PreprintCited by 1,342Autophagy in Disease and TherapyUbiquitin and proteasome pathwaysLiver physiology and pathology

Autophagy-deficient mice develop multiple liver tumors

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Takamura, Akito, Komatsu, Masaaki, Hara, Taichi, Sakamoto, Ayako, Kishi, Chieko, Waguri, Satoshi, Eishi, Yoshinobu, Hino, Okio +2 more·2011·Genes & Development

Abstract

Autophagy is a major pathway for degradation of cytoplasmic proteins and organelles, and has been implicated in tumor suppression. Here, we report that mice with systemic mosaic deletion of Atg5 and liver-specific Atg7⁻/⁻ mice develop benign liver adenomas. These tumor cells originate autophagy-deficient hepatocytes and show mitochondrial swelling, p62 accumulation, and oxidative stress and genomic damage responses. The size of the Atg7⁻/⁻ liver tumors is reduced by simultaneous deletion of p62. These results suggest that autophagy is important for the suppression of spontaneous tumorigenesis through a cell-intrinsic mechanism, particularly in the liver, and that p62 accumulation contributes to tumor progression.

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Crossref · 10.1101/gad.2016211

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  • In Ulk1−/− RPE, p62/SQSTM accumulates, indicating defective autophagy.

    “we also observed the accumulation of p62/SQSTM [a hallmark of defective autophagy (Klionsky et al., 2012; Mizushima et al., 2010; Takamura et al., 2011)] in the Ulk1−/− RPE indicating that the enzymatic production of LC3-II was likely due to POS induced LAP as opposed to classical autophagy.”

    From Noncanonical autophagy promotes the visual cycle (2013) · cites this paper as Takamura et al., 2011

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Authors
Takamura, A., Komatsu, M., Hara, T., Sakamoto, A., Kishi, C., Waguri, S., Eishi, Y., Hino, O., Tanaka, K., & Mizushima, N.
Affiliations
  • Tokyo Medical and Dental University (JP)
  • Tokyo Metropolitan Institute of Medical Science (JP)
  • Fukushima Medical University (JP)
  • Juntendo University (JP)
Venue
Genes & Development
Published
2011-04-15
Volume
25
Issue
8
Pages
795-800
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2116836791
Cited by
1,342
References
39
Citations by year
2026: 34 · 2025: 68 · 2024: 87 · 2023: 66 · 2022: 110 · 2021: 129 · 2020: 108 · 2019: 120 · 2018: 93 · 2017: 80 · 2016: 95 · 2015: 77 · 2014: 85 · 2013: 106 · 2012: 57
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (21659045, 21000012)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
autophagy, liver tumors, ATG5, ATG7, p62, tumor suppression, mitochondrial swelling, oxidative stress, genomic damage, spontaneous tumor development, hepatocytes
MeSH terms
Autophagy-Related Protein 5, Autophagy-Related Protein 7, Animals, Autophagy, Immunohistochemistry, Liver Neoplasms, Mice, Mutant Strains, Mice, Transgenic, Microscopy, Electron, Microtubule-Associated Proteins, Transcription Factors, Polymerase Chain Reaction, Adenoma, Liver Cell, Oxidative Stress, Mice, Transcription Factor TFIIH

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