Abstract
Replication of multipotential stem cells in long-term murine bone marrow cell culture is known to depend on the development of an adherent stromal cell layer. In these conditions, restricted haematopoietic progenitor cells have also been generated for up to several months1–3. However, maturation is observed only in the granulocyte/macrophage and megakaryocyte lineages; erythropoiesis appears to be blocked at the earliest burst-forming unit (BFU-E) stage. Addition of exogenous erythropoietin (Epo) or anaemic mouse serum results in full erythropoietic maturation, but it is transient4,5. We describe here a culture system in which production of erythropoietic progenitor cells can be maintained for over 6 months in the absence of an adherent stromal layer and in the absence of added Epo, but in the presence of pokeweed mitogen-stimulated spleen cell conditioned medium (PWSCM). The data indicate that restricted erythroid progenitor cells exist which are capable of extensive self-renewal.
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Wendling, F., Shreeve, M., McLeod, D. et al. Long-term culture of murine erythropoietic progenitor cells in the absence of an adherent layer. Nature 305, 625–627 (1983). https://doi.org/10.1038/305625a0
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DOI: https://doi.org/10.1038/305625a0
