Corona virus induced subacute demyelinating encephalomyelitis in rats: A morphological analysis
Identifieur interne : 000013 ( Istex/Curation ); précédent : 000012; suivant : 000014Corona virus induced subacute demyelinating encephalomyelitis in rats: A morphological analysis
Auteurs : K. Nagashima [Allemagne] ; H. Wege [Allemagne] ; R. Meyermann [Allemagne] ; V. Ter Meulen [Allemagne]Source :
- Acta Neuropathologica [ 0001-6322 ] ; 1978-01-01.
English descriptors
- KwdEn :
- Teeft :
- Acta, Acta neuropathol, Animal model, Astrocyte, Axon, Brain suspension, Corona, Corona virus, Degenerating, Degenerating cells, Degeneration, Demyelinating, Demyelinating lesions, Demyelinating plaques, Demyelination, Different kinds, Early lesions, Electron microscopy, Encephalomyelitis, Endoplasmic reticulum, Glial, Glial cells, Gray matter, Higher magnification, Histological findings, Intracerebral inoculation, Lampert, Lesion, Macrophage, Microtubule, Mononuclear, Mononuclear cell infiltration, Mononuclear cells, Myelin, Myelin sheaths, Naked axons, Necrotic cells, Neuron, Neuropathol, Oligodendrocyte, Optic, Optic chiasma, Optic nerve, Other demyelinating diseases, Perivascular, Perivascular cuffing, Plaque, Plasma cells, Specific tracts, Spinal, Spinal cord, Subacute, Subacute demyelinating encephalomyelitis, Viral, Viral antigen, Virus infection, Virus particles, Weanling, Weanling rats, White matter.
Abstract
Summary: Thirty percent of weanling rats infected with JHM murine corona virus developed a subacute demyelinating encephalomyelitis approximately 3 weeks after intracerebral inoculation. Small demyelinating foci were located in the deep cerebral white matter and large, sharply demarcated demyelinating lesions were detectable in optic chiasma, pons and spinal cord. Axons as well as neurons were well preserved in the demyelinating plaques in areas where the lesions extended to the gray matter. Perivascular cuffings, consisting of plasma cells and mononuclear cells, were frequently found. Viral antigen was found mostly in the white matter and in glial cells, leaving neurons unstained. Electron microscopic studies of the early lesions of white matter disclosed two different kinds of cell degeneration which developed prior to the myelin disruption and mononuclear cell infiltration. One was a small pyknotic cell, which is thought to be an oligodendrocyte and the other is a ballooned cell containing abundant microtubules. Virus particles could be demonstrated only in the latter cell type. Discussion about astrocytes as well as oligodendrocytes was made in relation to the initial stage of demyelination caused by virus infection. This animal model may be useful in the analysis of the mechanisms leading to demyelination in subacute or chronic infections.
Url:
DOI: 10.1007/BF00691641
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<term>Glial cells</term>
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<term>Histological findings</term>
<term>Intracerebral inoculation</term>
<term>Lampert</term>
<term>Lesion</term>
<term>Macrophage</term>
<term>Microtubule</term>
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<term>Mononuclear cell infiltration</term>
<term>Mononuclear cells</term>
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<front><div type="abstract" xml:lang="en">Summary: Thirty percent of weanling rats infected with JHM murine corona virus developed a subacute demyelinating encephalomyelitis approximately 3 weeks after intracerebral inoculation. Small demyelinating foci were located in the deep cerebral white matter and large, sharply demarcated demyelinating lesions were detectable in optic chiasma, pons and spinal cord. Axons as well as neurons were well preserved in the demyelinating plaques in areas where the lesions extended to the gray matter. Perivascular cuffings, consisting of plasma cells and mononuclear cells, were frequently found. Viral antigen was found mostly in the white matter and in glial cells, leaving neurons unstained. Electron microscopic studies of the early lesions of white matter disclosed two different kinds of cell degeneration which developed prior to the myelin disruption and mononuclear cell infiltration. One was a small pyknotic cell, which is thought to be an oligodendrocyte and the other is a ballooned cell containing abundant microtubules. Virus particles could be demonstrated only in the latter cell type. Discussion about astrocytes as well as oligodendrocytes was made in relation to the initial stage of demyelination caused by virus infection. This animal model may be useful in the analysis of the mechanisms leading to demyelination in subacute or chronic infections.</div>
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