Abstract
The promoter regions of three IL-6 inducible genes, hemopexin (Hpx), haptoglobin (Hp) and C-reactive protein (CRP) contain cis-acting IL-6 responsive elements (IL-6REs) which are necessary and sufficient to induce IL-6 transcription activation. Transcription factors of the C/EBP family interact with IL-6REs. Among these, IL-6DBP/NF-IL6 plays a key role in IL-6 signal transduction because its trans-activation potential is induced by IL-6 in the human hepatoma cell line Hep3B. We show here that a different C/EBP-related factor, C/EBP delta/NF-IL6 beta, is the major IL-6 induced protein interacting with IL-6REs in the nuclei of Hep3B cells. In contrast to IL-6DBP/NF-IL6, whose activity in Hep3B cells is modulated by IL-6 via a post-translational mechanism, C/EBP delta/NF-IL6 beta is transcriptionally induced by IL-6. Another contrasting feature is that the C/EBP delta cDNA transfected in Hep3B cells activates transcription from an IL-6RE synthetic promoter in a constitutive manner which is not further enhanced by IL-6. Therefore, in Hep3B cells, two distinct members of the C/EBP family are recruited in the IL-6 signal transduction pathway via different mechanisms.
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Selected References
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- Akira S., Isshiki H., Sugita T., Tanabe O., Kinoshita S., Nishio Y., Nakajima T., Hirano T., Kishimoto T. A nuclear factor for IL-6 expression (NF-IL6) is a member of a C/EBP family. EMBO J. 1990 Jun;9(6):1897–1906. doi: 10.1002/j.1460-2075.1990.tb08316.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Baumann H., Gauldie J. Regulation of hepatic acute phase plasma protein genes by hepatocyte stimulating factors and other mediators of inflammation. Mol Biol Med. 1990 Apr;7(2):147–159. [PubMed] [Google Scholar]
- Baumann H., Richards C., Gauldie J. Interaction among hepatocyte-stimulating factors, interleukin 1, and glucocorticoids for regulation of acute phase plasma proteins in human hepatoma (HepG2) cells. J Immunol. 1987 Dec 15;139(12):4122–4128. [PubMed] [Google Scholar]
- Baumann H., Wong G. G. Hepatocyte-stimulating factor III shares structural and functional identity with leukemia-inhibitory factor. J Immunol. 1989 Aug 15;143(4):1163–1167. [PubMed] [Google Scholar]
- Baumann H., Wong G. G. Hepatocyte-stimulating factor III shares structural and functional identity with leukemia-inhibitory factor. J Immunol. 1989 Aug 15;143(4):1163–1167. [PubMed] [Google Scholar]
- Brasier A. R., Ron D., Tate J. E., Habener J. F. A family of constitutive C/EBP-like DNA binding proteins attenuate the IL-1 alpha induced, NF kappa B mediated trans-activation of the angiotensinogen gene acute-phase response element. EMBO J. 1990 Dec;9(12):3933–3944. doi: 10.1002/j.1460-2075.1990.tb07614.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Brasier A. R., Ron D., Tate J. E., Habener J. F. A family of constitutive C/EBP-like DNA binding proteins attenuate the IL-1 alpha induced, NF kappa B mediated trans-activation of the angiotensinogen gene acute-phase response element. EMBO J. 1990 Dec;9(12):3933–3944. doi: 10.1002/j.1460-2075.1990.tb07614.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Cao Z., Umek R. M., McKnight S. L. Regulated expression of three C/EBP isoforms during adipose conversion of 3T3-L1 cells. Genes Dev. 1991 Sep;5(9):1538–1552. doi: 10.1101/gad.5.9.1538. [DOI] [PubMed] [Google Scholar]
- Chomczynski P., Sacchi N. Single-step method of RNA isolation by acid guanidinium thiocyanate-phenol-chloroform extraction. Anal Biochem. 1987 Apr;162(1):156–159. doi: 10.1006/abio.1987.9999. [DOI] [PubMed] [Google Scholar]
- Darlington G. J., Wilson D. R., Lachman L. B. Monocyte-conditioned medium, interleukin-1, and tumor necrosis factor stimulate the acute phase response in human hepatoma cells in vitro. J Cell Biol. 1986 Sep;103(3):787–793. doi: 10.1083/jcb.103.3.787. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Descombes P., Chojkier M., Lichtsteiner S., Falvey E., Schibler U. LAP, a novel member of the C/EBP gene family, encodes a liver-enriched transcriptional activator protein. Genes Dev. 1990 Sep;4(9):1541–1551. doi: 10.1101/gad.4.9.1541. [DOI] [PubMed] [Google Scholar]
