Difference between revisions of "Debska 2001 Brain Res"
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|topics=Coupling; Membrane Potential | |topics=Coupling; Membrane Potential | ||
|discipline=Mitochondrial Physiology | |discipline=Mitochondrial Physiology | ||
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Revision as of 09:41, 26 March 2012
| Debska G, May R, Kicinska A, Swewczyk A, Elger C, Kunz WS (2001) Potassium channel openers depolarize hippocampal mitochondria. Brain Res 892: 42-50. |
Debska G, May R, Kicinska A, Swewczyk A, Elger C, Kunz WS (2001) Brain Res.
Abstract: We investigated the effect of the potassium channel openers diazoxide and RP66471 on mitochondrial membrane potential and mitochondrial respiration in digitonin-treated rat hippocampal homogenates. Both diazoxide and RP66471 induced a dose-dependent decrease of mitochondrial membrane potential. Concomitant with the depolarization was an increase of mitochondrial respiration. Furthermore, the mitochondrial membrane depolarization induced by diazoxide and RP66471 was significantly larger in the presence of potassium ions than in the presence of sodium ions. The diazoxide-induced (but not RP66471-induced) mitochondrial membrane depolarization was partially inhibited by blockers of the ATP-regulated potassium channel, 5-hydroxydecanoic acid or the antidiabetic sulfonylurea glibenclamide. In addition, the potassium channel openers diazoxide and RP66471 increased mitochondrial matrix volume and induced a release of cytochrome c from hippocampal mitochondria. These results indicate the presence of a mitochondrial ATP-regulated potassium channel in rat hippocampus being a target for potassium channel openers. • Keywords: Hippocampus, Mitochondria, Potassium channel opener, Glibenclamide, 5-Hydroxydecanoic acid, Mitochondrial ATP-regulated potassium channel
Labels:
Organism: Rat
Tissue;cell: Neurons; Brain"Neurons; Brain" 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: Homogenate
Regulation: 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
