Screening the peptide high-binding VEGF receptor 3 with phage-displayed random peptide library / 第三军医大学学报

ABSTRACT

Objective To get a high affinity peptide of vascular endothelial growth factor receptor 3 (VEGFR3) as a potent carrier targeted to lymphangiogenesis of ovarian cancer via the technology of phage display. Methods Solid-phase was panned with direct VEGFR3 extracellular protein coating, then the unbound phage was washed away and the eluted phage was amplified. The positive phage clones were identified by ELISA and sequenced, and the affinity and specialty were identified by competent ELISA. Results After four-round bio-panning, the enriched positive phage clones were identified by ELISA. Eight positive phage clones were sequenced and 5 were consensus (WHGSLKQNLWWY). The short peptide displayed on screened positive phage could bind specifically to VEGFR3, and the binding could be inhibited by natural antibody VEGF-D. Conclusion The phage clone (phage-WHGSLKQNLWWY) obtained via bio-panning of peptide library has a high affinity with VEGF receptor 3. The peptide could be a potent carrier targeted to VEGFR3.