title: A novel RGDS-analog inhibits angiogenesis in vitro and in vivo.
abstract: In this study the anti-angiogenic action of a novel non-peptide RGDS-analog named RAM was tested in vitro and in vivo. RAM inhibited FGF-2-induced chemotaxis by 80% in an adhesion-independent way. Further, it induced HUVEC-apoptosis in collagen-seeded HUVEC, indicating that such pro-apoptotic effect was adhesion-independent. In vivo studies revealed that RAM inhibited FGF-2 induced angiogenesis by 60% in the mouse Matrigel-assay and in the chicken-egg chorion-allantoic membrane assay. Finally, RAM was markedly more stable in serum as compared to the template RGDS and after 24 h incubation in 100% serum was significantly more active than RGDS. Taken together these results show that RAM exerts anti-chemotactic and pro-apoptotic effects, by an unexpected adhesion-independent mechanism, as we have recently shown for the template RGDS molecule [Blood 103 (2004) 4180], and has in vivo relevant anti-angiogenic properties, with marked stability in serum; therefore, RAM represents a novel promising anti-angiogenic molecule.
authors.affiliation: Laboratorio di Patologia Vascolare, Istituto Dermopatico della Immacolata, IDI, IRCCS, Rome, Italy.
authors.forename: M S
authors.initials: MS
authors.lastname: Aguzzi
authors.forename: F
authors.initials: F
authors.lastname: Facchiano
authors.forename: D
authors.initials: D
authors.lastname: Ribatti
authors.forename: R
authors.initials: R
authors.lastname: Gaeta
authors.forename: R
authors.initials: R
authors.lastname: Casadio
authors.forename: I
authors.initials: I
authors.lastname: Rossi
authors.forename: M C
authors.initials: MC
authors.lastname: Capogrossi
authors.forename: A
authors.initials: A
authors.lastname: Facchiano
mesh_terms: D020533:Angiogenesis Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D002448:Cell Adhesion / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D002478:Cells, Cultured; D002642:Chick Embryo; D004355:Drug Stability; D004730:Endothelium, Vascular / Q000166:cytology / Q000187:drug effects; D006801:Humans; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018919:Neovascularization, Physiologic / Q000187:drug effects*; D009842:Oligopeptides / Q000737:chemistry / Q000494:pharmacology*
chemical_list: C492321:1-carbamoyl-2-carboxyethylamino-malonyl-arginyl-phenylalanyl-argininamide; D020533:Angiogenesis Inhibitors; D009842:Oligopeptides; C046617:arginyl-glycyl-aspartyl-serine