The effect of renal function on changes in circulating concentrations of 1,25-dihydroxycholecalciferol after an oral dose

Clin Sci (Lond). 1982 Apr;62(4):427-9. doi: 10.1042/cs0620427.


1. 1,25- Dihydroxycholecalciferol [1,25-(OH)2D3] was administered orally to four normal subjects and six patients with chronic renal failure not on dialysis. The serum concentration of 1,25-(OH)2D3 was measured by radioimmunoassay in both groups from samples taken before, and at regular intervals up to 48 h after, the oral dose. 2. The plasma half-time for the disappearance of the administered 1,25-(OH)2D3 was estimated by determining the time for a 50% reduction from the peak increment of the sterol. In normal subjects the calculated value ranged from 5 to 8 h compared with 18 to 44 h in uraemic patients. 3. It appears from our studies that in uraemic subjects there is impaired ability to metabolize or excrete 1,25-(OH)2D3.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Calcitriol / blood*
  • Half-Life
  • Humans
  • Kidney Failure, Chronic / blood*
  • Male
  • Uremia / blood


  • Calcitriol