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Guardiola, Salvador; Díaz-Lobo, Mireia; Seco, Jesús; García, Jesús; Nevola, Laura; Giralt, Ernest
Chembiochem : a European journal of chemical biology, April 15, 2016, Letnik: 17, Številka: 8Journal Article
Epidermal growth factor receptor (EGFR) is a key target in chemotherapy. Some drugs acting on the receptor are currently in use; however, drug resistance, which causes tumour relapse, calls for the discovery of alternative inhibitors. Using docking and receptor hotspot mimicry, we have designed novel peptides directed at EGF, the main growth factor ligand of EGFR. An array of biophysical techniques was used to characterise the structure and interaction of these ligands with the target protein. Both design methods identified peptides able to bind EGF, and the capacity of these peptides to inhibit the interaction between EGF and EGFR was demonstrated in two in vitro systems. Based on targeting the smaller companion of a protein–protein interaction, the new approach described herein can be envisaged as a parallel drug design strategy, and our compounds represent the first in a new class of binders that could serve as complementary compounds in potential multidrug cancer therapy. A novel EGF–EGFR targeting approach: A new class of peptide ligands against EGF has been designed by using computer‐aided docking and EGFR hotspot mimicry. Their binding to EGF was studied in detail, and their ability to disrupt the EGF–EGFR interaction was demonstrated in vitro.
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