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Neo-Lamarckian medicine.

Root Gorelick1

  • 1School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA. cycad@asu.edu

Medical Hypotheses
|February 14, 2004
PubMed
Summary

Darwinian medicine traditionally views traits as gene-determined. Neo-Lamarckian medicine explores how environmental factors can epigenetically alter traits, impacting future generations and disease prevention.

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Area of Science:

  • Evolutionary Medicine
  • Epigenetics
  • Genetics

Background:

  • Darwinian medicine assumes traits are solely gene-determined, with environmental influences often seen as statistical noise.
  • This perspective overlooks the role of epigenetic signals, which can be altered by environmental factors and inherited.
  • Environmentally-induced epigenetic changes offer a mechanism for genotype-by-environment interactions.

Purpose of the Study:

  • To introduce Neo-Lamarckian medicine, which applies evolutionary epigenetics to disease.
  • To highlight the potential public health and environmental policy implications of heritable epigenetic alterations.
  • To challenge the traditional nature versus nurture dichotomy in evolutionary medicine.

Main Methods:

  • Examination of environmentally-alterable, meiotically-heritable epigenetic signals.
  • Analysis of how parental environment can affect descendants through epigenetic modifications.
  • Investigation of epigenetic mechanisms, such as cytosine methylation, in disease development.

Main Results:

  • Environmentally-induced epigenetic changes can be transmitted across generations, even without direct exposure to the initial environmental trigger.
  • These epigenetic alterations can underlie various diseases, including cancer, diabetes, and Prader-Willi syndrome.
  • Industrial contaminants and environmental shocks can lead to adverse epigenetic modifications with long-term consequences.

Conclusions:

  • Neo-Lamarckian medicine suggests that environmental insults can cause heritable harm, necessitating a shift from cure to prevention.
  • The widespread impact of environmentally-altered epigenetic effects could reshape our understanding of evolution and disease.
  • Understanding these mechanisms is crucial for effective public health and environmental policies.

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