Cited by 302Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsNuclear Structure and Function

Short Telomeres, even in the Presence of Telomerase, Limit Tissue Renewal Capacity

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Hao, Ling-Yang, Armanios, Mary, Strong, Margaret A., Karim, Baktiar, Feldser, David M., Huso, David, Greider, Carol W.·2005·Cell

Abstract

Autosomal-dominant dyskeratosis congenita is associated with heterozygous mutations in telomerase. To examine the dosage effect of telomerase, we generated a line of mTR+/- mice on the CAST/EiJ background, which has short telomeres. Interbreeding of heterozygotes resulted in progressive telomere shortening, indicating that limiting telomerase compromises telomere maintenance. In later-generation heterozygotes, we observed a decrease in tissue renewal capacity in the bone marrow, intestines, and testes that resembled defects seen in dyskeratosis congenita patients. The progressive worsening of disease with decreasing telomere length suggests that short telomeres, not telomerase level, cause stem cell failure. Further, wild-type mice derived from the late-generation heterozygous parents, termed wt*, also had short telomeres and displayed a germ cell defect, indicating that telomere length determines these phenotypes. We propose that short telomeres in mice that have normal telomerase levels can cause an occult form of genetic disease.

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Crossref · 10.1016/j.cell.2005.11.020

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  • The single strand tail length at the 3′ end of telomeres varies between approximately 100 and 280 nucleotides in humans.

    “The single strand tail length varies between approximately 100 and 280 nucleotides in humans [12-17].”
  • Many studies have shown a dependence of telomere length on age: average telomere lengths are shorter in senescent cells than in cells of younger age groups and are also shorter for male than for female.

    “Conversely, many studies have shown a dependence of telomere length on age: average telomere lengths are shorter in senescent cells than in cells of younger age groups and are also shorter for male than for female [12-17].”
  • Mouse studies show that telomere length is inherited as a distinct genotype and can be uncoupled from the telomerase and telomere gene loci.

    “When quantified, telomere length is short in wild-type offspring of parent M. castaneus mice that have short telomeres, indicating that telomere length is inherited36,82”

    From The telomere syndromes (2012) · cites this paper as [36]

  • The telomerase-knockout mouse is a valuable model for studying telomere-mediated disease mechanisms because its phenotypes closely match those in humans.

    “The telomerase-knockout mouse has provided an important model for understanding telomere-mediated disease mechanisms because there is a remarkable convergence with human disease phenotypes (an overview is shown in Table 2)36,82,84,85,97,99–111.”

    From The telomere syndromes (2012) · cites this paper as [36]

  • Telomere dysfunction causes stem cell failure phenotypes in other tissues, including intestinal epithelium where it manifests as villous atrophy due to loss of crypt stem cells.

    “For example, in the intestinal epithelium, it manifests as villous atrophy due to a loss of crypt stem cells36,101,118.”

    From The telomere syndromes (2012) · cites this paper as [36]

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Authors
Hao, L.-Y., Armanios, M., Strong, M. A., Karim, B., Feldser, D. M., Huso, D., & Greider, C. W.
Affiliations
Johns Hopkins University (US)
Corresponding author
Greider, Carol W.
Venue
Cell
Publisher
Elsevier BV
Published
2005-12
Volume
123
Issue
6
Pages
1121-1131
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2052066518
Cited by
302
References
49
Citations by year
2026: 7 · 2025: 9 · 2024: 12 · 2023: 9 · 2022: 13 · 2021: 15 · 2020: 15 · 2019: 13 · 2018: 8 · 2017: 7 · 2016: 14 · 2015: 14 · 2014: 13 · 2013: 18 · 2012: 18
FWCI
12.03
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Johns Hopkins University
  • National Institutes of Health
  • National Cancer Institute (P01CA16519, P01CA016519)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
Keywords
telomere length, telomerase, dyskeratosis congenita, tissue renewal, telomere shortening, bone marrow, intestine, testis, autosomal dominant inheritance, telomere maintenance
MeSH terms
Animals, Blood Cell Count, Crosses, Genetic, Fluorouracil, Genotype, Haplotypes, Hematopoietic System, Heterozygote, Intestinal Mucosa, Intestines, Longevity, Male, Mice, Inbred C57BL, Mice, Mutant Strains, Phenotype, Seminiferous Tubules, Stem Cells, Testis, Time Factors, Survival Rate, Bone Marrow Transplantation, Telomere, Mice, Knockout, Telomerase, Dyskeratosis Congenita, Anticipation, Genetic, Mice

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