Abstract
Hereditary spastic paraplegias (HSPs) comprise a group of neurodegenerative disorders characterized by weakness and leg spasticity. LYST is responsible for Chédiak–Higashi syndrome (CHS), which exhibits partial oculocutaneous albinism, primary immunodeficiency, and bleeding tendency in childhood. Although neurological symptoms of CHS also appear in adulthood, a phenotype of spastic paraplegia has rarely been reported in CHS. In this study, we investigated LYST mutations in 387 HSP patients through the Japan Spastic Paraplegia Research Consortium to clarify the frequency of LYST mutations in HSP, finding six adult patients with LYST mutations in four HSP families. They exhibited intellectual disability, cerebellar ataxia, neuropathy, and pyramidal signs. Meanwhile, only 15 patients with CHS in childhood have been revealed in a decade by a nationwide survey in Japan. Thus, LYST mutations might indicate a HSP phenotype in a considerable number of adult patients with CHS.
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Acknowledgements
The following programs provided financial support to this research, including the study design, collection, analysis, and interpretation of data, and writing of the manuscript: Grants-in-Aid from the Research Committee for Ataxic Disease (YT), the Ministry of Health, Labor and Welfare, Japan, and JSPS KAKENHI Grant Numbers 17 K17772 (KK), 19 K16910 (KK), JP18K07495 (YT), and 21K07456 (YT) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.
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KK and YT designed and organized the study. HS, TN, HH, KS, and Makio T obtained the clinical findings and genome DNA samples of the patients through JASPAC. KK, Mai T, and HI analysed LYST mutations. KK wrote the manuscript, which was edited by HI, ST, and YT.
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Koh, K., Tsuchiya, M., Ishiura, H. et al. Chédiak–Higashi syndrome presenting as a hereditary spastic paraplegia. J Hum Genet 67, 119–121 (2022). https://doi.org/10.1038/s10038-021-00977-z
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DOI: https://doi.org/10.1038/s10038-021-00977-z