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- W2980487968 abstract "Abstract Mutations in SPG11 , leading to loss of spatacsin function, impair the formation of membrane tubules in lysosomes and cause lysosomal lipid accumulation. However, the full nature of lipids accumulating in lysosomes and the physiological consequences of such accumulation are unknown. Here we show that loss of spatacsin inhibits the formation of tubules on lysosomes and prevents the clearance of cholesterol from this subcellular compartment. Accumulation of cholesterol in lysosomes decreases cholesterol levels in the plasma membrane, enhancing the entry of extracellular calcium by store-operated calcium entry and increasing resting cytosolic calcium levels. Higher cytosolic calcium levels promote the nuclear translocation of the master regulator of lysosomes TFEB, preventing the formation of tubules and the clearance of cholesterol from lysosomes. Our work reveals a homeostatic balance between cholesterol trafficking and cytosolic calcium levels and shows that loss of spatacsin impairs this homeostatic equilibrium." @default.
- W2980487968 created "2019-10-25" @default.
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- W2980487968 date "2019-10-17" @default.
- W2980487968 modified "2023-10-17" @default.
- W2980487968 title "Loss of spatacsin impairs cholesterol trafficking and calcium homeostasis" @default.
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- W2980487968 doi "https://doi.org/10.1038/s42003-019-0615-z" @default.
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