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Maternal zinc supplementation improves spatial memory in rat pups.

Agnieszka Piechal1, Kamilla Blecharz-Klin, Justyna Pyrzanowska

  • 1Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Warsaw, Poland. piechal@hotmail.com

Biological Trace Element Research
|January 18, 2012
PubMed
Summary

Maternal zinc sulfate (ZnSO(4)) supplementation during pregnancy and lactation improved cognitive development and memory in rat pups. This dietary intervention enhanced brain function, highlighting zinc

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Nutritional Science

Background:

  • Adequate dietary zinc is crucial for prenatal and postnatal brain development.
  • Maternal nutrition significantly impacts offspring neurodevelopment and cognitive function.
  • Zinc deficiency can impair brain maturation and cognitive performance.

Purpose of the Study:

  • To investigate the behavioral effects of maternal zinc sulfate (ZnSO(4)) supplementation on rat pup development.
  • To assess the impact of prenatal and postnatal zinc intake on cognitive functions, including memory and learning.
  • To determine the correlation between serum and brain zinc levels and cognitive performance in offspring.

Main Methods:

  • Wistar female rats received ZnSO(4) at 16 mg/kg or 32 mg/kg during pregnancy and lactation.

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  • Behavioral assessments (Morris water task, hole board, T-maze) were performed on 4-week-old male rat pups.
  • Zinc concentrations in serum, hippocampus, and prefrontal cortex were measured using atomic absorption spectroscopy.

    • Main Results:

    • Maternal ZnSO(4) supplementation significantly improved memory in the Morris water task probe trial.
    • Increased climbing behavior was observed in the lower-dose ZnSO(4) group during the hole board test.
    • ZnSO(4) treatment elevated serum zinc levels and showed correlations between hippocampal zinc and cognitive performance.

    Conclusions:

    • Prenatal and postnatal zinc supplementation can enhance cognitive development and memory in rats.
    • Maternal zinc intake influences offspring brain zinc levels and associated cognitive functions.
    • Dietary zinc is essential for optimal neurodevelopment and cognitive performance.