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Novel Peptides Selected to Bind Vascular Endothelial Growth Factor Target the Receptor-Binding Site

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journal contribution
posted on 04.12.1998, 00:00 by Wayne J. Fairbrother, Hans W. Christinger, Andrea G. Cochran, Germaine Fuh, Christopher J. Keenan, Clifford Quan, Stephanie K. Shriver, Jeffrey Y. K. Tom, James A. Wells, Brian C. Cunningham
Peptides that inhibit binding of vascular endothelial growth factor (VEGF) to its receptors, KDR and Flt-1, have been produced using phage display. Libraries of short disulfide-constrained peptides yielded three distinct classes of peptides that bind to the receptor-binding domain of VEGF with micromolar affinities. The highest affinity peptide was also shown to antagonize VEGF-induced proliferation of primary human umbilical vascular endothelial cells. The peptides bind to a region of VEGF known to contain the contact surface for Flt-1 and the functional determinants for KDR binding. This suggests that the receptor-binding region of VEGF is a binding “hot spot” that is readily targeted by selected peptides and supports earlier assertions that phage-derived peptides frequently target protein−protein interaction sites. Such peptides may lead to the development of pharmacologically useful VEGF antagonists.