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Burrowing into prion disease.

R M Deacon1, J M Raley, V H Perry

  • 1Department of Experimental Psychology, University of Oxford, South Parks Road, Oxford OX1 3UD, UK.

Neuroreport
|July 4, 2001
PubMed
Summary
This summary is machine-generated.

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Scrapie infection in mice caused increased activity and decreased burrowing behavior, a sensitive indicator of preclinical prion disease. This behavioral change preceded later motor impairments, highlighting its utility in early detection.

Area of Science:

  • Neuroscience
  • Prion Disease Research
  • Animal Behavior

Background:

  • Prion diseases, like scrapie, are neurodegenerative disorders.
  • Early detection of prion diseases is crucial for understanding pathogenesis and developing treatments.
  • Ethological measures offer objective assessments of neurological function.

Purpose of the Study:

  • To investigate the utility of burrowing behavior as an early, objective measure of preclinical prion disease in a mouse model.
  • To correlate changes in burrowing behavior with other behavioral and motor alterations following scrapie infection.

Main Methods:

  • Intra-hippocampal injection of scrapie-infected brain homogenate into mice.
  • Monitoring of open field activity and burrowing behavior (food displacement from a tube).

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  • Assessment of general motor impairments at later time points.

    • Main Results:

    • Increased open field activity was observed around 12 weeks post-injection.
    • Burrowing behavior significantly decreased concurrently with increased activity.
    • Motor impairments became apparent later, around 18 weeks post-injection.
    • Decreased burrowing preceded the onset of general motor dysfunction.

    Conclusions:

    • Burrowing behavior is a sensitive, objective, and early indicator of preclinical prion disease in mice.
    • This ethological measure is not dependent on motor dysfunction and can be used independently of food restriction.
    • Burrowing assays show potential for use in various research areas, including aging, Alzheimer's disease models, and pharmacology.