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Prion Diseases pp 113-124 | Cite as

Transgenic models of prion disease

  • M. R. Scott
  • S. Supattapone
  • H.-O. B. Nguyen
  • S. J. DeArmond
  • S. B. Prusiner
Chapter
Part of the Archives of Virology. Supplementa book series (ARCHIVES SUPPL, volume 16)

Summary

There is growing concern that bovine spongiform encephalopathy (BSE) may have passed from cattle to humans, resulting in ~70 cases of an atypical, variant zCJD (vCJD) in teenagers and young adults. We report here that transgenic (Tg) mice expressing full-length bovine (Bo) PrP serially propagate BSE prions and that there is no species barrier for transmission from cattle to Tg(BoPrP) mice. Surprisingly, these same mice were also highly susceptible to vCJD and natural sheep scrapie. The incubation times (~25O d), neuropathology, and PrPSc isoforms in Tg(BoPrP) mice inoculated with vCJD and BSE brain extracts were indistinguishable and differed dramatically from those seen in these mice injected with natural scrapie. In efforts to identify PrP sequences required for prion formation, we found that a redacted prion protein of only 106 amino acids (PrP106) containing two large deletions supported prion propagation. In Tg(PrP106) mice, an artificial transmission barrier for the passage of full-length mouse prions was diminished by the coexpression of full-length wt MoPrPc, suggesting that wt MoPrP acts in trans to accelerate the replication of “miniprions” containing PrPSc106. Following a single passage (~300 d) in Tg(PrP106) mice, the miniprions efficiently transmitted disease to Tg(PrP106) mice after only ~66 days. Our findings with Tg(BoPrP) mice provide compelling evidence that prions from cattle with BSE have infected humans and caused fatal neurodegeneration, the unique features of miniprions offer new insights into the mechanism of prion replication, and the trans-acting effects of full-length PrP coexpression suggest a new approach to the development of even more efficient animal models for prion diseases.

Keywords

Prion Protein Prion Disease Bovine Spongiform Encephalo Primary Transmission Species Barrier 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Wien 2000

Authors and Affiliations

  • M. R. Scott
    • 1
    • 2
  • S. Supattapone
    • 1
    • 2
  • H.-O. B. Nguyen
    • 1
    • 2
  • S. J. DeArmond
    • 1
    • 4
  • S. B. Prusiner
    • 1
    • 2
    • 3
  1. 1.Institute for Neurodegenerative DiseasesUniversity of CaliforniaSan FranciscoUSA
  2. 2.Departments of NeurologyUniversity of CaliforniaSan FranciscoUSA
  3. 3.Departments of Biochemistry and BiophysicsUniversity of CaliforniaSan FranciscoUSA
  4. 4.Departments of PathologyUniversity of CaliforniaSan FranciscoUSA

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