title: Differentiation-inducing factor for a human leukemic cell line produced by colony-stimulating factor producing human lung cancer tissue.
abstract: We have found that medium conditioned by a colony-stimulating factor producing tumor derived from a granulocytosis case with lung cancer contained a factor to differentiate a human promyelocytic leukemic cell line (HL-60) to macrophage-like cells that were butyrate esterase-positive and had phagocytosing activity and membrane Fc receptors. This differentiation-inducing factor was not active for a human myeloblastic cell line (KG-1), and was separated from a colony-stimulating factor by its molecular weight and isoelectric point. The conditioned medium did not contain a detectable amount of gamma interferon when tested by bioassay as well as by radioimmunoassay. This is the first report that a human lung cancer tissue produces not only a colony-stimulating factor, but also a differentiation-inducing factor. The conditioned medium is considered to be a good source of differentiation-inducing factor.
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects*; D003470:Culture Media / Q000032:analysis; D006098:Granulocytes / Q000187:drug effects / Q000473:pathology; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000473:pathology*; D007964:Leukocytosis / Q000209:etiology; D008175:Lung Neoplasms / Q000150:complications / Q000378:metabolism* / Q000473:pathology; D008222:Lymphokines / Q000302:isolation & purification* / Q000378:metabolism / Q000494:pharmacology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009368:Neoplasm Transplantation; D014407:Tumor Cells, Cultured / Q000187:drug effects*; D014410:Tumor Stem Cell Assay
chemical_list: D003470:Culture Media; D008222:Lymphokines; C050979:monocyte-macrophage differentiation factor