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Investigating the Spreading and Toxicity of Prion-like Proteins Using the Metazoan Model Organism C. elegans
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Investigating the Spreading and Toxicity of Prion-like Proteins Using the Metazoan Model Organism C. elegans

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Prion diseases

Richard T Johnson1

  • 1Pathology 627, The Johns Hopkins University School of Medicine & Bloomberg School of Public Health, Baltimore, MD 21287, USA. rtj@jhmi.edu

The Lancet. Neurology
|September 20, 2005
PubMed

Insights

Prion diseases are fatal neurodegenerative disorders caused by infectious prion proteins. Transmission varies across human and animal diseases, complicating risk assessment and prediction.

Area of Science:

  • Neuroscience
  • Infectious Diseases
  • Molecular Biology

Background:

  • Prion diseases are fatal neurodegenerative disorders affecting the nervous system.
  • They are caused by a pathogenic isoform of the prion protein, a normal cell membrane constituent.
  • Creutzfeldt-Jakob disease (CJD) is the most common human prion disease.

Purpose of the Study:

  • To review the modes of transmission and risk factors associated with human and animal prion diseases.
  • To highlight the challenges in assessing and predicting the spread of prion diseases.
  • To understand the implications of prion protein's pathogenic isoform.

Main Methods:

  • Review of scientific literature on prion diseases.
  • Analysis of transmission routes in human and animal prionopathies.
  • Examination of factors influencing disease spread and risk.

Main Results:

  • Human prion diseases include sporadic CJD, inherited forms, and iatrogenic transmission.
  • Consumption of infected material is linked to kuru and variant CJD.
  • Animal prion diseases like BSE and CWD are transmitted via contact or feed.

Conclusions:

  • Prion disease transmission routes are diverse, including sporadic, inherited, iatrogenic, and consumption-based.
  • Animal prion diseases spread through direct contact or contaminated feed.
  • Variable transmission, species barriers, infectivity distribution, and strain variations complicate risk assessment and future predictions.

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