title: A KDR-binding peptide (ST100,059) can block angiogenesis, melanoma tumor growth and metastasis in vitro and in vivo.
abstract: A major goal of treatment strategies for cancer is the development of agents which can block primary tumor growth and development as well as the progression of tumor metastasis without any treatment associated side effects. Using mini peptide display (MPD) technology, we generated peptides that can bind to the human vascular endothelial growth factor (VEGF) receptor KDR. These peptides were evaluated for their ability to block angiogenesis, tumor growth and metastasis in vitro and in vivo. A D-amino acid peptide with high serum stability (ST100,059) was found to have the most potent activity in vitro as indicated by inhibition of VEGF stimulation of endothelial cells. It was also found to be the most active of the series in blocking VEGF-mediated activity in vivo, as measured in Matrigel-filled angioreactors implanted in mice. ST100,059 blocks VEGF-induced MAPK phosphorylation, as well as inhibits VEGF-induced changes in gene expression in HUVEC cells. In in vivo studies, treatment of female C57BL/6 mice inoculated with B16 mouse melanoma cells with ST100,059 resulted in a dose-dependent decrease in tumor volume and lung metastasis as compared to control groups of animals receiving vehicle alone. These studies demonstrate that by using MPD, peptides can be identified with enhanced affinity relative to those discovered using phage display. Based on these studies we have identified one such peptide ST100,059 which can effectively block tumor growth and metastasis due to its anti-angiogenic effects and ability to block intracellular signaling pathways involved in tumor progression.
authors.affiliation: Sopherion Therapeutics Inc., New Haven, CT 08540, USA.
authors.forename: Luca
authors.initials: L
authors.lastname: Rastelli
authors.forename: Maria Luisa
authors.initials: ML
authors.lastname: Valentino
authors.forename: Melissa Corso
authors.initials: MC
authors.lastname: Minderman
authors.forename: Judith
authors.initials: J
authors.lastname: Landin
authors.forename: Uriel M
authors.initials: UM
authors.lastname: Malyankar
authors.forename: Mary K
authors.initials: MK
authors.lastname: Lescoe
authors.forename: Richard
authors.initials: R
authors.lastname: Kitson
authors.forename: Kenneth
authors.initials: K
authors.lastname: Brunson
authors.forename: Lina
authors.initials: L
authors.lastname: Souan
authors.forename: Salvatore
authors.initials: S
authors.lastname: Forenza
authors.forename: Ronald H
authors.initials: RH
authors.lastname: Goldfarb
authors.forename: Shafaat A
authors.initials: SA
authors.lastname: Rabbani
mesh_terms: D000595:Amino Acid Sequence; D020533:Angiogenesis Inhibitors / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D000818:Animals; D002417:Cattle; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D042783:Endothelial Cells / Q000187:drug effects / Q000378:metabolism; D016228:Endothelial Growth Factors / Q000494:pharmacology; D005260:Female; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D008175:Lung Neoplasms / Q000378:metabolism / Q000556:secondary; D008546:Melanoma, Experimental / Q000378:metabolism / Q000473:pathology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D009389:Neovascularization, Pathologic / Q000378:metabolism*; D019151:Peptide Library; D010455:Peptides / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D011485:Protein Binding; D015398:Signal Transduction / Q000187:drug effects / Q000235:genetics; D040301:Vascular Endothelial Growth Factor Receptor-2 / Q000378:metabolism*; D023041:Xenograft Model Antitumor Assays
chemical_list: D020533:Angiogenesis Inhibitors; D016228:Endothelial Growth Factors; D019151:Peptide Library; D010455:Peptides; D040301:Vascular Endothelial Growth Factor Receptor-2