title: Interaction of human herpesvirus 6 with human CD34 positive cells.
abstract: We reported previously that human herpesvirus 6 (HHV-6) suppresses hematopoietic colony formation of erythroid (BFU-E), granulocyte/macrophage (CFU-GM), and megakaryocyte (CFU-Meg) lineages in vitro. Here we describe the interaction between HHV-6 and human CD34+ cells, which are a major source of hematopoietic progenitor cells. CD34+ cells were immunomagnetically isolated from cord blood mononuclear cells using anti-CD34+ antibodies coated onto either Dynabeads trade mark or MACS beads. The CD34+ population selected with Dynabeads showed a broad range of fluorescence. The population selected with MACS beads showed a narrow range of fluorescence. After infection with HHV-6, two transcripts of the immediate early genes were detected with both cell populations. HHV-6 suppressed colony formation of BFU-E, CFU-GM, and CFU-Meg. HHV-6 suppressed cell growth after 3 to 7 days culture in the presence of thrombopoietin (TPO). More differentiated CD34+ cells were more susceptible to the effects of HHV-6. These data indicate that the targets for hematopoietic suppression by HHV-6 are the differentiated cells.
authors.affiliation: Department of Virology, Okayama University Medical School, Okayama, Japan. hiroki-isomura@uiowa.edu
authors.forename: Hiroki
authors.initials: H
authors.lastname: Isomura
authors.forename: Mariko
authors.initials: M
authors.lastname: Yoshida
authors.forename: Hikaru
authors.initials: H
authors.lastname: Namba
authors.forename: Masao
authors.initials: M
authors.lastname: Yamada
mesh_terms: D018952:Antigens, CD34 / Q000032:analysis; D002478:Cells, Cultured; D003114:Colony-Forming Units Assay; D015672:Erythroid Precursor Cells / Q000166:cytology; D005312:Fetal Blood / Q000276:immunology; D006098:Granulocytes / Q000166:cytology; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000276:immunology / Q000821:virology*; D015654:Herpesvirus 6, Human / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology*; D006801:Humans; D008264:Macrophages / Q000166:cytology; D008533:Megakaryocytes / Q000166:cytology; D012333:RNA, Messenger / Q000032:analysis; D012367:RNA, Viral / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D018952:Antigens, CD34; D012333:RNA, Messenger; D012367:RNA, Viral