Recombinant human prion protein inhibits prion propagation in vitro.

TitleRecombinant human prion protein inhibits prion propagation in vitro.
Publication TypeJournal Article
Year of Publication2013
AuthorsYuan, J., Y-A. Zhan, R. Abskharon, X. Xiao, M. Camacho Martinez, X. Zhou, G. Kneale, J. Mikol, S. Lehmann, W. K. Surewicz, J. Castilla, J. Steyaert, S. Zhang, Q. Kong, R. B. Petersen, A. Wohlkonig, and W-Q. Zou
JournalSci Rep
Date Published2013

Prion diseases are associated with the conformational conversion of the cellular prion protein (PrP(C)) into the pathological scrapie isoform (PrP(Sc)) in the brain. Both the in vivo and in vitro conversion of PrP(C) into PrP(Sc) is significantly inhibited by differences in amino acid sequence between the two molecules. Using protein misfolding cyclic amplification (PMCA), we now report that the recombinant full-length human PrP (rHuPrP23-231) (that is unglycosylated and lacks the glycophosphatidylinositol anchor) is a strong inhibitor of human prion propagation. Furthermore, rHuPrP23-231 also inhibits mouse prion propagation in a scrapie-infected mouse cell line. Notably, it binds to PrP(Sc), but not PrP(C), suggesting that the inhibitory effect of recombinant PrP results from blocking the interaction of brain PrP(C) with PrP(Sc). Our findings suggest a new avenue for treating prion diseases, in which a patient's own unglycosylated and anchorless PrP is used to inhibit PrP(Sc) propagation without inducing immune response side effects.

Alternate JournalSci Rep
PubMed ID24105336
PubMed Central IDPMC3793212
Grant ListAG-14359 / AG / NIA NIH HHS / United States
R01NS062787 / NS / NINDS NIH HHS / United States
UL1 TR000439 / TR / NCATS NIH HHS / United States
UR8/CCU515004 / / PHS HHS / United States
Research group: