Summary
Immunocytochemical staining with monoclonal antibodies to the β-protein on tissue sections which have been pretreated with formic acid is not only a very specific but also a highly sensitive method for the detection of amyloid deposits in the brains of Alzheimer's disease victims. We report here a spectrum of morphological appearance of the brain amyloid deposits which are one of the main histopathological correlates of this disorder. Deposits of the β-protein are not only found in the well-known lesions [congophilic angiopathy and senile (neuritic) plaques] but are also seen under various morphological forms for which the word “plaques” does not appear an appropriate term: amyloid fibrils are found as large areas of diffuse infiltration of the neuropil, as ribbon-like infiltration in the subpial layer of the cerebral cortex, as granular deposits in the white matter, as diffuse deposits in the molecular layer of the cerebellum and the basal ganglia and as star-shaped deposits in the cerebellar Purkinje cell layer. The morphology of these deposits seems to depend on the cyto-and fibroarchitectonics of the brain region in which they are found, on the amount of amyloid deposited, and also on the type of staining technique used. It is only under specific circumstances that the deposition of amyloid in the neuropil is accompanied by the formation of paired helical filaments in nerve cell processes and their parent perikarya. In conclusion, our studies suggest that the extent of brain amyloidosis in Alzheimer's disease is much wider than so far appreciated.
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Supported in part by grants 5-AGO-4220-05 and 5-HD-22634-02 from the National Institutes of Heath
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Wisniewski, H.M., Bancher, C., Barcikowska, M. et al. Spectrum of morphological appearance of amyloid deposits in Alzheimer's disease. Acta Neuropathol 78, 337–347 (1989). https://doi.org/10.1007/BF00688170
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DOI: https://doi.org/10.1007/BF00688170