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Amyloid and intracellular accumulation of BRI<sub>2</sub>

Author:
Holly J. Garringer  Neeraja Sammeta  Adrian Oblak  Bernardino Ghetti  Ruben Vidal  


Journal:
Neurobiology of Aging


Issue Date:
2017


Abstract(summary):

Abstract Familial British dementia (FBD) and familial Danish dementia (FDD) are caused by mutations in the BRI 2 gene. These diseases are characterized clinically by progressive dementia and ataxia and neuropathologically by amyloid deposits and neurofibrillary tangles. Herein, we investigate BRI 2 protein accumulation in FBD, FDD, Alzheimer disease and Gerstmann-Sträussler-Scheinker disease. In FBD and FDD, we observed reduced processing of the mutant BRI 2 pro-protein, which was found accumulating intracellularly in the Golgi of neurons and glial cells. In addition, we observed an accumulation of a mature form of BRI 2 protein in dystrophic neurites, surrounding amyloid cores. Accumulation of BRI 2 was also observed in dystrophic neurites of Alzheimer disease and Gerstmann-Sträussler-Scheinker disease cases. Although it remains to be determined whether intracellular accumulation of BRI 2 may lead to cell damage in these degenerative diseases, our study provides new insights into the role of mutant BRI 2 in the pathogenesis of FBD and FDD and implicates BRI 2 as a potential indicator of neuritic damage in diseases characterized by cerebral amyloid deposition.


Page:
90-90


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