El paraquat afecta la actividad de la ATPasa mitocondrial, las concentraciones de glutatión y la expresión de la gp-glicoproteína en el hígado del pez Colossoma macropomum
DOI:
https://doi.org/10.5216/rbn.v9i2.19488Keywords:
Ictiología neotropical, herbicidasAbstract
Avaliou-se o efeito de uma concentração subletal de 10 mg / L de o herbicida paraquat sobre a actividade ATPase mitocondrial (ATPasamit), a concentração de glutationa (GSH) e a expressão de P-glicoproteina (P-gp) de fígado de peixe Cachama, Colossoma macropomum , 54 juvenis foram expostos para os dias 7, 14 e 21. Após os ensaios, determinou-se a atividade de ATPase, a concentração de glutationa paraquat, e eletroforese de proteínas de membrana para visualizar fração P-gp. Os resultados demonstram que o paraquat e diminui a actividade da ATPasamit concentração de GSH em 14 dias de exposição PQ. Observou-se a expressão de uma proteína de 170 kDa aparentes massa molecular correspondente com a P-gp, que foi observada enriquecido 7 e 21 dias de exposição. No fígado, a concentração de herbicida foi mantido entre 0,34 e 1,59 ± 1,68 ± 0,32 mg / GPQ durante o tempo de exposição. Paraquat afectado a fosforilação potencial de membrana mitocondrial e oxidação, tal como demonstrado pela inibição da actividade da ATPasamit; décimo quarto dia de exposição para os peixes é crítica, uma vez que inibe a ATPasamit, diminui a concentração de glutationa e de expressão da P-gp glicoproteína.
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