Article ; Online: Phosphorylation of endogenous α-synuclein induced by extracellular seeds initiates at the pre-synaptic region and spreads to the cell body.
2022 Volume 12, Issue 1, Page(s) 1163
Abstract: Accumulation of phosphorylated α-synuclein aggregates has been implicated in several diseases, such as Parkinson's disease (PD) and dementia with Lewy bodies (DLB), and is thought to spread in a prion-like manner. Elucidating the mechanisms of prion-like ...
Abstract | Accumulation of phosphorylated α-synuclein aggregates has been implicated in several diseases, such as Parkinson's disease (PD) and dementia with Lewy bodies (DLB), and is thought to spread in a prion-like manner. Elucidating the mechanisms of prion-like transmission of α-synuclein is important for the development of therapies for these diseases, but little is known about the details. Here, we injected α-synuclein fibrils into the brains of wild-type mice and examined the early phase of the induction of phosphorylated α-synuclein accumulation. We found that phosphorylated α-synuclein appeared within a few days after the intracerebral injection. It was observed initially in presynaptic regions and subsequently extended its localization to axons and cell bodies. These results suggest that extracellular α-synuclein fibrils are taken up into the presynaptic region and seed-dependently convert the endogenous normal α-synuclein that is abundant there to an abnormal phosphorylated form, which is then transported through the axon to the cell body. |
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MeSH term(s) | Animals ; Axons/metabolism ; Cells, Cultured ; Cerebral Cortex/cytology ; Disease Models, Animal ; Embryo, Mammalian ; Hippocampus/pathology ; Humans ; Male ; Mice ; Neurodegenerative Diseases/pathology ; Phosphorylation ; Primary Cell Culture ; Recombinant Proteins/administration & dosage ; Recombinant Proteins/genetics ; Recombinant Proteins/isolation & purification ; Recombinant Proteins/metabolism ; Synapses/metabolism ; Synapses/pathology ; alpha-Synuclein/administration & dosage ; alpha-Synuclein/genetics ; alpha-Synuclein/isolation & purification ; alpha-Synuclein/metabolism |
Chemical Substances | Recombinant Proteins ; Snca protein, mouse ; alpha-Synuclein |
Language | English |
Publishing date | 2022-01-21 |
Publishing country | England |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 2615211-3 |
ISSN | 2045-2322 ; 2045-2322 |
ISSN (online) | 2045-2322 |
ISSN | 2045-2322 |
DOI | 10.1038/s41598-022-04780-4 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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