Abstract：
:Accidental transmission of prions during neurosurgery has been reported as a consequence of re-using contaminated surgical instruments. Several decontamination methods have been studied using the 263K-hamster prion; however, no studies have directly evaluated human prions. A newly developed in vitro amplification system, designated real-time quaking-induced conversion (RT-QuIC), has allowed the activity of abnormal prion proteins to be assessed within a few days. RT-QuIC using human recombinant prion protein (PrP) showed high sensitivity for prions as the detection limit of our assay was estimated as 0.12 fg of active prions. We applied this method to detect human prion activity on stainless steel wire. When we put wires contaminated with human Creutzfeldt-Jakob disease brain tissue directly into the test tube, typical PrP-amyloid formation was observed within 48 hours, and we could detect the activity of prions at 50% seeding dose on the wire from 10(2.8) to 10(5.8) SD50. Using this method, we also confirmed that the seeding activities on the wire were removed following treatment with NaOH. As seeding activity closely correlated with the infectivity of prions using the bioassay, this wire-QuIC assay will be useful for the direct evaluation of decontamination methods for human prions.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Mori T,Atarashi R,Furukawa K,Takatsuki H,Satoh K,Sano K,Nakagaki T,Ishibashi D,Ichimiya K,Hamada M,Nakayama T,Nishida Ndoi
10.1038/srep24993subject
Has Abstractpub_date
2016-04-26 00:00:00pages
24993issn
2045-2322pii
srep24993journal_volume
6pub_type
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