Structural heterogeneity of α-synuclein fibrils amplified from patient brain extracts.
Nat Commun
; 10(1): 5535, 2019 12 04.
Article
de En
| MEDLINE
| ID: mdl-31797870
ABSTRACT
Parkinson's disease (PD) and Multiple System Atrophy (MSA) are clinically distinctive diseases that feature a common neuropathological hallmark of aggregated α-synuclein. Little is known about how differences in α-synuclein aggregate structure affect disease phenotype. Here, we amplified α-synuclein aggregates from PD and MSA brain extracts and analyzed the conformational properties using fluorescent probes, NMR spectroscopy and electron paramagnetic resonance. We also generated and analyzed several in vitro α-synuclein polymorphs. We found that brain-derived α-synuclein fibrils were structurally different to all of the in vitro polymorphs analyzed. Importantly, there was a greater structural heterogeneity among α-synuclein fibrils from the PD brain compared to those from the MSA brain, possibly reflecting on the greater variability of disease phenotypes evident in PD. Our findings have significant ramifications for the use of non-brain-derived α-synuclein fibrils in PD and MSA studies, and raise important questions regarding the one disease-one strain hypothesis in the study of α-synucleinopathies.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Maladie de Parkinson
/
Extraits tissulaires
/
Encéphale
/
Atrophie multisystématisée
/
Alpha-Synucléine
/
Synucléinopathies
Type d'étude:
Diagnostic_studies
/
Prognostic_studies
Limites:
Aged
/
Aged80
/
Female
/
Humans
/
Male
Langue:
En
Journal:
Nat Commun
Sujet du journal:
BIOLOGIA
/
CIENCIA
Année:
2019
Type de document:
Article
Pays d'affiliation:
Allemagne