Difference between revisions of "Debska 2001 Brain Res"
| Line 1: | Line 1: | ||
{{Publication | {{Publication | ||
|title=Debska G, May R, Kicinska A, Swewczyk A, Elger C, Kunz WS (2001) Potassium channel openers depolarize hippocampal mitochondria. Brain Res. 892: 42-50. | |title=Debska G, May R, Kicinska A, Swewczyk A, Elger C, Kunz WS (2001) Potassium channel openers depolarize hippocampal mitochondria. Brain Res. 892: 42-50. | ||
|authors=Debska G, May R, Kicinska A, Swewczyk A, Elger C, Kunz WS | |||
|year=2001 | |year=2001 | ||
|journal=Brain Research | |journal=Brain Research | ||
|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. | |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 | |keywords=Hippocampus, Mitochondria, Potassium channel opener, Glibenclamide, 5-Hydroxydecanoic acid, Mitochondrial ATP-regulated potassium channel | ||
|info=[http://www.ncbi.nlm.nih.gov/pubmed/11172747 PMID: 11172747] | |info=[http://www.ncbi.nlm.nih.gov/pubmed/11172747 PMID: 11172747] | ||
}} | }} | ||
| Line 14: | Line 15: | ||
|topics=Respiration; OXPHOS; ETS Capacity, Coupling; Membrane Potential | |topics=Respiration; OXPHOS; ETS Capacity, Coupling; Membrane Potential | ||
|instruments=Oxygraph-2k | |instruments=Oxygraph-2k | ||
}} | }} | ||
Revision as of 09:21, 20 October 2010
| 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 Research
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
Preparation: Isolated Mitochondria"Isolated Mitochondria" 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. Enzyme: Inner mtMembrane Transporter"Inner mtMembrane Transporter" is not in the list (Adenine nucleotide translocase, Complex I, Complex II;succinate dehydrogenase, Complex III, Complex IV;cytochrome c oxidase, Complex V;ATP synthase, Inner mt-membrane transporter, Marker enzyme, Supercomplex, TCA cycle and matrix dehydrogenases, ...) of allowed values for the "Enzyme" 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
