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Identification of Genetic Variants in Progressive Supranuclear Palsy in Southeast Asia
Adeline Su Lyn Ng1,2,3, Ai Huey Tan4,5, Yi Jayne Tan1
1Department of Neurology, National Neuroscience Institute, Singapore, Singapore.
Genetic analysis of Southeast Asian progressive supranuclear palsy (PSP) patients revealed novel variants, with MAPT, GBA1, and OPTN being common. Findings suggest distinct genetic factors and overlap with other neurodegenerative diseases.
Area of Science:
- Neurogenetics
- Neurodegenerative Diseases
- Population Genetics
Background:
- Progressive supranuclear palsy (PSP) is primarily sporadic, with limited familial cases.
- MAPT is the main genetic risk locus in Caucasian PSP populations.
- Genetic factors in Asian PSP populations are understudied.
Purpose of the Study:
- Investigate genetic factors in Southeast Asian PSP patients.
- Identify novel genetic variants associated with PSP in this cohort.
Main Methods:
- Employed next-generation sequencing (whole-exome, whole-genome, targeted).
- Analyzed two Asian cohorts comprising 177 PSP patients.
Main Results:
- Identified 17 pathogenic/likely pathogenic variants in 16 patients (9%), including eight novel variants.
- Common variants were found in MAPT, GBA1, OPTN, SYNJ1, and SQSTM1.
- Detected variants in TBK1, PRNP, and ABCA7, implicated in other neurodegenerative diseases.
Conclusions:
- Genetic findings in Asian PSP cohorts differ from Western populations.
- Suggests shared genetic architecture between PSP and other neurodegenerative diseases.
- Recommends further functional studies and validation in independent Asian cohorts.
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