Efeito comportamental em modelos experimentais de depressão por microinjeções do peptídeo liberador de gastrina via intra nucleus accumbens

Autores

DOI:

https://doi.org/10.25118/2763-9037.2021.v11.221

Palavras-chave:

transtorno depressivo maior, depressão, GRP

Resumo

Introdução: O Transtorno Depressivo Maior é uma condição médica comum na população, que pode atingir não somente a capacidade mental, mas também a capacidade física, causando inclusive incapacidade laboral. A sua causa ainda permanece desconhecida, apesar de algumas teorias terem ganhado espaço, como as hipóteses da neurogênese e da neuroplasticidade, que surgiram num contexto onde a clássica hipótese das monoaminas já não explica todos os casos. Nesse contexto, uma forte associação entre a hiperatividade do eixo hipotálamo-pituitária-adrenal, bem como dos hormônios do trato gastrointestinal, foram destacados em estudos, levantando a hipótese de a depressão ter fatores metabólicos associados, levando inclusive a caracterização de doença metabólica segundo alguns autores. Objetivos: Desta forma, o presente estudo busca analisar o feito comportamental do hormônio do trato gastrointestinal GRP tendo em vista as evidências presentes sobre a possível relação deste com a fisiopatologia da depressão. Método: Foram selecionados 20 camundongos Swiss para realização do procedimento da derrota social, análise com teste do nado forçado e intervenção com Fluoxetina no controle e GRP no experimental. Resultados: O estresse de derrota social aumentou o tempo de imobilidade no teste do nado forçado em 13 segundos nos camundongos submissos, a injeção de GRP reduziu o tempo de imobilidade com uma diferença de 78 segundos para o grupo controle tratado com Fluoxetina. Conclusão: Assim, o GRP, comparado aos outros hormônios estudados na depressão apresentou efeito positivo no quadro depressivo e possível terapia para seu tratamento.

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2021-12-03

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1.
Almeida R de, Henna Neto J, Silva EEP da. Efeito comportamental em modelos experimentais de depressão por microinjeções do peptídeo liberador de gastrina via intra nucleus accumbens. Debates em Psiquiatria [Internet]. 3º de dezembro de 2021 [citado 22º de dezembro de 2024];11:1-26. Disponível em: https://revistardp.org.br/revista/article/view/221

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