2 research outputs found

    Molekulargenetische, histologische und immunhistologische Untersuchungen an alten Feuchtpräparaten der Pathologisch-anatomischen Lehrsammlung Rostock

    Get PDF
    Ziel dieser Studie war es, langjährig gelagerte Feuchtpräparate auf ihre Eignung für moderne pathologische Untersuchungsmethoden zu testen. 44 Feuchtpräparate von 1902 bis 1964 wurden verwendet. Es wurden H&E-Schnitte angefertigt sowie Mutationsanalysen und molekulare Erregernachweise durchgeführt. Aus 86 % der Präparate ließ sich amplifizierbare DNA isolieren. Erregernachweise gelangen in über 80 % der Präparate. In dieser Studie wird deutlich, dass pathologische Sammlungen weiterhin großes Potential für Forschung und Lehre bergen

    Mitophagy inhibits amyloid-β and tau pathology and reverses cognitive deficits in models of Alzheimer's disease

    No full text
    Accumulation of damaged mitochondria is a hallmark of aging and age-related neurodegeneration, including Alzheimer’s disease (AD). The molecular mechanisms of impaired mitochondrial homeostasis in AD are being investigated. Here we provide evidence that mitophagy is impaired in the hippocampus of AD patients, in induced pluripotent stem cell-derived human AD neurons, and in animal AD models. In both amyloid-β (Aβ) and tau Caenorhabditis elegans models of AD, mitophagy stimulation (through NAD+ supplementation, urolithin A, and actinonin) reverses memory impairment through PINK-1 (PTEN-induced kinase-1)-, PDR-1 (Parkinson’s disease-related-1; parkin)-, or DCT-1 (DAF-16/FOXO-controlled germline-tumor affecting-1)-dependent pathways. Mitophagy diminishes insoluble Aβ1–42 and Aβ1–40 and prevents cognitive impairment in an APP/PS1 mouse model through microglial phagocytosis of extracellular Aβ plaques and suppression of neuroinflammation. Mitophagy enhancement abolishes AD-related tau hyperphosphorylation in human neuronal cells and reverses memory impairment in transgenic tau nematodes and mice. Our findings suggest that impaired removal of defective mitochondria is a pivotal event in AD pathogenesis and that mitophagy represents a potential therapeutic intervention
    corecore