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Design, synthesis, and evaluation of the in vitro activity of novel dual inhibitors of XOR and URAT1 containing a benzoic acid group.
Chemical Biology & Drug Design 2023 September 13
Xanthine oxidoreductase (XOR) and uric acid transporter 1 (URAT1) are involved in the production and reabsorption of uric acid, respectively. However, the currently available individual XOR- or URAT1-targeted drugs have limited efficacy. Thus, strategies for combining XOR inhibitors with uricosuric drugs have been developed. Previous virtual screening identified Compounds 1-5 as hits for the potential dual inhibition of XOR/URAT1. Nevertheless, in vitro experiments yielded unsatisfactory results. The first round of optimization work on those hits was performed, and two series of compounds were designed and synthesized. Compounds of the A series exerted moderate inhibitory effects on URAT1, but extremely weak inhibitory effects on XOR. Compounds of the B series exerted strong inhibitory effects on both XOR and URAT1. B5 exhibited the greatest inhibitory activity, with similar inhibitory effects on XOR and URAT1. The half maximal inhibitory concentration (IC50 ) of XOR was 0.012 ± 0.001 μM, equivalent to that of febuxostat (IC50 = 0.010 ± 0.001 μM). The IC50 of URAT1 was 30.24 ± 3.46 μM, equivalent to that of benzbromarone (IC50 = 24.89 ± 7.53 μM). Through this optimization, the in vitro activity of most compounds of the A and B series against XOR and URAT1 was significantly improved versus that of the hits. Compound B5 should be further investigated.
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