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A gene trap approach to identify genes that control development

T Takeuchi1

  • 1Mitsubishi Kasei Institute of Life Sciences, Machida, Tokyo, Japan.

Development, Growth & Differentiation
|April 1, 1997
PubMed
Summary

Improved gene trap methods identified a novel gene essential for mouse development. This led to the jumonji mutant mouse, revealing new insights into neural development and gene discovery.

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Area of Science:

  • Developmental Biology
  • Genetics
  • Molecular Biology

Background:

  • Gene trap methodology is a powerful tool for identifying genes controlling developmental events.
  • Previous applications primarily identified known genes or homologs, limiting discovery of novel genes.

Purpose of the Study:

  • To enhance the efficiency of the gene trap methodology for discovering novel murine genes.
  • To characterize a novel mutant mouse strain generated through this improved method.

Main Methods:

  • Utilized an improved gene trap strategy to capture and identify murine genes.
  • Generated and analyzed a novel mutant mouse strain, 'jumonji', with a mixed genetic background (129/Ola and BALB/c).

Main Results:

  • Homozygous jumonji mutant embryos exhibited in utero lethality.
  • A significant proportion of homozygotes displayed abnormal neural plate groove formation and neural tube closure defects.
  • The trapped gene encodes a novel nuclear protein implicated in these developmental defects.

Conclusions:

  • The enhanced gene trap approach successfully identified a novel gene crucial for murine development.
  • The jumonji mutation highlights the gene trap strategy's potential for uncovering previously unknown developmental genes.
  • Addressing challenges in prescreening embryonic stem cells is key to maximizing the utility of this technique.

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