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Abstract Title:

The chemopreventive effects of Carpesium abrotanoides are mediated by induction of phase II detoxification enzymes and apoptosis in human colorectal cancer cells.

Abstract Source:

J Med Food. 2010 Feb;13(1):39-46. PMID: 20136434

Abstract Author(s):

Saet Byoul Lee, Kyungsu Kang, Hee Ju Lee, Ji Ho Yun, Eun Hye Jho, Chul Young Kim, Chu Won Nho

Article Affiliation:

Natural Products Research Center, Korea Institute of Science and Technology, Gangneung Institute , Gangneung, Gangwon-do, Republic of Korea.

Abstract:

Abstract Cancer chemoprevention is thought to occur either by blocking the initiation of or suppressing the promotion of carcinogenesis. Phase II detoxification enzymes are known to play important roles in cancer chemoprevention because they enhance cytoprotection through detoxification and elimination of activated carcinogens at tumor initiation. Apoptosis is one of the most important inhibitory targets for tumor promotion. In this study, we have investigated the cancer chemopreventive activity of the ethanolic extract of Carpesium abrotanoides (CAE). We found that CAE induced quinone reductase [also known as NAD(P)H:quinone oxidoreductase (NQO1)] activity, increased NQO1 mRNA and protein expression, and had a relatively high chemoprevention index (12.04). CAE also significantly activated the antioxidant response element through the nuclear accumulation of NF-E2-related factor 2 in HCT116. Interestingly, we also found that CAE induced apoptosis, as evidenced by the externalization of phosphatidylserine, increased sub-G(0)/G(1) content, chromatin condensation, poly(ADP-ribose) polymerase cleavage, and p53. These data suggest that the chemopreventive effects of C. abrotanoides can result from both the induction of phase II detoxification enzymes and from apoptosis. Thus, CAE could potentially be developed as a cancer chemopreventive agent for prevention or treatment of human cancers.

Study Type : In Vitro Study

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