Cited by 430Telomeres, Telomerase, and SenescenceDNA Repair MechanismsGenetics, Aging, and Longevity in Model Organisms

Preferential Accumulation of Single-Stranded Regions in Telomeres of Human Fibroblasts

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Petersen, Simone, Saretzki, Gabriele, Zglinicki, Thomas von·1998·Experimental Cell Research

Abstract

We have demonstrated recently that chronic hyperoxic treatment accelerates the rate of aging of fibroblasts and the rate of telomere shortening in parallel. It was hypothesized that accelerated telomere shortening is due to preferential accumulation of oxidative damage in telomeres. To test this hypothesis, we measured the accumulation of sites sensitive to S1 nuclease treatment in telomeres, in minisatellites, and in the bulk of the genome of fibroblasts under different models of oxidative stress as well as after treatment with the alkylating agent, N-methyl-N'-nitro-N-nitrosoguanidine. A comparison with qualitative data obtained by alkaline electrophoresis reveals that the sites transferred to double-strand breaks by treatment with low concentrations of S1 nuclease are, in fact, single-stranded regions in the DNA. These regions may resemble single-stranded overhangs, gaps, or conventional single-strand breaks. The frequency of single-stranded regions is significantly higher in telomeres than in minisatellites or in the bulk of the genome under all conditions tested. Those regions induced in minisatellites or in the overall genome by a bolus dose of hydrogen peroxide are completely repaired within 24 h. On the other hand, 50 +/- 12% of H2O2-induced single-stranded regions remain unrepaired for at least 19 days in telomeres of human fibroblasts, leading to a significant increase of the telomeric steady-state level of these lesions. This preferential accumulation might significantly contribute to telomere shortening.

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Crossref · 10.1006/excr.1997.3893

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  • Telomere DNA is particularly sensitive to oxidative damage, and single-strand breaks or other stress-induced lesions at telomeres are inefficiently repaired.

    “As telomere DNA is particularly sensitive to oxidative damage (Oikawa & Kawanishi, 1999) and single‐strand breaks or other stress‐induced lesions at telomeres are inefficiently repaired (Petersen et al., 1998)”
  • Single-stranded breaks preferentially accumulate at telomeres under mild oxidative stress, leading to replication fork stalling, incomplete replication of chromosome ends, and accelerated telomere shortening.

    “single-stranded breaks have been shown to preferentially accumulate at telomeres in conditions of mild oxidative stress, and such lesions lead to replication fork stalling, resulting in incomplete replication of chromosome ends and thus accelerated telomere shortening (Petersen et al., 1998, von Zglinicki, 2000).”

    From Telomeres and cell senescence—size matters not (2017) · cites this paper as Petersen et al., 1998

  • Many studies associate the presence of a great amount of mitochondrial ROS with accumulated single-strand breaks in telomere regions, thus accelerating telomere erosion and cellular senescence.

    “Many studies associate the presence of a great amount of mitochondrial ROS with accumulated single-strand breaks in telomere regions, thus accelerating telomere erosion and cellular senescence [106,107].”

    From Role of Age-Related Mitochondrial Dysfunction in Sarcopenia (2020) · cites this paper as [106]

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Authors
Petersen, S., Saretzki, G., & Zglinicki, T. V.
Affiliations
Humboldt-Universität zu Berlin (DE)
Corresponding author
Zglinicki, Thomas von
Venue
Experimental Cell Research
Publisher
Elsevier BV
Published
1998-02
Volume
239
Issue
1
Pages
152-160
ISSN
0014-4827 (ISSN-L)
OpenAlex
W2037480531
Cited by
427
References
33
Citations by year
2026: 1 · 2025: 10 · 2024: 9 · 2023: 17 · 2022: 15 · 2021: 14 · 2020: 14 · 2019: 19 · 2018: 18 · 2017: 14 · 2016: 23 · 2015: 15 · 2014: 16 · 2013: 17 · 2012: 20
FWCI
7.99
Type
journal article
Language
en
Open access
Locations
  • Experimental Cell Research (publishedVersion)
  • PubMed (publishedVersion)
  • Newcastle University ePrints (Newcastle Univesity)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
telomeres, telomere shortening, oxidative DNA damage, hydrogen peroxide, S1 nuclease, minisatellites, N-methyl-N'-nitro-N-nitrosoguanidine, alkylating agents, DNA repair, human fibroblasts, hyperoxia, aging
MeSH terms
Cell Line, DNA, Fibroblasts, Humans, Methylnitronitrosoguanidine, Single-Strand Specific DNA and RNA Endonucleases, Telomere, Minisatellite Repeats

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