Cited by 174Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

Intraneuronal pyroglutamate-Abeta 3–42 triggers neurodegeneration and lethal neurological deficits in a transgenic mouse model

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Wirths, Oliver, Breyhan, Henning, Cynis, Holger, Schilling, Stephan, Demuth, Hans-Ulrich, Bayer, Thomas A.·2009·Acta Neuropathologica

Abstract

It is well established that only a fraction of Abeta peptides in the brain of Alzheimer's disease (AD) patients start with N-terminal aspartate (Abeta(1D)) which is generated by proteolytic processing of amyloid precursor protein (APP) by BACE. N-terminally truncated and pyroglutamate modified Abeta starting at position 3 and ending with amino acid 42 [Abeta(3(pE)-42)] have been previously shown to represent a major species in the brain of AD patients. When compared with Abeta(1-42), this peptide has stronger aggregation propensity and increased toxicity in vitro. Although it is unknown which peptidases remove the first two N-terminal amino acids, the cyclization of Abeta at N-terminal glutamate can be catalyzed in vitro. Here, we show that Abeta(3(pE)-42) induces neurodegeneration and concomitant neurological deficits in a novel mouse model (TBA2 transgenic mice). Although TBA2 transgenic mice exhibit a strong neuronal expression of Abeta(3-42) predominantly in hippocampus and cerebellum, few plaques were found in the cortex, cerebellum, brain stem and thalamus. The levels of converted Abeta(3(pE)-42) in TBA2 mice were comparable to the APP/PS1KI mouse model with robust neuron loss and associated behavioral deficits. Eight weeks after birth TBA2 mice developed massive neurological impairments together with abundant loss of Purkinje cells. Although the TBA2 model lacks important AD-typical neuropathological features like tangles and hippocampal degeneration, it clearly demonstrates that intraneuronal Abeta(3(pE)-42) is neurotoxic in vivo.

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  • In TBA2 mice, expression of Aβ3Q-42 resulted in abundant AβpE formation in the hippocampus and Purkinje cell layer, and at ~2 months of age a severe neurological phenotype with growth retardation, loss of motor coordination, and ataxia became evident together with loss of Purkinje cells.

    “At ~2 months of age, a severe neurological phenotype with growth retardation, loss of motor coordination, and ataxia became evident, together with AβpE accumulation and loss of Purkinje cells [63].”

    From Neuron Loss in Alzheimer’s Disease: Translation in Transgenic Mouse Models (2020) · cites this paper as [63]

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Authors
Wirths, O., Breyhan, H., Cynis, H., Schilling, S., Demuth, H.-U., & Bayer, T. A.
Affiliations
  • University of Göttingen (DE)
  • Probiodrug (Germany) (DE)
Corresponding author
Bayer, Thomas A.
Venue
Acta Neuropathologica
Published
2009-06-23
Volume
118
Issue
4
Pages
487-496
ISSN
  • 0001-6322 (ISSN-L)
  • 1432-0533
OpenAlex
W2127458156
Cited by
174
References
71
Citations by year
2026: 1 · 2025: 5 · 2024: 7 · 2023: 10 · 2022: 6 · 2021: 8 · 2020: 6 · 2019: 7 · 2018: 9 · 2017: 9 · 2016: 11 · 2015: 13 · 2014: 18 · 2013: 12 · 2012: 19
FWCI
11.49
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Acta Neuropathologica (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • GoeScholar The Publication Server of the Georg-August-Universität Göttingen (Georg-August-Universität Göttingen) (submittedVersion, cc-by)
Funders
  • Alzheimer Forschung Initiative
  • European Commission (MEST-CT-2005-020013)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
pyroglutamate amyloid-beta, Alzheimer's disease, neurodegeneration, Purkinje cell degeneration, neurotoxicity, neurological deficit, amyloid precursor protein, BACE, amyloid fibril formation, cerebellum
MeSH terms
Analysis of Variance, Animals, Body Weight, Brain, Brain Diseases, Enzyme-Linked Immunosorbent Assay, Immunohistochemistry, Mice, Transgenic, Nerve Degeneration, Neurons, Peptide Fragments, Phenotype, Purkinje Cells, Amyloid beta-Peptides, Cell Death, Mice

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