- Gauldie J., Richards C., Harnish D., Lansdorp P., Baumann H. Interferon beta 2/B-cell stimulatory factor type 2 shares identity with monocyte-derived hepatocyte-stimulating factor and regulates the major acute phase protein response in liver cells. Proc Natl Acad Sci U S A. 1987 Oct;84(20):7251–7255. doi: 10.1073/pnas.84.20.7251. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gauldie J., Richards C., Harnish D., Lansdorp P., Baumann H. Interferon beta 2/B-cell stimulatory factor type 2 shares identity with monocyte-derived hepatocyte-stimulating factor and regulates the major acute phase protein response in liver cells. Proc Natl Acad Sci U S A. 1987 Oct;84(20):7251–7255. doi: 10.1073/pnas.84.20.7251. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gorman C. M., Merlino G. T., Willingham M. C., Pastan I., Howard B. H. The Rous sarcoma virus long terminal repeat is a strong promoter when introduced into a variety of eukaryotic cells by DNA-mediated transfection. Proc Natl Acad Sci U S A. 1982 Nov;79(22):6777–6781. doi: 10.1073/pnas.79.22.6777. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hibi M., Murakami M., Saito M., Hirano T., Taga T., Kishimoto T. Molecular cloning and expression of an IL-6 signal transducer, gp130. Cell. 1990 Dec 21;63(6):1149–1157. doi: 10.1016/0092-8674(90)90411-7. [DOI] [PubMed] [Google Scholar]
- Hirano T. Interleukin 6 (IL-6) and its receptor: their role in plasma cell neoplasias. Int J Cell Cloning. 1991 May;9(3):166–184. doi: 10.1002/stem.5530090303. [DOI] [PubMed] [Google Scholar]
- Isshiki H., Akira S., Sugita T., Nishio Y., Hashimoto S., Pawlowski T., Suematsu S., Kishimoto T. Reciprocal expression of NF-IL6 and C/EBP in hepatocytes: possible involvement of NF-IL6 in acute phase protein gene expression. New Biol. 1991 Jan;3(1):63–70. [PubMed] [Google Scholar]
- Kageyama R., Sasai Y., Nakanishi S. Molecular characterization of transcription factors that bind to the cAMP responsive region of the substance P precursor gene. cDNA cloning of a novel C/EBP-related factor. J Biol Chem. 1991 Aug 15;266(23):15525–15531. [PubMed] [Google Scholar]
- Kinoshita S., Akira S., Kishimoto T. A member of the C/EBP family, NF-IL6 beta, forms a heterodimer and transcriptionally synergizes with NF-IL6. Proc Natl Acad Sci U S A. 1992 Feb 15;89(4):1473–1476. doi: 10.1073/pnas.89.4.1473. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kreis T. E. Microinjected antibodies against the cytoplasmic domain of vesicular stomatitis virus glycoprotein block its transport to the cell surface. EMBO J. 1986 May;5(5):931–941. doi: 10.1002/j.1460-2075.1986.tb04306.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Laemmli U. K. Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature. 1970 Aug 15;227(5259):680–685. doi: 10.1038/227680a0. [DOI] [PubMed] [Google Scholar]
- Landschulz W. H., Johnson P. F., McKnight S. L. The DNA binding domain of the rat liver nuclear protein C/EBP is bipartite. Science. 1989 Mar 31;243(4899):1681–1688. doi: 10.1126/science.2494700. [DOI] [PubMed] [Google Scholar]
- Lee K. A., Bindereif A., Green M. R. A small-scale procedure for preparation of nuclear extracts that support efficient transcription and pre-mRNA splicing. Gene Anal Tech. 1988 Mar-Apr;5(2):22–31. doi: 10.1016/0735-0651(88)90023-4. [DOI] [PubMed] [Google Scholar]
- Lehrach H., Diamond D., Wozney J. M., Boedtker H. RNA molecular weight determinations by gel electrophoresis under denaturing conditions, a critical reexamination. Biochemistry. 1977 Oct 18;16(21):4743–4751. doi: 10.1021/bi00640a033. [DOI] [PubMed] [Google Scholar]
- Lichtsteiner S., Wuarin J., Schibler U. The interplay of DNA-binding proteins on the promoter of the mouse albumin gene. Cell. 1987 Dec 24;51(6):963–973. doi: 10.1016/0092-8674(87)90583-6. [DOI] [PubMed] [Google Scholar]
- López-Cabrera M., Letovsky J., Hu K. Q., Siddiqui A. Multiple liver-specific factors bind to the hepatitis B virus core/pregenomic promoter: trans-activation and repression by CCAAT/enhancer binding protein. Proc Natl Acad Sci U S A. 1990 Jul;87(13):5069–5073. doi: 10.1073/pnas.87.13.5069. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Majello B., Arcone R., Toniatti C., Ciliberto G. Constitutive and IL-6-induced nuclear factors that interact with the human C-reactive protein promoter. EMBO J. 1990 Feb;9(2):457–465. doi: 10.1002/j.1460-2075.1990.tb08131.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Metz R., Ziff E. cAMP stimulates the C/EBP-related transcription factor rNFIL-6 to trans-locate to the nucleus and induce c-fos transcription. Genes Dev. 1991 Oct;5(10):1754–1766. doi: 10.1101/gad.5.10.1754. [DOI] [PubMed] [Google Scholar]
