Elevated urinary excretion of endothelin-like immunoreactivity in children with renal disease is related to urine flow rate. Academic Article Article uri icon

Overview

MeSH

  • Adolescent
  • Child
  • Child, Preschool
  • Female
  • Glomerular Filtration Rate
  • Humans
  • Kidney Transplantation
  • Male
  • Radioimmunoassay

MeSH Major

  • Endothelins
  • Kidney Diseases
  • Urodynamics

abstract

  • Endothelin 1-21 belongs to a family of locally produced regulatory peptides with potent vasoconstrictor activity and profound renal effects. To study the biological significance of endothelin in children with renal diseases, we measured urinary endothelin-like immunoreactivity (ETir) excretion in children and adolescents (60 normal controls and 57 patients with renal disease). ETir excretion was constant during childhood and adolescence (4-18 years). Compared to these normal controls elevated urinary excretions of ETir were found in children with chronic renal failure, following renal transplantation and with idiopathic hypercalciuria (all groups p < 0.001). However, ETir excretion was unchanged in children with idiopathic steroid sensitive nephrotic syndrome, with stable chronic glomerulonephritis and in 4 patients with hemolytic uremic syndrome. Urinary ETir concentrations were similar in controls and in various patient groups. ETir excretion correlated positively with urine flow rate in normal controls (r = 0.71) and in all patients studied (r = 0.91). Fractional excretion of ETir correlated negatively with glomerular filtration rate. Eight healthy volunteers (23-27 years old, 4 female, 4 male) were studied before and after oral water load (20 ml/kg) to investigated the effect of ETir excretion on urine flow rate. Urine flow rose tenfold in response to water load and urine concentration of ETir fell only by factor 3 and urinary ETir excretion rose fivefold. These results indicate that urinary ETir excretion is related to and depends at least in part on urine flow rate. ETir excretion may so reflect a role of ETir in renal disease, especially in the diuretic state.

publication date

  • June 1994

has subject area

  • Adolescent
  • Child
  • Child, Preschool
  • Endothelins
  • Female
  • Glomerular Filtration Rate
  • Humans
  • Kidney Diseases
  • Kidney Transplantation
  • Male
  • Radioimmunoassay
  • Urodynamics

Research

keywords

  • Comparative Study
  • Journal Article

Identity

Language

  • eng

PubMed ID

  • 8076435

Additional Document Info

start page

  • 331

end page

  • 337

volume

  • 41

number

  • 6