Cited by 63Genetics, Aging, and Longevity in Model OrganismsTelomeres, Telomerase, and SenescenceAutophagy in Disease and Therapy

Proteostasis failure and mitochondrial dysfunction leads to aneuploidy-induced senescence

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Joy, Jery, Barrio, Lara, Santos-Tapia, Celia, Romão, Daniela, Giakoumakis, Nikolaos Nikiforos, Clemente-Ruiz, Marta, Milán, Marco·2021·Developmental Cell

Abstract

Aneuploidy, an unbalanced number of chromosomes, is highly deleterious at the cellular level and leads to senescence, a stress-induced response characterized by permanent cell-cycle arrest and a well-defined associated secretory phenotype. Here, we use a Drosophila epithelial model to delineate the pathway that leads to the induction of senescence as a consequence of the acquisition of an aneuploid karyotype. Whereas aneuploidy induces, as a result of gene dosage imbalance, proteotoxic stress and activation of the major protein quality control mechanisms, near-saturation functioning of autophagy leads to compromised mitophagy, accumulation of dysfunctional mitochondria, and the production of radical oxygen species (ROS). We uncovered a role of c-Jun N-terminal kinase (JNK) in driving senescence as a consequence of dysfunctional mitochondria and ROS. We show that activation of the major protein quality control mechanisms and mitophagy dampens the deleterious effects of aneuploidy, and we identify a role of senescence in proteostasis and compensatory proliferation for tissue repair.

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Crossref · 10.1016/j.devcel.2021.06.009

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  • Similar pathways to CCF formation have been described in human brain and Drosophila models of genome instability.

    “Similar pathways have recently been described in human brain and Drosophila models of genome instability (Aguado et al., 2021; Joy et al., 2021).”

    From Cytoplasmic DNA: sources, sensing, and role in aging and disease (2021) · cites this paper as Joy et al., 2021

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Authors
Joy, J., Barrio, L., Santos-Tapia, C., Romão, D., Giakoumakis, N. N., Clemente-Ruiz, M., & Milán, M.
Affiliations
  • Institute for Research in Biomedicine (ES)
  • Institució Catalana de Recerca i Estudis Avançats (ES)
Corresponding author
Milán, Marco
Venue
Developmental Cell
Publisher
Elsevier BV
Published
2021-07
Volume
56
Issue
14
Pages
2043-2058.e7
ISSN
1534-5807 (ISSN-L)
OpenAlex
W3175043922
Cited by
63
References
80
Citations by year
2026: 15 · 2025: 12 · 2024: 6 · 2023: 11 · 2022: 15 · 2021: 4
FWCI
3.21
Type
journal article
Language
en
Open access
Locations
  • Developmental Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Dipòsit Digital de la Universitat de Barcelona (Universitat de Barcelona) (submittedVersion, cc-by-nc-nd)
Funders
  • Ministerio de Ciencia e Innovación
  • European Regional Development Fund
  • IRB Barcelona (BFU2016-77587-P, PID2019-110082GB-I00)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
aneuploidy, cellular senescence, proteostasis, mitochondrial dysfunction, mitophagy, autophagy, protein quality control, proteotoxic stress, reactive oxygen species, c-Jun N-terminal kinase, gene dosage imbalance, compensatory proliferation, tissue repair
MeSH terms
Proteostasis, Aneuploidy, Animals, Autophagy, Drosophila melanogaster, Female, Male, Mitochondria, Cellular Senescence, Reactive Oxygen Species, Chromosomal Instability, JNK Mitogen-Activated Protein Kinases, Mitophagy

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