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2017 ; 7
(1
): 9584
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Generation of a new infectious recombinant prion: a model to understand
Gerstmann-Sträussler-Scheinker syndrome
#MMPMID28851967
Elezgarai SR
; Fernández-Borges N
; Eraña H
; Sevillano AM
; Charco JM
; Harrathi C
; Saá P
; Gil D
; Kong Q
; Requena JR
; Andréoletti O
; Castilla J
Sci Rep
2017[Aug]; 7
(1
): 9584
PMID28851967
show ga
Human transmissible spongiform encephalopathies (TSEs) or prion diseases are a
group of fatal neurodegenerative disorders that include Kuru, Creutzfeldt-Jakob
disease, Gerstmann-Sträussler-Scheinker syndrome (GSS), and fatal familial
insomnia. GSS is a genetically determined TSE caused by a range of mutations
within the prion protein (PrP) gene. Several animal models, based on the
expression of PrPs carrying mutations analogous to human heritable prion
diseases, support that mutations might predispose PrP to spontaneously misfold.
An adapted Protein Misfolding Cyclic Amplification methodology based on the use
of human recombinant PrP (recPMCA) generated different self-propagating misfolded
proteins spontaneously. These were characterized biochemically and structurally,
and the one partially sharing some of the GSS PrP(Sc) molecular features was
inoculated into different animal models showing high infectivity. This
constitutes an infectious recombinant prion which could be an invaluable model
for understanding GSS. Moreover, this study proves the possibility to generate
recombinant versions of other human prion diseases that could provide a further
understanding on the molecular features of these devastating disorders.