Telomere dysfunction triggers developmentally regulated germ cell apoptosis
Embargo until
Date
2001-07
Journal Title
Journal ISSN
Volume Title
Publisher
American Society for Cell Biology
Abstract
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.
Description
Keywords
Telomere/physiology, Spermatozoa/cytology, Meiosis/physiology, Apoptosis
Citation
Hemann, Michael T. et al. "Telomere dysfunction triggers developmentally regulated germ cell apoptosis" Molecular Biology of the Cell 12 (2023-2030) (2001 July). Original article available at: http://www.molbiolcell.org/cgi/content/abstract/12/7/2023?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&author1=Greider%2C+C&andorexacttitle=and&andorexacttitleabs=and&andorexactfulltext=and&searchid=1&FIRSTINDEX=0&sortspec=relevance&resourcetype=HWCIT