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Aggregated Alpha-Synuclein Transfer Efficiently between Cultured Human Neuron-Like Cells and Localize to Lysosomes
Linkoping Univ, Dept Clin Pathol, Linkoping, Sweden.;Linkoping Univ, Dept Clin & Expt Med, Linkoping, Sweden..
Linkoping Univ, Dept Clin Pathol, Linkoping, Sweden.;Linkoping Univ, Dept Clin & Expt Med, Linkoping, Sweden..
Linkoping Univ, Dept Clin Pathol, Linkoping, Sweden.;Linkoping Univ, Dept Clin & Expt Med, Linkoping, Sweden..
Linkoping Univ, Dept Clin Pathol, Linkoping, Sweden.;Linkoping Univ, Dept Clin & Expt Med, Linkoping, Sweden.;Univ Gothenburg, Sahlgrenska Acad, Inst Neurosci & Physiol, Gothenburg, Sweden..
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2016 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 11, no 12, article id e0168700Article in journal (Refereed) Published
Abstract [en]

Parkinson's disease and other alpha-synucleinopathies are progressive neurodegenerative diseases characterized by aggregates of misfolded alpha-synuclein spreading throughout the brain. Recent evidence suggests that the pathological progression is likely due to neuron-to-neuron transfer of these aggregates between neuroanatomically connected areas of the brain. As the impact of this pathological spreading mechanism is currently debated, we aimed to investigate the transfer and subcellular location of alpha-synuclein species in a novel 3D co-culture human cell model based on highly differentiated SH-SY5Y cells. Fluorescently-labeled monomeric, oligomeric and fibrillar species of alpha-synuclein were introduced into a donor cell population and co-cultured with an EGFP-expressing acceptor-cell population of differentiated neuron-like cells. Subsequent transfer and colocalization of the different species were determined with confocal microscopy. We could confirm cell-to-cell transfer of all three alpha-synuclein species investigated. Interestingly the level of transferred oligomers and fibrils and oligomers were significantly higher than monomers, which could affect the probability of seeding and pathology in the recipient cells. Most alpha-synuclein colocalized with the lysosomal/endosomal system, both pre- and postsynaptically, suggesting its importance in the processing and spreading of alpha-synuclein.

Place, publisher, year, edition, pages
2016. Vol. 11, no 12, article id e0168700
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Neurosciences
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URN: urn:nbn:se:uu:diva-315074DOI: 10.1371/journal.pone.0168700ISI: 000391222000063OAI: oai:DiVA.org:uu-315074DiVA, id: diva2:1073475
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Swedish Research Council, MH: 523-2013-2735Marianne and Marcus Wallenberg FoundationAvailable from: 2017-02-10 Created: 2017-02-10 Last updated: 2018-01-13Bibliographically approved

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