title: Osteopontin modulates prostate carcinoma invasive capacity through RGD-dependent upregulation of plasminogen activators.
abstract: Osteopontin, a non-collageneous bone matrix protein, is produced in several human tumors but its role in cancer progression has been only partially elucidated. In this study we investigated the potential role of osteopontin in the malignancy of prostate cancer cells. Chemotaxis and chemoinvasion analyses revealed a dose-dependent increase in PC3 cell movement induced by osteopontin and a strict dependence of cell invasion on alphavbeta3 integrin function. The pattern of protease expression was modified by osteopontin and was characterized by an upregulation of plasminogen activators. Our findings suggest that osteopontin may confer selective malignant potential to prostate cancer cells through the enhancement of their invasive and proteolytic capability.
authors.affiliation: Department of Experimental Medicine, University of L'Aquila, Italy.
authors.forename: Adriano
authors.initials: A
authors.lastname: Angelucci
authors.forename: Claudio
authors.initials: C
authors.lastname: Festuccia
authors.forename: Gabriele
authors.initials: G
authors.lastname: D'Andrea
authors.forename: Anna
authors.initials: A
authors.lastname: Teti
authors.forename: Mauro
authors.initials: M
authors.lastname: Bologna
mesh_terms: D002633:Chemotaxis / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D006801:Humans; D008297:Male; D009361:Neoplasm Invasiveness; D009842:Oligopeptides / Q000494:pharmacology*; D053495:Osteopontin; D010960:Plasminogen Activators / Q000096:biosynthesis / Q000187:drug effects / Q000502:physiology*; D011471:Prostatic Neoplasms / Q000209:etiology* / Q000473:pathology; D019030:Receptors, Vitronectin / Q000502:physiology; D012795:Sialoglycoproteins / Q000494:pharmacology / Q000502:physiology*; D014407:Tumor Cells, Cultured; D015854:Up-Regulation / Q000187:drug effects; D014568:Urokinase-Type Plasminogen Activator / Q000096:biosynthesis / Q000187:drug effects / Q000502:physiology
chemical_list: D009842:Oligopeptides; D019030:Receptors, Vitronectin; C506895:SPP1 protein, human; D012795:Sialoglycoproteins; D053495:Osteopontin; C047981:arginyl-glycyl-aspartic acid; D010960:Plasminogen Activators; D014568:Urokinase-Type Plasminogen Activator