Research Strategies in the Study of the Pro-oxidant Nature of Polyphenol Nutraceuticals

Overview

Journal J Toxicol

Publisher Wiley

Specialty Toxicology

Date 2011 Jul 22

PMID 21776260

Citations 34

Authors

Harvey Babich

Alyssa G Schuck

Jeffrey H Weisburg

Harriet L Zuckerbraun

Affiliations

Soon will be listed here.

Abstract

Polyphenols of phytochemicals are thought to exhibit chemopreventive effects against cancer. These plant-derived antioxidant polyphenols have a dual nature, also acting as pro-oxidants, generating reactive oxygen species (ROS), and causing oxidative stress. When studying the overall cytotoxicity of polyphenols, research strategies need to distinguish the cytotoxic component derived from the polyphenol per se from that derived from the generated ROS. Such strategies include (a) identifying hallmarks of oxidative damage, such as depletion of intracellular glutathione and lipid peroxidation, (b) classical manipulations, such as polyphenol exposures in the absence and presence of antioxidant enzymes (i.e., catalase and superoxide dismutase) and of antioxidants (e.g., glutathione and N-acetylcysteine) and cotreatments with glutathione depleters, and (c) more recent manipulations, such as divalent cobalt and pyruvate to scavenge ROS. Attention also must be directed to the influence of iron and copper ions and to the level of polyphenols, which mediate oxidative stress.

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