A N Verkhratskiĭ

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Thin cardiac slices (100-200 microns) from newborn (1-14 days old) rat heart ventricles were used for patch clamp recordings. High resistance seals (10-50 GOhms) between patch-clamp pipettes and the membrane of cardiac cells as well as classical patch-clamp configurations can be achieved on this preparation without any enzymatic treatment of tissue.(More)
In isolated, cultured neonatal rat ventricular myocytes calcium current was investigated by whole-cell patch clamp technique. The shift of holding potential values from -100-80 mV to -40 mV caused no significant changes in calcium current potential-dependent and kinetic properties. No calcium current component with preferential steady-state inactivation at(More)
In isolated, cultured neonatal rat ventricular myocytes sodium currents through calcium channels induced by lowering of extracellular calcium concentration 100 nmol/l have been investigated by whole-cell patch clamp technique. Such Na(+)-carried currents are modulated by classic Ca2+ agonists and antagonists. The potential-dependent characteristics of Na+(More)
Block of sodium currents by allapinine (diterpene alkaloid with strong antiarrhythmic properties) was investigated in isolated, voltage-clamped trigeminal neurons of a rat and single ventricular myocytes of a neonatal rat. Allapinine (in micromolar concentrations) produced a 70-90% decrease of the sodium current amplitude without any changes in(More)
Blockade of the high-threshold calcium currents by omega-conotoxin (CgTx) was investigated by patch-clamp recordings of whole-cell currents in cultured cells of pheochromocytoma PC12. CgTx (10 mumol/l) preferentially blocked only a steady-state component of the calcium current. Inactivated component was insensitive to CgTx (up to 50 mumol/l concentration).(More)
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