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Related Experiment Videos

Synaptic pathology in Borna disease virus persistent infection.

D Gonzalez-Dunia1, M Watanabe, S Syan

  • 1Unité des Virus Lents, CNRS URA 1930, Institut Pasteur, Paris, France. ddune@pasteur.fr

Journal of Virology
|March 23, 2000
PubMed
Summary

Borna disease virus (BDV) infection in newborn rats causes persistent brain infections and behavioral changes. The study reveals BDV disrupts neuroplasticity, leading to synaptic damage before neuronal loss in the brain.

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Area of Science:

  • Neuroscience
  • Virology
  • Pathology

Background:

  • Borna disease virus (BDV) causes persistent brain infections in newborn rats, leading to behavioral and neuroanatomical abnormalities.
  • BDV-induced brain damage occurs without lymphoid infiltrates and is localized to specific brain regions.

Purpose of the Study:

  • To investigate if synaptic structure damage precedes neuronal loss in neonatally BDV-infected rats.
  • To analyze the impact of BDV infection on neuroplasticity markers.

Main Methods:

  • Analysis of growth-associated protein 43 and synaptophysin expression levels at various time points post-infection.
  • Assessment of neuronal loss in cortical and limbic system structures.

Main Results:

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  • BDV infection led to a progressive decrease in the expression of synaptic markers (growth-associated protein 43 and synaptophysin).
  • A significant loss of cortical neurons was observed following the decline in synaptic marker expression.
  • BDV infection interferes with neuroplasticity in specific brain cell populations.

    • Conclusions:

    • BDV-induced synaptic damage precedes neuronal loss in the developing brain.
    • Interference with neuroplasticity may disrupt the supply of essential factors for neuronal survival.
    • This mechanism could underlie the observed neuroanatomical and behavioral abnormalities in BDV infection.