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Journal Article
Review
Linking mitochondrial dysfunction to neurodegeneration in lysosomal storage diseases.
Journal of Inherited Metabolic Disease 2017 September
Lysosomal storage diseases (LSD) are inborn errors of metabolism resulting in multisystem disease. Central nervous system involvement, often with progressive neurodegeneration, accounts for a large portion of the morbidity and mortality seen in many LSD. Available treatments fail to prevent or correct neurologic symptoms and decline. Emerging evidence points to an important role for mitochondrial dysfunction in the pathogenesis and progression of LSD-associated neurodegeneration. Mitochondrial dysfunction in LSD is characterized by alterations in mitochondrial mass, morphology and function. Disturbed mitochondrial metabolism in the CNS may lead to excessive production of mitochondrial reactive oxygen species and dysregulated calcium homeostasis. These metabolic disturbances ultimately result in mitochondria-induced apoptosis and neuronal degeneration. Here, we review the current evidence for mitochondrial dysfunction in neuronal models of seven LSD, including GM1-gangliosidosis, mucopolysaccharidosis IIIC, multiple sulfatase deficiency, Krabbe disease, Gaucher disease, Niemann Pick disease type C and the neural ceroid lipofuscinoses and outline current experimental therapies aimed at restoring mitochondrial function and neuroprotection in LSD.
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