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Related Experiment Videos

Imprinted X inactivation maintained by a mouse Polycomb group gene.

J Wang1, J Mager, Y Chen

  • 1Department of Genetics, CB 7264, The University of North Carolina, 102 Mason Farm Road, Chapel Hill, North Carolina 27599-7264, USA.

Nature Genetics
|August 2, 2001
PubMed
Summary

The gene eed is crucial for maintaining imprinted X inactivation in extra-embryonic tissues, ensuring proper development by regulating the paternal X chromosome. This process involves histone deacetylase interactions and hypoacetylation.

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Area of Science:

  • Genetics
  • Developmental Biology
  • Epigenetics

Background:

  • Mammalian dosage compensation involves X chromosome inactivation.
  • X inactivation is typically random in embryos but imprinted in marsupials and mouse extra-embryonic tissues, where the paternal X is silenced.
  • Excessive active X chromosomes are detrimental to extra-embryonic development.

Purpose of the Study:

  • To investigate the role of the eed gene in extra-embryonic development and imprinted X inactivation.
  • To determine if eed is essential for trophoblast giant cell development in female mice.

Main Methods:

  • Utilized mouse models with paternally inherited X-linked green fluorescent protein (GFP) transgenes.
  • Examined the function of the eed gene, a member of the mouse Polycomb group (Pc-G) genes.

Related Experiment Videos

  • Investigated the interaction of Eed protein with histone deacetylases.

    • Main Results:

    • The gene eed is essential for the development of primary and secondary trophoblast giant cells in female embryos.
    • Results indicate that eed plays a role in the stable maintenance of imprinted X inactivation in extra-embryonic tissues.
    • The Eed protein's interaction with histone deacetylases suggests a mechanism involving hypoacetylation of the paternal X chromosome.

    Conclusions:

    • The gene eed is indispensable for extra-embryonic development and imprinted X inactivation maintenance.
    • Eed-mediated hypoacetylation of the paternal X chromosome is likely critical for its stable silencing in extra-embryonic tissues.
    • This study sheds light on the epigenetic mechanisms governing X chromosome dosage compensation in mammalian development.