New flavonoids, emarginin A-C from Vaccinium emarginatum Hayata.

Abstract:

:Phytochemical investigation of methanolic extract of the whole plants of Vaccinium emarginatum allowed for the characterization of one epicatechin derivative (1) that was isolated from a natural source for the first time and three new flavonoids, emarginin A (2), emarginin B (3), and emarginin C (4), together with 11 known compounds (5-15). The structures of compounds 1-4 were elucidated by combination of spectroscopic analysis (MS, IR, and NMR) and by comparison with that of literature analogues. Compounds 1-8 and 11-15 were evaluated for their preliminary in vitro anti-proliferative activity against Du145 and PC-3 prostate cancer cell lines. Among them, compound 15 exhibited most potent cytotoxicity against Du145 and PC-3 cells, with IC50 values of 8.46 and 10.98 μM, respectively. Furthermore, compounds 1-7 were assessed for their anti-inflammatory potential against lipopolysaccharide (LPS)-induced nitric oxide (NO) production in RAW 264.7 cells. Compound 4 exhibited moderate anti-inflammatory activity, with an IC50 value of 27.99 μM.

journal_name

Fitoterapia

journal_title

Fitoterapia

authors

Tu PC,Liang YC,Huang GJ,Huang HC,Kao MC,Lu TL,Kuo YH

doi

10.1016/j.fitote.2019.104446

subject

Has Abstract

pub_date

2020-03-01 00:00:00

pages

104446

eissn

0367-326X

issn

1873-6971

pii

S0367-326X(19)31609-0

journal_volume

141

pub_type

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