Avaliação comportamental e molecular em um modelo de epilepsia do lobo temporal

• Ano de defesa: 2017
• Autor(a) principal: Pimentel, Luciana Cristina
• Orientador(a): Cysneiros, Roberta Monterazzo
• Banca de defesa: Carreiro, Luiz Renato Rodrigues , Silva, Regina Cláudia Barbosa da , Ribeiro, Miriam Oliveira , Scorza, Fulvio Alexandre
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Presbiteriana Mackenzie
• Programa de Pós-Graduação: Distúrbios do Desenvolvimento
• Departamento: Centro de Ciências Biológicas e da Saúde (CCBS)
• País: Brasil
• Palavras-chave em Português: pilocarpina; TDAH; epilepsia; receptor dopaminérgico
• Área do conhecimento CNPq: CNPQ::CIENCIAS DA SAUDE::FARMACIA
• Link de acesso: http://dspace.mackenzie.br/handle/10899/24549

The pilocarpine model of Temporal Lobe Epilepsy (TLE) reliably reproduces the characteristics found in TLE in humans and provokes Attention-deficit/hyperactivity disorder (ADHD)-like behaviors in rodents. However, it is not known if these behavioral changes are associated with variations on genetic expression. The present study aimed to investigate behavior patterns and molecular indicators of ADHD in the pilocarpine model of TLE. Male Wistar rats at 25 day of age were submitted to animal model of TLE by pilocarpine injection (350 mg/kg, ip) and a control group received saline 0.9%. The behavioural tests (open field and operant conditioning box) started from 28 days postnatal. Through Real-Time Polimerase Chain Reaction (RT-PCR), were evaluated the expression of somatostatin, mGluR7 and dopaminergic receptors subtype D1 and subtype D5, in the pre-frontal cortex and hippocampus. Behavioral parameters were analysed using Mixed ANOVA, followed by Bonferroni for post-hoc testing. For data analyses of gene expression, t-Student test was used. The data were expressed as mean ± standard error and p-values of 0.05 or less were considered significant. The analyses were effectuated using commercial program (Prism 5.03 for windows). Results in open field for total locomotion revealed a significant difference between groups (F[1,144]=9,32 p=0,0076) and between sessions (F[9,144]= 5,74 p<0,0001), nor effect of interaction between factors (F[9,144]=9,32 NS); and for central locomotion, in percentage, was a significantly diferente between groups (F[1,144]=5,54 p=0,031), effect of interaction between the factors (F[9,144]=3,41 p=0,0008), with no difference between sessions (F[9,144]=0,75 NS). In Skinner box, no significant differences were found between the groups in experimental conditions of this study. For RT-PCR there were observed no significant differences in the expression relative of mRNA in the analyzed genes. We concluded that animals with TLE exhibited elevated locomotor activity and reduced level of anxiety-related behavior. There was observed no deficit of attention and impulsive-like behavior. There were found no variations for somatostatin gene expression, mGluR7 and dopaminergic receptors D1 and D5, in prefrontal cortex and in hippocampus. Behavioral alterations observed in the model of TLE probably are not related to gene alterations of somatostatin and these receptors.