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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 304 (1968), S. 69-74 
    ISSN: 1432-2013
    Keywords: Potassium Deficiency ; Ouabain ; Rat Diaphragm ; Active Cationic Transport ; Alimentärer Kaliummangel ; Ouabain ; Rattenzwerchfell ; aktiver Kationentransport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Unter Einfluß von Ouabain (10−5 g/ml) fanden wir bei 377 Skeletmuskelzellen von 10 alimentär kaliumverarmten Ratten ein Membranpotential von −76,5 (s=±5,9) mV. Dieses Potential liegt um 15,2 mV niedriger als der Kontrollwert: −91,7 (s=±6,0) mV gemessen an 344 Zellen derselben Muskeln ohne Ouabaineinfluß. Die Untersuchungen wurden in vitro bei gleicher extracellulärer Kaliumkonzentration durchgeführt. — Ouabain bewirkt eine Depolarisation der Zellen kaliumverarmter Ratten auf gleiches Potentialniveau wie bei Normaltieren. — Es wird damit wahrscheinlich, daß die Hyperpolarisation der Zellen kaliumverarmter Tiere im Zusammenhang mit einem gesteigerten Natriumefflux zu sehen ist, welcher durch Ouabain hemmbar ist.
    Notes: Summary In 377 single muscle cells of 10 rats with alimentary potassium depletion we found under influence of ouabain (10−5 g/ml) a resting membrane potential (RMP) of −76.5 (s=±5.9) mV. This RMP is 15.2 mV lower than the control: −91.7 (s=±6.0) mV, measured in 344 cells of the same muscle without ouabain. The measurements were performed in vitro in a modified Krebs solution with constant extracellular potassium concentration. Ouabain produces a depolarisation in skeletal muscle cells of potassium depleted rats on the same level as in cells of normal animals. The data suggest that the hyperpolarisation in muscle cells of potassium depleted rats compared with normal animals has to be regarded as a consequence of stimulated sodiumefflux, which may be inhibited by ouabain.
    Type of Medium: Electronic Resource
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