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Related Experiment Videos

Brain selenium status and behavioral development in selenium-deficient preweanling mice

C Watanabe1, H Satoh

  • 1Department of Environmental Health Sciences, Tohoku University School of Medicine, Sendai, Japan.

Physiology & Behavior
|November 1, 1994
PubMed
Summary

Selenium deficiency in pregnant mice impacts offspring behavior and motor skills. Se-deficient pups showed altered thermoregulation and delayed walking, indicating developmental neurotoxicity.

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Area of Science:

  • Nutritional Neuroscience
  • Developmental Biology
  • Toxicology

Background:

  • Selenium (Se) is an essential trace element crucial for various physiological functions, including brain development and antioxidant defense.
  • Maternal Se status during gestation and lactation can significantly influence offspring health and neurodevelopment.
  • Understanding the impact of Se deficiency on early-life behavioral development is vital for public health and nutritional guidelines.

Purpose of the Study:

  • To investigate the effects of maternal selenium deficiency on the behavioral development of preweanling mice offspring.
  • To assess tissue-specific selenium levels in the liver and brain of offspring exposed to Se deficiency in utero and during lactation.
  • To evaluate specific behavioral changes, including thermoregulation and motor skill development, in Se-deficient offspring.

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Main Methods:

  • Female ICR mice were fed either a Se-deficient (< 20 ng Se/g diet) or control (400 ng Se/g diet) diet from 4 weeks before conception through the suckling period.
  • Selenium concentrations in the liver and brain of offspring were measured at the third postnatal day and at weaning.
  • Offspring behavior was assessed using a thermogradient to evaluate thermoregulatory preference and by observing the development of walking ability.

Main Results:

  • Se-deficient offspring exhibited significantly reduced liver and brain Se levels compared to controls, with liver Se levels being disproportionately lower.
  • Tissue-specific Se metabolism was evident, with brain Se exceeding hepatic Se in deficient offspring at weaning, unlike controls.
  • Se-deficient offspring showed a preference for warmer environments and exhibited slightly retarded walking ability development.

Conclusions:

  • Maternal selenium deficiency during critical developmental periods alters offspring behavioral development, including thermoregulation and motor function.
  • The findings highlight the importance of adequate maternal selenium intake for normal neurodevelopment and behavioral outcomes in offspring.
  • Tissue-specific selenium distribution and metabolism are established early in life, influencing developmental trajectories.