Published February 15, 2000
| Published
Journal Article
Open
ATR disruption leads to chromosomal fragmentation and early embryonic lethality
- Creators
- Brown, Eric J.
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Baltimore, David
Abstract
Although a small decrease in survival and increase in tumor incidence was observed in ATR^(+/−) mice, ATR^(−/−) embryos die early in development, subsequent to the blastocyst stage and prior to 7.5 days p.c. In culture, ATR^(−/−) blastocysts cells continue to cycle into mitosis for 2 days but subsequently fail to expand and die of caspase-dependent apoptosis. Importantly, caspase-independent chromosome breaks are observed in ATR^(−/−) cells prior to widespread apoptosis, implying that apoptosis is caused by a loss of genomic integrity. These data show that ATR is essential for early embryonic development and must function in processes other than regulation of p53.
Additional Information
© 2000 by Cold Spring Harbor Laboratory Press. Received November 16, 1999; revised version accepted January 10, 2000. We are indebted to M. Scott and J. Harrison for invaluable assistance in the generation of knockout cells and chimeric ATR^(+/−) mice. We also thank the following people for reagents, technical training, and helpful discussions: K. Cimprich, S. Schreiber, A. Koleske, C. Lois, J. Pomerantz, Y. Yamanashi, J. Baer, I. Stancovski, H. Chang, Y. Xu, S. Cherry, M. Meffert, and M. Porteus. We are grateful to P. Svec and L. Newman for laboratory assistance and L. Anonuevo, K. Owler, B. Kennedy, and S. Pease. E.J.B. was supported by a fellowship from the Cancer Research Institute. The publication costs of this article were defrayed in part by payment of page charges. This article must therefore be hereby marked "advertisement" in accordance with 18 USC section 1734 solely to indicate this fact.Attached Files
Published - Genes_Dev.-2000-Brown-397-402.pdf
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Genes_Dev.-2000-Brown-397-402.pdf
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Additional details
- PMCID
- PMC316378
- Eprint ID
- 103030
- Resolver ID
- CaltechAUTHORS:20200506-104739180
- Cancer Research Institute
- Created
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2020-05-06Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field