Koziel 2013 Biochem J
| Koziel R, Pircher H, Kratochwil M, Lener B, Hermann M, Dencher NA, Jansen-Duerr P (2013) Mitochondrial respiratory chain complex I is inactivated by NADPH oxidase Nox4. Biochem J 452:231-239. |
Koziel R, Pircher H, Kratochwil M, Lener B, Hermann M, Dencher NA, Jansen-Duerr P (2013) Biochem J
Abstract: ROS (reactive oxygen species) generated by NADPH oxidases play an important role in cellular signal transduction regulating cell proliferation, survival and differentiation. Nox4 (NADPH oxidase 4) induces cellular senescence in human endothelial cells; however, intracellular targets for Nox4 remained elusive. In the present study, we show that Nox4 induces mitochondrial dysfunction in human endothelial cells. Nox4 depletion induced alterations in mitochondrial morphology, stabilized mitochondrial membrane potential and decreased production of H(2)O(2) in mitochondria. High-resolution respirometry in permeabilized cells combined with native PAGE demonstrated that Nox4 specifically inhibits the activity of mitochondrial electron transport chain complex I, and this was associated with a decreased concentration of complex I subunits. These data suggest a new pathway by which sustained Nox4 activity decreases mitochondrial function • Keywords: complex I, electron transport chain, mitochondrion, Nox4, oxidative stress, senescence
• O2k-Network Lab: AT Innsbruck Jansen-Duerr P
Labels:
Stress:Aging; Senescence"Aging; Senescence" is not in the list (Cell death, Cryopreservation, Ischemia-reperfusion, Permeability transition, Oxidative stress;RONS, Temperature, Hypoxia, Mitochondrial disease) of allowed values for the "Stress" property.
Tissue;cell: Endothelial; Epithelial; Mesothelial Cell"Endothelial; Epithelial; Mesothelial Cell" is not in the list (Heart, Skeletal muscle, Nervous system, Liver, Kidney, Lung;gill, Islet cell;pancreas;thymus, Endothelial;epithelial;mesothelial cell, Blood cells, Fat, ...) of allowed values for the "Tissue and cell" property. Preparation: Permeabilized cells
Coupling state: OXPHOS
HRR: Oxygraph-2k
