title: Receptor subunit-specific action of oncostatin M in hepatic cells and its modulation by leukemia inhibitory factor.
abstract: The related cytokines, interleukin-6 (IL-6), oncostatin M (OSM), and leukemia inhibitory factor (LIF) direct the formation of specific heteromeric receptor complexes to achieve signaling. Each complex includes the common signal-transducing subunit gp130. OSM and LIF also recruit the signaling competent, but structurally distinct OSMRbeta and LIFRalpha subunits, respectively. To test the hypothesis that the particularly prominent cell regulation by OSM is due to signals contributed by OSMRbeta, we introduced stable expression of human or mouse OSMRbeta in rat hepatoma cells which have endogenous receptors for IL-6 and LIF, but not OSM. Both mouse and human OSM engaged gp130 with their respective OSMRbeta subunits, but only human OSM also acted through LIFR. Signaling by OSMRbeta-containing receptors was characterized by highest activation of STAT5 and ERK, recruitment of the insulin receptor substrate and Jun-N-terminal kinase pathways, and induction of a characteristic pattern of acute phase proteins. Since LIF together with LIFRalpha appear to form a more stable complex with gp130 than OSM with gp130 and OSMRbeta, co-activation of LIFR and OSMR resulted in a predominant LIF-like response. These results suggest that signaling by IL-6 cytokines is not identical, and that a hierarchical order of cytokine receptor action exists in which LIFR ranks as dominant member.
authors.affiliation: Roswell Park Cancer Institute, Department of Molecular and Cellular Biology, Buffalo, NY 14263, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: O
authors.initials: O
authors.lastname: Robledo
authors.forename: E
authors.initials: E
authors.lastname: Kinzie
authors.forename: F
authors.initials: F
authors.lastname: Blanchard
authors.forename: C
authors.initials: C
authors.lastname: Richards
authors.forename: A
authors.initials: A
authors.lastname: Miyajima
authors.forename: H
authors.initials: H
authors.lastname: Baumann
mesh_terms: D000209:Acute-Phase Proteins / Q000378:metabolism; D048868:Adaptor Proteins, Signal Transducing; D033942:Adaptor Proteins, Vesicular Transport; D000818:Animals; D015703:Antigens, CD / Q000378:metabolism; D015152:Blotting, Northern; D015153:Blotting, Western; D050822:Cytokine Receptor gp130; D018076:DNA, Complementary / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004591:Electrophoresis, Polyacrylamide Gel; D006131:Growth Inhibitors / Q000378:metabolism*; D006801:Humans; D015850:Interleukin-6 / Q000378:metabolism; D047908:Intracellular Signaling Peptides and Proteins; D048031:JNK Mitogen-Activated Protein Kinases; D053605:Leukemia Inhibitory Factor; D053680:Leukemia Inhibitory Factor Receptor alpha Subunit; D008222:Lymphokines; D008562:Membrane Glycoproteins / Q000378:metabolism; D051379:Mice; D008894:Milk Proteins; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D010957:Plasmids / Q000378:metabolism; D011233:Precipitin Tests; D011485:Protein Binding; D054592:Protein Tyrosine Phosphatase, Non-Receptor Type 11; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D017027:Protein Tyrosine Phosphatases / Q000378:metabolism; D011506:Proteins / Q000378:metabolism; D051381:Rats; D018121:Receptors, Cytokine / Q000378:metabolism*; D053606:Receptors, OSM-LIF; D053677:Receptors, Oncostatin M; D050799:STAT5 Transcription Factor; D055765:Shc Signaling Adaptor Proteins; D015398:Signal Transduction; D000071425:Src Homology 2 Domain-Containing, Transforming Protein 1; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors; D015534:Trans-Activators / Q000378:metabolism; D014161:Transduction, Genetic; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D000209:Acute-Phase Proteins; D048868:Adaptor Proteins, Signal Transducing; D033942:Adaptor Proteins, Vesicular Transport; D015703:Antigens, CD; D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D006131:Growth Inhibitors; C494199:IL6ST protein, human; C494200:Il6st protein, mouse; C494201:Il6st protein, rat; D015850:Interleukin-6; D047908:Intracellular Signaling Peptides and Proteins; C507837:LIF protein, human; C507840:LIFR protein, human; D053605:Leukemia Inhibitory Factor; D053680:Leukemia Inhibitory Factor Receptor alpha Subunit; C507838:Lif protein, mouse; C507841:Lifr protein, mouse; C507842:Lifr protein, rat; D008222:Lymphokines; D008562:Membrane Glycoproteins; D008894:Milk Proteins; D011506:Proteins; D018121:Receptors, Cytokine; D053606:Receptors, OSM-LIF; D053677:Receptors, Oncostatin M; C528024:SHC1 protein, human; D050799:STAT5 Transcription Factor; D055765:Shc Signaling Adaptor Proteins; C528034:Shc1 protein, mouse; C528035:Shc1 protein, rat; D000071425:Src Homology 2 Domain-Containing, Transforming Protein 1; D015534:Trans-Activators; D050822:Cytokine Receptor gp130; D048031:JNK Mitogen-Activated Protein Kinases; D020928:Mitogen-Activated Protein Kinases; C516724:PTPN11 protein, human; C509249:PTPN6 protein, human; D054592:Protein Tyrosine Phosphatase, Non-Receptor Type 11; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D017027:Protein Tyrosine Phosphatases; C516725:Ptpn11 protein, mouse; C516727:Ptpn11 protein, rat; C509248:Ptpn6 protein, mouse; C509250:Ptpn6 protein, rat; D013936:Thymidine