Cited by 1,319Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsMitochondrial Function and Pathology

The DOI matches its Crossref record; 49 of the 49 references it cites were found in a registry or an index; none of the 21 sources its claims cite is checked for support yet.

Telomere dysfunction induces metabolic and mitochondrial compromise

Open access

Abstract

Telomere dysfunction activates p53-mediated cellular growth arrest, senescence and apoptosis to drive progressive atrophy and functional decline in high-turnover tissues. The broader adverse impact of telomere dysfunction across many tissues including more quiescent systems prompted transcriptomic network analyses to identify common mechanisms operative in haematopoietic stem cells, heart and liver. These unbiased studies revealed profound repression of peroxisome proliferator-activated receptor gamma, coactivator 1 alpha and beta (PGC-1α and PGC-1β, also known as Ppargc1a and Ppargc1b, respectively) and the downstream network in mice null for either telomerase reverse transcriptase (Tert) or telomerase RNA component (Terc) genes. Consistent with PGCs as master regulators of mitochondrial physiology and metabolism, telomere dysfunction is associated with impaired mitochondrial biogenesis and function, decreased gluconeogenesis, cardiomyopathy, and increased reactive oxygen species. In the setting of telomere dysfunction, enforced Tert or PGC-1α expression or germline deletion of p53 (also known as Trp53) substantially restores PGC network expression, mitochondrial respiration, cardiac function and gluconeogenesis. We demonstrate that telomere dysfunction activates p53 which in turn binds and represses PGC-1α and PGC-1β promoters, thereby forging a direct link between telomere and mitochondrial biology. We propose that this telomere–p53–PGC axis contributes to organ and metabolic failure and to diminishing organismal fitness in the setting of telomere dysfunction.

Overview

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TL;DR

Telomere dysfunction in mice represses PGC-1α and PGC-1β through p53, impairing mitochondrial function and metabolism. This telomere–p53–PGC pathway links telomere attrition to cardiomyopathy, defective gluconeogenesis, and stem cell decline.

Key findings

  • Transcriptomic profiling of haematopoietic stem cells, heart, and liver from G4 Tert−/− mice showed broad repression of the PGC-1α/β network, including oxidative phosphorylation, oxidative defence, gluconeogenesis, fatty acid/cholesterol synthesis, and β-oxidation genes; RT–qPCR and western blot confirmed lower PGC-1α/β and targets such as NRF-1, ERRα, PPARα, and TFAM.
  • Mitochondrial consequences included reduced mitochondrial DNA content and density, lower complex I and IV activity, decreased state III respiration, reduced uncoupled respiration in G4 liver and heart (31% and 25%, respectively), lower ATP synthesis/content, and increased ROS/H2O2 production.
  • G4 mice developed dilated cardiomyopathy by 15 months, showed a 30% drop in plasma glucose after 12 h fasting, and had impaired HSC reconstitution; adenoviral Tert partially restored PGC targets and raised glucose by 30% in vivo and 80% in cultured G4 hepatocytes, while adenoviral PGC-1α increased state III and IV respiration in G4 liver mitochondria by 3.1-fold and 3.2-fold.
  • p53 deficiency restored PGC expression and mitochondrial DNA copy number; p53–ER activation repressed PGCs and reduced mitochondrial mass by 10–15%; p53 bound PGC-1α/β promoters and repressed reporters fivefold; p53 loss improved fractional shortening by 30% in a doxorubicin cardiomyopathy protocol.

Methods

  • Used Tert−/− mice across WT, G1, and G4 generations, Terc−/− G2 mice, and p53−/− backgrounds; profiled HSCs, liver, and heart by microarray with SAM or fold-change analysis and Ingenuity pathway analysis, followed by RT–qPCR and western blot.
  • Assessed mitochondrial and metabolic phenotypes via qPCR-based mtDNA quantification, HPLC ATP measurement, Seahorse XF24 and Clark electrode respiration, ROS and carbonylated protein assays, fasting glucose, hepatocyte gluconeogenesis, echocardiography, and competitive transplantation.
  • Mechanistic tests included adenoviral Tert or PGC-1α delivery, p53–ER MEF activation, PGC promoter luciferase reporters, anti-p53 chromatin immunoprecipitation, and doxorubicin-induced cardiomyopathy.

