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Related Experiment Videos

Reversible and persistent consequences of copper deficiency in developing mice.

D S Arce1, C L Keen

  • 1Biochemical Research and Development, Miles Inc, Berkeley, CA 94701.

Reproductive Toxicology (Elmsford, N.Y.)
|January 1, 1992
PubMed
Summary

Maternal copper deficiency causes lasting changes in offspring proteins, affecting responses to oxidative stress. These copper-induced alterations persist even after nutritional repletion.

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Area of Science:

  • Biochemistry
  • Developmental Biology
  • Nutritional Science

Background:

  • Maternal nutrition significantly impacts offspring development.
  • Copper (Cu) is an essential trace element crucial for various physiological processes.
  • Understanding the long-term effects of copper deficiency is vital for developmental health.

Purpose of the Study:

  • To investigate the reversibility of copper deficiency-induced protein alterations in offspring.
  • To assess the functional consequences of these changes under oxidative stress.
  • To determine the impact of early copper deficiency on specific biomarkers.

Main Methods:

  • Mice were fed control or low copper diets throughout gestation and lactation.
  • Offspring were assessed at day 18 or day 42 after copper repletion.

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  • Animals were exposed to endotoxin-induced oxidative stress or saline control.
  • Key biochemical markers, including protein levels and enzyme activities, were measured.

    • Main Results:

    • Copper deficiency decreased hematocrit, ceruloplasmin, tissue copper, and metallothionein levels.
    • Copper repletion normalized most parameters except metallothionein.
    • Offspring with early copper deficiency showed altered brain superoxide dismutase activity and increased oxidative stress markers (TBARS) post-endotoxin.
    • Liver oxidative stress markers were lower in deficient offspring.

    Conclusions:

    • Copper deficiency during early development induces persistent alterations in protein expression and function.
    • These changes impact the offspring's response to oxidative stress.
    • Nutritional repletion does not fully reverse all effects of early-life copper deficiency.