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Vincentiis S, Alcantara JA, Rzezak P, Kerr DS, Gattaz WF, van der Linden H, Dos Santos B, Arruda F, Chaim-Avancini T, Serpa MH, Fernandes F, Moreno RA, Busatto GF, Alessi R, Demarque R, Valente KD. Genetic polymorphisms of the serotonin transporter are not related with depression in temporal lobe epilepsy caused by hippocampal sclerosis. Epilepsy Behav 2021; 117:107854. [PMID: 33639436 DOI: 10.1016/j.yebeh.2021.107854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/05/2021] [Accepted: 02/05/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Mood disorders are the most frequent psychiatric disorders in patients with temporal lobe epilepsy caused by hippocampal sclerosis (TLE-HS). The pathophysiological mechanisms in common between TLE and mood disorders include abnormalities in the serotonergic pathway. We aimed to evaluate the association between serotonin transporter genetic polymorphisms - 5-HTTLPR and 5-HTTVNTR - and the presence of mood disorders in patients with TLE-HS. METHODS We evaluated 119 patients with TLE-HS, with and without psychiatric disorder; 146 patients diagnosed with major depressive disorder (MDD), and 113 healthy volunteers. Individuals were genotyped for the 5-HTTLPR and 5-HTTVNTR polymorphisms. RESULTS No difference was observed between the TLE-HS groups, healthy controls, and MDD without epilepsy. There was a correlation between the 12-allele of the 5-HTTVNTR and the family history of patients with epilepsy with TLE-HS (p = 0.013). CONCLUSIONS In this study conducted in two Brazilian centers, the serotonin transporter polymorphisms evaluated cannot be associated with depressive disorder in patients with TLE-HS. Still, they do have some influence over some clinical characteristics of epilepsy in TLE-HS. These data may not be reproduced in other populations with distinct ethnic characteristics.
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Affiliation(s)
- Silvia Vincentiis
- Laboratory of Clinical Neurophysiology, Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil.
| | - Juliana A Alcantara
- Laboratory of Clinical Neurophysiology, Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Patricia Rzezak
- Laboratory of Clinical Neurophysiology, Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Daniel S Kerr
- Laboratory of Neuroscience (LIM-27), Department of Psychiatry, Faculdade de Medicina da Universidade de Sao Paulo (FMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Wagner F Gattaz
- Laboratory of Neuroscience (LIM-27), Department of Psychiatry, Faculdade de Medicina da Universidade de Sao Paulo (FMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil.
| | - Helio van der Linden
- Goiania Neurological Institute, Praça Gilson Alves de Souza, 140, Setor Bueno, Goiania, GO 74210-250, Brazil
| | - Bernardo Dos Santos
- Laboratory of Clinical Neurophysiology, Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Francisco Arruda
- Goiania Neurological Institute, Praça Gilson Alves de Souza, 140, Setor Bueno, Goiania, GO 74210-250, Brazil
| | - Tiffany Chaim-Avancini
- Laboratory of Psychiatric Neuroimaging (LIM-21), Department of Psychiatry, Faculdade de Medicina da Universidade de São Paulo (FMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Mauricio H Serpa
- Laboratory of Psychiatric Neuroimaging (LIM-21), Department of Psychiatry, Faculdade de Medicina da Universidade de São Paulo (FMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Fernando Fernandes
- Mood Disorders Unit (GRUDA), Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Ricardo A Moreno
- Mood Disorders Unit (GRUDA), Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Geraldo F Busatto
- Laboratory of Psychiatric Neuroimaging (LIM-21), Department of Psychiatry, Faculdade de Medicina da Universidade de São Paulo (FMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Ruda Alessi
- Laboratory of Clinical Neurophysiology, Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Renata Demarque
- Laboratory of Clinical Neurophysiology, Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil
| | - Kette D Valente
- Laboratory of Clinical Neurophysiology, Institute and Department of Psychiatry, Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP), Rua Dr. Ovidio Pires de Campos, 785, Cerqueira Cesar, Sao Paulo, SP 05403-010, Brazil.
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Vieira ÉLM, da Silva MCM, Gonçalves AP, Martins GL, Teixeira AL, de Oliveira ACP, Reis HJ. Serotonin and dopamine receptors profile on peripheral immune cells from patients with temporal lobe epilepsy. J Neuroimmunol 2021; 354:577534. [PMID: 33713941 DOI: 10.1016/j.jneuroim.2021.577534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 02/27/2021] [Accepted: 02/27/2021] [Indexed: 01/11/2023]
Abstract
The role of inflammation and immune cells has been demonstrated in neurological diseases, including epilepsy. Leukocytes, as well as inflammatory mediators, contribute to abnormal processes that lead to a reduction in seizure threshold and synaptic reorganization. In this sense, identifying different phenotypes of circulating immune cells is essential to understanding the role of these cells in epilepsy. Immune cells can express a variety of surface markers, including neurotransmitter receptors, such as serotonin and dopamine. Alteration in these receptors expression patterns may affect the level of inflammatory mediators and the pathophysiology of epilepsy. Therefore, in the current study, we evaluated the expression of dopamine and serotonin receptors on white blood cells from patients with temporal lobe epilepsy with hippocampal sclerosis (TLE-HS). Blood samples from 17 patients with TLE-HS and 21 controls were collected. PBMC were isolated and stained ex vivo for flow cytometry. We evaluated the expression of serotonin (5-HT1A, 5-HT1B, 5-HT2, 5-HT2B, 5-HT2C, 5-HT3, 5-HT4), and dopamine receptors (D1, D2, D3, D4, and D5) on the cell surface of lymphocytes and innate immune cells (monocytes and granulocytes). Our results demonstrated that innate cells and lymphocytes from patients with TLE-HS showed high mean fluorescent intensity (MFI) for 5-HT1A, 5-HT1B, 5-HT2A, and 5-HT4 compared to controls. No difference was observed for 5-HT2B. For dopamine receptors, the expression of D1, D2, D4, and D5 receptors was higher on innate cells from patients with TLE-HS when compared to controls for the MFI. Regarding lymphocytes population, D2 expression was increased in patients with TLE-HS. In conclusion, there are alterations in the expression of serotonin and dopamine receptors on immune blood cells of patients with TLE-HS. Although the biological significance of these findings still needs to be further investigated, these changes may contribute to the understanding of TLE-HS pathophysiology.
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Affiliation(s)
| | - Maria Carolina Machado da Silva
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Ana Paula Gonçalves
- Programa de Neurociências, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Gabriela Lopes Martins
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Antônio Lúcio Teixeira
- Instituto de Ensino e Pesquisa, Santa Casa BH, Belo Horizonte 30260-070, Brazil; Neuropsychiatry Program and Immuno-Psychiatry Lab, Department of Psychiatry and Behavioral Sciences, UT Health Houston, 1941 East Road, Houston, TX 77054, USA
| | - Antônio Carlos Pinheiro de Oliveira
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; Programa de Neurociências, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil.
| | - Helton José Reis
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; Programa de Neurociências, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil.
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