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Generation and Transmission of Endothelium-Dependent Vasodilator Signals

  • Rudi Busse
  • Andreas Lückhoff
  • Ulrich Pohl

Abstract

The crucial role of the endothelium in the local control of vascular tone by the release of vasoactive autacoids has only become apparent during the last decade. The most important of these autacoids, released under basal and stimulated conditions appear to be prostacyclin (PGI2) (Moncada, 1985) and the very unstable endothelium-derived relaxant factor (EDRF) (Furchgott, 1983). The latter was recently identified as nitric oxide (Palmer et al., 1987). A large number of endogenous vasoactive substances (e.g. acetylcholine, ATP, bradykinin, histamine and substance P) as well as biophysical conditions (low oxygen tension, viscous drag on the luminal surface of the endothelial cells, pulsatile stretching of the vascular wall) have been found to stimulate the release of both autacoids (Bassenge and Busse, 1988; Furchgott, 1983). The mechanisms of vasodilation elicited by both autacoids are different. While the smooth muscle relaxation induced by PGI2 is correlated with an increase in cellular cyclic AMP, that induced by EDRF is associated with a rise in cyclic GMP.

Keywords

Soluble Guanylate Cyclase Intracellular Free Calcium Femoral Blood Flow Washed Human Platelet Reduce Oxygen Uptake 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Rudi Busse
    • 1
  • Andreas Lückhoff
    • 1
  • Ulrich Pohl
    • 1
  1. 1.Department of Applied PhysiologyUniversity of FreiburgFreiburgGermany

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