Topographic distribution of scrapie amyloid-immunoreactive plaques in chronic wasting disease in captive mule deer (Odocoileus hemionus hemionus) |
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Authors: | D C Guiroy E S Williams R Yanagihara D C Gajdusek |
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Institution: | (1) Laboratory of Central Nervous System Studies, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bldg 36, Room 5B21, 20892 Bethesda, MD, USA;(2) Wyoming State Veterinary Laboratory, Department of Veterinary Sciences, University of Wyoming, 82070 Laramie, WY, USA |
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Abstract: | Summary Chronic wasting disease (CWD), a progressive neurological disorder of captive mule deer, blacktailed deer, hybrids of mule deer and white-tailed deer and Rocky Mountain elk, is characterized neuropathologically by widespread spongiform change of the neuropil, intracytoplasmic vacuolation in neuronal perikarya and astrocytic hypertrophy and hyperplasia. We report the topographic distribution of amyloid plaques reactive to antibodies prepared against scrapie amyloid in CWD-affected captive mule deer (Odocoileus hemionus hemionus). Scrapie amyloid-immunoreactive plaques were found in the cerebral gray and white matter, in deep subcortical nuclei, in isolation or in clusters in areas of vacuolation, and perivascularly, in subpial and subependymal regions. In the cerebellum, immunoreactive amyloid plaques were observed in the molecular, pyramidal and granular layers. Scrapie amyloid-immunoreactive deposits were also seen in neuronal perikarya. Furthermore, amyloid plaques in CWD-affected captive mule deer were alcianophilic at 0.3 M magnesium chloride indicating the presence of weakly to moderately sulfated glycosaminoglycans. Our data corroborate that CWD in captive mule deer belongs to the subacute virus spongiform encephalopathies. |
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Keywords: | Spongiform encephalopathy Scrapie amyloid Amyloid plaques |
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