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All rights reserved. http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/dc/elements/1.1/title BEL Framework Large Corpus Document http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/pav/authoredBy http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#_5 http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/pav/version 1.4 http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#_4 http://www.w3.org/ns/prov#value In order to identify genes associated with metastasis, suppression subtractive hybridization (SSH) was performed using murine osteosarcoma cell line Dunn and its subline with higher metastatic potential, LM8. SSH revealed expression of the gene encoding valosin-containing protein (VCP; also known as p97) to be constitutively activated in LM8 cells, but it declined in Dunn cells when the cells became confluent. Because VCP is known to be involved in the ubiquitination process of Inhibitor-kappaBalpha (IkappaBalpha), an inhibitor of nuclear factor-kappaB (NFkappaB), whether VCP influences NFkappaB activation or not was examined by using VCP-transfected Dunn cells (Dunn/VCPs). When stimulated with tumor necrosis factor-alpha (TNFalpha), Dunn/VCPs showed constantly activated NFkappaB, although in the original Dunn cells and control vector transfectant (Dunn/Dunn-c) NFkappaB activation ceased when the cells became confluent. Western immunoblot analysis showed an increase of phosphorylated IkappaBalpha (p-IkappaBalpha) in the cytoplasm of confluent Dunn/Dunn-c cells compared to that of Dunn/VCPs. Therefore, decrease of p-IkappaBalpha degrading activity might be responsible for the decrease in NFkappaB activation. In vitro apoptosis assay demonstrated increased apoptosis rates of Dunn/Dunn-c cells after TNFalpha stimulation compared to those of Dunn/VCPs and LM8 cells. In vivo metastasis assay showed increased incidences of metastatic events in Dunn/VCP-1 inoculated male C3H mice compared to those in Dunn/Dunn-c inoculated mice. These findings suggested that VCP expression plays an important role in the metastatic process. Anti-apoptotic potential in these cells owing to constant NFkappaB activation via efficient cytoplasmic p-IkappaBalpha degrading activity may explain the increased metastatic potential of these cells. http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#_4 http://www.w3.org/ns/prov#wasQuotedFrom http://www.ncbi.nlm.nih.gov/pubmed/11927012 http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#_5 http://www.w3.org/2000/01/rdf-schema#label Selventa http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#assertion http://www.w3.org/ns/prov#hadPrimarySource http://www.ncbi.nlm.nih.gov/pubmed/11927012 http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#assertion http://www.w3.org/ns/prov#wasDerivedFrom http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#assertion http://www.w3.org/ns/prov#wasDerivedFrom http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#_4 http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY#pubinfo http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY http://purl.org/dc/terms/created 2014-07-03T14:30:02.183+02:00 http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY http://purl.org/pav/createdBy http://orcid.org/0000-0001-6818-334X http://www.tkuhn.ch/bel2nanopub/RAW387i3uuOGDe_LSCOZgJt18rKD3BbDGgbEF5cZtotqY http://purl.org/pav/createdBy http://orcid.org/0000-0002-1267-0234