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- W4385695628 abstract "Abstract TIGIT is an emerging immune checkpoint receptor expressed higher than PD-1 in some tumors especially anti-PD1 resistant tumors. By competing with the co-stimulatory receptor CD226/DNAM-1 for binding to CD155/PVR, TIGIT transduces inhibitory signals and suppresses the immune response. Therefore, we sought to discover TIGIT inhibitors for improving tumor immunotherapy. Through directional cloning, bacterial transformation and phage amplification techniques, we generated a novel genetically encoded, phage-displayed bicyclic peptide library comprised of more than a million peptide sequences. Depending on the two combinations of different disulfide bonds, each peptide backbone is predicted to be folded into either endo-bicyclic or exo-bicyclic structure. We conducted three rounds of phage display panning against recombinant TIGIT IgV domain that enriched high-affinity peptides and identified promising TIGIT binding peptides. Phage ELISA showed binding of phage-presented peptides to recombinant TIGIT IgV and competitive ELISA evaluated the ability of the peptides to disrupt interactions between TIGIT and PVR. This work validated the efficiency of the phage-displayed bicyclic peptide library for discovery of ligands targeting protein receptors and led to identification of novel TIGIT inhibitors. AAI Careers in Immunology Fellowship" @default.
- W4385695628 created "2023-08-10" @default.
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- W4385695628 date "2023-05-01" @default.
- W4385695628 modified "2023-09-23" @default.
- W4385695628 title "Discovery of TIGIT inhibitors by phage display" @default.
- W4385695628 doi "https://doi.org/10.4049/jimmunol.210.supp.62.06" @default.
- W4385695628 hasPublicationYear "2023" @default.
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