title: Nuclear factor-kappaB motif and interferon-alpha-stimulated response element co-operate in the activation of guanylate-binding protein-1 expression by inflammatory cytokines in endothelial cells.
abstract: The large GTPase GBP-1 (guanylate-binding protein-1) is a major IFN-gamma (interferon-gamma)-induced protein with potent anti-angiogenic activity in endothelial cells. An ISRE (IFN-alpha-stimulated response element) is necessary and sufficient for the induction of GBP-1 expression by IFN-gamma. Recently, we have shown that in vivo GBP-1 expression is strongly endothelial-cell-associated and is, in addition to IFN-gamma, also activated by interleukin-1beta and tumour necrosis factor-alpha, both in vitro and in vivo [Lubeseder-Martellato, Guenzi, Jörg, Töpolt, Naschberger, Kremmer, Zietz, Tschachler, Hutzler, Schwemmle et al. (2002) Am. J. Pathol. 161, 1749-1759; Guenzi, Töpolt, Cornali, Lubeseder-Martellato, Jörg, Matzen, Zietz, Kremmer, Nappi, Schwemmle et al. (2001) EMBO J. 20, 5568-5577]. In the present study, we identified a NF-kappaB (nuclear factor kappaB)-binding motif that, together with ISRE, is required for the induction of GBP-1 expression by interleukin-1beta and tumour necrosis factor-alpha. Deactivation of the NF-kappaB motif reduced the additive effects of combinations of these cytokines with IFN-gamma by more than 50%. Importantly, NF-kappaB p50 rather than p65 activated the GBP-1 promoter. The NF-kappaB motif and ISRE were detected in an almost identical spatial organization, as in the GBP-1 promoter, in the promoter regions of various inflammation-associated genes. Therefore both motifs may constitute a cooperative inflammatory cytokine response module that regulates GBP-1 expression. Our findings may open new perspectives for the use of NF-kappaB inhibitors to support angiogenesis in inflammatory diseases including ischaemia.
authors.affiliation: Department of Virus-induced Vasculopathy, GSF-National Research Center for Environment and Health, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Naschberger
authors.forename: Thomas
authors.initials: T
authors.lastname: Werner
authors.forename: Ana B
authors.initials: AB
authors.lastname: Vicente
authors.forename: Eric
authors.initials: E
authors.lastname: Guenzi
authors.forename: Kristin
authors.initials: K
authors.lastname: Töpolt
authors.forename: René
authors.initials: R
authors.lastname: Leubert
authors.forename: Clara
authors.initials: C
authors.lastname: Lubeseder-Martellato
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Nelson
authors.forename: Michael
authors.initials: M
authors.lastname: Stürzl
mesh_terms: D001483:Base Sequence; D001665:Binding Sites; D002478:Cells, Cultured; D016207:Cytokines / Q000494:pharmacology*; D004268:DNA-Binding Proteins / Q000378:metabolism; D004730:Endothelium, Vascular / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D019204:GTP-Binding Proteins; D006801:Humans; D007249:Inflammation / Q000276:immunology; D050856:Interferon Regulatory Factor-1; D016898:Interferon-alpha / Q000502:physiology; D007375:Interleukin-1 / Q000494:pharmacology; D008969:Molecular Sequence Data; D016328:NF-kappa B / Q000378:metabolism* / Q000502:physiology; D010750:Phosphoproteins / Q000378:metabolism; D011401:Promoter Regions, Genetic; D011506:Proteins / Q000235:genetics*; D020569:Proto-Oncogene Proteins c-rel / Q000378:metabolism; D020218:Response Elements; D015533:Transcriptional Activation; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D016207:Cytokines; D004268:DNA-Binding Proteins; C490287:GBP1 protein, human; C494257:IRF1 protein, human; D050856:Interferon Regulatory Factor-1; D016898:Interferon-alpha; D007375:Interleukin-1; D016328:NF-kappa B; D010750:Phosphoproteins; D011506:Proteins; D020569:Proto-Oncogene Proteins c-rel; D014409:Tumor Necrosis Factor-alpha; D019204:GTP-Binding Proteins