Format

Send to

Choose Destination
Mol Carcinog. 2007 Jun;46(6):436-45.

Structure-activity relationship of flavonoids for inhibition of epidermal growth factor-induced transformation of JB6 Cl 41 cells.

Author information

1
Department of Hospital Pharmacy, School of Medicine, Kanazawa University, Kanazawa, Japan.

Abstract

We found that quercetin, myricetin, quercetagetin, fisetin, (-)-epigallocatechin gallate (EGCG), and theaflavins, among 24 flavonoids examined, markedly inhibited epidermal growth factor (EGF)-induced cell transformation of mouse epidermal JB6 Cl 41 cells. The six flavonoids suppressed the EGF-induced activation of activator protein 1 (AP-1). In addition, myricetin, quercetagetin, EGCG, and theaflavins directly inhibited EGF-induced phosphatidylinositol 3-kinase (PI3K) activation. The important structural features of flavonoids for cell transformation-inhibitory activity are 3'- and 4'-OH on the B-ring, 3-OH on the C-ring, C2=C3 double bond in the C-ring, and the phenylchromone (C6-C5-C6) skeleton in the flavonols, and the galloyl group in EGCG and theaflavins. Our results provide new insight into possible mechanisms of the anti-carcinogenic effects of flavonoids, and could help to provide a basis for the design of novel cancer chemopreventive agents.

PMID:
17219438
DOI:
10.1002/mc.20292
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center