Cited by 600Alzheimer's disease research and treatmentsEndoplasmic Reticulum Stress and DiseaseDementia and Cognitive Impairment Research

The Unfolded Protein Response Is Activated in Pretangle Neurons in Alzheimer's Disease Hippocampus

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Hoozemans, Jeroen J.M., van Haastert, Elise S., Nijholt, Diana A.T., Rozemuller, Annemieke J.M., Eikelenboom, Piet, Scheper, Wiep·2009·The American Journal of Pathology

Abstract

Accumulation of misfolded proteins in the endoplasmic reticulum triggers a cellular stress response called the unfolded protein response (UPR) that protects the cell against the toxic buildup of misfolded proteins. Previously, we reported that UPR activation is increased in Alzheimer's disease (AD) patients. How the UPR relates to the pathological hallmarks of AD is still elusive. In the present study, the involvement of UPR activation in neurofibrillary degeneration in AD was investigated. Immunoreactivity for the phosphorylated UPR activation markers pancreatic ER kinase (pPERK), eukaryotic initiation factor 2alpha, and inositol-requiring enzyme 1alpha was observed in hippocampal neurons associated with granulovacuolar degeneration. The percentage of pPERK-immunoreactive neurons was increased in AD cases compared with nondemented control cases and with the Braak stage for neurofibrillary changes. Although absent from neurofibrillary tangles, pPERK immunoreactivity was most abundant in neurons with diffuse localization of phosphorylated tau protein. Additional analyses showed that pPERK immunoreactivity was associated with ubiquitin and the ubiquitin binding protein p62. A strong co-occurrence of immunoreactivity for both pPERK and glycogen synthase kinase 3beta in neurons was also observed. Together, these data indicate that UPR activation in AD neurons occurs at an early stage of neurofibrillary degeneration and suggest that the prolonged activation of the UPR is involved in both tau phosphorylation and neurodegeneration in AD pathogenesis.

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Crossref · 10.2353/ajpath.2009.080814

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Research works printed but not linked: 2

  1. Okamoto K, Hirai S, Iizuka T, Yanagisawa T, Watanabe M: Reexam- ination of granulovacuolar degeneration. Acta Neuropathol (Berl) 1991, 82:340 -345
  2. Yorimitsu T, Nair U, Yang Z, Klionsky DJ: ER stress triggers autoph- agy. J Biol Chem 2006, 281:30299 -30304

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Authors
Hoozemans, J. J. M., van Haastert, E. S., Nijholt, D. A. T., Rozemuller, A. J. M., Eikelenboom, P., & Scheper, W.
Affiliations
  • Vrije Universiteit Amsterdam (NL)
  • Amsterdam UMC Location University of Amsterdam (NL)
Corresponding author
Hoozemans, Jeroen J.M.
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2009-04
Volume
174
Issue
4
Pages
1241-1251
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2167500696
Cited by
600
References
59
Citations by year
2026: 27 · 2025: 16 · 2024: 29 · 2023: 41 · 2022: 39 · 2021: 41 · 2020: 63 · 2019: 31 · 2018: 41 · 2017: 45 · 2016: 27 · 2015: 41 · 2014: 32 · 2013: 38 · 2012: 33
FWCI
19.50
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Amsterdam UMC (VU Amsterdam) - Institutional Repository (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Digital Academic REpository of VU University Amsterdam (Vrije Universiteit Amsterdam) (submittedVersion)
  • Pure Amsterdam UMC (submittedVersion)
Funders
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek
  • Internationale Stichting Alzheimer Onderzoek (07506)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
unfolded protein response, Alzheimer's disease, hippocampal neurons, neurofibrillary degeneration, tau phosphorylation, eIF2α, IRE1α, granulovacuolar degeneration, ubiquitin, p62, glycogen synthase kinase-3β, endoplasmic reticulum stress, neurodegeneration
MeSH terms
Sequestosome-1 Protein, Glycogen Synthase Kinase 3 beta, Aged, Aged, 80 and over, Alzheimer Disease, Inclusion Bodies, Endoribonucleases, Female, Hippocampus, Humans, Immunohistochemistry, Male, Middle Aged, Neurons, Phosphorylation, Eukaryotic Initiation Factor-2, tau Proteins, Protein Serine-Threonine Kinases, Protein Folding, eIF-2 Kinase, Ubiquitin, Glycogen Synthase Kinase 3, Adaptor Proteins, Signal Transducing

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