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Trindade-Filho EM, Pai JD, Castro DND, Silva ATMD, Costa AF, Vieira JSS, Santos SDBD, Félix VB, Leão SABF, Zambrano LI, Saldanha-Filho AJM, Carvalho EGA, Cavalcante JBN, Quintella GB, Lino ATS, Costa MV, Lima JA, Tavares MMA, de Melo MR, Mousinho KC, Biase CLCLD, Leite ML, Costa PJMS, Becker EL, Moura IMFB, Silva JCD. Dopamine depletion in wistar rats with epilepsy. BRAZ J BIOL 2022; 84:e248411. [PMID: 35544785 DOI: 10.1590/1519-6984.248411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 02/20/2022] [Indexed: 11/22/2022] Open
Abstract
The dopamine content in cerebral structures has been related to neuronal excitability and several approaches have been used to study this phenomenon during seizure vulnerability period. In the present work, we describe the effects of dopamine depletion after the administration of 6-hidroxidopamine (6-OHDA) into the substantia nigra pars compacta of male rats submitted to the pilocarpine model of epilepsy. Susceptibility to pilocarpine-induced status epilepticus (SE), as well as spontaneous and recurrent seizures (SRSs) frequency during the chronic period of the model were determined. Since the hippocampus is one of main structures in the development of this experimental model of epilepsy, the dopamine levels in this region were also determined after drug administration. In the first experiment, 62% (15/24) of 6-OHDA pre-treated rats and 45% (11/24) of those receiving ascorbic acid as control solution progressed to motor limbic seizures evolving to SE, after the administration of pilocarpine. Severeness of seizures during the model´s the acute period, was significantly higher in epileptic experimental rats (56.52%), than in controls (4.16%). In the second experiment, the frequency of seizures in the model's chronic phase did not significantly change between groups. Our data show that dopamine may play an important role on seizure severity in the pilo's model acute period, which seems to be due to dopamine inhibitory action on motor expression of seizure.
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Affiliation(s)
- E M Trindade-Filho
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - J Dal Pai
- Instituto do Cérebro do Rio Grande do Sul - InsCer, Porto Alegre, RS, Brasil
| | - D N de Castro
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - A T M da Silva
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - A F Costa
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - J S S Vieira
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | | | - V B Félix
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Hospital Universitário de Alagoas Professor Alberto Antunes - HUPAA, Maceió, AL, Brasil
| | - S A B F Leão
- Santa Casa de Misericórdia de Maceió, AL, Brasil.,Universidade Federal de Alagoas - UFAL, Campus de Arapiraca, AL, Brasil
| | - L I Zambrano
- Universidad Nacional Autónoma de Honduras - UNAH, Facultad de Ciencias Medicas, Tegucigalpa, Honduras
| | - A J M Saldanha-Filho
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Centro Universitário Tiradentes - UNIT-AL, Maceió, AL, Brasil
| | - E G A Carvalho
- Centro Universitário Tiradentes - UNIT-PE, Jaboatão dos Guararapes, Pernambuco, PE, Brasil
| | - J B N Cavalcante
- Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - G B Quintella
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - A T S Lino
- Universidade Federal de Alagoas - UFAL, Campus de Rio Largo, Alagoas, Brasil
| | - M V Costa
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - J A Lima
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - M M A Tavares
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - M R de Melo
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - K C Mousinho
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - C L C L De Biase
- Hospital Universitário de Alagoas Professor Alberto Antunes - HUPAA, Maceió, AL, Brasil
| | - M L Leite
- Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - P J M S Costa
- Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
| | - E L Becker
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - I M F B Moura
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil
| | - J C da Silva
- Centro Universitário - CESMAC, Campus I, Maceió, AL, Brasil.,Universidade Estadual de Ciências da Saúde de Alagoas - UNCISAL, Maceió, AL, Brasil
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Svob Strac D, Pivac N, Smolders IJ, Fogel WA, De Deurwaerdere P, Di Giovanni G. Monoaminergic Mechanisms in Epilepsy May Offer Innovative Therapeutic Opportunity for Monoaminergic Multi-Target Drugs. Front Neurosci 2016; 10:492. [PMID: 27891070 PMCID: PMC5102907 DOI: 10.3389/fnins.2016.00492] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 10/13/2016] [Indexed: 12/22/2022] Open
Abstract
A large body of experimental and clinical evidence has strongly suggested that monoamines play an important role in regulating epileptogenesis, seizure susceptibility, convulsions, and comorbid psychiatric disorders commonly seen in people with epilepsy (PWE). However, neither the relative significance of individual monoamines nor their interaction has yet been fully clarified due to the complexity of these neurotransmitter systems. In addition, epilepsy is diverse, with many different seizure types and epilepsy syndromes, and the role played by monoamines may vary from one condition to another. In this review, we will focus on the role of serotonin, dopamine, noradrenaline, histamine, and melatonin in epilepsy. Recent experimental, clinical, and genetic evidence will be reviewed in consideration of the mutual relationship of monoamines with the other putative neurotransmitters. The complexity of epileptic pathogenesis may explain why the currently available drugs, developed according to the classic drug discovery paradigm of "one-molecule-one-target," have turned out to be effective only in a percentage of PWE. Although, no antiepileptic drugs currently target specifically monoaminergic systems, multi-target directed ligands acting on different monoaminergic proteins, present on both neurons and glia cells, may represent a new approach in the management of seizures, and their generation as well as comorbid neuropsychiatric disorders.
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Affiliation(s)
| | - Nela Pivac
- Division of Molecular Medicine, Rudjer Boskovic InstituteZagreb, Croatia
| | - Ilse J. Smolders
- Department of Pharmaceutical Chemistry and Drug Analysis, Vrije Universiteit BrusselBrussels, Belgium
| | - Wieslawa A. Fogel
- Department of Hormone Biochemistry, Medical University of LodzLodz, Poland
| | | | - Giuseppe Di Giovanni
- Laboratory of Neurophysiology, Department of Physiology and Biochemistry, University of MaltaMsida, Malta
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