title: Characterization of the human burst-forming unit-megakaryocyte.
abstract: Two classes of human marrow megakaryocyte progenitor cells are described. Colony-forming unit-megakaryocyte (CFU-MK)-derived colonies appeared in vitro after 12-day incubation; burst-forming unit-megakaryocyte (BFU-MK)-derived colonies appeared after 21 days. CFU-MK-derived colonies were primarily unifocal and composed of 11.6 +/- 1.2 cells/colony; BFU-MK-derived colonies were composed of 2.3 +/- 0.4 foci and 108.6 +/- 4.4 cells/colony. CFU-MK and BFU-MK were separable by counterflow centrifugal elutriation. CFU-MK colony formation was diminished by exposure to 5-fluorouracil (5-FU); BFU-MK colony formation was unaffected. CFU-MK and BFU-MK were immunologically phenotyped. CFU-MK expressed the human progenitor cell antigen-1 (HPCA-1, CD34, clone My10) and a major histocompatibility class II locus, HLA-DR, and BFU-MK expressed only detectable amounts of CD34. BFU-MK colony formation was entirely dependent on addition of exogenous hematopoietic growth factors. Recombinant granulocyte macrophage colony-stimulating factor (GM-CSF) and interleukin-3 (IL-3) possessed such colony-stimulating activity, whereas recombinant erythropoietin (Epo), G-CSF, IL-1 alpha, IL-4, and purified thrombocytopoiesis-stimulating factor did not. These studies indicate the existence of a human megakaryocyte progenitor cell, the BFU-MK, which has unique properties allowing it to be distinguished from the CFU-MK.
authors: Indiana University School of Medicine, Department of Medicine, Indianapolis 46223.
authors: R A
authors: RA
authors: Briddell
authors: J E
authors: JE
authors: Brandt
authors: J E
authors: JE
authors: Straneva
authors: E F
authors: EF
authors: Srour
authors: R
authors: R
authors: Hoffman
mesh_terms: D018952:Antigens, CD34; D000943:Antigens, Differentiation / Q000032:analysis; D001853:Bone Marrow / Q000276:immunology; D001854:Bone Marrow Cells; D002469:Cell Separation; D002478:Cells, Cultured; D003115:Colony-Stimulating Factors / Q000494:pharmacology; D005472:Fluorouracil / Q000494:pharmacology; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D006133:Growth Substances / Q000494:pharmacology; D006684:HLA-DR Antigens / Q000032:analysis; D006410:Hematopoiesis / Q000187:drug effects; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D006801:Humans; D066298:In Vitro Techniques; D007377:Interleukin-3 / Q000494:pharmacology; D008533:Megakaryocytes / Q000166:cytology*; D011994:Recombinant Proteins
chemical_list: D018952:Antigens, CD34; D000943:Antigens, Differentiation; D003115:Colony-Stimulating Factors; D006133:Growth Substances; D006684:HLA-DR Antigens; D007377:Interleukin-3; D011994:Recombinant Proteins; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D005472:Fluorouracil