title: Production of macrophage colony-stimulating factor by human lymphoblastoid cell lines.
abstract: The in vitro production of macrophage colony-stimulating factor (M-CSF) was studied in 14 human lymphoblastoid cell lines and their lineages were ascertained by surface phenotype analysis. M-CSF gene transcripts were detected in a T-lymphocyte-derived cell line (CCRF-CEM) and 3 B-lymphoblastoid cell lines (IM-9, BALL-1, and CCRF-SB) by Northern-blot analysis. The secretion of M-CSF protein into the culture supernatant by each cell line was also studied using an enzyme-linked immunosorbent assay for M-CSF. The 4 cell lines which expressed the M-CSF gene secreted considerable amounts of M-CSF into their culture supernatants, while the 10 cell lines without M-CSF gene expression did not do so. The cell lines which constitutively produced M-CSF were then subjected to Southern-blot analysis of the M-CSF gene structure, and all 14 cell lines were examined for infection by the Epstein-Barr virus. Neither structural changes nor amplification of the M-CSF gene were detected, and Epstein-Barr virus infection was found to be not directly related to M-CSF production.
authors.affiliation: First Department of Internal Medicine, Kyushu University, Fukuoka, Japan.
authors.forename: C
authors.initials: C
authors.lastname: Kawasaki
authors.forename: S
authors.initials: S
authors.lastname: Okamura
authors.forename: S
authors.initials: S
authors.lastname: Kondo
authors.forename: M
authors.initials: M
authors.lastname: Yamada
authors.forename: Y
authors.initials: Y
authors.lastname: Niho
mesh_terms: D015703:Antigens, CD / Q000096:biosynthesis; D001402:B-Lymphocytes / Q000378:metabolism; D015152:Blotting, Northern; D015139:Blotting, Southern; D002460:Cell Line; D004797:Enzyme-Linked Immunosorbent Assay; D005434:Flow Cytometry; D006684:HLA-DR Antigens / Q000096:biosynthesis; D004854:Herpesvirus 4, Human / Q000235:genetics; D006801:Humans; D016130:Immunophenotyping; D008214:Lymphocytes / Q000378:metabolism* / Q000382:microbiology; D016173:Macrophage Colony-Stimulating Factor / Q000096:biosynthesis* / Q000235:genetics; D012313:RNA / Q000032:analysis; D016186:Receptor, Macrophage Colony-Stimulating Factor / Q000096:biosynthesis; D013601:T-Lymphocytes / Q000378:metabolism
chemical_list: D015703:Antigens, CD; D006684:HLA-DR Antigens; D012313:RNA; D016173:Macrophage Colony-Stimulating Factor; D016186:Receptor, Macrophage Colony-Stimulating Factor