Chemical and Pharmaceutical Bulletin p. 741 - 747 (2018)
Update date:2022-08-16
Topics:
Nishiwaki, Keiji
Ohigashi, Kanae
Deguchi, Takahiro
Murata, Kazuya
Nakamura, Shinya
Matsuda, Hideaki
Nakanishi, Isao
Hydroxychavicol (HC), which is obtained from the leaves of Piper betle LINN. (Piperaceae), inhibits xanthine oxidase (XO) with an IC50 value of 16.7μM, making it more potent than the clinically used allopurinol (IC50=30.7μM). Herein, a structure–activity relationship analysis of the polar part analogs of HC was conducted and an inhibitor was discovered with a potency 13 times that of HC. Kinetic studies have revealed that HC and its active analog inhibit XO in an uncompetitive manner. The binding structure prediction of these inhibitor molecules to the XO complex with xanthine suggested that both compounds (HC and its analog) could simultaneously form hydrogen bonds with xanthine and XO.
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