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- W4385879779 abstract "The complex morphology of neurons poses a challenge for proteostasis because the majority of lysosomal degradation machinery is present in the cell soma. In recent years, however, mature lysosomes were identified in dendrites, and a fraction of those appear to fuse with the plasma membrane and release their content to the extracellular space. Here, we report that dendritic lysosomes are heterogeneous in their composition and that only those containing lysosome-associated membrane protein (LAMP) 2A and 2B fuse with the membrane and exhibit activity-dependent motility. Exocytotic lysosomes dock in close proximity to GluN2B-containing N-methyl-D-aspartate-receptors (NMDAR) via an association of LAMP2B to the membrane-associated guanylate kinase family member SAP102/Dlg3. NMDAR-activation decreases lysosome motility and promotes membrane fusion. We find that chaperone-mediated autophagy is a supplier of content that is released to the extracellular space via lysosome exocytosis. This mechanism enables local disposal of aggregation-prone proteins like TDP-43 and huntingtin." @default.
- W4385879779 created "2023-08-17" @default.
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- W4385879779 date "2023-08-01" @default.
- W4385879779 modified "2023-10-17" @default.
- W4385879779 title "Chaperone-mediated autophagy in neuronal dendrites utilizes activity-dependent lysosomal exocytosis for protein disposal" @default.
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- W4385879779 doi "https://doi.org/10.1016/j.celrep.2023.112998" @default.
- W4385879779 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37590146" @default.
- W4385879779 hasPublicationYear "2023" @default.
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