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- W2013371339 abstract "<b>Objective:</b> Hereditary spastic paraplegias (HSPs) are very heterogeneous inherited neurodegenerative disorders. Our group recently identified <i>ZFYVE26</i> as the gene responsible for one of the clinical and genetic entities, SPG15. Our aim was to describe its clinical and mutational spectra. <b>Methods:</b> We analyzed all exons of <i>SPG15</i>/<i>ZFYVE26</i> gene by direct sequencing in a series of 60 non-SPG11 HSP subjects with associated mental or MRI abnormalities, including 30 isolated cases. The clinical data were collected through the SPATAX network. <b>Results:</b> We identified 13 novel truncating mutations in <i>ZFYVE26</i>, 12 of which segregated at the homozygous or compound heterozygous states in 8 new SPG15 families while 1 was found at the heterozygous state in a single family. Two of 3 splice site mutations were validated on mRNA of 2 patients. The SPG15 phenotype in 11 affected individuals was characterized by early onset HSP, severe progression of the disease, and mental impairment dominated by cognitive decline. Thin corpus callosum and white matter hyperintensities were MRI hallmarks of the disease in this series. <b>Conclusions:</b> The mutations are truncating, private, and distributed along the entire coding sequence of <i>ZFYVE26</i>, which complicates the analysis of this gene in clinical practice. In our series of patients with hereditary spastic paraplegia–thin corpus callosum, the largest analyzed so far, SPG15 was the second most frequent form (11.5%) after SPG11. Both forms share similar clinical and imaging presentations with very few distinctions, which are, however, insufficient to infer the molecular diagnosis when faced with a single patient." @default.
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- W2013371339 date "2009-10-05" @default.
- W2013371339 modified "2023-10-07" @default.
- W2013371339 title "SPG15 is the second most common cause of hereditary spastic paraplegia with thin corpus callosum" @default.
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- W2013371339 doi "https://doi.org/10.1212/wnl.0b013e3181bacf59" @default.
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