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Cited by 247

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Amyloid Fibrils of Mammalian Prion Protein Are Highly Toxic to Cultured Cells and Primary Neurons

Open access
Novitskaya, Vera, Bocharova, Olga V., Bronstein, Igor, Baskakov, Ilia V.·2006·Journal of Biological Chemistry

Abstract

A growing body of evidence indicates that small, soluble oligomeric species generated from a variety of proteins and peptides rather than mature amyloid fibrils are inherently highly cytotoxic. Here, we show for the first time that mature amyloid fibrils produced from full-length recombinant mammalian prion protein (rPrP) were highly toxic to cultured cells and primary hippocampal and cerebella neurons. Fibrils induced apoptotic cell death in a time- and dose-dependent manner. The toxic effect of fibrils was comparable with that exhibited by soluble small beta-oligomers generated from the same protein. Fibrils prepared from insulin were not toxic, suggesting that the toxic effect was not solely due to the highly polymeric nature of the fibrillar form. The cell death caused by rPrP fibrils or beta-oligomers was substantially reduced when expression of endogenous PrP(C) was down-regulated by small interfering RNAs. In opposition to the beta-oligomer and amyloid fibrils of rPrP, the monomeric alpha-helical form of rPrP stimulated neurite out-growth and survival of neurons. These studies illustrated that both soluble beta-oligomer and amyloid fibrils of the prion protein are intrinsically toxic and confirmed that endogenously expressed PrP(C) is required for mediating the toxicity of abnormally folded external PrP aggregates.

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Metadata

Authors
Novitskaya, V., Bocharova, O. V., Bronstein, I., & Baskakov, I. V.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2006-05
Volume
281
Issue
19
Pages
13828-13836
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1995609479
Cited by
247
References
6
FWCI
7.74
Type
journal article
Language
en
Open access
hybrid

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Novitskaya, V., Bocharova, O. V., Bronstein, I., & Baskakov, I. V. (2006). Amyloid Fibrils of Mammalian Prion Protein Are Highly Toxic to Cultured Cells and Primary Neurons. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m511174200

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