title: Contrasting effect of IFN-gamma and IFN-alpha/beta on differentiation of some clones of mouse myeloid leukemic cells.
abstract: Mouse myeloid leukemic M1 cells are induced to differentiate into macrophage-like cells by a differentiation-inducing factor (D-factor) and various agents. IFN-gamma alone did not induce differentiation of clone T22-3 of M1 cells but inhibited their differentiation by D-factor. That is, IFN-gamma at 4 U/ml inhibited 50% of phagocytic activity of T22-3 cells induced by 7 x 10(-11) M D-factor. In addition, it inhibited the induction of lysozyme activity and morphological differentiation of these cells by D-factor. IFN-gamma also inhibited dexamethasone-induced differentiation of T22-3 cells. Previously interferon-alpha/beta was shown not to induce differentiation of M1 cells itself, but to enhance induction of their differentiation by D-factor. The present study showed that IFN-alpha/beta and IFN-gamma had opposite effects on induction of differentiation of T22-3 cells by D-factor. The effect of IFN-gamma on the differentiation of M1 cells varied with the clone of M1 cells used: IFN-gamma inhibited D-factor-induced differentiation of cells of clones T22-3 and S2, but induced differentiation of cells of clones B24 and S1.
authors.affiliation: Department of Chemotherapy, Saitama Cancer Center Research Institute, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto-Yamaguchi
authors.forename: M
authors.initials: M
authors.lastname: Tomida
authors.forename: M
authors.initials: M
authors.lastname: Hozumi
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects; D002999:Clone Cells; D006131:Growth Inhibitors; D007370:Interferon Type I / Q000494:pharmacology*; D007371:Interferon-gamma / Q000494:pharmacology*; D015850:Interleukin-6; D053605:Leukemia Inhibitory Factor; D007951:Leukemia, Myeloid / Q000473:pathology*; D008222:Lymphokines / Q000494:pharmacology; D051379:Mice; D010587:Phagocytosis / Q000187:drug effects; D011994:Recombinant Proteins
chemical_list: D006131:Growth Inhibitors; D007370:Interferon Type I; D015850:Interleukin-6; D053605:Leukemia Inhibitory Factor; C507838:Lif protein, mouse; D008222:Lymphokines; D011994:Recombinant Proteins; D007371:Interferon-gamma