Cited by 951DNA Repair MechanismsDevelopmental Biology and Gene RegulationCancer-related Molecular Pathways

ATR disruption leads to chromosomal fragmentation and early embryonic lethality

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Brown, Eric J., Baltimore, David·2000·Genes & Development

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.

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Crossref · 10.1101/gad.14.4.397

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Authors
Brown, E. J., & Baltimore, D.
Affiliations
California Institute of Technology (US)
Venue
Genes & Development
Published
2000-02-15
Volume
14
Issue
4
Pages
397-402
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2167196101
Cited by
951
References
38
Citations by year
2026: 12 · 2025: 18 · 2024: 24 · 2023: 29 · 2022: 26 · 2021: 26 · 2020: 31 · 2019: 27 · 2018: 30 · 2017: 38 · 2016: 39 · 2015: 46 · 2014: 31 · 2013: 46 · 2012: 34
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion, cc-by)
Funders
Cancer Research Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
ATR kinase, early embryonic lethality, chromosomal fragmentation, caspase-dependent apoptosis, blastocyst, genome stability, p53-independent function, mitotic cycle
MeSH terms
Animals, Blastocyst, Cell Transformation, Neoplastic, Chromosome Aberrations, DNA Repair, Fetal Death, Genotype, Mice, Inbred C57BL, Mitosis, Neoplasm Proteins, Neoplasms, Experimental, Transcription Factors, Apoptosis, Protein Serine-Threonine Kinases, Mice, Knockout, Gene Targeting, Gene Expression Regulation, Developmental, Cell Cycle Proteins, BRCA1 Protein, Caspases, BRCA2 Protein, Mice, Ataxia Telangiectasia Mutated Proteins

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