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The loss of the H 2 O 2 scavenger protein encoded by Prdx1 in mice leads to an elevation of reactive oxygen species (ROS) and tumorigenesis of different tissues. Loss of heterozygosity (LOH) mutations could initiate tumorigenesis through loss of tumor suppressor gene function in heterozygous somatic cells. A connection between the severity of ROS and the frequency of LOH mutations...
Maintenance of genomic integrity in embryonic cells is pivotal to proper embryogenesis, organogenesis and to the continuity of species. Cultured mouse embryonic stem cells (mESCs), a model for early embryonic cells, differ from cultured somatic cells in their capacity to remodel chromatin, in their repertoire of DNA repair enzymes, and in the regulation of cell cycle checkpoints. Using 129XC3HF1 mESCs...
Mismatch repair (MMR) is critical for preserving genomic integrity. Failure of this system can accelerate somatic mutation and increase the risk of developing cancer. MSH6, in complex with MSH2, is the MMR protein that mediates DNA repair through the recognition of 1- and 2-bp mismatches. To evaluate the effects of MSH6 deficiency on genomic stability we compared the frequency of in vivo loss of heterozygosity...
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