Restricted expression of viral surface proteins in canine distemper encephalitis

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ID: 111097
1970
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Abstract
Sixteen dogs with naturally occurring acute and chronic canine distemper virus (CDV) encephalitis were examined immunohistochemically for the presence of the five major CDV-specific proteins in the central nervous system. Monoclonal antibodies (mAbs) directed against two, three, four and five epitopes of the nucleo-(N), phospho- (P), fusion (F), and hemagglutinin (H) protein, respectively, and a polyclonal monospecific antibody recognizing the matrix (M) protein were used. Both core proteins and their epitopes, three F protein epitopes and the M protein were demonstrated in all animals examined. A fourth F protein epitope was found only in 13 animals. The H-2 and H-3 epitope of the H protein were detected in 15, the H-1 and H-5 epitope in 14, and the H-4 epitope in 3 animals. All viral proteins were observed in the same types of brain cells including neurons and astrocytes. The N and P protein were demonstrated in nucleus, cytoplasm and cell processes, whereas M, H and F protein were observed in the cytoplasm only and rarely in cell processes. In addition, the M protein was detected occasionally in the nucleus of neurons and reactive astrocytes. Intralesional distribution of CDV-specific proteins varied between core and surface proteins. In acute and subacute lesions without associated inflammation, expression of the M, H and F protein was only slightly diminished compared to the N and P protein. However, plaques with severe inflammation were either devoid of viral antigen or exhibited N-and P protein-specific immunoreactivity exclusively at the periphery, whereas expression of surface proteins was severely reduced or absent. These results are suggestive of restricted synthesis of CDV envelope proteins in acute, and more prominent in chronic, distemper encephalitis.
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Authors Susanne Alldinger;W. Baumgärtner;C. Örvell;Susanne Alldinger;W. Baumgärtner;C. Örvell;
Journal acta neuropathologica
Year 1970
DOI
doi:10.1007/BF00334674
URL
https://link.springer.com/article/10.1007/BF00334674
Keywords
pathology neurosciences

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