Telomere Dysfunction Triggers Developmentally Regulated Germ Cell Apoptosis
Open accessAbstract
Telomere dysfunction results in fertility defects in a number of organisms. Although data from fission yeast and Caenorhabditis elegans suggests that telomere dysfunction manifests itself primarily as defects in proper meiotic chromosome segregation, it is unclear how mammalian telomere dysfunction results in germ cell death. To investigate the specific effects of telomere dysfunction on mammalian germ cell development, we examined the meiotic progression and germ cell apoptosis in late generation telomerase null mice. Our results indicate that chromosome asynapsis and missegregation are not the cause of infertility in mice with shortened telomeres. Rather, telomere dysfunction is recognized at the onset of meiosis, and cells with telomeric defects are removed from the germ cell precursor pool. This germ cell telomere surveillance may be an important mechanism to protect against the transmission of dysfunctional telomeres and chromosomal abnormalities.
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The breeding strategy produced same-strain dystrophic mice lacking telomerase, which is critical because telomere length differs among mouse strains.
“This strategy yields same strain dystrophic mice that lack telomerase, which is critical, as telomere length differs among mouse strains (Hemann et al., 2001).”
From Short Telomeres and Stem Cell Exhaustion Model Duchenne Muscular Dystrophy in mdx/mTR Mice (2010) · cites this paper as Hemann et al., 2001
Signalling from short telomeres activates checkpoints that cause either senescence or apoptosis, and sometimes both at once.
“The consequent signalling cascades activate checkpoints that induce either cellular senescence or apoptosis, and in at least some contexts both processes occur simultaneously82,85,91,95.”
From The telomere syndromes (2012) · cites this paper as [95]
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References 42 · Cited by 162
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- Authors
- Hemann, M. T., Rudolph, K. L., Strong, M. A., DePinho, R. A., Chin, L., & Greider, C. W.
- Affiliations
- Johns Hopkins University (US)
- Harvard University (US)
- Venue
- Molecular Biology of the Cell
- Published
- 2001-07
- Volume
- 12
- Issue
- 7
- Pages
- 2023-2030
- ISSN
- 1059-1524 (ISSN-L)
- 1939-4586
- PMC
- PMC55650
- OpenAlex
- W2171818443
- Cited by
- 162
- References
- 42
- Citations by year
- 2026: 3 · 2023: 5 · 2022: 1 · 2021: 8 · 2020: 4 · 2019: 7 · 2018: 5 · 2017: 2 · 2016: 3 · 2015: 8 · 2014: 4 · 2013: 11 · 2012: 5
- FWCI
- 8.37
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Molecular Biology of the Cell (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Deutsche Forschungsgemeinschaft
- National Institutes of Health (5r01hd028317-05, 5r01hd034880-04, 5k08ar002104-04)
- National Cancer Institute (CA-16519, P01CA016519)
- National Institute of General Medical Sciences (T32GM007814, GM-07814)
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (K08-AR02104)
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD 28317, HD-34880)
- Topics
- Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
- Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
- Keywords
- telomere dysfunction, germ cell apoptosis, meiotic progression, germ cell development, fertility defects, meiotic chromosome segregation, chromosomal abnormalities
- MeSH terms
- Animals, Male, Meiosis, Phenotype, Spermatozoa, Telomere, Apoptosis, Mice
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