In this study, mice expressing one of the two Mre11 alleles inherited in the human ataxia-telangiectasia like disorder (A-TLD) were derived. The mutation had a profound maternal effect on embryonic viability, revealing an acute requirement for Mre11 complex function in early embryogenesis. Mre11(ATLD1/ATLD1) mice exhibited several indices of impaired ATM function. The mice also exhibited pronounced chromosomal instability. Despite this phenotypic spectrum, the animals were not prone to malignancy. These data indicate that defective cell cycle checkpoints and chromosomal instability are insufficient to significantly enhance the initiation of tumorigenesis. In contrast, the latency of malignancy in p53(+/-) mice was dramatically reduced. We propose that in Mre11(ATLD1/ATLD1) mice, genome instability and cell cycle checkpoint defects reduce viability in early embryos and in proliferating cells, while promoting malignancy in the context of an initiating lesion.
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 04 November 2014.
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#9,515,460
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#41,407
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Outputs of similar age from Molecular Cell
#31
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