitization, which is the result of an abundance of neuroplastic changes occurring within the circuitry involved in motivational behavior and is thought to play a key role in certain aspects of drug addiction. There is substantial controversy about the addictive potential of modafinil, a wake-promoting drug used to treat narcolepsy that is increasingly being used as a cognitive enhancer and has been proposed as a pharmacotherapy for cocaine dependence. Male mice were used to investigate the ability of modafinil to induce locomotor sensitization after repeated or single administration in mice. Bidirectional cross-sensitization with cocaine and modafinil-induced conditioned place preference were also evaluated. Both repeated and single exposure to moderate and high doses of modafinil produced a pronounced locomotor sensitization that cross-sensitized in a bidirectional way with cocaine. Remarkably, when cocaine and modafinil were repeatedly administered sequentially, their behavioral sensitization was additive. Supporting these behavioral sensitization data, modafinil produced a pronounced conditioned place preference in the mouse. Taken together, the present findings provide pre-clinical evidence for the addictive potential of modafinil. Our data also strongly suggest that similar neural substrates are involved in the psychomotor/rewarding effects of modafinil and cocaine.
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Chronic amphetamine transforms the emotional significance of a novel but not a familiar environment: implications for addiction. Int J Neuropsychopharmacol 2011; 14:955-65. [PMID: 21156091 DOI: 10.1017/s1461145710001379] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Both drug-induced locomotor sensitization and reactivity to novelty in rodents have been related to drug-craving mechanisms in humans. We investigated whether the exposure to a completely novel environment would modulate the expression of locomotor sensitization induced by repeated administration of amphetamine (Amp) in mice. In addition to locomotion, different open-field behavioural parameters were used to evaluate the possible involvement of anxiogenic-like effects induced by Amp, novelty or a combination of the two. In order to avoid misinterpretations due to different locomotor baseline conditions, we used an open-field illumination condition in which previous exposure to the apparatus did not modify locomotion (although it reliably increased grooming behaviour). Acute Amp administration increased locomotion in mice previously habituated to the open field (Hab) but not in mice exposed to the apparatus for the first time (Nov). This absence of Amp-induced locomotor activation in Nov mice may be related to higher anxiety-like levels, because these animals displayed longer freezing duration. However, only Nov mice developed locomotor sensitization. Because Amp challenge in Amp pre-treated Nov mice did not induce an increase in freezing behaviour, the locomotor sensitization in Nov mice might be related to the tolerance of Amp-induced anxiogenic-like behaviour in novel environments. Repeated Amp administration increased motivation to explore the environment in Nov mice in that these animals presented a within-session locomotion-habituation deficit. Our data suggest that a complex and plastic interaction between the anxiogenic and motivational properties of both novelty and Amp can critically modify the behavioural expression of craving-related mechanisms.
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Valeriana officinalis ameliorates vacuous chewing movements induced by reserpine in rats. J Neural Transm (Vienna) 2011; 118:1547-57. [DOI: 10.1007/s00702-011-0640-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Accepted: 03/23/2011] [Indexed: 12/23/2022]
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Rosa EF, Ribeiro RF, Pereira FMT, Freymüller E, Aboulafia J, Nouailhetas VLA. Vitamin C and E supplementation prevents mitochondrial damage of ileum myocytes caused by intense and exhaustive exercise training. J Appl Physiol (1985) 2009; 107:1532-8. [PMID: 19696358 DOI: 10.1152/japplphysiol.91166.2008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Intense and exhaustive exercise (IEE) is associated with oxidative stress in skeletal muscle, and we recently reported that intestine is sensitive to IEE. In the present study, we investigated the possible relationship between the effects of IEE on morphology and oxidative markers in the ileum and isolated mitochondria. C57BL/6 mice were ascribed either to a control group comprising two subgroups, one sedentary and another exercised for 10 days (E10), or to a corresponding supplemented control group again comprising two subgroups, one sedentary and another exercised for 10 days (E10-V). The IEE program consisted of a single daily treadmill running session at 85% of V(max), until animal exhaustion. Vitamins C (10 mg/kg) and E (10 mg/kg) were concurrently intraperitoneally administered 2 h before the exercise sessions. IEE was shown to cause 1) impairment of ileum internal membrane mitochondria verified by ultramicrography analysis; 2) increase in ileum carbonyl content (117%) and reduction in antioxidant capacity (36%); 3) increase in mitochondria carbonyl content (38%), increase in the percentage of ruptured mitochondria (25.3%), increase in superoxide dismutase activity (186%), and reduction in citrate synthase activity (40.4%) compared with control animals. Observations in the vitamin-supplemented exercised animals (E10-V) were 1) healthy appearance of myocyte mitochondria; 2) decrease in ileum carbonyl content (66%) and increase in antioxidant capacity (53%); 3) decrease in mitochondria carbonyl content (43%), decrease in the percentage of ruptured mitochondria (30%), slight increase in superoxide dismutase activity (7%), and significant increase in citrate synthase activity (121%) compared with E10 animals. Therefore, the present results strongly corroborate the hypothesis that IEE leads to marked disturbances in intestinal mitochondria, mainly in redox status, and affects whole intestinal redox status.
