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- W2111718042 abstract "Erythroid colony formation in agar cultures of CBA bone marrow cells was stimulated by the addition of pokeweed mitogen-stimulated spleen conditioned medium (SCM). Optimal colony numbers were obtained when cultures contained 20% fetal calf serum and concentrated spleen conditioned medium. By 7 days of incubation, large burst or unicentric erythroid colonies occurred at a maximum frequency of 40–50 per 105 bone marrow cells. In CBA mice the cells forming erythroid colonies were also present in the spleen, peripheral blood, and within individual spleen colonies. A marked strain variation was noted with CBA mice having the highest levels of erythroid colony-forming cells. In CBA mice erythroid colony-forming cells were mainly non-cycling (12.5% reduction in colony numbers after incubation with hydroxyurea or 3H-thymidine). Erythroid colony-forming cells sedimented with a peak of 4.5 mm/hr, compared with CFU-S, which sedimented at 4.25 mm/hr. The addition of erythropoietin (up to 4 units) to cultures containing SCM did not alter the number or degree of hemoglobinisation of erythroid colonies. Analysis of the total number of erythroid colony-forming cells and CFU-S in 90 individual spleen colonies gave a correlation coefficient of r = 0.93 for these two cell types. In addition to benzidine-positive erythroid cells, up to 40% of the colonies contained, in addition, varying proportions of neutrophils, macrophages, eosinophils, and megakaryocytes. Taken together with the close correlation between the numbers of CFU-S in different adult hemopoietic tissues, including individual spleen colonies, the data indicate that the erythroid colony-forming cells expressing multiple hemopoietic differentiation are members of the hemopoietic multipotential stem cell compartment." @default.
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- W2111718042 date "1980-06-01" @default.
- W2111718042 modified "2023-09-24" @default.
- W2111718042 title "Colony formation in agar by adult bone marrow multipotential hemopoietic cells" @default.
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- W2111718042 doi "https://doi.org/10.1002/jcp.1041030302" @default.
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