title: Expression of stromal cell-derived factor-1/pre-B cell growth-stimulating factor receptor, CXC chemokine receptor 4, on CD34+ human bone marrow cells is a phenotypic alteration for committed lymphoid progenitors.
abstract: We found that the stromal cell-derived factor-1/pre-B cell growth-stimulating factor receptor, CXC chemokine receptor 4 (CXCR4), is expressed on human CD34+ bone marrow (BM) cells. Stringently FACS-sorted CD34+CXCR4+ BM cells completely lack myeloid, erythroid, megakaryocytic, and mixed colony-forming potential (myeloid progenitors), but give rise to B and T lymphoid progenitors, whereas CD34+CXCR4- BM cells can generate colonies formed by myeloid progenitors and can also develop into these lymphoid progenitors. Therefore, expression of CXCR4 on CD34+ BM cells can allow lymphoid progenitors to be discriminated from myeloid progenitors. Because CD34+CXCR4+ cells are differentiated from CD34+CXCR4- cells, multipotential progenitors located in the BM are likely to be negative for CXCR4 expression. CXCR4 seems to be expressed earlier than the IL-7R and terminal deoxynucleotidyl transferase during early lymphohemopoiesis. These results suggest that the expression of CXCR4 on CD34+ BM cells is one of the phenotypic alterations for committed lymphoid progenitors.
authors.affiliation: Department of Transfusion Medicine, The Institute of Medical Science, University of Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ishii
authors.forename: M
authors.initials: M
authors.lastname: Nishihara
authors.forename: F
authors.initials: F
authors.lastname: Ma
authors.forename: Y
authors.initials: Y
authors.lastname: Ebihara
authors.forename: K
authors.initials: K
authors.lastname: Tsuji
authors.forename: S
authors.initials: S
authors.lastname: Asano
authors.forename: T
authors.initials: T
authors.lastname: Nakahata
authors.forename: T
authors.initials: T
authors.lastname: Maekawa
mesh_terms: D000328:Adult; D000818:Animals; D018952:Antigens, CD34 / Q000032:analysis / Q000096:biosynthesis; D001402:B-Lymphocytes / Q000276:immunology / Q000378:metabolism*; D001854:Bone Marrow Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism*; D002454:Cell Differentiation / Q000276:immunology; D002469:Cell Separation; D002478:Cells, Cultured; D054377:Chemokine CXCL12; D019743:Chemokines, CXC / Q000096:biosynthesis*; D003114:Colony-Forming Units Assay; D005333:Fetus; D005434:Flow Cytometry; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism*; D006801:Humans; D016130:Immunophenotyping; D008221:Lymphoid Tissue / Q000166:cytology* / Q000276:immunology* / Q000378:metabolism; D051379:Mice; D009924:Organ Culture Techniques; D019718:Receptors, CXCR4 / Q000032:analysis / Q000096:biosynthesis*; D017154:Stromal Cells / Q000378:metabolism; D013601:T-Lymphocytes / Q000166:cytology; D013950:Thymus Gland / Q000166:cytology / Q000276:immunology
chemical_list: D018952:Antigens, CD34; C515255:CXCL12 protein, human; D054377:Chemokine CXCL12; D019743:Chemokines, CXC; C515256:Cxcl12 protein, mouse; D019718:Receptors, CXCR4