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Affiliation(s)
- Eloi F Rosa
- Dept. of Biophysics, Universidade Federal de São Paulo-Campus São Paulo, São Paulo, Brazil
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Thaakur S, Himabindhu G. Effect of alpha lipoic acid on the tardive dyskinesia and oxidative stress induced by haloperidol in rats. J Neural Transm (Vienna) 2009; 116:807-14. [DOI: 10.1007/s00702-009-0232-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Accepted: 04/21/2009] [Indexed: 11/30/2022]
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Teixeira AM, Reckziegel P, Müller L, Pereira RP, Roos DH, Rocha JB, Bürger ME. Intense exercise potentiates oxidative stress in striatum of reserpine-treated animals. Pharmacol Biochem Behav 2009; 92:231-5. [DOI: 10.1016/j.pbb.2008.11.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2008] [Revised: 11/07/2008] [Accepted: 11/25/2008] [Indexed: 11/16/2022]
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Old mice present increased levels of succinate dehydrogenase activity and lower vulnerability to dyskinetic effects of 3-nitropropionic acid. Pharmacol Biochem Behav 2009; 91:327-32. [DOI: 10.1016/j.pbb.2008.08.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2007] [Revised: 07/24/2008] [Accepted: 08/04/2008] [Indexed: 11/20/2022]
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Fachinetto R, Villarinho JG, Wagner C, Pereira RP, Avila DS, Burger ME, Calixto JB, Rocha JBT, Ferreira J. Valeriana officinalis does not alter the orofacial dyskinesia induced by haloperidol in rats: role of dopamine transporter. Prog Neuropsychopharmacol Biol Psychiatry 2007; 31:1478-86. [PMID: 17669571 DOI: 10.1016/j.pnpbp.2007.06.028] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2007] [Revised: 06/25/2007] [Accepted: 06/27/2007] [Indexed: 10/23/2022]
Abstract
Chronic treatment with classical neuroleptics in humans can produce a serious side effect, known as tardive dyskinesia (TD). Here, we examined the effects of V. officinalis, a medicinal herb widely used as calming and sleep-promoting, in an animal model of orofacial dyskinesia (OD) induced by long-term treatment with haloperidol. Adult male rats were treated during 12 weeks with haloperidol decanoate (38 mg/kg, i.m., each 28 days) and with V. officinalis (in the drinking water). Vacuous chewing movements (VCMs), locomotor activity and plus maze performance were evaluated. Haloperidol treatment produced VCM in 40% of the treated rats and the concomitant treatment with V. officinalis did not alter either prevalence or intensity of VCMs. The treatment with V. officinalis increased the percentage of the time spent on open arm and the number of entries into open arm in the plus maze test. Furthermore, the treatment with haloperidol and/or V. officinalis decreased the locomotor activity in the open field test. We did not find any difference among the groups when oxidative stress parameters were evaluated. Haloperidol treatment significantly decreased [(3)H]-dopamine uptake in striatal slices and V. officinalis was not able to prevent this effect. Taken together, our data suggest a mechanism involving the reduction of dopamine transport in the maintenance of chronic VCMs in rats. Furthermore, chronic treatment with V. officinalis seems not produce any oxidative damage to central nervous system (CNS), but it also seems to be devoid of action to prevent VCM, at least in the dose used in this study.
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Affiliation(s)
- Roselei Fachinetto
- Departamento de Química, Programa de Pós-Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria, RS, Brazil.
