Incorporation of Fluorine into an OBOC Peptide Library by Copper-Free Click Chemistry toward the Discovery of PET Imaging Agents
journal contributionposted on 2020-02-06, 20:33 authored by Emily Murrell, Leonard G. Luyt
A one-bead one-compound (OBOC) library of peptide-based imaging agents was developed where a 19F-containing moiety was added onto the N-terminus of octamer peptides through copper-free click chemistry prior to screening of the library. This created a library of complete imaging agents that was screened against CXCR4, a receptor of interest for cancer imaging. The screen directly resulted in the discovery of a peptide-based imaging agent with an IC50 of 138 μM. This proof-of-concept study describes a new type of OBOC peptide library design, where hits discovered from screening can be easily translated into their fluorine-18 counterpart for PET imaging without loss of affinity.
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CXCRIC 50peptide-based imaging agentOBOC peptide library designPET imagingcopper-free click chemistryfluorine -18 counterpartimaging agents138 μ MPET Imaging Agentsone-bead one-compoundproof-of-concept studyscreeningoctamer peptides19 F-containing moietypeptide-based imaging agentsOBOC Peptide Librarycancer imagingCopper-Free Click Chemistry