Erythroid development of the FDCP-Mix A4 multipotent cell line is governed by the relative concentrations of erythropoietin and interleukin 3.
AuthorsHeyworth, Clare M
Cross, Michael A
Fairbairn, Leslie J
Dexter, T Michael
Whetton, Anthony D
AffiliationCancer Research Campaign Department of Experimental Haematology, Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Manchester.
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AbstractConditions are described which promote the erythroid development of the FDCP-Mix A4 (A4) cell line with accompanying proliferation of the cells. The requirements for this development are low concentrations of interleukin 3 (IL-3) plus the presence of erythropoietin (epo) and haemin. When high concentrations of IL-3 are added with erythropoietin and haemin the cells do not differentiate and maintain their blast cell morphology. Addition of haemin, in the absence of erythropoietin, does not promote erythroid development, but the presence of haemin with erythropoietin promotes increased proliferation and maturation. The morphological maturation of A4 cells along the erythroid lineage is accompanied by a gradual loss of clonogenic potential, loss of A4 cell multipotency, increased erythropoietin receptor expression, and an increased expression of the beta-globin gene. An initial increase in mitogenic responsiveness to erythropoietin is followed by a decrease as the cells become refractory to all mitogenic stimuli with the acquisition of a postmitotic, mature erythroid cell phenotype.
CitationErythroid development of the FDCP-Mix A4 multipotent cell line is governed by the relative concentrations of erythropoietin and interleukin 3. 1995, 91 (1):15-22 Br. J. Haematol.
JournalBritish Journal of Haematology
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