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Related Experiment Videos

Transgenic models of prion disease.

M R Scott1, S Supattapone, H O Nguyen

  • 1Institute for Neurodegenerative Diseases, Department of Neurology, University of California, San Francisco 94143-0518, USA.

Archives of Virology. Supplementum
|February 24, 2001
PubMed
Summary
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Bovine spongiform encephalopathy (BSE) prions transmit to humans, causing variant Creutzfeldt-Jakob disease (vCJD). Transgenic mice expressing bovine PrP show no species barrier, supporting human transmission. Miniprions offer insights into prion replication.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Prion Diseases

Background:

  • Growing concern exists regarding bovine spongiform encephalopathy (BSE) transmission to humans, potentially causing variant Creutzfeldt-Jakob disease (vCJD).
  • Understanding prion propagation and species barriers is crucial for public health and disease modeling.

Purpose of the Study:

  • To investigate the transmission of BSE prions from cattle to humans using transgenic mouse models.
  • To explore the role of prion protein (PrP) sequences in prion formation and replication.
  • To develop novel animal models for studying prion diseases.

Main Methods:

  • Generation of transgenic (Tg) mice expressing full-length bovine (Bo) PrP and a redacted form (PrP106).
  • Inoculation of Tg mice with BSE, vCJD, and natural sheep scrapie prions.

Related Experiment Videos

  • Analysis of incubation times, neuropathology, and PrP(Sc) isoforms.

    • Main Results:

    • Tg(BoPrP) mice efficiently propagated BSE prions with no species barrier from cattle.
    • Tg(BoPrP) mice showed indistinguishable disease characteristics when inoculated with BSE and vCJD.
    • A redacted prion protein (PrP106) supported prion propagation, and its 'miniprions' replicated efficiently in Tg(PrP106) mice, especially with coexpressed full-length mouse PrP.

    Conclusions:

    • Findings provide compelling evidence for BSE transmission to humans, causing vCJD.
    • Miniprions exhibit unique replication features, offering new insights into prion disease mechanisms.
    • Coexpression of full-length PrP suggests a novel approach for developing enhanced animal models for prion diseases.