Transfusional iron overload in patients undergoing dialysis: treatment with erythropoietin and phlebotomy.
Five patients undergoing long-term hemodialysis with transfusional iron overload received treatment for 18 weeks with a regimen of recombinant human erythropoietin (150 U/kg) and regular phlebotomy to maintain the hematocrit value at 25% and reduce the total body iron burden. In the 149 phlebotomy sessions performed in these patients, a mean of 228 +/- 8 ml (mean +/- SEM) of whole blood was removed; it had a hematocrit value of 27.7% +/- 0.2%. The iron content of the erythrocytes removed (erythrocyte iron concentration, 787 +/- 11 micrograms/ml in 133 samples) accounted for more than 99% of the total iron removal by phlebotomy. Serum iron (serum iron concentration, 1.57 +/- 0.09 micrograms/ml in 65 samples) accounted for an insignificant fraction of the total iron removed. The iron removed at each phlebotomy session averaged 49.1 +/- 2.0 mg, similar to the amount of iron removed with deferoxamine administration in patients undergoing dialysis who had iron overload, but without the potential for adverse side effects reported with long-term deferoxamine therapy. Total iron removal during the 18 weeks of this study ranged from 732 to 2797 mg. Mean serum ferritin level decreased from 3189 +/- 1076 micrograms/L to 1676 +/- 342 micrograms/L (p less than 0.02, Wilcoxon signed rank test). When compared with a group of five patients without transfusional iron overload who received recombinant human erythropoietin and did not undergo therapeutic phlebotomy, the patients with iron overload had much greater iron losses and a larger decrease in serum ferritin levels.(ABSTRACT TRUNCATED AT 250 WORDS)
Division of Nephrology and Internal Medicine, Mayo Clinic, Rochester, MN 55905.
J T
JT
McCarthy
W J
WJ
Johnson
D E
DE
Nixon
B M
BM
Jenson
T P
TP
Moyer
D000328:Adult; D000368:Aged; D001815:Bloodletting; D003676:Deferoxamine / Q000627:therapeutic use; D004921:Erythropoietin / Q000627:therapeutic use*; D005260:Female; D005293:Ferritins / Q000097:blood; D006400:Hematocrit; D006801:Humans; D007501:Iron / Q000097:blood*; D008297:Male; D008875:Middle Aged; D011994:Recombinant Proteins / Q000627:therapeutic use; D006435:Renal Dialysis; D065227:Transfusion Reaction
D011994:Recombinant Proteins; D004921:Erythropoietin; D005293:Ferritins; D007501:Iron; D003676:Deferoxamine