Urinary excretion of endothelin-1 in normal subjects and patients with renal disease

Kidney Int. 1991 Feb;39(2):307-11. doi: 10.1038/ki.1991.38.


To elucidate the pathophysiological significance of urinary endothelin-1 (ET-1), we measured urinary excretion of ET-1-like immunoreactivity (L1) in 17 patients with renal disease and 9 normal subjects. Twenty-four hour urinary ET-1-L1 excretion in patients with renal disease (358 +/- 68 ng, mean +/- SE) was significantly (P less than 0.005) greater than that of normal subjects (77 +/- 5 ng). In patients with renal disease. ET-1-L1 clearance (CET) exceeded creatinine clearance (CCR); CET/CCR (305 +/- 81%) was significantly (P less than 0.005) greater than that of normal subjects (43 +/- 13%). The 24-hour urinary excretion of ET-1-L1 in patients with renal disease showed significant correlation with that of N-acetyl-beta-D-glucosaminidase (r = 0.587, P less than 0.05), beta 2-microglobulin (r = 0.614, P less than 0.01) and albumin (r = 0.484, P less than 0.05). Intravenous infusion of saline (500 ml) in seven normal subjects did not affect urinary ET-1 excretion rate. These data suggest that urinary excretion of ET-1 derives mainly from renal tubular secretion at least in patients with renal disease, and that degradation and/or reabsorption of ET-1 at the tubular site may also contribute to the renal handling of ET-1. Therefore, urinary excretion of ET-1 should serve as a potential marker for renal injury.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetylglucosaminidase / urine
  • Adult
  • Albuminuria / urine
  • Endothelins / urine*
  • Female
  • Humans
  • Kidney Diseases / urine*
  • Kidney Function Tests
  • Kidney Tubules / physiology
  • Male
  • Radioimmunoassay
  • beta 2-Microglobulin / urine


  • Endothelins
  • beta 2-Microglobulin
  • Acetylglucosaminidase