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Abstract Title:

Induction of detoxifying enzyme by sesquiterpenes present in Inula helenium.

Abstract Source:

J Med Food. 2007 Sep;10(3):503-10. PMID: 17887945

Abstract Author(s):

Soon Sung Lim, Sun Seong Im, Ju Ryoung Kim, Hyun Ae Lim, Chan Ho Jang, Young Kyoon Kim, T Konishi, Eun Ji Kim, Jung Han Yoon Park, Jong-Sang Kim

Abstract:

Full Citation: "Our previous study showed that the methanolic extract of Inula helenium (elecampane) had the potential to induce detoxifying enzymes such as quinine reductase (QR) and glutathione S-transferase. In this study we further fractionated the methanolic extract into hexane-, dichloromethane-, butanol-, and water-soluble fractions according to polarity. The hexane fraction showed the highest QR-inducing activity and also induced glutathione S-transferase in a dose-dependent manner. Its potential to induce the reporter activity suggested an antioxidant response element-mediated mechanism of action in the induction of phase II detoxifying enzymes. Intraperitoneal injection of the hexane fraction of I. helenium into ICR mice caused a significant increase of QR activity in liver, kidney, small intestine, and stomach. Sesquiterpenes, isolated from the hexane fraction, appeared to be major components responsible for QR induction. Among the seven compounds tested in this study, alantolactone, isoalantolactone, and 5alpha-epoxyalantolactone significantly induced QR activity in both Hepa1c1c7 and BPRc1 cells. In conclusion, sesquiterpenes, including alantolactone, isoalantolactone and 5-epoxyalantolactone, present in I. helenium merit further evaluation as chemopreventive agents.."

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Sayer Ji
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