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X-ray-induced mutations in mouse embryonic stem cells

J W Thomas1, C LaMantia, T Magnuson

  • 1Department of Genetics, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106-4955, USA.

Proceedings of the National Academy of Sciences of the United States of America
|March 14, 1998
PubMed
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This study demonstrates a new method for creating deletion complexes in mouse embryonic stem cells using X-ray and UV mutagenesis. This approach enables functional analysis of large genomic regions and identifies potential haploinsufficient regions.

Area of Science:

  • Genetics
  • Genomics
  • Molecular Biology

Background:

  • Deletion complexes are valuable for analyzing large genomic regions in model organisms.
  • A robust method for generating and mapping deletions in mice is needed for functional genomics.

Purpose of the Study:

  • To develop and validate a strategy for generating and mapping deletion complexes in mouse embryonic stem cells.
  • To assess the feasibility of using X-ray and UV mutagenesis for this purpose.

Main Methods:

  • Established a polymorphic mouse embryonic stem cell line.
  • Induced mutagenesis using X-ray and UV radiation.
  • Performed cytogenetic and molecular analyses, including PCR-based microsatellite markers and fluorescence in situ hybridization.

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Main Results:

  • Successfully generated deletion complexes at the Hprt and Ncam loci.
  • Identified deletions ranging from <3 cM at Hprt to >28 cM at Ncam.
  • Observed complex chromosome rearrangements associated with some Ncam deletions and identified a putative haploinsufficient region.

Conclusions:

  • X-ray and UV mutagenesis are feasible methods for generating deletion complexes in mouse embryonic stem cells.
  • This strategy allows for high-resolution deletion mapping and functional genomic analysis.
  • The method can reveal complex chromosomal alterations and identify regions with haploinsufficiency.