Cited by 655Autophagy in Disease and TherapyNuclear Structure and FunctionGenetics, Aging, and Longevity in Model Organisms

Autophagy mediates degradation of nuclear lamina

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Dou, Zhixun, Xu, Caiyue, Donahue, Greg, Shimi, Takeshi, Pan, Ji-An, Zhu, Jiajun, Ivanov, Andrejs, Capell, Brian C. +12 more·2015·Nature

Abstract

Macroautophagy (hereafter referred to as autophagy) is a catabolic membrane trafficking process that degrades a variety of cellular constituents and is associated with human diseases. Although extensive studies have focused on autophagic turnover of cytoplasmic materials, little is known about the role of autophagy in degrading nuclear components. Here we report that the autophagy machinery mediates degradation of nuclear lamina components in mammals. The autophagy protein LC3/Atg8, which is involved in autophagy membrane trafficking and substrate delivery, is present in the nucleus and directly interacts with the nuclear lamina protein lamin B1, and binds to lamin-associated domains on chromatin. This LC3-lamin B1 interaction does not downregulate lamin B1 during starvation, but mediates its degradation upon oncogenic insults, such as by activated RAS. Lamin B1 degradation is achieved by nucleus-to-cytoplasm transport that delivers lamin B1 to the lysosome. Inhibiting autophagy or the LC3-lamin B1 interaction prevents activated RAS-induced lamin B1 loss and attenuates oncogene-induced senescence in primary human cells. Our study suggests that this new function of autophagy acts as a guarding mechanism protecting cells from tumorigenesis.

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Crossref · 10.1038/nature15548

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  • Lamin B1 loss and reduced nuclear integrity is suggested to fuel the SASP by contributing to CCF formation, stimulating the cGAS-STING pathway and interferon response.

    “Furthermore, lamin B1 loss and reduced nuclear integrity is suggested to fuel the SASP by contributing to CCF formation (Dou et al., 2015; Ivanov et al., 2013), thereby stimulating the cGAS-STING pathway and interferon response (see Secretion) (Li and Chen, 2018).”

    From Cellular Senescence: Defining a Path Forward (2019) · cites this paper as Dou et al., 2015

    In the passage labeled Abstract (page unavailable), Dou et al. report reduced lamin B1 at the nuclear lamina, nuclear membrane blebbing, and cytoplasmic chromatin fragments in senescent cells. They also report that blocking LC3–lamin B1 interaction delayed the appearance of those fragments. These findings support a link to CCF formation, but the paper does not establish that this process fuels the SASP; the citing sentence assigns the downstream cGAS–STING claim to a different citation. (LLM, conf=0.84)

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  • Cellular senescence is accompanied by substantial reorganization of the nuclear envelope and a breakdown in nucleocytoplasmic trafficking, including altered expression and degradation of Lamin B1, and formation of cytoplasmic chromatin fragments.

    “Cellular senescence is accompanied by substantial reorganization of the nuclear envelope and a breakdown in nucleocytoplasmic trafficking, including altered expression and degradation of Lamin B1, and the formation of cytoplasmic chromatin fragments (CCFs) [38–45].”

    From Chemically induced reprogramming to reverse cellular aging (2023) · cites this paper as [40]

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  • Loss of nuclear lamina can release cytosolic chromatin fragments into the cytoplasm of senescent cells.

    “Loss of nuclear lamina can lead to the release of cytosolic chromatin fragments (CCFs) in the cytoplasm of senescent cells58–60”
  • Autophagy-mediated CCF formation together with reduced histone synthesis might lead to global loss of core histones during senescence, affecting the chromatin landscape.

    “Autophagy-mediated CCF formation (Dou et al., 2015) together with reduced histone synthesis (O'Sullivan et al., 2010) might also lead to a global loss of core histones during senescence, affecting the chromatin landscape (Chan and Narita, 2019; Ivanov et al., 2013).”

    From Cellular Senescence: Defining a Path Forward (2019) · cites this paper as Dou et al., 2015

  • Downregulation of lamin B1 is a key feature of senescence.

    “Downregulation of lamin B1, a major component of the nuclear lamina, is another key feature of senescence (Dou et al., 2015; Freund et al., 2012; Shah et al., 2013; Shimi et al., 2011).”

    From Cellular Senescence: Defining a Path Forward (2019) · cites this paper as Dou et al., 2015

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Authors
Dou, Z., Xu, C., Donahue, G., Shimi, T., Pan, J.-A., Zhu, J., Ivanov, A., Capell, B. C., Drake, A. M., Shah, P. P., Catanzaro, J. M., Daniel Ricketts, M., Lamark, T., Adam, S. A., Marmorstein, R., Zong, W.-X., Johansen, T., Goldman, R. D., Adams, P. D., & Berger, S. L.
Affiliations
  • University of Pennsylvania (US)
  • Northwestern University (US)
  • Stony Brook University (US)
  • Cancer Research UK Scotland Institute (GB)
  • UiT The Arctic University of Norway (NO)
  • Abramson Cancer Center (US)
Corresponding author
Berger, Shelley L.
Venue
Nature
Published
2015-10-28
Volume
527
Issue
7576
Pages
105-109
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2159591471
Cited by
655
References
41
Citations by year
2026: 38 · 2025: 56 · 2024: 58 · 2023: 55 · 2022: 63 · 2021: 88 · 2020: 80 · 2019: 68 · 2018: 57 · 2017: 44 · 2016: 45 · 2015: 3
FWCI
38.94
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • Queen Mary Research Online (Queen Mary University of London) (submittedVersion)
Funders
  • Cancer Research UK (22311)
  • National Institute on Aging (P01AG031862)
  • National Cancer Institute (R01CA129536, R01CA078831, P30CA060553)
  • National Institute of General Medical Sciences (R01GM106023, R01GM097355)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (T32AR007465)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
autophagy, nuclear lamina, lamin B1, LC3, oncogenic Ras, oncogene-induced senescence, lysosomal degradation, chromatin, carcinogenesis
MeSH terms
Autophagy-Related Protein 8 Family, Animals, Autophagy, Cell Transformation, Neoplastic, Cells, Cultured, Chromatin, Cytoplasm, Fibroblasts, Humans, Lysosomes, Microfilament Proteins, Microtubule-Associated Proteins, Protein Binding, Oncogene Protein p21(ras), Cellular Senescence, Nuclear Lamina, Lamin Type B, Adaptor Proteins, Signal Transducing, Mice, HEK293 Cells, Proteolysis

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