Abstract
Carboxylated chalcones and other related flavonoids were synthesized and evaluated as inhibitors of xanthine oxidase, which is a known target for synthetic and herbal drugs used against hyperuricemia, gout, and other diseases. The 4-carboxylated chalcones with hydroxy, methoxy, and ethoxy groups at ring A were found to exhibit in vitro inhibitory activities with IC50 values in the range of 0.057 to 0.26 μM, being 10–60-fold more potent than allopurinol. Structurally related carboxylic acids with Δ3,9-homoisoflavonoid and flavone scaffolds also showed micromolar activity towards xanthine oxidase. At the same time, dihydrochalcone and Δ2,3-homoisoflavonoid carboxylic acids as well as their oxa-analogues were more than two orders of magnitude less effective inhibitors. Kinetic and molecular docking studies indicated that the carboxylated chalcones and Δ3,9-homoisoflavonoids are mixed-type inhibitors, which mostly bind to free enzyme occupying the active site of xanthine oxidase.
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This work was supported by the National Academy of Sciences of Ukraine.
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Kobzar, O.L., Tatarchuk, A.V., Mrug, G.P. et al. Carboxylated chalcones and related flavonoids as inhibitors of xanthine oxidase. Med Chem Res 32, 1804–1815 (2023). https://doi.org/10.1007/s00044-023-03109-8
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DOI: https://doi.org/10.1007/s00044-023-03109-8