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Oliveira RN, Carvalhinho-Lopes PS, Carvalho CPF, Hirata RYS, Vaz SH, Sebastião AM, Armada-Moreira A, Rosário BA, Lemes JA, Soares-Silva B, de Andrade JS, Santos JR, Ribeiro AM, Viana MB. Neuroprotective effects of platinum nanoparticle-based microreactors in bicuculline-induced seizures. Behav Brain Res 2024; 465:114956. [PMID: 38479475 DOI: 10.1016/j.bbr.2024.114956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/05/2024] [Accepted: 03/11/2024] [Indexed: 04/14/2024]
Abstract
Epilepsy designates a group of chronic brain disorders, characterized by the recurrence of hypersynchronous, repetitive activity, of neuronal clusters. Epileptic seizures are the hallmark of epilepsy. The primary goal of epilepsy treatment is to eliminate seizures with minimal side effects. Nevertheless, approximately 30% of patients do not respond to the available drugs. An imbalance between excitatory/inhibitory neurotransmission, that leads to excitotoxicity, seizures, and cell death, has been proposed as an important mechanism regarding epileptogenesis. Recently, it has been shown that microreactors composed of platinum nanoparticles (Pt-NP) and glutamate dehydrogenase possess in vitro and in vivo activity against excitotoxicity. This study investigates the in vivo effects of these microreactors in an animal model of epilepsy induced by the administration of the GABAergic antagonist bicuculline. Male Wistar rats were administered intracerebroventricularly (i.c.v.) with the microreactors or saline and, five days later, injected with bicuculline or saline. Seizure severity was evaluated in an open field. Thirty min after behavioral measurements, animals were euthanized, and their brains processed for neurodegeneration evaluation and for neurogenesis. Treatment with the microreactors significantly increased the time taken for the onset of seizures and for the first tonic-clonic seizure, when compared to the bicuculline group that did not receive the microreactor. The administration of the microreactors also increased the time spent in total exploration and grooming. Treatment with the microreactors decreased bicuculline-induced neurodegeneration and increased neurogenesis in the dorsal and ventral hippocampus. These observations suggest that treatment with Pt-NP-based microreactors attenuates the behavioral and neurobiological consequences of epileptiform seizure activity.
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Affiliation(s)
- Roberto N Oliveira
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - Patrícia S Carvalhinho-Lopes
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - Carolina P F Carvalho
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - Rafael Y S Hirata
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - Sandra H Vaz
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, Lisboa 1649-028, Portugal; Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Av. Professor Egas Moniz, Lisboa 1649-028, Portugal
| | - Ana Maria Sebastião
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, Lisboa 1649-028, Portugal; Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Av. Professor Egas Moniz, Lisboa 1649-028, Portugal
| | - Adam Armada-Moreira
- Neuronal Dynamics Laboratory, Scuola Internazionale Superiore di Studi Avanzati, via Bonomea, Trieste 265 - 34136, Italy
| | - Bárbara A Rosário
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - Jéssica A Lemes
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - Beatriz Soares-Silva
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - José S de Andrade
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - José Ronaldo Santos
- Departamento de Biociências, Universidade Federal de Sergipe, Rua Cláudio Batista, s/n, Cidade Nova Aracaju, Aracaju, Sergipe 49060-108, Brazil
| | - Alessandra M Ribeiro
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil
| | - Milena B Viana
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, Santos, São Paulo 11015-020, Brazil.
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Hirata RYS, Oliveira RN, Silva MSCF, Armada-Moreira A, Vaz SH, Ribeiro FF, Sebastião AM, Lemes JA, de Andrade JS, Rosário BA, Céspedes IC, Viana MB. Platinum nanoparticle-based microreactors protect against the behavioral and neurobiological consequences of chronic stress exposure. Brain Res Bull 2022; 190:1-11. [PMID: 36089164 DOI: 10.1016/j.brainresbull.2022.09.004] [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: 05/16/2022] [Revised: 08/22/2022] [Accepted: 09/06/2022] [Indexed: 11/15/2022]
Abstract
Excitotoxicity is described as the exacerbated activation of glutamate AMPA and NMDA receptors that leads to neuronal damage, and ultimately to cell death. Astrocytes are responsible for the clearance of 80-90% of synaptically released glutamate, preventing excitotoxicity. Chronic stress renders neurons vulnerable to excitotoxicity and has been associated to neuropsychiatric disorders, i.e., anxiety. Microreactors containing platinum nanoparticles (Pt-NP) and glutamate dehydrogenase have shown in vitro activity against excitotoxicity. The purpose of the present study was to investigate the in vivo effects of these microreactors on the behavioral and neurobiological effects of chronic stress exposure. Rats were either unstressed or exposed for 2 weeks to an unpredictable chronic mild stress paradigm (UCMS), administered intra-ventral hippocampus with the microreactors (with or without the blockage of astrocyte functioning), and seven days later tested in the elevated T-maze (ETM; Experiment 1). The ETM allows the measurement of two defensive responses, avoidance and escape, in terms of psychopathology respectively related to generalized anxiety and panic disorder. Locomotor activity in an open field was also measured. Since previous evidence shows that stress inhibits adult neurogenesis, we evaluated the effects of the different treatments on the number of cells expressing the marker of migrating neuroblasts doublecortin (DCX) in the dorsal and ventral hippocampus (Experiment 2). Results showed that UCMS induces anxiogenic effects, increases locomotion, and decreases the number of DCX cells in the dorsal and ventral hippocampus, effects that were counteracted by microreactor administration. This is the first study to demonstrate the in vivo efficacy of Pt-NP against the behavioral and neurobiological effects of chronic stress exposure.
