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We began analyzing https://link.springer.com/article/10.1007/s00232-004-0676-9, but it redirected us to https://link.springer.com/article/10.1007/s00232-004-0676-9. The analysis below is for the second page.

Title[redir]:
Quinine Inhibits Mitochondrial ATP-regulated Potassium Channel from Bovine Heart | The Journal of Membrane Biology
Description:
The mitochondrial ATP-regulated potassium (mitoKATP) channel has been suggested as trigger and effector in myocardial ischemic preconditioning. However, molecular and pharmacological properties of the mitoKATP channel remain unclear. In the present study, single-channel activity was measured after reconstitution of the inner mitochondrial membrane from bovine ventricular myocardium into bilayer lipid membrane. After incorporation, a potassium-selective current was recorded with mean conductance of 103 ± 9 pS in symmetrical 150 mM KCl. Single-channel activity of this reconstituted protein showed properties of the mitoKATP channel: it was blocked by 500 μM ATP/Mg, activated by the potassium-channel opener diazoxide at 30 μM, inhibited by 50 μM glibenclamide or 150 μM 5-hydroxydecanoic acid, and was not affected by the plasma membrane ATP-regulated potassium-channel blocker HMR1098 at 100 μM. We observed that the mitoKATP channel was blocked by quinine in the micromolar concentration range. The inhibition by quinine was additionally verified with the use of 86Rb+ flux experiments and submitochondrial particles. Quinine inhibited binding of the sulfonylurea derivative [3H]glibenclamide to the inner mitochondrial membrane. We conclude that quinine inhibits the cardiac mitoKATP channel by acting on the mitochondrial sulfonylurea receptor.

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Keywords {🔍}

channel, quinine, mitochondrial, google, scholar, mitokatp, membrane, pubmed, mitochondria, potassium, article, singlechannel, szewczyk, activity, channels, heart, kcl, cistrans, glibenclamide, solution, observed, open, conditions, bovine, binding, transport, smp, addition, control, recordings, garlid, figure, properties, diazoxide, effect, blm, vesicles, presence, closed, state, biol, inhibits, cardiac, atpsensitive, katp, gradient, rat, study, inhibition, flux,

Topics {✒️}

g-protein-gated inwardly rectifying patch-clamp single-channel recordings mitochondrial atp-regulated potassium atp-regulated potassium channel figure 4a shows histograms marquardt-lsq fitting method full size image atp-sensitive potassium channel ion channel-mediated fluxes fluorescent probe bodipy-glibenclamide block cation-selective current myocardial katp channels potassium-channel opener diazoxide single-channel amplitude decreased potassium-channel openers potassium channel openers article download pdf single-ion-channel activity sulfonylurea derivative [3h]glibenclamide low-affinity binding sites inhibits [3h]glibenclamide binding single-channel current traces single-channel activity induced chloride channels 5-ht1a receptor-mediated activation ion-specific channels intracellular ion channels sarcolemmal katp channels figure 2b shows anti-malarial drug previously mitokatp single-channel properties potassium channel opener modulate single-channel activity study single-channel properties myocardial ischemic preconditioning [3h]glibenclamide-binding studies membrane biology aims atp/mg-inhibited channel bilayer lipid membrane potassium-selective current privacy choices/manage cookies ion-conducting pathways potassium channels external potassium ions electrical diffusion potential mitochondrial katp channel bilayer membrane amplifier rat liver mitochondria increase potassium transport mitochondrial volume homeostasis

Questions {❓}

  • Marban (1999) Mitochondria: a new target for potassium channel openers?

Schema {🗺️}

WebPage:
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         headline:Quinine Inhibits Mitochondrial ATP-regulated Potassium Channel from Bovine Heart
         description:The mitochondrial ATP-regulated potassium (mitoKATP) channel has been suggested as trigger and effector in myocardial ischemic preconditioning. However, molecular and pharmacological properties of the mitoKATP channel remain unclear. In the present study, single-channel activity was measured after reconstitution of the inner mitochondrial membrane from bovine ventricular myocardium into bilayer lipid membrane. After incorporation, a potassium-selective current was recorded with mean conductance of 103 ± 9 pS in symmetrical 150 mM KCl. Single-channel activity of this reconstituted protein showed properties of the mitoKATP channel: it was blocked by 500 μM ATP/Mg, activated by the potassium-channel opener diazoxide at 30 μM, inhibited by 50 μM glibenclamide or 150 μM 5-hydroxydecanoic acid, and was not affected by the plasma membrane ATP-regulated potassium-channel blocker HMR1098 at 100 μM. We observed that the mitoKATP channel was blocked by quinine in the micromolar concentration range. The inhibition by quinine was additionally verified with the use of 86Rb+ flux experiments and submitochondrial particles. Quinine inhibited binding of the sulfonylurea derivative [3H]glibenclamide to the inner mitochondrial membrane. We conclude that quinine inhibits the cardiac mitoKATP channel by acting on the mitochondrial sulfonylurea receptor.
         datePublished:
         dateModified:
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            Heart mitochondrial
            Potassium channel
            Quinine
            Glibenclamide
            Potassium channel openers
            Bilayer lipid membrane
            Biochemistry
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      headline:Quinine Inhibits Mitochondrial ATP-regulated Potassium Channel from Bovine Heart
      description:The mitochondrial ATP-regulated potassium (mitoKATP) channel has been suggested as trigger and effector in myocardial ischemic preconditioning. However, molecular and pharmacological properties of the mitoKATP channel remain unclear. In the present study, single-channel activity was measured after reconstitution of the inner mitochondrial membrane from bovine ventricular myocardium into bilayer lipid membrane. After incorporation, a potassium-selective current was recorded with mean conductance of 103 ± 9 pS in symmetrical 150 mM KCl. Single-channel activity of this reconstituted protein showed properties of the mitoKATP channel: it was blocked by 500 μM ATP/Mg, activated by the potassium-channel opener diazoxide at 30 μM, inhibited by 50 μM glibenclamide or 150 μM 5-hydroxydecanoic acid, and was not affected by the plasma membrane ATP-regulated potassium-channel blocker HMR1098 at 100 μM. We observed that the mitoKATP channel was blocked by quinine in the micromolar concentration range. The inhibition by quinine was additionally verified with the use of 86Rb+ flux experiments and submitochondrial particles. Quinine inhibited binding of the sulfonylurea derivative [3H]glibenclamide to the inner mitochondrial membrane. We conclude that quinine inhibits the cardiac mitoKATP channel by acting on the mitochondrial sulfonylurea receptor.
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      dateModified:
      pageStart:63
      pageEnd:72
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         Potassium channel
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         Glibenclamide
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         Bilayer lipid membrane
         Biochemistry
         general
         Human Physiology
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                  address:
                     name:Department of Biophysics, Agricultural University SGGW, Warszawa, Poland
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