Cited by 17CRISPR and Genetic EngineeringDNA Repair MechanismsAnimal Genetics and Reproduction

A LacZ-based transgenic mouse for detection of somatic gene repair events in vivo

Nickerson, H D, Colledge, W H·2004·Gene Therapy

Abstract

Somatic gene repair of disease-causing chromosomal mutations is a novel approach for gene therapy. This method would ensure that the corrected gene is regulated by its endogenous promoter and expressed at physiological levels in the appropriate cell types. A reporter mouse, Gtrosa26(tm1Col), was generated by targeting a mutated LacZ gene to the Rosa26 locus in mouse embryonic stem (ES) cells. The LacZ gene contains a G to A point mutation, resulting in a Glu to Lys amino-acid substitution at position 461, which abrogates enzymatic activity. The gene is expressed in ES cells, primary embryonic fibroblasts, and in all tissues examined in the adult mouse, including the lung, liver, kidney, spleen, heart, brain and smooth muscle. This transgenic mouse will allow testing of gene repair strategies in vivo and identification of which cell types can be successfully targeted by chromosomal gene repair. Although low levels of gene repair were achieved in the ES cells used to generate the Gtrosa26(tm1Col) mouse, preliminary attempts at gene repair in vivo were unsuccessful, thus highlighting the difficulties that will have to be overcome to get this approach to work.

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  • Few publications exist demonstrating repair in vivo, and they are hindered by targeting clinically irrelevant marker mutations in exogenously provided transgenes like GFP or LacZ.

    “Few publications exist demonstrating repair in vivo,39,40 and they are hindered by the fact that they target clinically irrelevant marker mutations in exogenously provided transgenes like green fluorescent protein (GFP) or LacZ.”

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Authors
Nickerson, H. D., & Colledge, W. H.
Affiliations
University of Cambridge (GB)
Venue
Gene Therapy
Published
2004-07-01
Volume
11
Issue
17
Pages
1351-1357
ISSN
  • 0969-7128 (ISSN-L)
  • 1476-5462
OpenAlex
W1969405745
Cited by
17
References
36
Citations by year
2025: 1 · 2024: 1 · 2022: 2 · 2021: 1 · 2015: 1 · 2012: 2
FWCI
0.71
Type
journal article
Language
en
Open access
closed
Locations
  • Gene Therapy (publishedVersion)
  • PubMed (publishedVersion)
Funders
Medical Research Council
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Animal Genetics and Reproduction
Keywords
chromosomal mutations, Rosa26 locus, point mutations, transgenic mice, embryonic stem cells, tissue-specific gene expression
MeSH terms
Animals, beta-Galactosidase, Cells, Cultured, Lac Operon, Liver, Mice, Transgenic, Stem Cells, Transfection, Blotting, Western, Genetic Therapy, Gene Expression, Electroporation, Gene Targeting, Models, Animal, Mice

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