A change in the conformation of prions accompanies the emergence of a new prion strain.

Abstract:

:To investigate the role of the pathogenic prion protein (PrP(Sc)) in controlling susceptibility to foreign prions, two Syrian hamster (SHa) prion strains, Sc237 and DY, were transmitted to transgenic mice expressing chimeric SHa/mouse PrP genes, Tg(MH2M). First passage of SHa(Sc237) prions exhibited prolonged incubation times, diagnostic of a species barrier. PrP(Sc) of the new MH2M(Sc237) strain possessed different structural properties from those of SHa(Sc237), as demonstrated by relative conformational stability measurements. This change was accompanied by a disease phenotype different from the SHa(Sc237) strain. Conversely, transmission of SHa(DY) prions to Tg(MH2M) mice showed no species barrier, and the MH2M(DY) strain retained the conformational and disease-specific properties of SHa(DY). These results suggest a causal relationship between species barriers, changes in PrP(Sc) conformation, and the emergence of new prion strains.

journal_name

Neuron

journal_title

Neuron

authors

Peretz D,Williamson RA,Legname G,Matsunaga Y,Vergara J,Burton DR,DeArmond SJ,Prusiner SB,Scott MR

doi

10.1016/s0896-6273(02)00726-2

subject

Has Abstract

pub_date

2002-06-13 00:00:00

pages

921-32

issue

6

eissn

0896-6273

issn

1097-4199

pii

S0896627302007262

journal_volume

34

pub_type

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