Long-term effects of recombinant human erythropoietin on bone marrow progenitor cells.
Eleven uraemic patients were treated with recombinant human erythropoietin (rHuEpo). Seven haemodialysis patients and four peritoneal dialysis patients received a starting dose of 80 IU/kg i.v. and 40 IU/kg s.c. respectively, thrice weekly. The number of burst-forming-unit erythroid (BFU-E), colony-forming-unit erythroid (CFU-E), granulocyte-monocyte (CFU-GM) and megakaryocyte (CFU-Mk) were assayed 2 weeks before (D0), and 1 (M1) and 6 months (M6) after the initiation of rHuEpo treatment by means of a commonly applied in-vitro clonal assay. All the patients showed the same haematopoietic response. A significant increase of CFU-E and CFU-Mk could be observed within 1 month of treatment. At this time, no significant modification was observed in BFU-E and CFU-GM number. At the 6th month the increase of CFU-E was maintained, whereas a significant fall of BFU-E, CFU-GM and CFU-Mk was observed. These results suggest that in-vivo effects of rHuEpo are not restricted to the erythroid lineage but that erythropoietin might also act as a co-factor of megakaryopoiesis. In the long term erythropoietin might induce erythroid differentiation in multipotent progenitor cells at the expense of the non-erythroid progenitors.
Service de Néphrologie, Hôpital Tenon, Paris, France.
B
B
Jaar
C
C
Baillou
B
B
Viron
C
C
Michel
F
F
Mignon
A
A
Najman
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001853:Bone Marrow / Q000187:drug effects*; D001854:Bone Marrow Cells; D002478:Cells, Cultured; D015672:Erythroid Precursor Cells / Q000187:drug effects; D004921:Erythropoietin / Q000494:pharmacology*; D005260:Female; D006412:Hematopoietic Stem Cells / Q000187:drug effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011994:Recombinant Proteins / Q000494:pharmacology
D011994:Recombinant Proteins; D004921:Erythropoietin