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Related Experiment Videos

Exchangeable gene trap using the Cre/mutated lox system.

K Araki1, T Imaizumi, T Sekimoto

  • 1Institute of Molecular Embryology and Genetics, Kumamoto University School of Medicine, Japan. yamamura@gpo.kumamoto-u.ac.jp

Cellular and Molecular Biology (Noisy-Le-Grand, France)
|October 8, 1999
PubMed
Summary

This study introduces exchangeable gene trapping, a novel method for mouse development research. It enables subtle gene mutations and efficient reporter gene replacement, overcoming limitations of traditional gene trapping.

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Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Genetics

Background:

  • Gene trapping is vital for studying mouse development but struggles with subtle mutations.
  • Existing methods lack the flexibility for precise genetic modifications.

Purpose of the Study:

  • To develop a new gene trap vector, pU-Hachi, for enhanced genetic manipulation in mice.
  • To enable subtle mutations and efficient gene replacement via a Cre-lox system.

Main Methods:

  • Constructed the pU-Hachi vector with a Cre-mutated lox system (lox71/lox66).
  • Utilized the vector for random insertional mutagenesis followed by Cre-mediated gene replacement.
  • Selected single-copy integration clones via Southern blotting.

Main Results:

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  • Successfully generated 109 trap clones using pU-Hachi.
  • Achieved high efficiency (20-80%) in reporter gene exchange.
  • Demonstrated utility for plasmid rescue of flanking genomic sequences.

Conclusions:

  • Exchangeable gene trapping offers a versatile approach for mouse genetics.
  • This method allows for the expression of genes with various mutations.
  • The system facilitates precise genetic characterization and manipulation.