title: MMP-9-hemopexin domain hampers adhesion and migration of colorectal cancer cells.
abstract: Matrix metalloproteinases (MMPs), in particular MMP-2 and MMP-9, are involved in colon cancer progression and metastasis due to their ability to degrade extracellular matrix (ECM) components. In previous studies we described the MMP-9 hemopexin like domain (MMP-9-PEX) as an MMP-9 antagonist. In the present study it was examined whether recombinant MMP-9-PEX has an inhibitory effect on migration and adhesion of colorectal carcinoma cells. Furthermore, we searched for MMP-9 substrate binding sites within the MMP-9-PEX by surface plasmon resonance. Migration of SW620 and LS174 cells was investigated in a modified Boyden chamber assay. In the presence of 0.2 microg/ml MMP-9-PEX migration of SW620 was decreased by 34%, while addition of 0.4 microg/ml diminished migration by 56%. Migration of LS174 cells was not affected by MMP-9-PEX. Adhesion studies were performed on 96-well plates coated with gelatin, collagen type I, and laminin, respectively. In the presence of MMP-9-PEX, adhesion of SW620 cells to these coating substrates was significantly inhibited. Surface plasmon resonance studies revealed binding of collagen type I and IV, elastin, and fibrinogen to proMMP-9 as well as to MMP-9-PEX. However, equilibrium constants (Kd) indicated a higher affinity of proMMP-9 to the matrix proteins. This could indicate that there is more than one binding site for matrix components within the entire proMMP-9 molecule. Since migration and adhesion of metastatic colorectal carcinoma cells were reduced by MMP-9-PEX, this recombinant MMP-9 antagonist might be of therapeutical interest.
authors.affiliation: Medical Clinic and Out-patient Department II (Gastroenterology), University Hospital Giessen and Marburg GmbH, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Burg-Roderfeld
authors.forename: M
authors.initials: M
authors.lastname: Roderfeld
authors.forename: S
authors.initials: S
authors.lastname: Wagner
authors.forename: C
authors.initials: C
authors.lastname: Henkel
authors.forename: J
authors.initials: J
authors.lastname: Grötzinger
authors.forename: E
authors.initials: E
authors.lastname: Roeb
mesh_terms: D000970:Antineoplastic Agents / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology*; D002448:Cell Adhesion / Q000187:drug effects*; D045744:Cell Line, Tumor; D002465:Cell Movement / Q000187:drug effects*; D024042:Collagen Type I / Q000378:metabolism; D024141:Collagen Type IV / Q000378:metabolism; D015179:Colorectal Neoplasms / Q000201:enzymology / Q000473:pathology*; D004549:Elastin / Q000378:metabolism; D005340:Fibrinogen / Q000378:metabolism; D005780:Gelatin / Q000378:metabolism; D006466:Hemopexin / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology*; D006801:Humans; D020780:Matrix Metalloproteinase 9 / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism* / Q000494:pharmacology; D017434:Protein Structure, Tertiary / Q000235:genetics; D011993:Recombinant Fusion Proteins; D011994:Recombinant Proteins / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology; D020349:Surface Plasmon Resonance
chemical_list: D000970:Antineoplastic Agents; D024042:Collagen Type I; D024141:Collagen Type IV; D011993:Recombinant Fusion Proteins; D011994:Recombinant Proteins; D005780:Gelatin; D005340:Fibrinogen; D004549:Elastin; D006466:Hemopexin; C519272:MMP-9-hemopexin; D020780:Matrix Metalloproteinase 9