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Epigenetic inheritance in the mouse

I Roemer1, W Reik, W Dean

  • 1Institut für Humangenetik, Humboldt Universität, D-14195, Berlin, Germany.

Current Biology : CB
|April 1, 1997
PubMed
Summary
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Acquired epigenetic changes in mammals are not typically inherited. This study demonstrates that experimentally induced epigenetic modifications in mice can be passed to offspring, establishing a model for transgenerational epigenetic inheritance.

Area of Science:

  • Epigenetics
  • Developmental Biology
  • Mammalian Genetics

Background:

  • Acquired epigenetic modifications (e.g., DNA methylation) are generally not inherited across generations in mammals.
  • Previous studies showed that manipulating early embryos in mice can alter gene expression and induce phenotypes.

Purpose of the Study:

  • To investigate the potential for transgenerational inheritance of experimentally induced epigenetic modifications in mammals.
  • To establish a mammalian model for studying transgenerational epigenetic effects relevant to human health.

Main Methods:

  • Nuclear transplantation in early mouse embryos to induce specific epigenetic changes.
  • Observation and analysis of phenotypic alterations and gene expression patterns in subsequent generations.

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Main Results:

  • Experimentally induced phenotypes, including gene repression and reduced body weight, were transmitted to most offspring of manipulated parent mice.
  • This represents the first demonstration of epigenetic inheritance of specific gene expression alterations through the mammalian germline.

Conclusions:

  • Mammalian epigenetic inheritance of acquired traits is possible.
  • These findings provide a model for studying transgenerational effects with implications for human health and evolution.