title: Tumor necrosis factor changes sensitivity of differentiation of mouse leukemia M1 cells by lipopolysaccharide.
abstract: A clone of mouse leukemia M1 cells was induced to differentiate by lipopolysaccharide (LPS) (LPS-sensitive clone) while another clone of the same cells was resistant (LPS-resistant clone). LPS and lipid A preparations from Pseudomonas diminuta and Pseudomonas vesicularis were as active as Escherichia coli LPS in the induction of differentiation of the LPS-sensitive clone. Synthetic lipid A precursor Ia (compound 406), which has no interleukin 1 (IL-1)-inducing activity toward monocytes, had strong differentiation-inducing activity toward the LPS-sensitive clone. The combined treatment of the LPS-sensitive clone with LPS and recombinant tumor necrosis factor (rTNF) did not further increase the degree of differentiation induced by LPS alone. By contrast, the LPS-resistant clone was markedly induced to differentiate by LPS in the presence of rTNF. Combined treatment of the LPS-resistant clone with LPS and other cytokines such as recombinant IL-1 alpha, recombinant granulocyte colony-stimulating factor, and interferon-gamma was not effective in inducing marked synergistic differentiation. These results raise the possibility that rTNF changes the sensitivity of M1 cells to induction of differentiation by LPS.
authors.affiliation: Laboratory of Biological, School of Pharmaceutical Sciences, Showa University, Tokyo.
authors.forename: K
authors.initials: K
authors.lastname: Nakaya
authors.forename: Y
authors.initials: Y
authors.lastname: Deguchi
authors.forename: S
authors.initials: S
authors.lastname: Arata
authors.forename: N
authors.initials: N
authors.lastname: Kasai
authors.forename: Y
authors.initials: Y
authors.lastname: Nakamura
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects*; D002999:Clone Cells / Q000502:physiology / Q000648:ultrastructure; D004351:Drug Resistance; D004357:Drug Synergism; D006801:Humans; D007951:Leukemia, Myeloid / Q000473:pathology* / Q000503:physiopathology; D008050:Lipid A / Q000494:pharmacology; D008070:Lipopolysaccharides / Q000494:pharmacology; D051379:Mice; D011956:Receptors, Cell Surface / Q000378:metabolism; D018124:Receptors, Tumor Necrosis Factor; D013329:Structure-Activity Relationship; D014407:Tumor Cells, Cultured; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis / Q000494:pharmacology*
chemical_list: D008050:Lipid A; D008070:Lipopolysaccharides; D011956:Receptors, Cell Surface; D018124:Receptors, Tumor Necrosis Factor; D014409:Tumor Necrosis Factor-alpha