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@ARTICLE{Schildknecht:136890,
author = {Schildknecht, Stefan and Gerding, Hanne R and Karreman,
Christiaan and Drescher, Malte and Lashuel, Hilal A and
Outeiro, Tiago F and Di Monte, Donato A and Leist, Marcel},
title = {{O}xidative and nitrative alpha-synuclein modifications and
proteostatic stress: implications for disease mechanisms and
interventions in synucleinopathies.},
journal = {Journal of neurochemistry},
volume = {125},
number = {4},
issn = {0022-3042},
address = {Oxford},
publisher = {Wiley-Blackwell},
reportid = {DZNE-2020-03212},
pages = {491-511},
year = {2013},
abstract = {Alpha-synuclein (ASYN) is a major constituent of the
typical protein aggregates observed in several
neurodegenerative diseases that are collectively referred to
as synucleinopathies. A causal involvement of ASYN in the
initiation and progression of neurological diseases is
suggested by observations indicating that single-point
(e.g., A30P, A53T) or multiplication mutations of the gene
encoding for ASYN cause early onset forms of Parkinson's
disease (PD). The relative regional specificity of ASYN
pathology is still a riddle that cannot be simply explained
by its expression pattern. Also, transgenic over-expression
of ASYN in mice does not recapitulate the typical
dopaminergic neuronal death observed in PD. Thus, additional
factors must contribute to ASYN-related toxicity. For
instance, synucleinopathies are usually associated with
inflammation and elevated levels of oxidative stress in
affected brain areas. In turn, these conditions favor
oxidative modifications of ASYN. Among these modifications,
nitration of tyrosine residues, formation of covalent ASYN
dimers, as well as methionine sulfoxidations are prominent
examples that are observed in post-mortem PD brain sections.
Oxidative modifications can affect ASYN aggregation, as well
as its binding to biological membranes. This would affect
neurotransmitter recycling, mitochondrial function and
dynamics (fission/fusion), ASYN's degradation within a cell
and, possibly, the transfer of modified ASYN to adjacent
cells. Here, we propose a model on how covalent
modifications of ASYN link energy stress, altered
proteostasis, and oxidative stress, three major pathogenic
processes involved in PD progression. Moreover, we
hypothesize that ASYN may act physiologically as a
catalytically regenerated scavenger of oxidants in healthy
cells, thus performing an important protective role prior to
the onset of disease or during aging.},
subtyp = {Review Article},
keywords = {Humans / Nerve Degeneration: metabolism / Nerve
Degeneration: pathology / Nitric Oxide: metabolism /
Oxidative Stress: physiology / Parkinson Disease: metabolism
/ Parkinson Disease: pathology / Peroxynitrous Acid:
metabolism / alpha-Synuclein: metabolism / SNCA protein,
human (NLM Chemicals) / alpha-Synuclein (NLM Chemicals) /
Peroxynitrous Acid (NLM Chemicals) / Nitric Oxide (NLM
Chemicals)},
cin = {AG Di Monte},
ddc = {610},
cid = {I:(DE-2719)1013008},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:23452040},
doi = {10.1111/jnc.12226},
url = {https://pub.dzne.de/record/136890},
}