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@ARTICLE{Candelise:140668,
author = {Candelise, Niccolò and Schmitz, Matthias and Llorens,
Franc and Villar-Piqué, Anna and Cramm, Maria and Thom,
Tobias and Silva-Correia, Susana and da Cunha, José Eriton
Gomes and Möbius, Wiebke and Outeiro, Tiago F and Álvarez,
Valentina González and Banchelli, Martina and D'Andrea,
Cristiano and de Angelis, Marella and Zafar, Saima and
Rabano, Alberto and Matteini, Paolo and Zerr, Inga},
title = {{S}eeding variability of different alpha synuclein strains
in synucleinopathies.},
journal = {Annals of neurology},
volume = {85},
number = {5},
issn = {0364-5134},
address = {Hoboken, NJ},
publisher = {Wiley-Blackwell},
reportid = {DZNE-2020-06990},
pages = {691-703},
year = {2019},
abstract = {Currently, the exact reasons why different
α-synucleinopathies exhibit variable pathologies and
phenotypes are still unknown. A potential explanation may be
the existence of distinctive α-synuclein conformers or
strains. Here, we intend to analyze the seeding activity of
dementia with Lewy bodies (DLB) and Parkinson's disease (PD)
brain-derived α-synuclein seeds by real-time
quaking-induced conversion (RT-QuIC) and to investigate the
structure and morphology of the α-synuclein aggregates
generated by RT-QuIC.A misfolded α-synuclein-enriched brain
fraction from frontal cortex and substantia nigra pars
compacta tissue, isolated by several filtration and
centrifugation steps, was subjected to α-synuclein/RT-QuIC
analysis. Our study included neuropathologically
well-characterized cases with DLB, PD, and controls (Ctrl).
Biochemical and morphological analyses of RT-QuIC products
were conducted by western blot, dot blot analysis, Raman
spectroscopy, atomic force microscopy, and transmission
electron microscopy.Independently from the brain region, we
observed different seeding kinetics of α-synuclein in the
RT-QuIC in patients with DLB compared to PD and Ctrl.
Biochemical characterization of the RT-QuIC product
indicated the generation of a proteinase K-resistant and
fibrillary α-synuclein species in DLB-seeded reactions,
whereas PD and control seeds failed in the conversion of
wild-type α-synuclein substrate.Structural variances of
α-synuclein seeding kinetics and products in DLB and PD
indicated, for the first time, the existence of different
α-synuclein strains in these groups. Therefore, our study
contributes to a better understanding of the clinical
heterogeneity among α-synucleinopathies, offers an
opportunity for a specific diagnosis, and opens new avenues
for the future development of strain-specific therapies. Ann
Neurol 2019;85:691-703.},
keywords = {Aged / Aged, 80 and over / Brain: metabolism / Brain:
pathology / Brain Chemistry: physiology / Female / Humans /
Male / Protein Isoforms: analysis / Protein Isoforms:
metabolism / Spectrum Analysis, Raman: methods /
Synucleinopathies: metabolism / Synucleinopathies: pathology
/ alpha-Synuclein: analysis / alpha-Synuclein: metabolism},
cin = {AG Zerr / Ext UMG Zerr},
ddc = {610},
cid = {I:(DE-2719)1440011-1 / I:(DE-2719)5000037},
pnm = {344 - Clinical and Health Care Research (POF3-344)},
pid = {G:(DE-HGF)POF3-344},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30805957},
doi = {10.1002/ana.25446},
url = {https://pub.dzne.de/record/140668},
}