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Methylmercury toxicity and functional programming.

Philippe Grandjean1

  • 1Department of Environmental Health, Harvard School of Public Health, Landmark Center, 3-110E, 401 Park Drive, Boston, MA 02215, USA. pgrandjean@health.sdu.dk

Reproductive Toxicology (Elmsford, N.Y.)
|April 6, 2007
PubMed
Summary

Developmental toxicants like methylmercury can cause lasting functional deficits through abnormal programming. Even low exposures may lead to permanent neurodevelopmental effects, influenced by nutrient interactions.

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Area of Science:

  • Environmental Health
  • Neuroscience
  • Toxicology

Background:

  • Developmental toxicants can cause abnormal functional programming, leading to persistent deficits.
  • Methylmercury (MeHg) neurotoxicity serves as a key example in developmental toxicology.
  • Epidemiological evidence is crucial for understanding these effects.

Purpose of the Study:

  • To examine the concept of abnormal functional programming induced by developmental toxicants.
  • To use developmental methylmercury neurotoxicity as a model to illustrate this concept.
  • To analyze epidemiological evidence related to methylmercury's impact on neurodevelopment.

Main Methods:

  • Epidemiological study design.
  • Analysis of neurobehavioral outcomes.

Related Experiment Videos

  • Assessment of methylmercury exposure levels.
  • Consideration of confounding factors, including essential nutrients.

    • Main Results:

    • Low-level methylmercury exposure from fish can cause adverse health effects.
    • Neurobehavioral outcomes are often non-specific, and exposure assessment can be imprecise.
    • Prenatal methylmercury exposure may lead to permanent functional deficits, potentially modulated by nutrient co-exposure.

    Conclusions:

    • Lasting functional changes from neurodevelopmental methylmercury toxicity align with functional programming principles.
    • These effects are opposite to those induced by beneficial developmental stimuli.
    • The study highlights the permanent nature of methylmercury-induced neurodevelopmental deficits.