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Fachinetto R, Villarinho JG, Wagner C, Pereira RP, Puntel RL, Paixão MW, Braga AL, Calixto JB, Rocha JBT, Ferreira J. Diphenyl diselenide decreases the prevalence of vacuous chewing movements induced by fluphenazine in rats. Psychopharmacology (Berl) 2007; 194:423-32. [PMID: 17641876 DOI: 10.1007/s00213-007-0831-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2006] [Accepted: 05/15/2007] [Indexed: 12/23/2022]
Abstract
RATIONALE Chronic treatment with neuroleptics causes, as a side effect, tardive dyskinesia in humans; however, the mechanisms involved in its pathophysiology remain unclear. OBJECTIVES The purpose of this study was to examine the effects of diphenyl diselenide, an organoselenium compound with antioxidant properties, in an animal model of vacuous chewing movements (VCMs) induced by long-term treatment with fluphenazine. RESULTS Adult male rats were treated during 24 weeks with fluphenazine (25 mg/kg, intramuscularly [i.m.], once every 21 days) and diphenyl diselenide (1 mg/kg, subcutaneously, three times a week). VCMs and body weight gain were quantified every 3 weeks. The fluphenazine treatment produced VCMs in the majority of the treated rats (87% after 24 weeks). Concomitant treatment with diphenyl diselenide decreased the prevalence of VCMs to 50%. Additionally, we separated the rats that developed or did not develop VCMs. We did not find any statistical differences among the groups when oxidative stress parameters were evaluated. Chronic fluphenazine treatment significantly decreased [(3)H]-dopamine uptake. Concomitant treatment with diphenyl diselenide was not able to prevent this decrease in those rats that developed VCMs. CONCLUSIONS Our data suggest that the reduction in dopamine transport can be a possible mechanism related to the maintenance of VCMs in rats. Moreover, diphenyl diselenide seems to be a promising pharmacological agent in the reduction in the prevalence of VCMs in rats.
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Affiliation(s)
- Roselei Fachinetto
- Departamento de Química, Programa de Pós-Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
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Ilex paraguariensis has antioxidant potential and attenuates haloperidol-induced orofacial dyskinesia and memory dysfunction in rats. Neurotox Res 2007; 12:171-80. [DOI: 10.1007/bf03033914] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Rosa EF, Takahashi S, Aboulafia J, Nouailhetas VLA, Oliveira MGM. Oxidative stress induced by intense and exhaustive exercise impairs murine cognitive function. J Neurophysiol 2007; 98:1820-6. [PMID: 17625057 DOI: 10.1152/jn.01158.2006] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
It has been shown that exercise is helpful against brain disorders. However, this may not be true for intense exercise (IE). Because it is easy to misadjust exercise intensity with physical condition, it is essential to know the effects of IE on cognitive process because it may have important consequences on people skills and work skills. We investigated the effects of IE on male C57Bl/6 mice, 3-mo-old, undergoing 10 days of intense and exhaustive running program on cognition and its possible relationship with brain oxidative stress. Cognition was evaluated by three different cognitive tests: passive avoidance task, contextual fear conditioning, and tone fear conditioning, performed 24 h after the last exercise session. Brain oxidative stress was evaluated by lipid peroxidation and protein oxidation. There was a remarkable memory reduction of exercised animals in comparison with the control group, associated with increase in the brain oxidative stress, with no alterations in shock sensitivity, locomotion and anxiety parameters. Concurrent vitamin C and E supplementation fully prevented the memory decrement induced by IE and partially recovered both the increased the brain lipid peroxidation and the protein oxidation. In conclusion, IE-induces a high index of brain oxidative stress and impairs memory in murine model that was prevented by vitamin C and E supplementation.
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Affiliation(s)
- Eloi F Rosa
- Department of Biophysics, Universidade Federal de São Paulo/Escola Paulista de Medicina, Rua Napoleão de Barros, 925, 04024002 São Paulo, SP, Brazil
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Fighera MR, Royes LFF, Furian AF, Oliveira MS, Fiorenza NG, Frussa-Filho R, Petry JC, Coelho RC, Mello CF. GM1 ganglioside prevents seizures, Na+,K+-ATPase activity inhibition and oxidative stress induced by glutaric acid and pentylenetetrazole. Neurobiol Dis 2006; 22:611-23. [PMID: 16516483 DOI: 10.1016/j.nbd.2006.01.002] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2005] [Revised: 12/23/2005] [Accepted: 01/02/2006] [Indexed: 11/17/2022] Open
Abstract
Monosialoganglioside (GM1) is a glycosphingolipid that protects against some neurological conditions, such as seizures and ischemia. Glutaric acidemia type I (GA-I) is an inherited disease characterized by striatal degeneration, seizures, and accumulation of glutaric acid (GA). In this study, we show that GA inhibits Na+,K+-ATPase activity and increases oxidative damage markers (total protein carbonylation and thiobarbituric acid-reactive substances-TBARS) production in striatal homogenates from rats in vitro and ex vivo. It is also shown that GM1 (50 mg/kg, i.p., twice) protects against GA-induced (4 micromol/striatum) seizures, protein carbonylation, TBARS increase, and inhibition of Na+,K+-ATPase activity ex vivo. Convulsive episodes induced by GA strongly correlated with Na+,K+-ATPase activity inhibition in the injected striatum but not with oxidative stress marker measures. Muscimol (46 pmol/striatum), but not MK-801 (3 nmol/striatum) and DNQX (8 nmol/striatum) prevented GA-induced convulsions, increase of TBARS and protein carbonylation and inhibition of Na+,K+-ATPase activity. The protection of GM1 and muscimol against GA-induced seizures strongly correlated with Na+,K+-ATPase activity maintenance ex vivo. In addition, GM1 (50-200 microM) protected against Na+,K+-ATPase inhibition induced by GA (6 mM) but not against oxidative damage in vitro. GM1 also decreased pentylenetetrazole (PTZ)-induced (1.8 micromol/striatum) seizures, Na+,K+-ATPase inhibition, and increase of TBARS and protein carbonyl in the striatum. These data suggest that Na+,K+-ATPase and GABA(A) receptor-mediated mechanisms may play important roles in GA-induced seizures and in their prevention by GM1.
