Cited by 60Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Intraneuronal amyloid β and reduced brain volume in a novel APP T714I mouse model for Alzheimer's disease

Van Broeck, Bianca, Vanhoutte, Greet, Pirici, Daniel, Van Dam, Debby, Wils, Hans, Cuijt, Ivy, Vennekens, Krist’l, Zabielski, Monika +6 more·2008·Neurobiology of Aging

Abstract

Transgenic mouse models of Alzheimer's disease (AD) expressing high levels of amyloid precursor protein (APP) with familial AD (FAD) mutations have proven to be extremely useful in understanding pathogenic processes of AD especially those that involve amyloidogenesis. We earlier described Austrian APP T714I pathology that leads to one of the earliest AD age-at-onsets with abundant intracellular and extracellular amyloid deposits in brain. The latter strikingly was non-fibrillar diffuse amyloid, composed of N-truncated A beta 42 in absence of A beta 40. In vitro, this mutation leads to one of the highest A beta 42/A beta 40 ratios among all FAD mutations. We generated an APP T714I transgenic mouse model that despite having 10 times lower transgene than endogenous murine APP deposited intraneuronal A beta in brain by 6 months of age. Accumulations increased with age, and this was paralleled by decreased brain sizes on volumetric MRI, compared to age-matched and similar transgene-expressing APP wild-type mice, although, with these levels of transgenic expression we did not detect neuronal loss or significant memory impairment. Immunohistochemical studies revealed that the majority of the intraneuronal A beta deposits colocalized with late endosomal markers, although some A beta inclusions were also positive for lysosomal and Golgi markers. These data support earlier observations of A beta accumulation in the endosomal-lysosomal pathway and the hypothesis that intraneuronal accumulation of A beta could be an important factor in the AD pathogenesis.

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Crossref · 10.1016/j.neurobiolaging.2006.10.016

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  • FAD transgenic mouse models with the highest level of amyloidogenic Aβ display particularly prominent early intraneuronal Aβ accumulation.

    “FAD transgenic mouse models with the highest level of amyloidogenic Aβ display particularly prominent early intraneuronal Aβ accumulation [89, 106, 196].”

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Authors
Van Broeck, B., Vanhoutte, G., Pirici, D., Van Dam, D., Wils, H., Cuijt, I., Vennekens, K., Zabielski, M., Michalik, A., Theuns, J., De Deyn, P. P., Van der Linden, A., Van Broeckhoven, C., & Kumar-Singh, S.
Affiliations
University of Antwerp (BE)
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2008-02
Volume
29
Issue
2
Pages
241-252
ISSN
0197-4580 (ISSN-L)
OpenAlex
W2033686120
Cited by
60
References
41
Citations by year
2025: 1 · 2022: 2 · 2021: 1 · 2020: 1 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 4 · 2014: 1 · 2013: 8 · 2012: 6
FWCI
3.76
Type
journal article
Language
en
Open access
closed
Locations
  • Neurobiology of Aging (publishedVersion)
  • PubMed (publishedVersion)
Funders
Universiteit Antwerpen
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Alzheimer's disease, intraneuronal amyloid-beta, transgenic mouse model, familial Alzheimer's disease, brain atrophy, amyloid-beta 42/40 ratio, endolysosomal pathway, late endosomes, Golgi apparatus, lysosomes, amyloid precursor protein
MeSH terms
Alzheimer Disease, Analysis of Variance, Animals, Behavior, Animal, Brain, Disease Models, Animal, Enzyme-Linked Immunosorbent Assay, Humans, Isoleucine, Magnetic Resonance Imaging, Mice, Transgenic, Neurons, Peptide Fragments, Psychomotor Performance, Tyrosine, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Maze Learning, Mice

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