title: Effects of mast cell growth factor, interleukin-3, and interleukin-6 on human primitive hematopoietic progenitors from bone marrow and cord blood.
abstract: Phycoerythrin (PE)-labeled murine monoclonal antibodies (MAB) to CD2, CD10, CD19, CD20, and CD33 were used as lineage markers, as were PE-labeled anti-DR MAB and fluorescein isothiocyanate (FITC)-conjugated MAB to CD34. One hundred CD34+Lin+DR+ or CD34+Lin-DR- cells were individually sorted and incubated without adherent cell layer in alpha-medium with or without cytokines such as 100 U/mL recombinant human interleukin-3 (rhIL-3), 100 U/mL rhIL-6, and/or 500 ng/mL mast cell growth factor (MGF). The incubated cells were harvested and cultured in medium containing methylcellulose every 2 weeks. The numbers of colonies from colony-forming units-granulocyte/macrophage (CFU-GM), burst-forming units-erythroid (BFU-E), and mixed colony-forming units (CFU-Mix) were scored on day 14. In the incubation, CD34+Lin-DR- cells from bone marrow and cord blood produced more CFU-GM and BFU-E, and for longer periods, than did CD34+Lin+DR+ cells. In addition, CD34+Lin-DR- from cord blood supplied more CFU-GM and BFU-E than did CD34+Lin-DR- from bone marrow. Although these data demonstrate that MGF, IL-3, and IL-6 synergistically stimulate the production of CFU-GM and BFU-E, this study indicates that CD34+Lin-DR- cells contain more primitive hematopoietic progenitors and that CD34+Lin-DR- cells are unable to maintain their self-renewal capacity in the presence of IL-3, IL-6, and MGF without adherent cell layer.
authors.affiliation: Department of Pediatrics, Hyogo College of Medicine, Nishinomiya, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Tsujino
authors.forename: H
authors.initials: H
authors.lastname: Wada
authors.forename: M
authors.initials: M
authors.lastname: Misawa
authors.forename: S
authors.initials: S
authors.lastname: Kai
authors.forename: H
authors.initials: H
authors.lastname: Hara
mesh_terms: D000328:Adult; D000818:Animals; D000911:Antibodies, Monoclonal; D015703:Antigens, CD / Q000032:analysis / Q000276:immunology; D018952:Antigens, CD34; D001854:Bone Marrow Cells; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D005312:Fetal Blood / Q000166:cytology*; D016650:Fluorescein-5-isothiocyanate; D005456:Fluorescent Dyes; D016298:Hematopoietic Cell Growth Factors / Q000008:administration & dosage / Q000494:pharmacology*; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D006801:Humans; D007377:Interleukin-3 / Q000494:pharmacology*; D015850:Interleukin-6 / Q000494:pharmacology*; D051379:Mice; D010799:Phycoerythrin; D011994:Recombinant Proteins / Q000494:pharmacology; D019089:Stem Cell Factor
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D018952:Antigens, CD34; D005456:Fluorescent Dyes; D016298:Hematopoietic Cell Growth Factors; D007377:Interleukin-3; D015850:Interleukin-6; D011994:Recombinant Proteins; D019089:Stem Cell Factor; D010799:Phycoerythrin; D016650:Fluorescein-5-isothiocyanate