Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 1 de 1
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Eur J Pharmacol ; 760: 7-19, 2015 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-25895640

RESUMO

The mode of protection against cardiac reperfusion injury by mild hypothermia and TRO40303 was investigated in various experimental models and compared to MitoQ in vitro. In isolated cardiomyocytes subjected to hypoxia/reoxygenation, TRO40303, MitoQ and mild hypothermia delayed mPTP opening, inhibited generation of mitochondrial superoxide anions at reoxygenation and improved cell survival. Mild hypothermia, but not MitoQ and TRO40303, provided protection in a metabolic starvation model in H9c2 cells and preserved respiratory function in isolated rat heart mitochondria submitted to anoxia/reoxygenation. In the Langendorff-perfused rat heart, only mild hypothermia provided protection of hemodynamic function and reduced infarct size following ischemia/reperfusion. In biopsies from the left ventricle of pigs subjected to in vivo occlusion/reperfusion, TRO40303 specifically preserved respiratory functions in the peri-infarct zone whereas mild hypothermia preserved both the ischemic core area and the peri-infarct zones. Additionally in this pig model, only hypothermia reduced infarct size. We conclude that mild hypothermia provided protection in all models by reducing the detrimental effects of ischemia, and when initiated before occlusion, reduced subsequent reperfusion damage leading to a smaller infarct. By contrast, although TRO40303 provided similar protection to MitoQ in vitro and offered specific protection against some aspects of reperfusion injury in vivo, this was insufficient to reduce infarct size.


Assuntos
Cardiotônicos/uso terapêutico , Hipotermia Induzida/métodos , Traumatismo por Reperfusão Miocárdica/metabolismo , Traumatismo por Reperfusão Miocárdica/prevenção & controle , Oximas/uso terapêutico , Secoesteroides/uso terapêutico , Animais , Células Cultivadas , Feminino , Masculino , Traumatismo por Reperfusão Miocárdica/terapia , Ratos , Ratos Sprague-Dawley , Espécies Reativas de Oxigênio/metabolismo , Suínos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...