Applied Physiology, Nutrition, and Metabolism 2011-10-01

A possible subcellular mechanism underlying the "French paradox": the opening of mitochondrial K(ATP) channels.

Ernesto A Aiello, Horacio E Cingolani

Index: Appl. Physiol. Nutr. Metab. 36(5) , 768-72, (2011)

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Abstract

A reduction in the risk of coronary heart disease has been associated to moderate red wine consumption. We tested whether a nonalcoholic red wine extract would open mitochondrial K(ATP) channels in guinea pig myocytes. The opening of mitochondrial K(ATP) channels was assessed by endogenous flavoprotein fluorescence. Red wine extract (100 μg·mL(-1)) increased flavoprotein oxidation (10.9% ± 1.2%, n = 20). This effect was prevented by the mitochondrial K(ATP) channel blocker, 5-hydroxydecanoate (500 µmol·L(-1); 0.3% ± 1.1%, n = 13), confirming the hypothesis that red wine extract opens mitochondrial K(ATP) channels.