Design and Synthesis of Poly(ADP-ribose) Polymerase Inhibitors: Impact of Adenosine Pocket-Binding Motif Appendage to the 3-Oxo-2,3-dihydrobenzofuran-7-carboxamide on Potency and Selectivity.

ABSTRACT: Poly(adenosine 5'-diphosphate-ribose) polymerase (PARP) inhibitors are a class of anticancer drugs that block the catalytic activity of PARP proteins. Optimization of our lead compound 1 (( Z)-2-benzylidene-3-oxo-2,3-dihydrobenzofuran-7-carboxamide; PARP-1 IC₅₀ = 434 nM) led to a tetrazolyl analogue (51, IC₅₀ = 35 nM) with improved inhibition. Isosteric replacement of the tetrazole ring with a carboxyl group (60, IC₅₀ = 68 nM) gave a promising new lead, which was subsequently optimized to obtain analogues with potent PARP-1 IC₅₀ values (4-197 nM). PARP enzyme profiling revealed that the majority of compounds are selective toward PARP-2 with IC₅₀ values comparable to clinical inhibitors. X-ray crystal structures of the key inhibitors bo

SUBMITTER: Velagapudi UK 

PROVIDER: S-EPMC7378964 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature