title: Selective expression of class-II MHC antigens during hemopoietic differentiation.
abstract: Human multipotential or "mixed" bone marrow colony-forming cells and lineage-restricted colony-forming progenitors have been analyzed by cell sorting (FACS) using a series of monoclonal antibodies. The latter all react with monomorphic class-II MHC glycoprotein determinants but differ in their reactivity or cross-reactivity with products of different loci, i.e., SB (DP), DC (DQ), DR. The results confirm that very few progenitor cells detectably express DC. Anti-DR monoclonals varied in their reactivity with progenitor cells. The majority of progenitors in all lineage categories express determinants that are shared or cross-reactive between DR and SB while fewer progenitors can be shown to bind antibodies specific for DR or SB.
mesh_terms: D000911:Antibodies, Monoclonal; D001853:Bone Marrow / Q000276:immunology; D001854:Bone Marrow Cells; D002454:Cell Differentiation; D002469:Cell Separation; D005434:Flow Cytometry; D006682:HLA-DP Antigens; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D006410:Hematopoiesis; D006412:Hematopoietic Stem Cells / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D006801:Humans
chemical_list: D000911:Antibodies, Monoclonal; D006682:HLA-DP Antigens; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II