title: Purification and characterization of human fibroblast derived differentiation inducing factor for human monoblastic leukemia cells identical to interleukin-6.
abstract: A differentiation inducing factor for human monocytic leukemia cells was purified to homogeneity from conditioned medium of WI-26VA4, a human fibroblast cell line. The purification scheme consisted of micro bead silica gel chromatography, hydroxyapatite chromatography, gel filtration chromatography, chromatofocusing and reverse phase high performance liquid chromatography. The purified protein was almost homogeneous when determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and N-terminal sequence analysis. The protein has a molecular weight of approximately 27,000 and an isoelectric point of 5.4. The sequence of the first 13 N-terminal amino acid residues was consistent with that of B-cell stimulatory factor 2 (interleukin-6) except for the absence of the N-terminal proline. The purified factor induced differentiation of human monocytic leukemia U-937 cells into a monocyte/macrophage pathway.
authors.affiliation: Central Research Laboratory, Green Cross Corporation, Osaka, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Noda
authors.forename: K
authors.initials: K
authors.lastname: Takeda
authors.forename: H
authors.initials: H
authors.lastname: Sugimoto
authors.forename: T
authors.initials: T
authors.lastname: Hosoi
authors.forename: K
authors.initials: K
authors.lastname: Takechi
authors.forename: T
authors.initials: T
authors.lastname: Hara
authors.forename: H
authors.initials: H
authors.lastname: Ishikawa
authors.forename: H
authors.initials: H
authors.lastname: Arimura
authors.forename: K
authors.initials: K
authors.lastname: Konno
mesh_terms: D000595:Amino Acid Sequence; D002454:Cell Differentiation / Q000187:drug effects*; D002460:Cell Line; D002845:Chromatography; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D017886:Durapatite; D004591:Electrophoresis, Polyacrylamide Gel; D006801:Humans; D006882:Hydroxyapatites; D015850:Interleukin-6 / Q000302:isolation & purification* / Q000494:pharmacology; D007525:Isoelectric Focusing; D007938:Leukemia; D016403:Lymphoma, Large B-Cell, Diffuse; D008969:Molecular Sequence Data; D008970:Molecular Weight; D010587:Phagocytosis / Q000187:drug effects
chemical_list: D006882:Hydroxyapatites; D015850:Interleukin-6; D017886:Durapatite