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Enriched environment during development is protective against lead-induced neurotoxicity.

J S Schneider1, M H Lee, D W Anderson

  • 1Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, 1020 Locust Street, 521 JAH, Philadelphia, PA 19107, USA. jay.schneider@mail.tju.edu

Brain Research
|March 30, 2001
PubMed
Summary

Environmental factors significantly impact lead toxicity in developing brains. An impoverished environment worsened lead

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Area of Science:

  • Neuroscience
  • Environmental Health
  • Developmental Toxicology

Background:

  • Children from lower socioeconomic backgrounds face higher lead exposure risks and adverse outcomes.
  • The influence of environmental factors on lead's neurotoxic effects, particularly during development, is not well understood.

Purpose of the Study:

  • To investigate how different environmental conditions modify the neurotoxic effects of lead exposure in a developing brain.
  • To examine the impact of enriched versus impoverished environments on lead-induced behavioral and neurochemical changes.

Main Methods:

  • Utilized an animal model (young rats) to study lead poisoning.
  • Rats were housed in either enriched or impoverished environments.
  • Exposure groups received either distilled water or water containing lead.

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Main Results:

  • Lead-exposed rats in impoverished environments exhibited spatial learning deficits and reduced hippocampal neurotrophic factor gene expression.
  • Rats in enriched environments showed significant protection against lead's behavioral and neurochemical toxicity.
  • Environmental milieu critically modulated lead's impact on the developing brain.

Conclusions:

  • Impoverished environments can exacerbate neurobehavioral and neurochemical toxicity from developmental lead exposure.
  • Enriched environments offer protection against the detrimental effects of lead exposure during brain development.
  • Environmental enrichment may serve as a protective factor against neurodevelopmental lead toxicity.