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Endothelin induces potent microvascular constriction.

S D Brain1, J R Tippins, T J Williams

  • 1Section of Vascular Biology, MRC Clinical Research Centre, Harrow, Middx.

British Journal of Pharmacology
|December 1, 1988
PubMed
Summary
This summary is machine-generated.

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Endothelin, a peptide from endothelial cells, strongly constricts blood vessels. This study shows endothelin also constricts microvasculature, impacting blood flow and pressure regulation.

Area of Science:

  • Vascular Biology
  • Cardiovascular Physiology

Background:

  • Endothelin is a peptide produced by endothelial cells.
  • Endothelin exhibits potent vasoconstrictor effects on major arteries in vitro and raises blood pressure in vivo.

Purpose of the Study:

  • To investigate the effect of endothelin on microvascular blood flow.
  • To determine if endothelin has vasoconstrictor activity in the microvasculature.

Main Methods:

  • Utilized the xenon clearance technique to measure blood flow changes in rabbit skin.
  • Administered endothelin intradermally into rabbit skin.

Main Results:

  • Endothelin decreased local skin blood flow in a dose-dependent manner.
  • Endothelin reduced basal skin blood flow and counteracted vasodilator-induced increases in blood flow.

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Conclusions:

  • Extravascular administration of endothelin demonstrates potent vasoconstrictor activity.
  • Endothelin likely plays a significant role in the physiological control of blood flow and pressure.