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De Barros Oliveira R, Anselmi M, Marchette RCN, Roversi K, Fadanni GP, De Carvalho LM, Damasceno S, Heinrich IA, Leal RB, Cavalli J, Moreira-Júnior RE, Godard ALB, Izídio GS. Differential expression of alpha-synuclein in the hippocampus of SHR and SLA16 isogenic rat strains. Behav Brain Res 2024; 461:114835. [PMID: 38151185 DOI: 10.1016/j.bbr.2023.114835] [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: 07/31/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 12/29/2023]
Abstract
Two inbred strains, Lewis (LEW) and Spontaneously Hypertensive Rats (SHR), are well-known for their contrasting behavior related to anxiety/emotionality. Studies with these two strains led to the discovery of the Quantitative Trait Loci (QTL) on chromosome 4 (Anxrr16). To better understand the influences of this genomic region, the congenic rat strain SLA16 (SHR.LEW-Anxrr16) was developed. SLA16 rats present higher hyperactivity/impulsivity, deficits in learning and memory, and lower basal blood pressure than the SHR strain, even though genetic differences between them are only in chromosome 4. Thus, the present study proposed the alpha-synuclein and the dopaminergic system as candidates to explain the differential behavior of SHR and SLA16 strains. To accomplish this, beyond the behavioral analysis, we performed (I) the Snca gene expression and (II) quantification of the alpha-synuclein protein in the hippocampus (HPC), prefrontal cortex (PFC), and striatum (STR) of SHR and SLA16 strains; (III) sequencing of the 3'UTR of the Snca gene; and (IV) evaluation of miRNA binding in the 3'UTR site. A Single Nucleotide Polymorphism (SNP) was identified in the 3'UTR of the Snca gene, which exhibited upregulation in the HPC of SHR compared to SLA16 females. Alpha-synuclein protein was higher in the HPC of SHR males compared to SLA16 males. The results of this work suggested that differences in alpha-synuclein HPC content could be influenced by miRNA regulation and associated with behavioral differences between SHR and SLA16 animals.
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Affiliation(s)
- Rachel De Barros Oliveira
- Programa de Pós-Graduação em Biologia Celular e do Desenvolvimento, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Mayara Anselmi
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | | | - Katiane Roversi
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Guilherme Pasetto Fadanni
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Luana Martins De Carvalho
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Samara Damasceno
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Rodrigo Bainy Leal
- Programa de Pós-Graduação em Bioquímica, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Juliana Cavalli
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Curitibanos, Brazil
| | | | - Ana Lúcia Brunialti Godard
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Geison Souza Izídio
- Programa de Pós-Graduação em Biologia Celular e do Desenvolvimento, Universidade Federal de Santa Catarina, Florianópolis, Brazil; Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil.
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