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Abstract Title:

Protective effects of Asian green vegetables against oxidant induced cytotoxicity.

Abstract Source:

World J Gastroenterol. 2005 Dec 28;11(48):7607-14. PMID: 16437686

Abstract Author(s):

Peter Rose, Choon Nam Ong, Matt Whiteman

Article Affiliation:

Department of Biochemistry, National University of Singapore, 8 Medical Drive, 117597 Singapore. bchpcr@nus.edu.sg

Abstract:

AIM: To evaluate the antioxidant and phase II detoxification enzyme inducing ability of green leaf vegetables consumed in Asia. METHODS: The antioxidant properties of six commonly consumed Asian vegetables were determined using the ABTS, DPPH, deoxyribose, PR bleaching and iron- ascorbate induced lipid peroxidation assay. Induce of phase II detoxification enzymes was also determined for each respective vegetable extract. Protection against authentic ONOO- and HOCl mediated cytotoxicity in human colon HCT116 cells was determined using the MTT 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrasodium bromide) viability assay. RESULTS: All of the extracts derived from green leaf vegetables exhibited antioxidant properties, while also having cytoprotective effects against ONOO- and HOCl mediated cytotoxicity. In addition, evaluation of the phase II enzyme inducing ability of each extract, as assessed by quinone reductase and glutathione-S-transferase activities, showed significant variation between the vegetables analyzed. CONCLUSION: Green leaf vegetables are potential sources of antioxidants and phase II detoxification enzyme inducers in the Asian diet. It is likely that consumption of such vegetables is a major source of beneficial phytochemical constituents that may protect against colonic damage.

Study Type : In Vitro Study

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Sayer Ji
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