Cited by 624Heat shock proteins researchEndoplasmic Reticulum Stress and DiseaseRedox biology and oxidative stress

p62 Is a Common Component of Cytoplasmic Inclusions in Protein Aggregation Diseases

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Zatloukal, Kurt, Stumptner, Cornelia, Fuchsbichler, Andrea, Heid, Hans, Schnoelzer, Martina, Kenner, Lukas, Kleinert, Reinhold, Prinz, Marco +2 more·2002·The American Journal of Pathology

Abstract

Exposure of cells to stress, particularly oxidative stress, leads to misfolding of proteins and, if they are not refolded or degraded, to cytoplasmic protein aggregates. Protein aggregates are characteristic features of a variety of chronic toxic and degenerative diseases, such as Mallory bodies (MBs) in hepatocytes in alcoholic and non-alcoholic steatohepatitis, neurofibrillary tangles in neurons in Alzheimer's, and Lewy bodies in Parkinson's disease. Using 2D gel electrophoresis and mass spectrometry, we identified p62 as a novel MB component. p62 and cytokeratins (CKs) are major MB constituents; HSP 70, HSP 25, and ubiquitinated CKs are also present. These proteins characterize MBs as a prototype of disease-associated cytoplasmic inclusions generated by stress-induced protein misfolding. As revealed by transfection of tissue culture cells overexpressed p62 did not induce aggregation of regular CK filaments but selectively bound to misfolded and ubiquitinated CKs. The general role of p62 in the cellular response to misfolded proteins was substantiated by detection of p62 in other cytoplasmic inclusions, such as neurofibrillary tangles, Lewy bodies, Rosenthal fibers, intracytoplasmic hyaline bodies in hepatocellular carcinoma, and alpha1-antitrypsin aggregates. The presence of p62 along with other stress proteins and ubiquitin in cytoplasmic inclusions indicates deposition as aggregates as a third line of defense against misfolded proteins in addition to refolding and degradation.

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  • SQSTM1 is a major component of neuronal and glial cytoplasmic inclusions in Alzheimer disease and Parkinson disease.

    “SQSTM1 is a major component of neuronal and glial cytoplasmic inclusions that characterize many neurological disorders such as Alzheimer disease and Parkinson disease [114,115].”

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Research works printed but not linked: 2

  1. Denk H, Stumptner C, Zatloukal K: Mallory body revisited. J Hepatol 2000, 32:689 -702
  2. Jensen ON, Podtelejnikov A, Mann M: Delayed extraction improves specificity in database searches by matrix-assisted laser desorption/ ionization peptide maps. Rapid Commun Mass Spectrom 1996, 10: 1371-1378

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Authors
Zatloukal, K., Stumptner, C., Fuchsbichler, A., Heid, H., Schnoelzer, M., Kenner, L., Kleinert, R., Prinz, M., Aguzzi, A., & Denk, H.
Affiliations
  • University of Graz (AT)
  • German Cancer Research Center (DE)
  • University Hospital Zurich (CH)
Corresponding author
Zatloukal, Kurt
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2002-01
Volume
160
Issue
1
Pages
255-263
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2081106067
Cited by
624
References
51
Citations by year
2026: 8 · 2025: 18 · 2024: 20 · 2023: 26 · 2022: 17 · 2021: 28 · 2020: 23 · 2019: 25 · 2018: 31 · 2017: 33 · 2016: 44 · 2015: 36 · 2014: 30 · 2013: 37 · 2012: 40
FWCI
5.45
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion)
Funders
Austrian Science Fund
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
p62, cytoplasmic inclusions, protein aggregation, oxidative stress, protein misfolding, Mallory bodies, alcoholic steatohepatitis, nonalcoholic steatohepatitis, neurofibrillary tangles, Lewy bodies, Parkinson's disease, Alzheimer's disease, cytokeratin, ubiquitination, HSP70, Rosenthal fibers, hepatocellular carcinoma, alpha-1-antitrypsin
MeSH terms
Sequestosome-1 Protein, Animals, Astrocytoma, Inclusion Bodies, Cricetinae, Heat-Shock Proteins, Humans, Keratins, Liver Diseases, Protein Binding, Proteins, Stress, Physiological, CHO Cells, Central Nervous System Neoplasms, Protein Folding, Neurodegenerative Diseases, alpha 1-Antitrypsin Deficiency, Ubiquitin, Adaptor Proteins, Signal Transducing, Mice

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