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Off-pathway α-synuc...
Off-pathway α-synuclein oligomers seem to alter α-synuclein turnover in a cell model but lack seeding capability in vivo
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- Fagerqvist, Therese (author)
- Uppsala University
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- Näsström, Thomas (author)
- Uppsala University
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- Ihse, Elisabet (author)
- Uppsala University
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- Lindström, Veronica (author)
- Uppsala University
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- Sahlin, Charlotte (author)
- Uppsala University
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- Tucker, Stina M. Fangmark (author)
- BioArctic Neurosci AB, Stockholm
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- Kasaryan, Alex (author)
- BioArctic Neurosci AB, Stockholm
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- Karlsson, Mikael (author)
- Uppsala University
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- Nikolajeff, Fredrik (author)
- Uppsala University
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- Schell, Heinrich (author)
- Hertie Inst Clin Brain Res, Germany;German Ctr Neurodegenerat Dis, Germany
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- Outeiro, Tiago F. (author)
- Univ Med Ctr Göttingen, Germany
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- Kahle, Philipp J. (author)
- Hertie Inst Clin Brain Res, Germany;German Ctr Neurodegenerat Dis, Germany
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- Lannfelt, Lars (author)
- Uppsala University
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- Ingelsson, Martin (author)
- Uppsala University
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- Bergström, Joakim (author)
- Uppsala University
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(creator_code:org_t)
- 2013-09-20
- 2013
- English.
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In: Amyloid. - : Informa Healthcare. - 1350-6129 .- 1744-2818. ; 20:4, s. 233-244
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
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- Aggregated alpha-synuclein is the major component of Lewy bodies, protein inclusions observed in the brain in neurodegenerative disorders such as Parkinson's disease and dementia with Lewy bodies. Experimental evidence indicates that alpha-synuclein potentially can be transferred between cells and act as a seed to accelerate the aggregation process. Here, we investigated in vitro and in vivo seeding effects of alpha-synuclein oligomers induced by the reactive aldehyde 4-oxo-2-nonenal (ONE). As measured by a Thioflavin-T based fibrillization assay, there was an earlier onset of aggregation when alpha-synuclein oligomers were added to monomeric alpha-synuclein. In contrast, exogenously added alpha-synuclein oligomers did not induce aggregation in a cell model. However, cells overexpressing alpha-synuclein that were treated with the oligomers displayed reduced alpha-synuclein levels, indicating that internalized oligomers either decreased the expression or accelerated the degradation of transfected alpha-synuclein. Also in vivo there were no clear seeding effects, as intracerebral injections of alpha-synuclein oligomers into the neocortex of alpha-synuclein transgenic mice did not induce formation of proteinase K resistant alpha-synuclein pathology. Taken together, we could observe a seeding effect of the ONE-induced alpha-synuclein oligomers in a fibrillization assay, but neither in a cell nor in a mouse model.
Subject headings
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
Keyword
- Aggregation
- alpha-synuclein
- oligomers
- Parkinson's disease
- seeding
- Biomedical Sciences
- Biomedicinsk vetenskap
Publication and Content Type
- ref (subject category)
- art (subject category)
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Amyloid
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- By the author/editor
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Fagerqvist, Ther ...
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Näsström, Thomas
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Ihse, Elisabet
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Lindström, Veron ...
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Sahlin, Charlott ...
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Tucker, Stina M. ...
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show more...
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Kasaryan, Alex
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Karlsson, Mikael
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Nikolajeff, Fred ...
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Schell, Heinrich
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Outeiro, Tiago F ...
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Kahle, Philipp J ...
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Lannfelt, Lars
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Ingelsson, Marti ...
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Bergström, Joaki ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Biochemistry and ...
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Amyloid
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Linnaeus University