Copper is toxic to PrP-ablated mice and exacerbates disease in a mouse model of E200K genetic prion disease

Tamar Canello, Yael Friedman-Levi, Michal Mizrahi, Orli Binyamin, Eran Cohen, Kati Frid, Ruth Gabizon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The pathogenesis of the diverse forms of prion disease was attributed solely to the accumulation of the misfolded PrP forms, and not to the potential loss of normal PrP C function during disease propagation. In this respect, it was also not established whether mutant PrPs linked to genetic prion diseases, as is the case for E200K PrP, preserve the function of PrP C. We now show that fibroblasts generated from both PrP-ablated mice and TgMHu2ME199K, a transgenic mouse line mimicking E200KCJD, were significantly more sensitive to copper toxicity than wt fibroblasts. Long-term administration of copper significantly accelerated the onset and progression of spontaneous prion disease in TgMHu2ME199K mice and caused marked irritability and cerebellar associated tip-toe walking in PrP 0/0 mice, while wt mice were not affected. Our results are consistent with the hypothesis that a functional PrP C is required to protect cells from high levels of copper, and that its substitution for a nonfunctional mutant PrP may accelerate the onset of genetic prion disease during oxidative insults.

Original languageAmerican English
Pages (from-to)1010-1017
Number of pages8
JournalNeurobiology of Disease
Volume45
Issue number3
DOIs
StatePublished - Mar 2012
Externally publishedYes

Bibliographical note

Funding Information:
This research was supported by a grant from the ISF-Morasha Foundation .

Keywords

  • Copper
  • Fibroblasts
  • Genetic
  • Oxidation
  • Prion
  • Transgenic

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