Xanthine oxidase inhibitory constituents from the roots of < em > Ampelopsis japonica < /em >

Nat Prod Res. 2024 Apr 18:1-10. doi: 10.1080/14786419.2024.2341308. Online ahead of print.ABSTRACTBioassay-guided purification of the xanthine oxidase (XOD) inhibitory extract of the roots of Ampelopsis japonica resulted in the isolation of two new triterpenoids (1-2), designated Ampejaponoside A and B, along with sixteen known compounds (3-18). The structures of Ampejaposide A and B were elucidated by comprehensive analysis of spectroscopic data with the structures of the known compounds 3-18 confirmed by comparison the spectral data with corresponding values reported in literatures. All the isolates were evaluated for their XOD inhibitory activity in vitro. As a result, compounds 2, 8, and 14-16 displayed significant XOD inhibitory effect, particularly 16 being the most potent with an IC50 value of 0.21 μM, superior to positive substance allopurinol (IC50 1.95 μM). Molecular docking uncovered a unique interaction mode of 16 with the active site of XOD. The current study showed that the triterpenoids and polyphenols from A. japonica could serve as new lead compounds with the potential to speed up the development of novel XOD inhibitors with clinical potential to treat hyperuricaemia and gout.PMID:38635344 | DOI:10.1080/14786419.2024.2341308
Source: Natural Product Research - Category: Biochemistry Authors: Source Type: research