title: Erythroid colony forming cells in aplastic anaemia.
abstract: The concentration and erythropoietin dependence of erythropoietic progenitor cells (CFU-E) were examined in 13 patients with aplastic anaemia at different stages of their disease. The CFU-E incidence was shown to be quantitatively diminished in aplastic anaemia but tended to recover to normal values if the disease recovered. In addition the CFU-E showed a qualitatively different response to stimulation by erythropoietin, being resistant to low concentrations but responsive to concentrations greater than 0.2 U/ml whereas there was a linear response in the controls up to 0.5 U/ml.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000741:Anemia, Aplastic / Q000473:pathology*; D001853:Bone Marrow / Q000473:pathology*; D002999:Clone Cells; D004305:Dose-Response Relationship, Drug; D004920:Erythropoiesis; D004921:Erythropoietin / Q000494:pharmacology; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D013268:Stimulation, Chemical
chemical_list: D004921:Erythropoietin