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Affiliation(s)
- Michele Rechia Fighera
- Laboratório de Psicofarmacologia e Neurotoxicologia, Departamento de Fisiologia e Farmacologia, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
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Castro JPMV, Frussa-Filho R, Fukushiro DF, Silva RH, Medrano WA, Ribeiro RDA, Abílio VC. Effects of baclofen on reserpine-induced vacuous chewing movements in mice. Brain Res Bull 2006; 68:436-41. [PMID: 16459199 DOI: 10.1016/j.brainresbull.2005.09.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2004] [Revised: 05/31/2005] [Accepted: 09/30/2005] [Indexed: 10/25/2022]
Abstract
We have described that GABA mimetic drugs present the ability to inhibit the expression of reserpine-induced oral movements. In this respect, oral movements is associated with important neuropathologies. This study investigates the effects of an acute or a repeated treatment of different doses of the GABA(B) agonist baclofen, as well as withdrawal from these treatments, on the development and/or expression of reserpine-induced vacuous chewing movements (VCM). Male mice received two injections of vehicle or of 1mg/kg reserpine separated by 48 h. In the first experiment, 24h later, animals were acutely treated with vehicle or baclofen (1, 2 or 4 mg/kg). In the second experiment, animals were treated with vehicle or baclofen (1 or 4 mg/kg) for four consecutive days receiving a concomitant injection of 1mg/kg reserpine (or vehicle) on Days 2 and 4. Twenty-four hours later, animals received vehicle or baclofen. Thirty minutes after the last injection, they were observed for quantification of VCM and open-field general activity. The acute administration of all the doses of baclofen abolished the manifestation of reserpine-induced VCM. Repeated treatment with 1mg/kg baclofen induced tolerance to the ability of an acute injection of this dose to reduce VCM. Treatment with baclofen (4 mg/kg) did not modify spontaneous VCM. Acute administration of the highest dose induced a decrease in general motor activity and a potentiation of the reserpine-induced decrease in general activity. These results reinforce the involvement of GABAergic hypofunction in the expression of oral movements and suggest that a repeated treatment with baclofen induces compensatory changes in GABAergic transmission that can attenuate its acute property to decrease VCM.
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Affiliation(s)
- Juliana P M V Castro
- Department of Pharmacology, Escola Paulista de Medicina/UNIFESP, São Paulo, Brazil
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Ricardo VP, Frussa-Filho R, Silva RH, Lopez GB, Patti CL, Zanier-Gomes PH, Araujo NP, Lima AJO, Carvalho RC, Kameda SR, Abílio VC. Effects of social isolation on aging-induced orofacial movements in rats. Physiol Behav 2005; 86:203-8. [PMID: 16095638 DOI: 10.1016/j.physbeh.2005.07.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2004] [Revised: 05/28/2005] [Accepted: 07/12/2005] [Indexed: 10/25/2022]
Abstract
World population is becoming older, and aging is a common risk factor for a number of pathologies. In this respect, it is important to study possible factors that could modify alterations implicated in the process of aging. The aim of the present study is to verify the effects of social isolation on the expression of orofacial movements in adult and old rats. Adult and old rats were housed isolated for 5 days or kept in their home cages in groups of six. Before and after this period, orofacial movements and open-field general activity were evaluated. Aging-induced orofacial movements were abolished by isolation. On the other hand, isolated adult rats presented an increase in orofacial movements. General activity was decreased by aging but was not modified by isolation. Our results indicate that social isolation produces different effects in adult and old rats, and these effects are specific for orofacial movements and not related to a decrease in general motor activity.
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Affiliation(s)
- V P Ricardo
- Departamento de Farmacologia, Universidade Federal de São Paulo, Edifício José Leal Prado, Brazil
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