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Synapsin III defici...
Synapsin III deficiency hampers α-synuclein aggregation, striatal synaptic damage and nigral cell loss in an AAV-based mouse model of Parkinson’s disease
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- Faustini, Gaia (author)
- University of Brescia
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- Longhena, Francesca (author)
- University of Brescia
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- Varanita, Tatiana (author)
- University of Padova
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- Bubacco, Luigi (author)
- University of Padova
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- Pizzi, Marina (author)
- University of Brescia
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- Missale, Cristina (author)
- University of Brescia
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- Benfenati, Fabio (author)
- Italian Institute of Technology
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- Björklund, Anders (author)
- Lund University,Lunds universitet,Utvecklings- och regenerativ neurobiologi,Forskargrupper vid Lunds universitet,Developmental and Regenerative Neurobiology,Lund University Research Groups
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- Spano, Pier Franco (author)
- University of Brescia
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- Bellucci, Arianna (author)
- University of Brescia
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(creator_code:org_t)
- 2018-07-25
- 2018
- English 19 s.
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In: Acta Neuropathologica. - : Springer Science and Business Media LLC. - 0001-6322 .- 1432-0533. ; 136:4, s. 621-639
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
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- Parkinson’s disease (PD), the most common neurodegenerative movement disorder, is characterized by the progressive loss of nigral dopamine neurons. The deposition of fibrillary aggregated α-synuclein in Lewy bodies (LB), that is considered to play a causative role in the disease, constitutes another key neuropathological hallmark of PD. We have recently described that synapsin III (Syn III), a synaptic phosphoprotein that regulates dopamine release in cooperation with α-synuclein, is present in the α-synuclein insoluble fibrils composing the LB of patients affected by PD. Moreover, we observed that silencing of Syn III gene could prevent α-synuclein fibrillary aggregation in vitro. This evidence suggests that Syn III might be crucially involved in α-synuclein pathological deposition. To test this hypothesis, we studied whether mice knock-out (ko) for Syn III might be protected from α-synuclein aggregation and nigrostriatal neuron degeneration resulting from the unilateral injection of adeno-associated viral vectors (AAV)-mediating human wild-type (wt) α-synuclein overexpression (AAV-hαsyn). We found that Syn III ko mice injected with AAV-hαsyn did not develop fibrillary insoluble α-synuclein aggregates, showed reduced amount of α-synuclein oligomers detected by in situ proximity ligation assay (PLA) and lower levels of Ser129-phosphorylated α-synuclein. Moreover, the nigrostriatal neurons of Syn III ko mice were protected from both synaptic damage and degeneration triggered by the AAV-hαsyn injection. Our observations indicate that Syn III constitutes a crucial mediator of α-synuclein aggregation and toxicity and identify Syn III as a novel therapeutic target for PD.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Neurosciences (hsv//eng)
Keyword
- AAV
- Nigrostriatal degeneration
- Syn III
- Synaptic proteins alterations
- α-Synuclein aggregation
Publication and Content Type
- art (subject category)
- ref (subject category)
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Faustini, Gaia
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Longhena, France ...
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Varanita, Tatian ...
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Bubacco, Luigi
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Pizzi, Marina
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Missale, Cristin ...
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Benfenati, Fabio
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Björklund, Ander ...
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Spano, Pier Fran ...
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Bellucci, Ariann ...
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Neurosciences
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Acta Neuropathol ...
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Lund University