Difference between revisions of "Stadlmann 2002 Transplantation"
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|abstract=Oxidative stress to vascular endothelium plays an important role in cold ischemia-reperfusion (CIR) injury. We compared mitochondrial and plasma membrane integrity in human endothelial cells after 20-min exposure to 500 ยตM H<sub>2</sub>O<sub>2</sub> or 8-hr cold ischemia and simulated reperfusion. In both groups, plasma membrane integrity was maintained but respiration was significantly decreased, as measured by high-resolution respirometry. Uncoupling was more pronounced after H<sub>2</sub>O<sub>2</sub> exposure compared with CIR. After H<sub>2</sub>O<sub>2</sub> exposure, complex I respiration was significantly reduced, whereas CIR resulted additionally in a significant inhibition of complex II and IV respiration. Our results point to a partial overlap of the patterns of mitochondrial defects after H2O2-mediated and CIR injury. In this respect, H<sub>2</sub>O<sub>2</sub>ย exposure proved to be a useful model to study the mechanisms of CIR injury to human endothelial cells, whereas the full pattern of CIR injury could not be induced by a pulse of hydrogen peroxide exposure. | |abstract=Oxidative stress to vascular endothelium plays an important role in cold ischemia-reperfusion (CIR) injury. We compared mitochondrial and plasma membrane integrity in human endothelial cells after 20-min exposure to 500 ยตM H<sub>2</sub>O<sub>2</sub> or 8-hr cold ischemia and simulated reperfusion. In both groups, plasma membrane integrity was maintained but respiration was significantly decreased, as measured by high-resolution respirometry. Uncoupling was more pronounced after H<sub>2</sub>O<sub>2</sub> exposure compared with CIR. After H<sub>2</sub>O<sub>2</sub> exposure, complex I respiration was significantly reduced, whereas CIR resulted additionally in a significant inhibition of complex II and IV respiration. Our results point to a partial overlap of the patterns of mitochondrial defects after H2O2-mediated and CIR injury. In this respect, H<sub>2</sub>O<sub>2</sub>ย exposure proved to be a useful model to study the mechanisms of CIR injury to human endothelial cells, whereas the full pattern of CIR injury could not be induced by a pulse of hydrogen peroxide exposure. | ||
|keywords=Latent mitochondrial dysfunction | |keywords=Latent mitochondrial dysfunction | ||
|mipnetlab=AT_Innsbruck_Gnaiger E | |mipnetlab=AT_Innsbruck_Gnaiger E, AT Innsbruck MitoCom | ||
|discipline=Mitochondrial Physiology, Biomedicine | |discipline=Mitochondrial Physiology, Biomedicine | ||
}} | }} | ||
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|tissues=Endothelial; Epithelial; Mesothelial Cell | |tissues=Endothelial; Epithelial; Mesothelial Cell | ||
|preparations=Intact Cell; Cultured; Primary, Permeabilized cells | |preparations=Intact Cell; Cultured; Primary, Permeabilized cells | ||
|topics= | |couplingstates=OXPHOS | ||
|topics=Substrate; Glucose; TCA Cycle | |||
|additional=Latent mitochondrial dysfunction, Environmental Physiology; Toxicology | |additional=Latent mitochondrial dysfunction, Environmental Physiology; Toxicology | ||
|discipline=Mitochondrial Physiology, Biomedicine | |discipline=Mitochondrial Physiology, Biomedicine | ||
}} | }} |
Revision as of 14:21, 6 December 2012
Stadlmann S, Rieger G, Amberger A, Kuznetsov AV, Margreiter R, Gnaiger E (2002) H2O2-mediated oxidative stress versus cold ischemia-reperfusion: mitochondrial respiratory defects in cultured human endothelial cells. Transplantation 74: 1800-1803. |
Stadlmann S, Rieger G, Amberger A, Kuznetsov AV, Margreiter R, Gnaiger E (2002) Transplantation
Abstract: Oxidative stress to vascular endothelium plays an important role in cold ischemia-reperfusion (CIR) injury. We compared mitochondrial and plasma membrane integrity in human endothelial cells after 20-min exposure to 500 ยตM H2O2 or 8-hr cold ischemia and simulated reperfusion. In both groups, plasma membrane integrity was maintained but respiration was significantly decreased, as measured by high-resolution respirometry. Uncoupling was more pronounced after H2O2 exposure compared with CIR. After H2O2 exposure, complex I respiration was significantly reduced, whereas CIR resulted additionally in a significant inhibition of complex II and IV respiration. Our results point to a partial overlap of the patterns of mitochondrial defects after H2O2-mediated and CIR injury. In this respect, H2O2 exposure proved to be a useful model to study the mechanisms of CIR injury to human endothelial cells, whereas the full pattern of CIR injury could not be induced by a pulse of hydrogen peroxide exposure. โข Keywords: Latent mitochondrial dysfunction
โข O2k-Network Lab: AT_Innsbruck_Gnaiger E, AT Innsbruck MitoCom
Labels:
Stress:Ischemia-Reperfusion; Preservation"Ischemia-Reperfusion; Preservation" 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., RONS; Oxidative Stress"RONS; Oxidative Stress" 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. Organism: Human 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: Intact Cell; Cultured; Primary"Intact Cell; Cultured; Primary" is not in the list (Intact organism, Intact organ, Permeabilized cells, Permeabilized tissue, Homogenate, Isolated mitochondria, SMP, Chloroplasts, Enzyme, Oxidase;biochemical oxidation, ...) of allowed values for the "Preparation" property., Permeabilized cells
Regulation: Substrate; Glucose; TCA Cycle"Substrate; Glucose; TCA Cycle" is not in the list (Aerobic glycolysis, ADP, ATP, ATP production, AMP, Calcium, Coupling efficiency;uncoupling, Cyt c, Flux control, Inhibitor, ...) of allowed values for the "Respiration and regulation" property. Coupling state: OXPHOS
HRR: Oxygraph-2k
Latent mitochondrial dysfunction, Environmental Physiology; Toxicology