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Localization of cholesterol, amyloid and glia in Alzheimer's disease transgenic mouse brain tissue using time-of-flight secondary ion mass spectrometry (ToF-SIMS) and immunofluorescence imaging
Karolinska Institute, Sweden.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.ORCID iD: 0000-0002-2696-7215
Karolinska Institute, Sweden.
Institut des Neurosciences de Montpellier, France.
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2013 (English)In: Acta Neuropathologica, ISSN 0001-6322, E-ISSN 1432-0533, Vol. 125, no 1, p. 145-157Article in journal (Refereed) Published
Abstract [en]

The spatial distributions of lipids, amyloid-beta deposits, markers of neurons and glial cells were imaged, at submicrometer lateral resolution, in brain structures of a mouse model of Alzheimer's disease using a new methodology that combines time-of-flight secondary ion mass spectrometry (ToF-SIMS) and confocal fluorescence microscopy. The technology, which enabled us to simultaneously image the lipid and glial cell distributions in Tg2576 mouse brain structures, revealed micrometer-sized cholesterol accumulations in hippocampal regions undergoing amyloid-beta deposition. Such cholesterol granules were either associated with individual amyloid deposits or spread over entire regions undergoing amyloidogenesis. Subsequent immunohistochemical analysis of the same brain regions showed increased microglial and astrocytic immunoreactivity associated with the amyloid deposits, as expected from previous studies, but did not reveal any particular astrocytic or microglial feature correlated with cholesterol granulation. However, dystrophic neurites as well as presynaptic vesicles presented a distribution similar to that of cholesterol granules in regions undergoing amyloid-beta accumulation, thus indicating that these neuronal endpoints may retain cholesterol in areas with lesions. In conclusion, the present study provides evidence for an altered cholesterol distribution near amyloid deposits that would have been missed by several other lipid analysis methods, and opens for the possibility to study in detail the putative liaison between lipid environment and protein structure and function in Alzheimer's disease.

Place, publisher, year, edition, pages
2013. Vol. 125, no 1, p. 145-157
Keywords [en]
Alzheimer's disease, Amyloid-beta, Brain, Cholesterol, Glia, Imaging, ToF-SIMS, amyloid beta protein, cell protein, glial fibrillary acidic protein, protein Iba1, unclassified drug, Alzheimer disease, animal experiment, animal model, animal tissue, article, brain level, cellular distribution, confocal laser microscopy, controlled study, glia cell, hippocampus, immunofluorescence, immunohistochemistry, immunoreactivity, lipid analysis, lipid storage, molecular imaging, mouse, nonhuman, priority journal, protein analysis, protein localization, protein structure, scanning electron microscopy, time of flight mass spectrometry, time of flight secondary ion mass spectrometry, Amyloid, Animals, Disease Models, Animal, Fluorescent Antibody Technique, Humans, Mice, Mice, 129 Strain, Mice, Inbred C57BL, Mice, Transgenic, Neuroglia, Neurons, Spectrometry, Mass, Secondary Ion
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Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-47563DOI: 10.1007/s00401-012-1046-9Scopus ID: 2-s2.0-84872363429OAI: oai:DiVA.org:ri-47563DiVA, id: diva2:1463623
Note

Funding details: VINNOVA, Stockholms Läns Landstings, Fundacia la Marata de TV3, Vetenskapsrådet, Stiftelsen för Strategisk Forskning, Seventh Framework Programme, Knut och Alice Wallenbergs Stiftelse

Available from: 2020-09-02 Created: 2020-09-02 Last updated: 2023-06-05Bibliographically approved

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