posted on 2020-02-06, 20:33authored byEmily 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.