TY  - JOUR
TI  - DOPAL derived alpha-synuclein oligomers impair synaptic vesicles physiological function
VL  - 7
AV  - public
Y1  - 2017/01/13/
N1  - This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article?s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
N2  - Parkinson's disease is a neurodegenerative disorder characterized by the death of dopaminergic neurons and by accumulation of alpha-synuclein (aS) aggregates in the surviving neurons. The dopamine catabolite 3,4-dihydroxyphenylacetaldehyde (DOPAL) is a highly reactive and toxic molecule that leads to aS oligomerization by covalent modifications to lysine residues. Here we show that DOPAL-induced aS oligomer formation in neurons is associated with damage of synaptic vesicles, and with alterations in the synaptic vesicles pools. To investigate the molecular mechanism that leads to synaptic impairment, we first aimed to characterize the biochemical and biophysical properties of the aS-DOPAL oligomers; heterogeneous ensembles of macromolecules able to permeabilise cholesterol-containing lipid membranes. aS-DOPAL oligomers can induce dopamine leak in an in vitro model of synaptic vesicles and in cellular models. The dopamine released, after conversion to DOPAL in the cytoplasm, could trigger a noxious cycle that further fuels the formation of aS-DOPAL oligomers, inducing neurodegeneration.
ID  - discovery1538588
UR  - http://dx.doi.org/10.1038/srep40699
SN  - 2045-2322
JF  - Scientific Reports
A1  - Plotegher, N
A1  - Berti, G
A1  - Ferrari, E
A1  - Tessari, I
A1  - Zanetti, M
A1  - Lunelli, L
A1  - Greggio, E
A1  - Bisaglia, M
A1  - Veronesi, M
A1  - Girotto, S
A1  - Dalla Serra, M
A1  - Perego, C
A1  - Casella, L
A1  - Bubacco, L
KW  - Molecular biophysics
KW  -  Molecular neuroscience
ER  -