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The effects of acute administration of propranolol and practolol on the uptake, content, release, and turnover of noradrenaline in the rat heart in vivo

  • B. Lemmer
  • R. Saller
Article

Summary

The effect of the acute administration of (±)-, (+)-, and (−)-propranolol and practolol, respectively, on the cardiac turnover of noradrenaline was studied in male Wistar rats kept under controlled conditions of environmental lighting. Propranolol caused no or only minor effects on the turnover in concentrations of 0.001–0.1 mmoles/kg, whereas higher doses (0.2–0.4 mmoles/kg) decreased the noradrenaline turnover in rat hearts concomitantly with toxic signs from the CNS. The endogenous noradrenaline content was not changed by any concentration of propranolol. Practolol (0.1–0.4 mmoles/kg) did not influence the cardiac noradrenaline turnover, but, like an indirectly acting sympathomimetic drug, released noradrenaline.

Key words

Noradrenaline Turnover Rat Heart Propranolol Practolol Noradrenaline Content 

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Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • B. Lemmer
    • 1
  • R. Saller
    • 1
  1. 1.Zentrum der PharmakologieJohann Wolfgang Goethe-Universität Frankfurt am MainGermany

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