title: Rhodostomin inhibits the transforming growth factor-beta1-enhanced adhesion activity of ROS 17/2.8 osteosarcoma cells.
abstract: We have investigated the effect of transforming growth factor-beta1 (TGF-beta1) on the in vitro adhesion activity of the rat osteosarcoma cell lines (ROS 17/2.8) to extracellular matrix substrata, including fibronectin, type I and IV collagen, as well as laminin. The interaction of Arg-Gly-Asp (RGD) and rhodostomin, an RGD containing snake venom, with TGF-beta1 on the cell adhesion was also evaluated. The results showed that incubation with various concentration of TGF-beta1 (1-15 ng/ml) significantly increased the adhesion activity (1.4 to 2.5 folds) of ROS 17/2.8 to fibronectin and type I collagen (p<0.01), whereas the adhesion activity to laminin and type IV collagen was slightly elevated (1.1 to 1.5 folds). The peak effect of TGF-beta1 on the cell adhesion occurred after pretreatment of ROS 17/2.8 with TGF-beta1 for 6 hours. Treatment with Arg-Gly-Asp-Ser (RGDS) and rhodostomin effectively suppressed the TGF-beta1-enhanced adhesion activity to fibronectin and type I collagen. This study demonstrated that the up-regulated cell adhesion activity of ROS 17/2.8 cells by the TGF-beta1 can be inhibited by the rhodostomin.
authors.affiliation: Department of Orthopaedics, College of Medicine, National Taiwan University, Taipei. Yang@ha.mc.ntu.edu.tw
authors.forename: R S
authors.initials: RS
authors.lastname: Yang
authors.forename: T F
authors.initials: TF
authors.lastname: Huang
mesh_terms: D000818:Animals; D002448:Cell Adhesion / Q000187:drug effects*; D005109:Extracellular Matrix / Q000378:metabolism; D009842:Oligopeptides / Q000494:pharmacology; D012516:Osteosarcoma / Q000473:pathology* / Q000556:secondary; D010455:Peptides / Q000378:metabolism / Q000494:pharmacology*; D051381:Rats; D016212:Transforming Growth Factor beta / Q000037:antagonists & inhibitors* / Q000378:metabolism / Q000494:pharmacology; D053773:Transforming Growth Factor beta1; D014407:Tumor Cells, Cultured
chemical_list: D009842:Oligopeptides; D010455:Peptides; C508962:Tgfb1 protein, rat; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; C072026:rhodostomin; C046617:arginyl-glycyl-aspartyl-serine