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International Journal of Cell Cloning, Vol 5, 492-503, Copyright © 1987 by AlphaMed Press

ORIGINAL ARTICLES

Characterization of the human erythroid progenitor cells responsive to the erythropoietic-enhancing activity found in normal human serum

G Mouchiroud and JP Blanchet
Laboratoire de Biologie Cellulaire, Universite Claude Bernard Lyon I, Villeurbanne, France.

Normal human serum significantly increased the growth of erythroid colonies from bone marrow colony-forming units-erythroid (CFU-e) which were enriched by using a set of monoclonal antibodies in a panning technique. This activity was still observed in cultures of enriched CFU- e plated near the limiting cell dilution. When the addition of erythropoietin was delayed so that only early CFU-e could survive, we observed that the growth of erythroid colonies was less affected in cultures containing erythropoietin and normal serum than in those containing erythropoietin only. We have concluded from this study that normal human serum acts on in vitro erythropoiesis by directly stimulating the growth of a population of early CFU-e.




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Copyright © 1987 by AlphaMed Press.