Resveratrol induces mitochondrial dysfunction and decreases chronological life span of Saccharomyces cerevisiae in a glucose-dependent manner
| Autor: | Juan Carlos González-Hernández, Luis Alberto Madrigal-Perez, Gerardo M. Nava, Ivanna Karina Olivares-Marin, Minerva Ramos-Gomez, Melina Canizal-Garcia |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Physiology Longevity Saccharomyces cerevisiae Oxidative phosphorylation Resveratrol Antioxidants Oxidative Phosphorylation 03 medical and health sciences chemistry.chemical_compound Oxygen Consumption Stilbenes Viability assay Hydrogen peroxide Inner mitochondrial membrane Membrane potential 030102 biochemistry & molecular biology biology Chemistry Hydrogen Peroxide Cell Biology biology.organism_classification Phenotype Yeast Mitochondria Cell biology Glucose 030104 developmental biology Biochemistry |
| Zdroj: | Journal of Bioenergetics and Biomembranes. 49:241-251 |
| ISSN: | 1573-6881 0145-479X |
| Popis: | A broad range of health benefits have been attributed to resveratrol (RSV) supplementation in mammalian systems, including the increases in longevity. Nonetheless, despite the growing number of studies performed with RSV, the molecular mechanism by which it acts still remains unknown. Recently, it has been proposed that inhibition of the oxidative phosphorylation activity is the principal mechanism of RSV action. This mechanism suggests that RSV might induce mitochondrial dysfunction resulting in oxidative damage to cells with a concomitant decrease of cell viability and cellular life span. To prove this hypothesis, the chronological life span (CLS) of Saccharomyces cerevisiae was studied as it is accepted as an important model of oxidative damage and aging. In addition, oxygen consumption, mitochondrial membrane potential, and hydrogen peroxide (H2O2) release were measured in order to determine the extent of mitochondrial dysfunction. The results demonstrated that the supplementation of S. cerevisiae cultures with 100 μM RSV decreased CLS in a glucose-dependent manner. At high-level glucose, RSV supplementation increased oxygen consumption during the exponential phase yeast cultures, but inhibited it in chronologically aged yeast cultures. However, at low-level glucose, oxygen consumption was inhibited in yeast cultures in the exponential phase as well as in chronologically aged cultures. Furthermore, RSV supplementation promoted the polarization of the mitochondrial membrane in both cultures. Finally, RSV decreased the release of H2O2 with high-level glucose and increased it at low-level glucose. Altogether, this data supports the hypothesis that RSV supplementation decreases CLS as a result of mitochondrial dysfunction and this phenotype occurs in a glucose-dependent manner. |
| Databáze: | OpenAIRE |
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