title: Erythropoietin-stimulated erythropoiesis in long-term bone marrow culture.
abstract: The proliferation of multipotential haematopoietic stem cells (CFU-S) is possible in some long-term bone marrow cultures. Granulocyte and macrophage progenitor (CFU-C) and megakaryocyte precursor cells (CFU-M) are present in these cultures and undergo full development into mature cells. In contrast, while immature erythroid progenitors ('early' BFU-E) are maintained in long-term culture, none of the more differentiated progeny (CFU-E) have been detected, and no morphologically recognisable erythroid cells have been observed. We now describe a modified culture system in which the 'early' BFU-E develop into 'late' BFU-E in response to added erythropoietin. Further maturation of these cells into CFU-E and non-nucleated erythrocytes can be achieved by mechanical agitation of the long-term cultures or by transferring the cells into dishes which do not allow cell attachment to occur.
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000502:physiology*; D001854:Bone Marrow Cells; D002448:Cell Adhesion; D002478:Cells, Cultured; D004920:Erythropoiesis / Q000187:drug effects; D004921:Erythropoietin / Q000494:pharmacology*; D051379:Mice; D013997:Time Factors
chemical_list: D004921:Erythropoietin