title: Further investigations on the expression of HLA-DR, CD33 and CD13 surface antigens in purified bone marrow and peripheral blood CD34+ haematopoietic progenitor cells.
abstract: We evaluated the HLA-DR, CD33 and CD13 antigen expression on CD34+ haematopoietic progenitor cells (HPC) isolated from the bone marrow (BM) and peripheral blood (PB) of normal donors. The majority of both BM and PB CD34+ HPC expressed CD13 and HLA-DR. The coexpression of CD34 and CD33 was found in a minor CD34+ subset. After 7 d of culture in the presence of interleukin-3 and granulocyte-macrophage colony-stimulating factor, CD33 expression was detected in about 50% of HPC. At this point CD34 antigen expression was lost and CD13 and HLA-DR expression was partially lost. After 14 d of culture, the majority of HPC were CD33+. HPC maintained the capacity to generate colony forming unit granulocyte-macrophage but they lost the capacity to generate burst forming unit-erythroid. A correlation was found between the percentage of CD34+/HLA-DR+ cells and the total number of colony forming cells in unfractionated samples from BM and PB of patients with malignancies. These studies demonstrate that, in normal conditions, only a minor subset of CD34+ cells coexpress CD33 antigen either in BM or in PB and CD33 antigen is a lineage marker which is coexpressed with HLA-DR and CD13 on a progenitor committed to the granulocytic-macrophagic lineage.
authors.affiliation: Servizio di Ematologia ed Emotransfusione, Catholic University, Rome.
authors.forename: L
authors.initials: L
authors.lastname: Pierelli
authors.forename: L
authors.initials: L
authors.lastname: Teofili
authors.forename: G
authors.initials: G
authors.lastname: Menichella
authors.forename: C
authors.initials: C
authors.lastname: Rumi
authors.forename: A
authors.initials: A
authors.lastname: Paoloni
authors.forename: S
authors.initials: S
authors.lastname: Iovino
authors.forename: P L
authors.initials: PL
authors.lastname: Puggioni
authors.forename: G
authors.initials: G
authors.lastname: Leone
authors.forename: B
authors.initials: B
authors.lastname: Bizzi
mesh_terms: D015703:Antigens, CD / Q000032:analysis*; D018952:Antigens, CD34; D015214:Antigens, Differentiation, Myelomonocytic / Q000032:analysis*; D000951:Antigens, Neoplasm / Q000032:analysis; D001853:Bone Marrow / Q000276:immunology; D018826:CD13 Antigens; D002454:Cell Differentiation / Q000276:immunology; D002455:Cell Division / Q000276:immunology; D002478:Cells, Cultured; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000276:immunology; D006684:HLA-DR Antigens / Q000032:analysis*; D006412:Hematopoietic Stem Cells / Q000276:immunology*; D006801:Humans; D007377:Interleukin-3 / Q000276:immunology; D063268:Sialic Acid Binding Ig-like Lectin 3
chemical_list: D015703:Antigens, CD; D018952:Antigens, CD34; D015214:Antigens, Differentiation, Myelomonocytic; D000951:Antigens, Neoplasm; C571163:CD33 protein, human; D006684:HLA-DR Antigens; D007377:Interleukin-3; D063268:Sialic Acid Binding Ig-like Lectin 3; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D018826:CD13 Antigens