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J Virol. 2011 Mar;85(6):2813-7. doi: 10.1128/JVI.02451-10. Epub 2011 Jan 12.

Superparamagnetic nanoparticle capture of prions for amplification.

Author information

1
Department of Biochemistry, 7200 Vail Building, Dartmouth Medical School, Hanover, New Hampshire 03755, USA.

Abstract

Prion diseases are associated with the presence of PrP(Sc), a disease-associated misfolded conformer of the prion protein. We report that superparamagnetic nanoparticles bind PrP(Sc) molecules efficiently and specifically, permitting magnetic separation of prions from a sample mixture. Captured PrP(Sc) molecules retain the activity to seed protein misfolding cyclic amplification (PMCA) reactions, enabling the rapid concentration of dilute prions to improve detection. Furthermore, superparamagnetic nanoparticles clear contaminated solutions of PrP(Sc). Our findings suggest that coupling magnetic nanoparticle capture with PMCA could accelerate and improve prion detection. Magnetic nanoparticles may also be useful for developing a nontoxic prion decontamination method for biologically derived products.

PMID:
21228242
PMCID:
PMC3067916
DOI:
10.1128/JVI.02451-10
[Indexed for MEDLINE]
Free PMC Article

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