Klemm, Helen MJ, Welton, Jeremy M, Masters, Colin L ORCID: 0000-0003-3072-7940, Klug, Genevieve M, Boyd, Alison, Hill, Andrew F ORCID: 0000-0001-5581-2354, Collins, Steven J and Lawson, Victoria A ORCID: 0000-0002-7362-7176 (2012) The prion protein preference of sporadic Creutzfeldt-Jakob disease subtypes. Journal of Biological Chemistry, 287 (43). pp. 36465-36472. ISSN 0021-9258

Abstract

Sporadic Creutzfeldt-Jakob disease (CJD) is the most prevalent manifestation of the transmissible spongiform encephalopathies or prion diseases affecting humans. The disease encompasses a spectrum of clinical phenotypes that have been correlated with molecular subtypes that are characterized by the molecular mass of the protease-resistant fragment of the disease-related conformation of the prion protein and a polymorphism at codon 129 of the gene encoding the prion protein. A cell-free assay of prion protein misfolding was used to investigate the ability of these sporadic CJD molecular subtypes to propagate using brain-derived sources of the cellular prion protein (PrP C). This study confirmed the presence of three distinct sporadic CJD molecular subtypes with PrPC substrate requirements that reflected their codon 129 associations in vivo. However, the ability of a sporadic CJD molecular subtype to use a specific PrPC substrate was not determined solely by codon 129 as the efficiency of prion propagation was also influenced by the composition of the brain tissue from which the PrPC substrate was sourced, thus indicating that nuances in PrPC or additional factors may determine sporadic CJD subtype. The results of this study will aid in the design of diagnostic assays that can detect prion disease across the diversity of sporadic CJD subtypes.

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