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• W62275226 abstract "The neuronal lysosomal system is a major degradative pathway, induced by cell stress and closely linked to Alzheimer disease (AD) and other neurodegenerative diseases. Here, we show that mutations of presenilin (PS) 1 and 2, which cause familial early-onset AD (FAD), induce more severe lysosomal system neuropathology in humans than does sporadic AD (SAD). Cathepsin D and B levels were higher in PS-FAD neocortex than in SAD and, unlike neurons in SAD, expressed higher levels of the cation-independent mannose-6-phosphate receptor. Lysosomal pathology was also evident in more populations of neurons in PS-FAD brains, including the less vulnerable neurons in laminae II and IV and affected neurons contained high numbers of hydrolase-positive vesicular compartments with a broader range of abnormal morphology. In transgenic mice expressing mutant amyloid precursor protein (APPswe), introducing mutant PSI significantly upregulated the lysosomal system in neocortical and hippocampal neurons. This upregulation, though milder in severity, resembled that seen in human PS-FAD. Accumulation of hydrolases in dystrophic neurites in senile plaques was particularly strong, suggesting that amyloid deposition may be a stimulus for local mobilization of the lysosomal system. PS1 mice lacking the APPswe transgene also had a mild lysosomal response in some neuronal populations, which was not seen in the APPswe mice. Our findings suggest that presenilin mutations have amyloid-independent effects on the lysosomal system, which are synergistic with the lysosomal system pathology that is associated with beta-amyloid." @default.
• W62275226 created "2016-06-24" @default.
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• W62275226 date "2004-08-01" @default.
• W62275226 modified "2023-10-10" @default.
• W62275226 title "Presenilin Mutations in Familial Alzheimer Disease and Transgenic Mouse Models Accelerate Neuronal Lysosomal Pathology" @default.
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• W62275226 doi "https://doi.org/10.1093/jnen/63.8.821" @default.
• W62275226 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15330337" @default.
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