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Affiliation(s)
- Rafael Y S Hirata
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, 11015-020 Santos, São Paulo, Brazil
| | - Roberto N Oliveira
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, 11015-020 Santos, São Paulo, Brazil
| | - Mariana S C F Silva
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, 11015-020 Santos, São Paulo, Brazil
| | - Adam Armada-Moreira
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Bredgatan 33, 602 21 Norrköping, Sweden
| | - Sandra H Vaz
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, 1649-028 Lisboa, Portugal; Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Av. Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Filipa F Ribeiro
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, 1649-028 Lisboa, Portugal; Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Av. Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Ana Maria Sebastião
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, 1649-028 Lisboa, Portugal; Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Av. Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Jéssica A Lemes
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, 11015-020 Santos, São Paulo, Brazil
| | - José S de Andrade
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, 11015-020 Santos, São Paulo, Brazil
| | - Bárbara A Rosário
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, 11015-020 Santos, São Paulo, Brazil
| | - Isabel C Céspedes
- Departamento de Morfologia e Genética, Universidade Federal de São Paulo (UNIFESP), Rua Botucatu, 740, 04023-900 São Paulo, SP, Brazil
| | - Milena B Viana
- Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Rua Silva Jardim, 136, 11015-020 Santos, São Paulo, Brazil.
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Lopes DA, Souza TM, de Andrade JS, Silva MF, Antunes HK, Sueur-Maluf LL, Céspedes IC, Viana MB. Environmental enrichment decreases avoidance responses in the elevated T-maze and delta FosB immunoreactivity in anxiety-related brain regions. Behav Brain Res 2018; 344:65-72. [DOI: 10.1016/j.bbr.2018.02.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/06/2018] [Accepted: 02/09/2018] [Indexed: 01/16/2023]
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de Andrade JS, Céspedes IC, Abrão RO, da Silva JM, Ceneviva R, Ribeiro DA, Bittencourt JC, Viana MB. Effects of acute restraint and unpredictable chronic mild stress on brain corticotrophin releasing factor mRNA in the elevated T-maze. Behav Brain Res 2018; 337:139-150. [DOI: 10.1016/j.bbr.2017.09.029] [Citation(s) in RCA: 8] [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: 06/21/2017] [Revised: 09/15/2017] [Accepted: 09/17/2017] [Indexed: 11/29/2022]
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Lopes DA, Lemes JA, Melo-Thomas L, Schor H, de Andrade JS, Machado CM, Horta-Júnior JA, Céspedes IC, Viana MB. Unpredictable chronic mild stress exerts anxiogenic-like effects and activates neurons in the dorsal and caudal region and in the lateral wings of the dorsal raphe nucleus. Behav Brain Res 2016; 297:180-6. [DOI: 10.1016/j.bbr.2015.10.006] [Citation(s) in RCA: 8] [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: 09/08/2015] [Revised: 10/01/2015] [Accepted: 10/03/2015] [Indexed: 10/22/2022]
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de Andrade JS, Viana MB, Abrão RO, Bittencourt JC, Céspedes IC. CRF family peptides are differently altered by acute restraint stress and chronic unpredictable stress. Behav Brain Res 2014; 271:302-8. [PMID: 24933190 DOI: 10.1016/j.bbr.2014.06.014] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Revised: 06/06/2014] [Accepted: 06/08/2014] [Indexed: 10/25/2022]
Abstract
Corticotropin-releasing factor (CRF) acts to promote stress-like physiological and behavioral responses and is mainly expressed in the paraventricular hypothalamic nucleus (PVN). Urocortin 1 (Ucn1) is also a ligand to CRF type 1 and 2 receptors that has been associated with the stress response. Ucn1 neurons are primarily found in the Edinger-Westphal (EW) nucleus. It has been previously proposed that CRF and Ucn1 differently modulate stress responses to distinct types of stressors. The present study used male Wistar rats to compare the effects of acute restraint stress and unpredictable chronic stress (UCS) through Fos-immunoreactivity (Fos-ir) on CRF-containing neurons of PVN and Ucn1-containing EW centrally projecting neurons. Results showed that PVN neurons responded to both acute restraint and UCS. Also for the PVN, unspecific variables, dependent on the time animals remained in the laboratory, do not seem to alter Fos-ir, since no significant differences between acute and chronic control groups were found. On the other hand, EW neurons were only activated in response to acute restraint stress. Also, for this nucleus a significant difference was found between acute and chronic control groups, suggesting that unspecific variables, dependent on the time animals remain in the laboratory, interfere with the nucleus activation. These results suggest that CRF/Ucn1 neuronal circuits encompass two interconnected systems, which are coordinated to respond to acute stressors, but are differentially activated during chronic unpredictable stress.
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Affiliation(s)
- José S de Andrade
- Department of Biosciences, Federal University of São Paulo, Av. Ana Costa 95, UNIFESP, 11060-001 Santos, SP, Brazil
| | - Milena B Viana
- Department of Biosciences, Federal University of São Paulo, Av. Ana Costa 95, UNIFESP, 11060-001 Santos, SP, Brazil
| | - Renata O Abrão
- Department of Biosciences, Federal University of São Paulo, Av. Ana Costa 95, UNIFESP, 11060-001 Santos, SP, Brazil
| | - Jackson C Bittencourt
- Laboratory of Chemical Neuroanatomy, Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, USP, 05508-000 São Paulo, SP, Brazil; Center of Neuroscience and Behavior, Institute of Psychology, University of São Paulo, Av. Prof. Mello Moraes, 1721, Bloco C, 05508-030, São Paulo, SP, Brazil
| | - Isabel C Céspedes
- Department of Biosciences, Federal University of São Paulo, Av. Ana Costa 95, UNIFESP, 11060-001 Santos, SP, Brazil.
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