title: Elevated plasma copper in chronic renal failure.
abstract: Hypercupremia has been described in patients undergoing chronic dialysis. To further characterize dialysis-associated hypercupremia, we studied plasma copper (PCu) and ceruloplasmin (Cp) in patients on hemodialysis (n = 20) and peritoneal dialysis (n = 25), in uremic patients (n = 10) not yet on dialysis, and in normal age-matched control subjects (n = 20). PCu was significantly elevated in all three patients groups (mean +/- SD) (20.6 +/- 4.1, 19.8 +/- 4.6, 19.8 +/- 4.9 mumol/L, respectively) vs control subjects (16.5 +/- 2.7 mumol/L). However, Cp levels were not significantly different among the four study groups (330 +/- 60, 320 +/- 70, 370 +/- 100, and 360 +/- 90 mg/L, respectively). Calculated nonceruloplasmin copper was significantly higher in all uremic groups. The measurement of chelatable Cu confirmed the presence of significantly higher extractable Cu in hemodialysis (2.7 +/- 0.6 mumol/L) and peritoneal dialysis patients (2.4 +/- 0.5 mumol/L) than control subjects (1.5 +/- 0.3 mumol/L). Cu is elevated in uremia regardless of dialysis status and this elevation is not accounted for by an increase in plasma ceruloplasmin.
authors: Department of Medicine, Wayne State University School of Medicine, Detroit, MI 48201.
authors: J H
authors: JH
authors: Sondheimer
authors: S K
authors: SK
authors: Mahajan
authors: D L
authors: DL
authors: Rye
authors: D K
authors: DK
authors: Abu-Hamdan
authors: S D
authors: SD
authors: Migdal
authors: A S
authors: AS
authors: Prasad
authors: F D
authors: FD
authors: McDonald
mesh_terms: D000328:Adult; D002570:Ceruloplasmin / Q000378:metabolism; D003300:Copper / Q000097:blood*; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000097:blood*; D008297:Male; D008875:Middle Aged
chemical_list: D003300:Copper; D002570:Ceruloplasmin