- Morrone G., Ciliberto G., Oliviero S., Arcone R., Dente L., Content J., Cortese R. Recombinant interleukin 6 regulates the transcriptional activation of a set of human acute phase genes. J Biol Chem. 1988 Sep 5;263(25):12554–12558. [PubMed] [Google Scholar]
- Morrone G., Cortese R., Sorrentino V. Post-transcriptional control of negative acute phase genes by transforming growth factor beta. EMBO J. 1989 Dec 1;8(12):3767–3771. doi: 10.1002/j.1460-2075.1989.tb08553.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nakajima K., Wall R. Interleukin-6 signals activating junB and TIS11 gene transcription in a B-cell hybridoma. Mol Cell Biol. 1991 Mar;11(3):1409–1418. doi: 10.1128/mcb.11.3.1409. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Natsuka S., Isshiki H., Akira S., Kishimoto T. Augmentation of haptoglobin production in Hep3B cell line by a nuclear factor NF-IL6. FEBS Lett. 1991 Oct 7;291(1):58–62. doi: 10.1016/0014-5793(91)81103-f. [DOI] [PubMed] [Google Scholar]
- Oliviero S., Cortese R. The human haptoglobin gene promoter: interleukin-6-responsive elements interact with a DNA-binding protein induced by interleukin-6. EMBO J. 1989 Apr;8(4):1145–1151. doi: 10.1002/j.1460-2075.1989.tb03485.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Pei D. Q., Shih C. H. Transcriptional activation and repression by cellular DNA-binding protein C/EBP. J Virol. 1990 Apr;64(4):1517–1522. doi: 10.1128/jvi.64.4.1517-1522.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Poli V., Cortese R. Interleukin 6 induces a liver-specific nuclear protein that binds to the promoter of acute-phase genes. Proc Natl Acad Sci U S A. 1989 Nov;86(21):8202–8206. doi: 10.1073/pnas.86.21.8202. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Poli V., Mancini F. P., Cortese R. IL-6DBP, a nuclear protein involved in interleukin-6 signal transduction, defines a new family of leucine zipper proteins related to C/EBP. Cell. 1990 Nov 2;63(3):643–653. doi: 10.1016/0092-8674(90)90459-r. [DOI] [PubMed] [Google Scholar]
- Richards C. D., Brown T. J., Shoyab M., Baumann H., Gauldie J. Recombinant oncostatin M stimulates the production of acute phase proteins in HepG2 cells and rat primary hepatocytes in vitro. J Immunol. 1992 Mar 15;148(6):1731–1736. [PubMed] [Google Scholar]
- Roman C., Platero J. S., Shuman J., Calame K. Ig/EBP-1: a ubiquitously expressed immunoglobulin enhancer binding protein that is similar to C/EBP and heterodimerizes with C/EBP. Genes Dev. 1990 Aug;4(8):1404–1415. doi: 10.1101/gad.4.8.1404. [DOI] [PubMed] [Google Scholar]
- Ron D., Habener J. F. CHOP, a novel developmentally regulated nuclear protein that dimerizes with transcription factors C/EBP and LAP and functions as a dominant-negative inhibitor of gene transcription. Genes Dev. 1992 Mar;6(3):439–453. doi: 10.1101/gad.6.3.439. [DOI] [PubMed] [Google Scholar]
- Van Snick J. Interleukin-6: an overview. Annu Rev Immunol. 1990;8:253–278. doi: 10.1146/annurev.iy.08.040190.001345. [DOI] [PubMed] [Google Scholar]
- Williams S. C., Cantwell C. A., Johnson P. F. A family of C/EBP-related proteins capable of forming covalently linked leucine zipper dimers in vitro. Genes Dev. 1991 Sep;5(9):1553–1567. doi: 10.1101/gad.5.9.1553. [DOI] [PubMed] [Google Scholar]
- Woo P., Sipe J., Dinarello C. A., Colten H. R. Structure of a human serum amyloid A gene and modulation of its expression in transfected L cells. J Biol Chem. 1987 Nov 15;262(32):15790–15795. [PubMed] [Google Scholar]
- Yamasaki K., Taga T., Hirata Y., Yawata H., Kawanishi Y., Seed B., Taniguchi T., Hirano T., Kishimoto T. Cloning and expression of the human interleukin-6 (BSF-2/IFN beta 2) receptor. Science. 1988 Aug 12;241(4867):825–828. doi: 10.1126/science.3136546. [DOI] [PubMed] [Google Scholar]
- de Wet J. R., Wood K. V., DeLuca M., Helinski D. R., Subramani S. Firefly luciferase gene: structure and expression in mammalian cells. Mol Cell Biol. 1987 Feb;7(2):725–737. doi: 10.1128/mcb.7.2.725. [DOI] [PMC free article] [PubMed] [Google Scholar]