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- W4200396802 abstract "Summary Palmitoylation and depalmitoylation are the dichotomic processes of lipid modification regulating protein trafficking, recycling, and degradation, thereby controlling proteostasis. Despite our understanding of palmitoylation, depalmitoylation is far less studied. Here, we study a lysosomal depalmitoylating enzyme, palmitoyl-protein thioesterase 1 (PPT1), associated with the devastating neurodegenerative condition CLN1 disease and show that dark-rearing Ppt1 -/- mice, which induces synaptic upscaling in vivo , worsen the symptoms. In Ppt1 -/- cortical neurons, upscaling induction triggers exaggerated responses of synaptic calcium-permeable AMPA receptors composed of palmitoylated GluA1 subunits. Consequently, Ppt1 -/- visual cortex exhibits hypersynchrony in vivo . Remarkably, we also find an overload of palmitoylated A-kinase anchor protein 5 (Akap5) in Ppt1 -/- mouse brains, leading to microglial activation through NFAT. These findings indicate Ppt1 acts as a gatekeeper of homeostatic plasticity by regulating the proteostasis of palmitoylated synaptic proteins. Moreover, our results suggest that perturbed depalmitoylation results in neuroinflammation, which is common to neurodegenerative diseases." @default.
- W4200396802 created "2021-12-31" @default.
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- W4200396802 date "2021-12-17" @default.
- W4200396802 modified "2023-10-16" @default.
- W4200396802 title "Loss of Depalmitoylation Exaggerates Synaptic Upscaling and Leads to Neuroinflammation in a Lysosomal Storage Disease" @default.
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