Abstract
Mice with targeted genetic alterations are the most effective tools for deciphering organismal gene function. We generated an ENU-based parallel C3HeB/FeJ sperm and DNA archive characterized by a high probability to identify allelic variants of target genes as well as high efficiencies in allele retrieval and model revitalization. Our archive size of over 17,000 samples contains approximately 340,000 independent alleles (20 functional mutations per individual sample). Based on an estimated number of approximately 30,000 mouse genes, the parallel sperm/DNA archive should permit the identification and recovery of ten or more alleles per average target gene which translates to a calculated 99% success rate in the discovery of five allelic variants for any given average gene. The low rate of unrelated ENU-induced passenger mutations has no practical impact on the analysis of the allele-specific phenotype at the G3 generation because of dilution and free segregation of such unrelated passenger mutations. To date 39 mouse models representing 33 different genes have been recovered from our archive using in vitro fertilization techniques. The generation time for a murine model heterozygous for a mutation in a gene of interest is less than 2 months, i.e., three to four times faster compared with current embryonic stem-cell–based technologies. We conclude that ENU-based targeted mutagenesis is a powerful tool for the fast and high-throughput production of murine gene-specific models for biomedical research.
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M. Augustin and R. Sedlmeier contributed equally to this work.
M. Nehls and S. Wattler are Co-senior authors.
TGCE, temperature gradient capillary electrophoresis; ENU, N-ethyl-N-nitrosurea; SNP, single nucleotide polymorphism; IVF, in vitro fertilization
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Augustin, M., Sedlmeier, R., Peters, T. et al. Efficient and fast targeted production of murine models based on ENU mutagenesis. Mamm Genome 16, 405–413 (2005). https://doi.org/10.1007/s00335-004-3028-2
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DOI: https://doi.org/10.1007/s00335-004-3028-2