title: Extracellular S100A4(mts1) stimulates invasive growth of mouse endothelial cells and modulates MMP-13 matrix metalloproteinase activity.
abstract: S100A4(mts1) protein expression has been strongly associated with metastatic tumor progression. It has been suggested as a prognostic marker for a number of human cancers. It is proposed that extracellular S100A4 accelerates cancer progression by stimulating the motility of endothelial cells, thereby promoting angiogenesis. Here we show that in 3D culture mouse endothelial cells (SVEC 4-10) respond to recombinant S100A4 by stimulating invasive growth of capillary-like structures. The outgrowth is not dependent on the stimulation of cell proliferation, but rather correlates with the transcriptional modulation of genes involved in the proteolytic degradation of extracellular matrix (ECM). Treatment of SVEC 4-10 with the S100A4 protein leads to the transcriptional activation of collagenase 3 (MMP-13) mRNA followed by subsequent release of the protein from the cells. Beta-casein zymography demonstrates enhancement of proteolytic activity associated with MMP-13. This observation indicates that extracellular S100A4 stimulates the production of ECM degrading enzymes from endothelial cells, thereby stimulating the remodeling of ECM. This could explain the angiogenic and metastasis-stimulating activity of S100A4(mts1).
authors.affiliation: Department of Molecular Cancer Biology, Institute for Cancer Biology, Danish Cancer Society, Strandboulevarden 49, DK-2100 Copenhagen, Denmark.
authors.forename: Birgitte
authors.initials: B
authors.lastname: Schmidt-Hansen
authors.forename: Dorte
authors.initials: D
authors.lastname: Ornås
authors.forename: Mariam
authors.initials: M
authors.lastname: Grigorian
authors.forename: Jörg
authors.initials: J
authors.lastname: Klingelhöfer
authors.forename: Eugene
authors.initials: E
authors.lastname: Tulchinsky
authors.forename: Eugene
authors.initials: E
authors.lastname: Lukanidin
authors.forename: Noona
authors.initials: N
authors.lastname: Ambartsumian
mesh_terms: D000818:Animals; D002471:Cell Transformation, Neoplastic / Q000378:metabolism* / Q000473:pathology; D017364:Collagenases / Q000378:metabolism*; D017077:Culture Media, Conditioned; D010450:Endopeptidases / Q000235:genetics / Q000378:metabolism; D053509:Matrix Metalloproteinase 13; D051379:Mice; D009361:Neoplasm Invasiveness; D012333:RNA, Messenger; D000071999:S100 Calcium-Binding Protein A4; D009418:S100 Proteins / Q000378:metabolism*
chemical_list: D017077:Culture Media, Conditioned; D012333:RNA, Messenger; D000071999:S100 Calcium-Binding Protein A4; D009418:S100 Proteins; C470944:S100a4 protein, mouse; D010450:Endopeptidases; D017364:Collagenases; C507079:MMP13 protein, human; D053509:Matrix Metalloproteinase 13; C507081:Mmp13 protein, mouse