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Germ line chimeras from female ES cells

A K Voss1, T Thomas, P Gruss

  • 1Department of Molecular Cell Biology, Max-Planck Institute of Biophysical Chemistry, Goettingen, Germany. avoss@gwdg.de

Experimental Cell Research
|January 10, 1997
PubMed
Summary

Female embryonic stem cells (ES cells) can now contribute to the germ line, enabling the creation of new mouse models. This breakthrough allows for genetic studies previously limited by male-only ES cell lines.

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Area of Science:

  • Developmental Biology
  • Genetics
  • Stem Cell Biology

Background:

  • Murine embryonic stem cells (ES cells) are pluripotent and can contribute to all tissues, including the germ line, for creating mutant mouse lines.
  • Previously, only male ES cell lines capable of germ line contribution were available.
  • Female ES cells are crucial for studying X-chromosome gene mutations that are lethal in male hemizygotes.

Purpose of the Study:

  • To demonstrate the germ line contribution of female ES cells.
  • To establish the utility of female ES cells for genetic studies, particularly for X-linked genes.
  • To show that female ES cells can modify the sex of a host embryo.

Main Methods:

  • Aggregation of female ES cells with 8-cell-stage embryos.
  • Injection of female ES cells into the blastocoel cavity of murine blastocysts.
  • Analysis of chimerism and germ line contribution in resulting offspring.

Main Results:

  • Female ES cells successfully formed germ line chimeras.
  • The study demonstrated the ability of female ES cells to 'sex convert' a male host embryo.
  • This confirms the pluripotency and germ line potential of female ES cells.

Conclusions:

  • Female ES cells are capable of contributing to the germ line, expanding their use in genetic research.
  • The development of female ES cell lines overcomes limitations in studying X-linked genes.
  • These findings open new avenues for generating genetically modified mouse models.

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