Cited by 32Telomeres, Telomerase, and SenescenceDNA Repair MechanismsCancer-related Molecular Pathways

Telomere fusion to chromosome breaks reduces oncogenic translocations and tumour formation

Qi, Ling, Strong, Margaret A., Karim, Baktiar O., Huso, David L., Greider, Carol W.·2005·Nature Cell Biology

Abstract

Telomeres protect chromosome ends from fusion, degradation and recombination. Loss of telomere function has opposite effects on tumorigenesis: apoptosis, which inhibits tumour growth, and genomic instability, which accelerates tumour formation. Here we describe a new mechanism by which short telomeres inhibit tumorigenesis through interference with oncogenic translocations. In mice that are null for both ataxia-telangiectasia-mutated (Atm) and telomerase RNA (mTR), the first generation (G1) Atm-/- mTR-/- mice have a lower rate of tumour formation than Atm-/- mTR+/+ mice. These Atm-/- mTR-/- G1 tumours show no increase in either apoptosis or overall genomic instability. Strikingly, the tumours show a high fraction of translocations containing telomere signals at the translocation junctions. Translocations of the T-cell receptors on chromosome 14, which initiate tumorigenesis, were interrupted by fusion with telomeres. Telomere repeats were also detected at the translocation junctions in pre-malignant thymocytes. We propose that telomere fusion to DNA double-strand breaks competes with the generation of oncogenic translocations and thus reduces tumour formation.

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Crossref · 10.1038/ncb1276

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31 of 31 references verified0 citation errors · 0 not checkable

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  • Crosses of telomerase-deficient mice with tumour model mice show that critically short telomeres limit tumour formation when the p53 pathway is functional.

    “Crosses of telomerase-deficient mice with various tumour model mice have demonstrated that critically short telomeres limit tumour formation when the p53 pathway is functional51–55.”

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Authors
Qi, L., Strong, M. A., Karim, B. O., Huso, D. L., & Greider, C. W.
Affiliations
  • Salk Institute for Biological Studies (US)
  • Johns Hopkins University (US)
Corresponding author
Greider, Carol W.
Venue
Nature Cell Biology
Published
2005-06-19
Volume
7
Issue
7
Pages
706-711
ISSN
  • 1465-7392 (ISSN-L)
  • 1476-4679
OpenAlex
W2045420025
Cited by
32
References
31
Citations by year
2025: 2 · 2018: 2 · 2017: 1 · 2013: 1 · 2012: 6
FWCI
3.21
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Leukemia and Lymphoma Society
  • National Institutes of Health
  • National Cancer Institute (CA-16519, P01CA016519)
  • National Center for Research Resources (RR 07002, RR 00171, K26RR000171)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
telomere fusion, chromosome breakage, oncogenic translocation, carcinogenesis, telomere length, ATM kinase, telomerase RNA, DNA double-strand breaks, thymocytes, telomeric repeats, genomic instability, apoptosis
MeSH terms
Age Factors, Animals, B-Lymphocytes, Body Weight, Crosses, Genetic, DNA-Binding Proteins, Female, Genotype, Male, Models, Genetic, Neoplasm Transplantation, Neoplasms, Experimental, Translocation, Genetic, Gene Rearrangement, T-Lymphocyte, Survival Analysis, Lymphoma, T-Cell, Mice, SCID, Telomere, Apoptosis, Protein Serine-Threonine Kinases, In Situ Hybridization, Fluorescence, Mice, Knockout, Cell Cycle Proteins, Telomerase, Chromosome Breakage, Genes, T-Cell Receptor, Tumor Suppressor Proteins, Spectral Karyotyping, Genomic Instability, Cell Proliferation, Mice, Ataxia Telangiectasia Mutated Proteins

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