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Difference between revisions of "Steinlechner-Maran 1996 Am J Physiol Cell Physiol"

From Bioblast
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|tissues=Endothelial; Epithelial; Mesothelial Cell
|tissues=Endothelial; Epithelial; Mesothelial Cell
|model cell lines=HUVEC
|model cell lines=HUVEC
|preparations=Intact Cell; Cultured; Primary
|preparations=Intact cells
|injuries=Hypoxia
|topics=mt-Biogenesis; mt-density, Respiration
|topics=mt-Biogenesis; mt-density, Respiration
|couplingstates=ROUTINE, ETS
|couplingstates=ROUTINE, ETS
|kinetics=Oxygen, Uncoupler
|kinetics=Oxygen, Uncoupler
|injuries=Hypoxia
|instruments=Oxygraph-2k
|instruments=Oxygraph-2k
|discipline=Mitochondrial Physiology
|discipline=Mitochondrial Physiology
}}
}}

Revision as of 08:10, 8 August 2013

Publications in the MiPMap
Steinlechner-Maran R, Eberl T, Kunc M, Margreiter R, Gnaiger E (1996) Oxygen dependence of respiration in coupled and uncoupled endothelial cells. Am J Physiol Cell Physiol 271: C2053-C2061.

Β» PMID: 8997208

Steinlechner-Maran R, Eberl T, Kunc M, Margreiter R, Gnaiger E (1996) Am J Physiol Cell Physiol

Abstract: We studied the oxygen dependence of respiration in cultured human umbilical vein endothelial cells by use of high-resolution respirometry. The rate of oxygen consumption varied from 30 to 50 pmol O2 .s-1.10-6 cells over a sixfold range of cell densities. Respiration was stimulated up to 3.5-fold by uncoupling with carbonyl cyanide p-trifluoromethoxyphenylhydrazone or 2,4-dinitrophenol, and the PO2 at half-maximal respiration (P50) increased from 0.05 to 0.12 kPa (0.3 to 0.9 Torr) with respiratory rate. P50 decreased to a minimum of 0.02 kPa when uncoupled cells were inhibited to control levels. Differences in cell size explained a variation of approximately 0.015 kPa in P50 at similar respiratory rates per cell. Oxygen diffusion to mitochondria contributed maximally 30% to the regulation of P50 in coupled cells, as deduced from the shallow slope of the flux dependence of P50 in uncoupled-inhibited cells compared with the slope in coupled cells. Therefore 70% of the flux dependence of P50 in coupled cells was caused by changes in metabolic state, which correlated with respiratory rate.


β€’ O2k-Network Lab: AT_Innsbruck_Gnaiger E, AT Innsbruck MitoCom


Labels:

Stress:Hypoxia  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 cells 

Regulation: mt-Biogenesis; mt-density"mt-Biogenesis; mt-density" 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., Respiration"Respiration" 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: ROUTINE, ETS"ETS" is not in the list (LEAK, ROUTINE, OXPHOS, ET) of allowed values for the "Coupling states" property. 

HRR: Oxygraph-2k