Synthesis and evaluation of xanthine oxidase inhibitory and antioxidant activities of 2-arylbenzo[b]furan derivatives based on salvianolic acid C.

Abstract:

:Xanthine oxidase (XO) is the key enzyme in humans which is related to a variety of diseases such as gout, hyperuricemia and cardiovascular diseases. In this work, a series of 2-arylbenzo[b]furan derivatives were synthesized based on salvianolic acid C, and they were evaluated for xanthine oxidase inhibitory and antioxidant activities. Compounds 5b, 6a, 6e and 6f showed potent xanthine oxidase inhibitory activities with IC50 values ranging from 3.99 to 6.36 μM, which were comparable with that of allopurinol. Lineweaver-Burk plots analysis revealed that the representative derivative 6e could bind to either xanthine oxidase or the xanthine oxidase-xanthine complex, which exhibited a mixed-type competitive mechanism. A DPPH radical scavenging assay showed most of the hydroxyl-functionalized 2-arylbenzo[b]furan derivatives possessed the potent antioxidant activity, which was further validated on LPS-stimulated RAW 264.7 macrophages model. The structure-activity relationships were preliminary analyzed and indicated that the structural skeleton of 2-arylbenzo[b]furan and phenolic hydroxyl groups played an important role in maintaining xanthine oxidase inhibitory effect and antioxidant property for the series of derivatives. Meanwhile, molecular docking studies were performed to further confirm the structure-activity relationships and investigate the proposed binding mechanisms of compounds 5d, 6d and 10d binding to the protein.

journal_name

Eur J Med Chem

authors

Tang HJ,Zhang XW,Yang L,Li W,Li JH,Wang JX,Chen J

doi

10.1016/j.ejmech.2016.08.019

subject

Has Abstract

pub_date

2016-11-29 00:00:00

pages

637-648

eissn

0223-5234

issn

1768-3254

pii

S0223-5234(16)30662-6

journal_volume

124

pub_type

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