title: Endostatin's antiangiogenic signaling network.
abstract: It is here demonstrated that the set of gene expressions underlying the angiogenic balance in tissues can be molecularly reset en masse by a single protein. Using genome-wide expression profiling, coupled with RT-PCR and phosphorylation analysis, we show that the endogenous angiogenesis inhibitor endostatin downregulates many signaling pathways in human microvascular endothelium associated with proangiogenic activity. Simultaneously, endostatin is found to upregulate many antiangiogenic genes. The result is a unique alignment between the direction of gene regulation and angiogenic status. Profiling further reveals the regulation of genes not heretofore associated with angiogenesis. Our analysis of coregulated genes shows complex interpathway communications in an intricate signaling network that both recapitulates and extends on current understanding of the angiogenic process. More generally, insights into the nature of genetic networking from the cell biologic and therapeutic perspectives are revealed.
authors.affiliation: Department of Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany.
authors.forename: Amir
authors.initials: A
authors.lastname: Abdollahi
authors.forename: Philip
authors.initials: P
authors.lastname: Hahnfeldt
authors.forename: Christian
authors.initials: C
authors.lastname: Maercker
authors.forename: Hermann-Josef
authors.initials: HJ
authors.lastname: Gröne
authors.forename: Juergen
authors.initials: J
authors.lastname: Debus
authors.forename: Wilhelm
authors.initials: W
authors.lastname: Ansorge
authors.forename: Judah
authors.initials: J
authors.lastname: Folkman
authors.forename: Lynn
authors.initials: L
authors.lastname: Hlatky
authors.forename: Peter E
authors.initials: PE
authors.lastname: Huber
mesh_terms: D002478:Cells, Cultured; D004268:DNA-Binding Proteins / Q000235:genetics; D043169:Endostatins / Q000235:genetics / Q000502:physiology*; D042783:Endothelial Cells / Q000378:metabolism*; D036342:Ephrins / Q000235:genetics; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000235:genetics; D006801:Humans; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D051798:Inhibitor of Differentiation Protein 1; D016328:NF-kappa B / Q000235:genetics; D018919:Neovascularization, Physiologic / Q000235:genetics*; D010766:Phosphorylation; D011518:Proto-Oncogene Proteins / Q000235:genetics; D050783:Proto-Oncogene Proteins c-ets; D012333:RNA, Messenger / Q000378:metabolism; D012097:Repressor Proteins; D050794:STAT1 Transcription Factor; D015398:Signal Transduction / Q000235:genetics*; D015534:Trans-Activators / Q000235:genetics; D018808:Transcription Factor AP-1 / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics; D015854:Up-Regulation / Q000235:genetics
chemical_list: D004268:DNA-Binding Proteins; D043169:Endostatins; D036342:Ephrins; C497442:HIF1A protein, human; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; C497453:ID1 protein, human; D051798:Inhibitor of Differentiation Protein 1; D016328:NF-kappa B; D011518:Proto-Oncogene Proteins; D050783:Proto-Oncogene Proteins c-ets; D012333:RNA, Messenger; D012097:Repressor Proteins; D050794:STAT1 Transcription Factor; C494079:STAT1 protein, human; D015534:Trans-Activators; D018808:Transcription Factor AP-1; D014157:Transcription Factors; D014409:Tumor Necrosis Factor-alpha