Guam ALS-PDC is a distinct double-prion disorder featuring both tau and Aß prions.
Proc Natl Acad Sci U S A
; 120(13): e2220984120, 2023 03 28.
Article
en En
| MEDLINE
| ID: mdl-36952379
ABSTRACT
The amyotrophic lateral sclerosis-parkinsonism dementia complex (ALS-PDC) of Guam is an endemic neurodegenerative disease that features widespread tau tangles, occasional α-synuclein Lewy bodies, and sparse ß-amyloid (Aß) plaques distributed in the central nervous system. Extensive studies of genetic or environmental factors have failed to identify a cause of ALS-PDC. Building on prior work describing the detection of tau and Aß prions in Alzheimer's disease (AD) and Down syndrome brains, we investigated ALS-PDC brain samples for the presence of prions. We obtained postmortem frozen brain tissue from 26 donors from Guam with ALS-PDC or no neurological impairment and 71 non-Guamanian donors with AD or no neurological impairment. We employed cellular bioassays to detect the prion conformers of tau, α-synuclein, and Aß proteins in brain extracts. In ALS-PDC brain samples, we detected high titers of tau and Aß prions, but we did not detect α-synuclein prions in either cohort. The specific activity of tau and Aß prions was increased in Guam ALS-PDC compared with sporadic AD. Applying partial least squares regression to all biochemical and prion infectivity measurements, we demonstrated that the ALS-PDC cohort has a unique molecular signature distinguishable from AD. Our findings argue that Guam ALS-PDC is a distinct double-prion disorder featuring both tau and Aß prions.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Priones
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Enfermedades por Prión
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Enfermedades Neurodegenerativas
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Trastornos Parkinsonianos
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Demencia
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Enfermedad de Alzheimer
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Esclerosis Amiotrófica Lateral
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Proc Natl Acad Sci U S A
Año:
2023
Tipo del documento:
Article