Abstract
Two types of progenitor cells of the human granulocytic and monocytic lineages (CFU-GM) can be distinguished by using mouse monoclonal antibodies against human hemopoietic cells. Type 1 CFU-GM contribute all of the peripheral blood CFU-GM as well as a small fraction of bone marrow CFU-GM and express surface antigens recognized by "anti-lymphomonocytic" monoclonal antibodies S3-13 and S17-25 but not the antigens recognized by R1B19 and WGHS-29-1 (two monoclonal antibodies that react with all the cells of the granulocytic lineage). Type 2 CFU-GM are present only in the marrow and react with S3-13, R1B19, and WGHS-29-1. Partial reactivity with S17-25 was observed only in the complement-dependent cytotoxicity test. In vitro culture of type 1 CFU-GM in liquid medium in the presence of granulocyte-macrophage colony-stimulatory factor (GM-CSF) generates colony-forming cells that have the surface phenotype of type 2 CFU-GM. This finding supports the idea of two different stages of maturation of myelomonocytic progenitor cells represented by type 1 and type 2 CFU-GM.
MeSH Terms
Adult
Antibodies, Monoclonal
Antigens, Surface/analysis
Bone Marrow/immunology
Cell Separation
Complement System Proteins/immunology
Cytotoxicity, Immunologic
Epitopes/analysis
Flow Cytometry
Hematopoietic Stem Cells/immunology
Humans
Leukocytes/immunology
Phenotype
T-Lymphocytes/immunology
Chemicals
Antibodies, Monoclonal
Antigens, Surface
Epitopes
Complement System Proteins
Authors & Affiliations
7 authors, click to expand affiliations / ORCID
Ferrero D
Broxmeyer H E
Pagliardi G L
Venuta S
Lange B
Pessano S
Rovera G
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