Efeito da suplementação com ácido α-lipóico no estresse oxidativo nos tecidos cardíaco e hepático de camundongos treinados em endurance submetidos a um exercício exaustivo

Autores/as

DOI:

https://doi.org/10.33233/rbfex.v20i3.4205

Palabras clave:

exercício físico; estresse oxidativo; antioxidante

Resumen

Introdução: O exercício de alta intensidade promove um aumento na produção de espécies reativas, o que pode ser prejudicial para a saúde e função de diversos órgãos. Objetivo: Analisar o efeito da suplementação com ácido α-lipóico contra o estresse oxidativo no coração e no fígado de camundongos treinados em endurance submetidos a uma sessão de exercício exaustivo. Métodos: Trinta e dois camundongos machos foram submetidos a 6 semanas de treinamento em natação. Os animais foram divididos em dois grupos de acordo com a suplementação, ácido α-lipóico ou veículo, oferecida durante as duas últimas semanas. A última sessão do treinamento foi destinada ao exercício de exaustão. Foram analisadas a peroxidação lipídica, dano oxidativo às proteínas e marcador antioxidante no fígado e coração imediatamente (0h) e quatro horas (4h) após o exercício exaustivo nos dois grupos. Resultados: O coração dos animais suplementados apresentou menor dano proteico e maiores níveis de antioxidante nas 0h e 4h. No fígado, a peroxidação lipídica foi maior nos animais suplementados em 0h, mas não diferiu 4h após a exaustão. O fígado dos animais suplementados apresentou níveis mais altos de proteína carbonilada nas 0h e nas 4h. Conclusão: A suplementação com ácido α-lipóico é um antioxidante eficiente para o coração de camundongos treinados submetidos a exercício exaustivo, mas é desnecessário para evitar o estresse oxidativo hepático induzido pelo esforço exaustivo.

Biografía del autor/a

Letí­cia Santana Wolf, USP

Departamento de Ciências da Saúde, Faculdade de Medicina de Ribeirão Preto.

Alisson de Carvalho Goncalves, IF Goiano

Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Urutaí, Urutaí, GO, Brasil

Ruan Carlos Macedo Moraes, USP

Departamento de Fisiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, SP, Brasil

Ana Carolina Nunes Rodrigues, UFTM

Laboratório de Nutrição Experimental, Instituto de Ciências da Saúde, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brasil

Susana Merino, USP

Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil

Guilherme Vannucchi Portari, UFTM

Departamento de Nutrição, Instituto de Ciências da Saúde, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brasil

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Publicado

2021-11-04