Limitations

  • No dedicated limitations section is present; the authors state that the relative contributions of DNA damage checkpoints versus metabolic/mitochondrial dysfunction require further study, and that p53-mediated PGC repression is context-dependent.
  • Evidence comes from mouse genetic models and cell systems, with no human data; germline p53 deletion and adenoviral overexpression may introduce pleiotropic or context-specific effects.
  • The ROS scavenger N-acetylcysteine did not rescue defective HSC repopulation, indicating increased ROS is not central to HSC failure, although its role in other phenotypes is not fully resolved.

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Integrity signals

Registry

Crossref · 10.1038/nature09787

Cites

49 of 49 references verified0 citation errors · 0 not checkable

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Verification

Claims the paper makes

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Show all 46 claims

  • It may state two separate claims as one. 22
  • Probably not a substantial claim. 5
25 of 25
  • The paper relies on this without support.

    N-acetylcysteine given from birth effectively scavenges reactive oxygen species in the haematopoietic stem cell compartments of G1 and G4 mice.

    “G1 or G4 mice treated from birth with N-acetylcysteine, a ROS scavenger, did not rescue defective HSC repopulation in competitive transplantations”
  • The paper relies on this without support.

    The G2 Terc−/− mice used have a degree of telomere dysfunction comparable to that of G4 Tert−/− mice.

    “G2 Terc−/− liver and hearts (exhibiting comparable telomere dysfunction as G4 Tert−/− mice)”
  • The paper relies on this without support.

    The transcriptomic network analyses used in this study were unbiased.

    “These unbiased studies revealed profound repression of peroxisome proliferator-activated receptor gamma, coactivator 1 alpha and beta”
  • The paper relies on this without support.

    The p53 binding elements identified in the PGC-1α and PGC-1β promoters are the functional sites through which p53 represses these genes.

    “anti-p53 chromatin-immunoprecipitation assays in G2 Terc−/− p53+/+, but not G2 Terc−/− p53−/−, MEFs demonstrated physical binding between p53 and (1) PGC-1α fragments containing p53 binding elements at −564 and −954, but not −2317, and (2) PGC1β fragments containing p53 binding elements at −1616 and −1030”
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Metadata

Authors
Sahin, E., Colla, S., Liesa, M., Moslehi, J., Müller, F. L., Guo, M., Cooper, M., Kotton, D., Fabian, A. J., Walkey, C., Maser, R. S., Tonon, G., Foerster, F., Xiong, R., Wang, Y. A., Shukla, S. A., Jaskelioff, M., Martin, E. S., Heffernan, T. P., Protopopov, A., Ivanova, E., Mahoney, J. E., Kost-Alimova, M., Perry, S. R., Bronson, R., Liao, R., Mulligan, R., Shirihai, O. S., Chin, L., & DePinho, R. A.
Affiliations
  • Dana-Farber Cancer Institute (US)
  • Harvard University (US)
  • Boston University (US)
  • Brigham and Women's Hospital (US)
  • University of Massachusetts Chan Medical School (US)
  • The University of Melbourne (AU)
Corresponding author
DePinho, Ronald A.
Venue
Nature
Published
2011-02-09
Volume
470
Issue
7334
Pages
359-365
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2124098526
Cited by
1,319
References
49
Citations by year
2026: 50 · 2025: 58 · 2024: 73 · 2023: 87 · 2022: 83 · 2021: 100 · 2020: 78 · 2019: 84 · 2018: 81 · 2017: 88 · 2016: 91 · 2015: 93 · 2014: 83 · 2013: 94 · 2012: 111
FWCI
76.58
Type
journal article
Language
en
Update notices
erratum (2011-06-22)
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • Archivio Istituzionale della Ricerca - Università Vita-Salute San Raffaele (submittedVersion)
Funders
  • National Cancer Institute (R01CA084628)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK035914, R01DK089185, U24DK59635, P30DK046200, U24DK059635, R01DK063356, R01DK056690, P30DK079638)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › 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 › Mitochondrial Function and Pathology
Keywords
telomere dysfunction, p53, PGC-1α, PGC-1β, telomerase reverse transcriptase, telomerase RNA, mitochondrial biogenesis, mitochondrial dysfunction, gluconeogenesis, cardiomyopathy, reactive oxygen species, cellular senescence, hematopoietic stem cells, liver, heart, aging, transcriptional repression
MeSH terms
Adenosine Triphosphate, Aging, Animals, DNA, Mitochondrial, Doxorubicin, Gluconeogenesis, Hematopoietic Stem Cells, Liver, Mitochondria, Cardiomyopathies, Myocardium, RNA, Transcription Factors, Tumor Suppressor Protein p53, Telomere, Reactive Oxygen Species, Telomerase, Cell Proliferation, Mice

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