ZFYVE26/SPASTIZIN: a close link between complicated hereditary spastic paraparesis and autophagy.
Defective autophagy is associated with neurodegenerative disorders including Alzheimer, Parkinson and Huntington diseases, amyotrophic lateral sclerosis and SCA (spinocerebellar ataxias). Autophagy defects were detected also in SPG49, a complicated form of hereditary spastic paraparesis (cHSP) associated with mutations in the TECPR2 gene, suggesting a role of autophagy also in this heterogeneous group of neurodegenerative diseases. We recently found defective autophagy in SPG15, another HSP subtype associated with mutations in the ZFYVE26/SPG15 gene. Patient-derived cells (fibroblasts/lymphoblasts) carrying different ZFYVE26 mutations show accumulation of immature autophagosomes and increased MAP1LC3B-II and SQSTM1/p62 levels. These findings indicate that ZFYVE26 is a key determinant of autophagosome maturation, which is impaired when the protein is defective or absent. Replication of these findings in primary neurons supports the relevance of defective autophagy in SPG15-related neurodegeneration.
['Vantaggiato|Chiara|C|', 'Clementi|Emilio|E|', 'Bassi|Maria Teresa|MT|']
D048868:Adaptor Proteins, Signal Transducing D001343:Autophagy D001921:Brain D002352:Carrier Proteins D006801:Humans D009154:Mutation D019636:Neurodegenerative Diseases D020336:Paraparesis, Spastic D010588:Phagosomes D000071456:Sequestosome-1 Protein
ZFYVE26/SPASTIZIN complicated hereditary spastic paraparesis autophagy SPG15 autophagosome maturation BECN1/Beclin 1