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Indole-3-carbinol Inhibits Lipid Peroxidation in Cell-Free Systems

  • Howard G. Shertzer
  • Michael P. Niemi
  • M. Wilson Tabor
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 197)

Summary

Free radicals mediate toxicological and carcinogenic responses of tissues to many chemicals. Cellular defenses against radical mediated damage utilize endogenous substances such as tocopherol, ascorbate and GSH.Here we report a new antioxidant, indole-3-carbinol (I-3-C), a natural constituent of human diet.In chlorobenzene containing soy phospholipids, lipid oxidation was initiated with azobisisobutyronitrile; I-3-C inhibited formation of thiobarbituric acid-reactive material in a dose-dependent manner. Similar results were obtained in an aqueous system containing phospholipid vesicles initiated by Fe/ascorbate. For both systems I-3-C was less effective than tocopherol or BHT as antioxidant. To assess these antioxidant effects in vivo, mice were treated with I-3-C by gavage. A hepatic post-mitochondrial supernatant fraction isolated 2 hours after treatment showed dose-dependent decreases in NADPH-mediated lipid oxidation which correlated with decreases in 14C-nitrosodimethylamine covalent binding to protein. Although hepato-toxicity may not involve lipid oxidation per se, it does indicate that free radical damage had occurred. Inhibition of damage by I-3-C suggests that this dietary component has the potential to ameliorate radical mediated chemical toxicity.

Keywords

Lipid Peroxidation Lipid Oxidation Phospholipid Vesicle Ascorbate Concentration Inhibit Lipid Oxidation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • Howard G. Shertzer
    • 1
  • Michael P. Niemi
    • 1
  • M. Wilson Tabor
    • 1
  1. 1.Kettering Laboratory Department of Environmental HealthUniversity of Cincinnati Medical CenterCincinnatiUSA

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