Now showing items 16-31 of 31

    • The RNA component of human telomerase 

      Greider, Carol W.; Feng, Junli (American Association for the Advancement of Science, 1995-09-01)
      Eukaryotic chromosomes are capped with repetitive telomere sequences that protect the ends from damage and rearrangements. Telomere repeats are synthesized by telomerase, a ribonucleic acid (RNA)-protein complex. Here, the ...
    • Secondary structure of vertebrate telomerase RNA 

      Greider, Carol W.; Blasco, Maria A.; Chen, Jiunn-Liang (Cell Press, 2000-03-03)
      Telomerase is a ribonucleoprotein enzyme that maintains telomere length by adding telomeric sequence repeats onto chromosome ends. The essential RNA component of telomerase provides the template for telomeric repeat ...
    • Short dysfunctional telomeres impair tumorigenesis in the INK4a(delta2/3) cancer-prone mouse. 

      DePinho, Ronald A.; Greider, Carol W.; Singer, Robert H.; Gottlieb, Geoffrey J.; Lee, Kee-Ho; Femino, Andrea; Chin, Lynda; Greenberg, Roger A. (Cell Press, 1999-05-14)
      Maintenance of telomere length is predicted to be essential for bypass of senescence and crisis checkpoints in cancer cells. The impact of telomere dysfunction on tumorigenesis was assessed in successive generations of ...
    • Short telomeres and ataxia-telangiectasia mutated deficiency cooperatively increase telomere dysfunction and suppress tumorigenesis 

      Armanios, Mary; Qi, Ling; Strong, Margaret A.; Karim, Baktiar O.; Greider, Carol W.; Huso, David L. (American Association of Cancer Research, 2003-12-01)
      To examine the role of ataxia-telangiectasia mutated (Atm) in telomere function, we generated Atm and telomerase null mice (Atm(-/-) mTR(-/-) iG6 mice). These mice exhibited increased germ cell death and chromosome fusions ...
    • Short telomeres induce a DNA damage response in Saccharomyces cerevisiae 

      Greider, Carol W.; IJipma, Arne S. (American Society for Cell Biology, 2003-03)
      Telomerase-deficient Saccharomyces cerevisiae cells show a progressive decrease in telomere length. When grown for several days in log phase, the tlc1Delta cells initially display wild-type growth kinetics with subsequent ...
    • Short Telomeres Limit Tumor Progression In Vivo by Inducing Senescence 

      Greider, Carol W.; Feldser, David M. (Cell Press, 2007-05)
      Telomere maintenance is critical for cancer progression. To examine mechanisms of tumor suppression induced by short telomeres, we crossed mice deficient for the RNA component of telomerase, mTR(-/-), with Emu-myc transgenic ...
    • Short Telomeres, even in the Presence of Telomerase, Limit Tissue Renewal Capacity 

      Greider, Carol W.; Huso, David; Feldser, David M.; Karim, Baktiar; Strong, Margaret A.; Armanios, Mary; Hao, Ling-Yang (Cell Press, 2005-12-16)
      Autosomal-dominant dyskeratosis congenita is associated with heterozygous mutations in telomerase. To examine the dosage effect of telomerase, we generated a line of mTR+/ÿ mice on the CAST/EiJ background, which has short ...
    • The Shortest Telomere, Not Average Telomere Length, Is Critical for Cell Viability and Chromosome Stability 

      Greider, Carol W.; Hao, Ling-Yang; Strong, Margaret A.; Hemann, Michael T. (Cell Press, 2001-10-05)
      Loss of telomere function can induce cell cycle arrest and apoptosis. To investigate the processes that trig- ger cellular responses to telomere dysfunction, we crossed mTR􏰀/􏰀 G6 mice that have short telomeres with mice ...
    • Telomerase mutations in families with idiopathic pulmonary fibrosis 

      Loyd, James E.; Greider, Carol W.; Lansdorp, Peter M.; Phillips, John A., III; Vulto, Irma; Xie, Mingyi; Lawson, William E.; Markin, Cheryl; Ingersoll, Roxann G.; Alder, Jonathan K.; Cogan, Joy D.; Chen, Julian J.-L.; Armanios, Mary Y. (Massachusetts Medical Society, 2007-03-29)
      BACKGROUND: Idiopathic pulmonary fibrosis is progressive and often fatal; causes of familial clustering of the disease are unknown. Germ-line mutations in the genes hTERT and hTR, encoding telomerase reverse transcriptase ...
    • Telomere Dysfunction Increases Mutation Rate and Genomic Instability 

      Greider, Carol W.; Feldser, David M.; Hackett, Jennifer A. (Cell Press, 2001-08-10)
      The increased tumor incidence in telomerase null mice suggests that telomere dysfunction induces genetic instability. To test this directly, we examined mutation rate in the absence of telomerase in S. cerevisiae. The ...
    • Telomere dysfunction triggers developmentally regulated germ cell apoptosis 

      Greider, Carol W.; Chin, Lynda; DePinho, Ronald A.; Strong, Margaret A.; Rudolph, Karl Lenhard; Hemann, Michael T. (American Society for Cell Biology, 2001-07)
      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 ...
    • Telomere Shortening and Tumor Formation by Mouse Cells Lacking Telomerase RNA 

      Greider, Carol W.; DePinho, Ronald A.; Lansdorp, Peter M.; Semper, Enrique; Hande, M. Prakash; Lee, Han-Woong; Blasco, Maria A. (Cell Press, 1997-10-03)
      To examine the role of telomerase in normal and neoplastic growth, the telomerase RNA component (mTR) was deleted from the mouse germline. mTR-/- mice lacked detectable telomerase activity yet were viable for the six ...
    • The Telomere Terminal Transferase of Tetrahymena Is a Ribonucleoprotein Enzyme with Two Kinds of Primer Specificity 

      Blackburn, Elizabeth H.; Greider, Carol W. (Cell Press, 1987-12-24)
      We have analyzed the de novo telomere synthesis catalyzed by the enzyme telomere terminal transferase (telomerase) from Tetrahymena. Oligonucleotides representing the G-rich strand of telomeric sequences from five different ...
    • Telomeres Do D-Loop–T-Loop 

      Greider, Carol W. (Cell Press, 1999-05-14)
    • Tracking Telomerase 

      Blackburn, Elizabeth H.; Greider, Carol W. (2004-01-23)
    • Wild-derived inbred mouse strains have short telomeres 

      Greider, Carol W.; Hemann, Michael T. (Oxford University Press, 2000-11-15)
      Telomere length and telomerase activity directly affect the replicative capacity of primary human cells. Some have suggested that telomere length influences organismal lifespan. We compared telomere length distributions ...