Very low concentrations of the vasoconstrictor peptide endothelin cause intense long-lasting renal vasoconstriction. In the isolated perfused rat kidney, the concentration of endothelin required to reduce blood-flow by 50% is 200 pmol/l, compared with 1000 pmol/l angiotensin II (previously the most potent known vasoconstrictor). Whereas angiotensin II has little effect on the glomerular filtration rate (GFR), a rise in endothelin from 100 to 800 pmol/l reduces GFR by 90%. Endothelin is probab...Expand abstract
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Endothelin: an important factor in acute renal failure?
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