Pflügers Archiv

, Volume 333, Issue 4, pp 281–296 | Cite as

Blockade by tetraethylammonium (TEA) and rubidium of potassium exchange in sartorius muscle fibers: Distribution of14C-TEA in muscle

  • Robert L. Volle
  • Silas N. Glisson
  • Edward G. Henderson


Tetraethylammonium (TEA) causes a blockade of42K-exchange in resting sartorius muscle by a mechanism that differs from that caused by rubidium ions. Whereas the blockade by rubidium of42K-efflux was antagonized by elevation of extracellular potassium, that caused by TEA was antagonized only partially. Rubidium-induced blockade has characteristics of competitive inhibition of42K-exchange while the TEA-induced blockade appears to be non-competitive. Moreover, TEA causes a greater blockade of42K-exchange in muscles bathed in hypertonic solutions than in muscles bathed in isotonic solutions. This finding may be related to the more rapid rate of42K-exchange in muscles bathed in hypertonic solutions. The equilibrium constant for the interaction between TEA and membrane receptors estimated during42K-efflux is approximately 20 mM; the equilibrium constant for rubidium ions is 1.4 mM. The14C-TEA space in sartorius muscle is about 2-times greater than the14C-inulin or sodium spaces but somewhat smaller than14C-urea space. The rates of efflux14C-TEA,14C-inulin and14C-urea are comparable and rapid. Thus, the muscle membrane does not appear to offer a barrier to the exchange of TEA.

Key words

Tetraethylammonium Rubidium 42K-Exchange Sartorius Muscle 14C-TEA-Distribution 


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Copyright information

© Springer-Verlag 1972

Authors and Affiliations

  • Robert L. Volle
    • 1
  • Silas N. Glisson
    • 1
  • Edward G. Henderson
    • 1
  1. 1.Department of Pharmacology, University of Connecticut Health CenterMcCook HospitalHartfordUSA

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