4.7 Article

1 '-Acetoxychavicol Acetate Enhances the Phase II Enzyme Activities via the Increase in Intranuclear Nrf2 Level and Cytosolic p21 Level

Journal

AMERICAN JOURNAL OF CHINESE MEDICINE
Volume 39, Issue 4, Pages 789-802

Publisher

WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0192415X11009196

Keywords

1 '-Acetoxychavicol acetate; Phase II Enzyme; Nuclear Factor-Erythroid 2-Related Factor 2; Glutathione; Intestine Epithelial Cells

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(1'S)-acetoxychavicol acetate ((S)-ACA) exhibits chemopreventive effects on chemically induced tumor formation. It has been shown that ACA inhibited the development of azoxymethane-induced colon carcinogenesis through its suppression of cell proliferation in the colonic mucosa and its induction of glutathione S-transferase and quinone oxidoreductase 1 in vivo. In this study, we investigated how ACA induced these enzymes by using rat intestine epithelial cells (IEC6) in vitro. ACA induced glutathione S-transferase (GST) and NAD (P) H: quinone oxidoreductase 1 (NQO1) activities, increased intracellular glutathione (GSH) level, and upregulated intranuclear Nrf2 and cytosolic p21. It suggested that activation of phase II enzymes via Nrf2 associated with p21 is one of possible mechanisms of ACA to prevent advance of carcinogenesis.

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