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Difference between revisions of "Steinlechner-Maran 1997 Transplantation"

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Revision as of 18:56, 7 November 2011

Publications in the MiPMap
Steinlechner-Maran R, Eberl T, Kunc M, Schröcksnadel H, Margreiter R, Gnaiger E (1997) Respiratory defect as an early event in preservation/reoxygenation injury in endothelial cells. Transplantation 63: 136-142.

» PMID: 9000675

Steinlechner-Maran R, Eberl T, Kunc M, Schroecksnadel H, Margreiter R, Gnaiger E (1997) Transplantation

Abstract: Characterization of preservation injury in endothelial cells has been primarily accomplished by measurement of cell viability. To analyze early events and cellular mechanisms of preservation-reoxygenation injury, we developed high-resolution respirometry for the study of mitochondrial function in endothelial cells, to provide a quantitative marker for sublethal stress. Cultured human umbilical vein endothelial cells were stored for 4 and 8 hr at 4°C under an atmosphere of 95% N2 and 5% CO2 in University of Wisconsin (UW) and histidine-tryptophan-ketoglutarate (HTK) solutions. Respiration of suspended cells, measured after reoxygenation in growth medium at 37°C, was significantly reduced in all treatments in comparison to controls not subjected to cold preservation. In contrast, trypan blue staining was unchanged after 4 hr of preservation and was significant only after 8 hr. After 8 hr of cold storage in UW and HTK solutions, respiration was 64±5% and 49±6%, respectively, of controls (46.5±3.3 pmol O2·s-1·10-6 cells), indicating significantly better protection by UW solution than HTK solution. A titration regimen with substrate (succinate), uncoupler (carbonyl cyanide p-trifluorome-thoxyphenylhydrazone), and inhibitors of complexes I and III (rotenone and antimycin A) resulted in identical respiratory response patterns in all treatments. The plasma membrane remained impermeable to succinate. Inner mitochondrial membrane function was preserved as indicated by a constant relative increase of respiration after uncoupling. These results demonstrate that loss of catalytic capacity for respiration constitutes an early event in preservation-reoxygenation injury, whereas membrane damage is not a primary defect. Respirometric evaluation of sublethal cell injury and localization of cell damage may provide selective guidelines for further optimization of strategies in organ preservation.


O2k-Network Lab: AT_Innsbruck_Gnaiger E


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.  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. 

Regulation: Respiration; OXPHOS; ETS Capacity"Respiration; OXPHOS; ETS Capacity" 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; Membrane Potential"Coupling; Membrane Potential" 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. 


HRR: Oxygraph-2k