- Loss-of-Function Variant in the SMPD1 Gene in Progressive Supranuclear Palsy-Richardson Syndrome Patients of Chinese Ancestry
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Shen-Yang Lim, Ai Huey Tan, Jia Nee Foo, Yi Jayne Tan, Elaine GY Chew, Azlina Ahmad Annuar, Alfand Marl Dy Closas, Azalea Pajo, Jia Lun Lim, Yi Wen Tay, Anis Nadhirah, Jia Wei Hor, Tzi Shin Toh, Lei Cheng Lit, Jannah Zulkefli, Su Juen Ngim, Weng Khong Lim, Huw R. Morris, Eng-King Tan, Adeline SL Ng
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J Mov Disord. 2024;17(2):213-217. Published online January 31, 2024
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DOI: https://doi.org/10.14802/jmd.24009
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 Abstract
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- Lysosomal dysfunction plays an important role in neurodegenerative diseases, including Parkinson’s disease (PD) and possibly Parkinson-plus syndromes such as progressive supranuclear palsy (PSP). This role is exemplified by the involvement of variants in the GBA1 gene, which results in a deficiency of the lysosomal enzyme glucocerebrosidase and is the most frequently identified genetic factor underlying PD worldwide. Pathogenic variants in the SMPD1 gene are a recessive cause of Niemann–Pick disease types A and B. Here, we provide the first report on an association between a loss-of-function variant in the SMPD1 gene present in a heterozygous state (p.Pro332Arg/p.P332R, which is known to result in reduced lysosomal acid sphingomyelinase activity), with PSP-Richardson syndrome in three unrelated patients of Chinese ancestry.
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Citations
Citations to this article as recorded by  - Parkinson’s Disease is Predominantly a Genetic Disease
Shen-Yang Lim, Christine Klein
Journal of Parkinson's Disease.2024; 14(3): 467. CrossRef - Identification of Genetic Variants in Progressive Supranuclear Palsy in Southeast Asia
Adeline Su Lyn Ng, Ai Huey Tan, Yi Jayne Tan, Jia Lun Lim, Michelle Mulan Lian, Alfand Marl Dy Closas, Azlina Ahmad‐Annuar, Shanthi Viswanathan, Yuen Kang Chia, Jia Nee Foo, Weng Khong Lim, Eng‐King Tan, Shen‐Yang Lim
Movement Disorders.2024; 39(10): 1829. CrossRef - Genetic-based diagnostics of Parkinson’s disease and other Parkinsonian syndromes
Emma N. Somerville, Ziv Gan-Or
Expert Review of Molecular Diagnostics.2024; : 1. CrossRef
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