title: Differential inhibition of renal cancer cell invasion mediated by fibronectin, collagen IV and laminin.
abstract: Invasion of tumor cells into the extracellular matrix is an essential step in the formation of metastases in renal cancer. Cell adhesion molecules such as beta(1)-integrins, which bind to the RGD sequence (arginine-glycine-asparagine) and CD44 are involved in this process. We examined the invasion of a renal carcinoma cell line (CCF-RC1) into the extracellular matrix compounds fibronectin, collagen IV and laminin and the effect of TGFbeta and IFNgamma on this process. The inhibitory effect of an antibody against the beta(1)-subunit of integrins (CD29), as well as a pentapeptide including the RGD sequence, was also evaluated. A micro-chemotaxis chamber, including a polycarbonate membrane with a pore diameter of 8 microm, was used for quantification of cell migration. The addition of the extracellular matrix compounds fibronectin, laminin and collagen IV resulted in a 5-10-fold increase in invasion. This increased invasion depends strongly on the presence of beta(1)-integrins, shown by the use of an antibody against CD29 or a RGD including peptide which inhibit the cell migration by approximately 88%. CD44 is less involved in collagen IV dependent migration and almost no influence of CD44 was observed on a fibronectin and laminin dependent migration. TNFalpha and IFNgamma did not significantly influence the expression of CD29 or CD44, and no alteration in tumor cell migration was observed. These results show that the invasion of renal cancer cells is differentially regulated by compounds of the extracellular matrix, whereby fibronectin seems to be the most critical factor. The molecular interactions in this process are strongly dependent on beta(1)-integrins and the corresponding amino acid sequence RGD.
authors.affiliation: Urological Clinic and Policlinic, Johannes Gutenberg Universität, Langenbeckstrasse 1, 55131, Mainz, Germany. brenner@mail.uni-mainz.de
authors.forename: W
authors.initials: W
authors.lastname: Brenner
authors.forename: S
authors.initials: S
authors.lastname: Gross
authors.forename: F
authors.initials: F
authors.lastname: Steinbach
authors.forename: S
authors.initials: S
authors.lastname: Horn
authors.forename: R
authors.initials: R
authors.lastname: Hohenfellner
authors.forename: J W
authors.initials: JW
authors.lastname: Thüroff
mesh_terms: D002292:Carcinoma, Renal Cell / Q000378:metabolism*; D002465:Cell Movement / Q000187:drug effects; D002633:Chemotaxis / Q000187:drug effects; D003094:Collagen / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D005109:Extracellular Matrix / Q000378:metabolism; D005353:Fibronectins / Q000494:pharmacology*; D006801:Humans; D018960:Hyaluronan Receptors / Q000378:metabolism; D019012:Integrin beta1 / Q000378:metabolism; D007371:Interferon-gamma / Q000494:pharmacology; D007680:Kidney Neoplasms / Q000378:metabolism*; D007797:Laminin / Q000494:pharmacology*; D009361:Neoplasm Invasiveness; D009842:Oligopeptides / Q000494:pharmacology; D016212:Transforming Growth Factor beta / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D005353:Fibronectins; D018960:Hyaluronan Receptors; D019012:Integrin beta1; D007797:Laminin; D009842:Oligopeptides; D016212:Transforming Growth Factor beta; C047981:arginyl-glycyl-aspartic acid; D007371:Interferon-gamma; D003094:Collagen