title: Formation of haematopoietic microenvironment and haematopoietic stem cells from single human bone marrow stem cells.
abstract: Haematopoietic stem cells are a population of cells capable both of self renewal and of differentiation into a variety of haematopoietic lineages. Enrichment techniques of human haematopoietic stem cells have used the expression of CD34, present on bone marrow progenitor cells. But most CD34+ bone marrow cells are committed to their lineage, and more recent efforts have focused on the precise characterization of the pluripotent subset of CD34+ cells. Here we report the characterization of two distinct subsets of pluripotent stem cells from human fetal bone marrow, a CD34+, HLA-DR+, CD38- subset that can differentiate into all haematopoietic lineages, and a distinct more primitive subset, that is CD34+, HLA-DR-, CD38-, that can differentiate into haematopoietic precursors and stromal cells capable of supporting the differentiation of these precursors. These data represent, to our knowledge, the first identification of a single cell capable of reconstituting the haematopoietic cells and their associated bone marrow microenvironment.
mesh_terms: D036541:ADP-ribosyl Cyclase; D051997:ADP-ribosyl Cyclase 1; D015703:Antigens, CD / Q000032:analysis; D018952:Antigens, CD34; D000943:Antigens, Differentiation / Q000032:analysis; D001769:Blood; D001853:Bone Marrow / Q000196:embryology; D001854:Bone Marrow Cells; D002454:Cell Differentiation; D002469:Cell Separation; D004921:Erythropoietin / Q000494:pharmacology; D016222:Fibroblast Growth Factor 2 / Q000494:pharmacology; D005434:Flow Cytometry; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology; D006684:HLA-DR Antigens / Q000032:analysis; D006410:Hematopoiesis; D016298:Hematopoietic Cell Growth Factors / Q000494:pharmacology; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000276:immunology; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000494:pharmacology; D007377:Interleukin-3 / Q000494:pharmacology; D015850:Interleukin-6 / Q000494:pharmacology; D008562:Membrane Glycoproteins; D019089:Stem Cell Factor
chemical_list: D015703:Antigens, CD; D018952:Antigens, CD34; D000943:Antigens, Differentiation; D006684:HLA-DR Antigens; D016298:Hematopoietic Cell Growth Factors; D007377:Interleukin-3; D015850:Interleukin-6; D008562:Membrane Glycoproteins; D019089:Stem Cell Factor; D016222:Fibroblast Growth Factor 2; D004921:Erythropoietin; D007334:Insulin-Like Growth Factor I; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D036541:ADP-ribosyl Cyclase; C498154:CD38 protein, human; D051997:ADP-ribosyl Cyclase 1