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Manifestations of copper excess

I Bremner1

  • 1Rowett Research Institute, Bucksburn, Aberdeen, United Kingdom. I.Bremner@rri.sari.ac.uk

The American Journal of Clinical Nutrition
|May 20, 1998
PubMed
Summary

Excess dietary copper can be toxic, with susceptibility varying by species, genetics, age, and diet. Copper toxicity mechanisms involve free radical generation, impacting cell membranes and DNA.

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Area of Science:

  • Biochemistry
  • Toxicology
  • Nutritional Science

Background:

  • Copper is an essential micronutrient vital for numerous biological processes.
  • Effective homeostatic control typically prevents copper toxicity.
  • However, excessive dietary copper intake can lead to toxicosis under certain conditions.

Purpose of the Study:

  • To explore the factors influencing susceptibility to copper toxicosis.
  • To elucidate the mechanisms underlying copper-induced cellular damage.
  • To understand the role of copper in generating oxygen free radicals.

Main Methods:

  • Review of existing literature on copper metabolism and toxicity.
  • Analysis of species-specific differences in copper absorption and excretion.
  • Investigation of dietary factors and genetic predispositions affecting copper toxicosis.
  • Examination of cellular copper distribution and protein expression.
  • Assessment of copper's role in oxidative stress and DNA damage.

Main Results:

  • Susceptibility to copper toxicosis is multifactorial, influenced by species, genetics, age, and diet.
  • Variations in copper absorption, excretion, and protein expression contribute to differential toxicity.
  • Hepatotoxic and protective dietary factors play a significant role.
  • Copper-mediated generation of oxygen free radicals is a key mechanism of toxicity.
  • Observed toxic effects include lipid peroxidation and DNA damage.

Conclusions:

  • Copper's essential role is contrasted by its potential toxicity at excess levels.
  • Individual and environmental factors significantly modulate copper toxicosis risk.
  • Understanding these factors is crucial for preventing and managing copper-related health issues.
  • Copper-induced oxidative stress is a primary driver of cellular damage.

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