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• W2034364849 abstract "Although genetic studies have demonstrated that β-amyloid protein (Aβ) plays a pivotal role in Alzheimer's disease (AD) pathogenesis, how aging contributes to AD onset remains unclear. Moreover, growing evidence suggests that Aβ-independent mechanisms, such as altered intracellular signaling cascades and impaired neurotransmitter release, also are likely involved in this process. Cytoplasmic dynein, a microtubule-based motor protein, mediates minus end-directed vesicle transport via interactions with dynactin, another microtubule-associated protein. We previously showed that normal aging attenuates the interaction between dynein-dynactin complexes in monkey brain and that dynein dysfunction reproduces age-dependent endocytic disturbances, resulting in intracellular Aβ accumulation. In this study, we report that dynein dysfunction disrupts not only retrograde transport of neurotrophic receptors but also anterograde transport of synaptic vesicles, which occurs concomitantly with an increase in Rab3 GTPase levels. Additionally, synaptic vesicle docking was perturbed via enhanced endocytosis. Dynein dysfunction also induced neuritic swelling, which is accompanied by a significant accumulation of neurofilaments. Moreover, we also confirmed that the dynein dysfunction-related disturbances are associated with aging in monkey brains and that age-dependent endocytic disturbances precede Aβ abnormality. These findings suggest that dynein dysfunction can alter neuronal activity via endocytic disturbances and may underlie age-dependent impairment of cognitive function. Moreover, in the presence of other risk factors, such as intracellular Aβ accumulation, dynein dysfunction may contribute to the development of AD." @default.
• W2034364849 created "2016-06-24" @default.
• W2034364849 creator A5046132734 @default.
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• W2034364849 date "2012-02-01" @default.
• W2034364849 modified "2023-10-16" @default.
• W2034364849 title "Dynein Dysfunction Disrupts Intracellular Vesicle Trafficking Bidirectionally and Perturbs Synaptic Vesicle Docking via Endocytic Disturbances" @default.
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• W2034364849 doi "https://doi.org/10.1016/j.ajpath.2011.10.037" @default.
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• W2034364849 hasPublicationYear "2012" @default.
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