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- W2089855961 abstract "Alzheimer's disease (AD) is the most common form of dementia, characterized by progressive neurodegeneration. Pathogenetic mechanisms, triggered by β-amyloid (Aβ) accumulation, include oxidative stress, derived from energy homeostasis deregulation and involving mitochondria and peroxisomes. We here addressed the oxidative stress status and the elicited cellular response at the onset and during the progression of Aβ pathology, studying the neocortex of Tg2576 model of AD. Age-dependent changes of oxidative damage markers, antioxidant enzymes, and related transcription factors were analysed in relation to the distribution of Aβ peptide and oligomers, by a combined molecular/morphological approach. Nucleic acid oxidative damage, accompanied by defective antioxidant defences, and decreased PGC1α expression are already detected in 3-month-old Tg2576 neurons. Conversely, PPARα is increased in these cells, with its cytoplasmic localization suggesting nongenomic, anti-inflammatory actions. At 6 months, when intracellular Aβ accumulates, PMP70 is downregulated, indicating impairment of fatty acids peroxisomal translocation and their consequent harmful accumulation. In 9-month-old Tg2576 neocortex, Aβ oligomers and acrolein deposition correlate with GFAP, GPX1, and PMP70 increases, supporting a compensatory response, involving astroglial peroxisomes. At severe pathological stages, when senile plaques disrupt cortical cytoarchitecture, antioxidant capacity is gradually lost. Overall, our data suggest early therapeutic intervention in AD, also targeting peroxisomes." @default.
- W2089855961 created "2016-06-24" @default.
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- W2089855961 date "2015-01-01" @default.
- W2089855961 modified "2023-10-16" @default.
- W2089855961 title "Oxidative Stress during the Progression of<i>β</i>-Amyloid Pathology in the Neocortex of the Tg2576 Mouse Model of Alzheimer’s Disease" @default.
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- W2089855961 doi "https://doi.org/10.1155/2015/967203" @default.
- W2089855961 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4418010" @default.
- W2089855961 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25973140" @default.
- W2089855961 hasPublicationYear "2015" @default.
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