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• W2909121401 endingPage "e0210617" @default.
• W2909121401 startingPage "e0210617" @default.
• W2909121401 abstract "The major cellular clearance pathway for organelle and unwanted proteins is the autophagy-lysosome pathway (ALP). Lysosomes not only house proteolytic enzymes, but also traffic organelles, sense nutrients, and repair mitochondria. Mitophagy is initiated by damaged mitochondria, which is ultimately degraded by the ALP to compensate for ATP loss. While both systems are dynamic and respond to continuous cellular stressors, most studies are derived from animal models or cell based systems, which do not provide complete real time data about cellular processes involved in the progression of lysosomal storage diseases in patients. Gaucher and Fabry diseases are rare sphingolipid disorders due to the deficiency of the lysosomal enzymes; glucocerebrosidase and α-galactosidase A with resultant lysosomal dysfunction. Little is known about ALP pathology and mitochondrial function in patients with Gaucher and Fabry diseases, and the effects of enzyme replacement therapy (ERT). Studying blood mononuclear cells (PBMCs) from patients, we provide in vivo evidence, that regulation of ALP is defective. In PBMCs derived from Gaucher patients, we report a decreased number of autophagic vacuoles with increased cytoplasmic localization of LC3A/B, accompanied by lysosome accumulation. For both Gaucher and Fabry diseases, the level of the autophagy marker, Beclin1, was elevated and ubiquitin binding protein, SQSTM1/p62, was decreased. mTOR inhibition did not activate autophagy and led to ATP inhibition in PBMCs. Lysosomal abnormalities, independent of the type of the accumulated substrate suppress not only autophagy, but also mitochondrial function and mTOR signaling pathways. ERT partially restored ALP function, LC3-II accumulation and decreased LC3-I/LC3-II ratios. Levels of lysosomal (LAMP1), autophagy (LC3), and mitochondrial markers, (Tfam), normalized after ERT infusion. In conclusion, there is mTOR pathway dysfunction in sphingolipidoses, as observed in both PBMCs derived from patients with Gaucher and Fabry diseases, which leads to impaired autophagy and mitochondrial stress. ERT partially improves ALP function." @default.
• W2909121401 created "2019-01-25" @default.
• W2909121401 creator A5057608759 @default.
• W2909121401 creator A5060912337 @default.
• W2909121401 creator A5067876029 @default.
• W2909121401 creator A5091258654 @default.
• W2909121401 date "2019-01-11" @default.
• W2909121401 modified "2023-10-18" @default.
• W2909121401 title "Impaired autophagic and mitochondrial functions are partially restored by ERT in Gaucher and Fabry diseases" @default.
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• W2909121401 doi "https://doi.org/10.1371/journal.pone.0210617" @default.
• W2909121401 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6329517" @default.
• W2909121401 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30633777" @default.
• W2909121401 hasPublicationYear "2019" @default.
• W2909121401 type Work @default.

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