title: Design of GFB-111, a platelet-derived growth factor binding molecule with antiangiogenic and anticancer activity against human tumors in mice.
abstract: We have designed a molecule, GFB-111, that binds to platelet-derived growth factor (PDGF), prevents it from binding to its receptor tyrosine kinase, and blocks PDGF-induced receptor autophosphorylation, activation of Erk1 and Erk2 kinases, and DNA synthesis. GFB-111 is highly potent (IC50 = 250 nM) and selective for PDGF over EGF, IGF-1, aFGF, bFGF, and HRGbeta (IC50 values > 100 microM), but inhibits VEGF-induced Flk-1 tyrosine phosphorylation and Erk1/Erk2 activation with an IC50 of 10 microM. GFB-111 treatment of nude mice bearing human tumors resulted in significant inhibition of tumor growth and angiogenesis. The results demonstrate the feasibility of designing novel growth factor-binding molecules with potent anticancer and antiangiogenic activity.
authors.affiliation: Drug Discovery Program, H. Lee Moffitt Cancer Center and Research Institute, Department of Biochemistry and Molecular Biology and of Pathology, University of South Florida, Tampa, FL 33612, USA.
authors.forename: M A
authors.initials: MA
authors.lastname: Blaskovich
authors.forename: Q
authors.initials: Q
authors.lastname: Lin
authors.forename: F L
authors.initials: FL
authors.lastname: Delarue
authors.forename: J
authors.initials: J
authors.lastname: Sun
authors.forename: H S
authors.initials: HS
authors.lastname: Park
authors.forename: D
authors.initials: D
authors.lastname: Coppola
authors.forename: A D
authors.initials: AD
authors.lastname: Hamilton
authors.forename: S M
authors.initials: SM
authors.lastname: Sebti
mesh_terms: D020533:Angiogenesis Inhibitors / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology / Q000627:therapeutic use*; D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology / Q000627:therapeutic use*; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D004247:DNA / Q000096:biosynthesis; D015195:Drug Design; D016228:Endothelial Growth Factors / Q000037:antagonists & inhibitors / Q000494:pharmacology; D004789:Enzyme Activation / Q000187:drug effects; D005909:Glioblastoma / Q000098:blood supply / Q000188:drug therapy* / Q000473:pathology; D006801:Humans; D020128:Inhibitory Concentration 50; D008222:Lymphokines / Q000037:antagonists & inhibitors / Q000494:pharmacology; D051379:Mice; D008819:Mice, Nude; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D009368:Neoplasm Transplantation; D009389:Neovascularization, Pathologic / Q000188:drug therapy; D010456:Peptides, Cyclic / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology* / Q000627:therapeutic use; D010766:Phosphorylation / Q000187:drug effects; D010982:Platelet-Derived Growth Factor / Q000037:antagonists & inhibitors* / Q000378:metabolism / Q000494:pharmacology; D020794:Receptor Protein-Tyrosine Kinases / Q000378:metabolism; D017978:Receptors, Growth Factor / Q000378:metabolism; D017479:Receptors, Platelet-Derived Growth Factor / Q000037:antagonists & inhibitors / Q000378:metabolism; D040262:Receptors, Vascular Endothelial Growth Factor; D013379:Substrate Specificity; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
chemical_list: D020533:Angiogenesis Inhibitors; D000970:Antineoplastic Agents; D016228:Endothelial Growth Factors; C415600:GFB 111; D008222:Lymphokines; D010456:Peptides, Cyclic; D010982:Platelet-Derived Growth Factor; D017978:Receptors, Growth Factor; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors; D004247:DNA; D020794:Receptor Protein-Tyrosine Kinases; D017479:Receptors, Platelet-Derived Growth Factor; D040262:Receptors, Vascular Endothelial Growth Factor; D020928:Mitogen-Activated Protein Kinases