Genetic risk loci for Parkinson's disease and dementia in a large-scale population-based Taiwanese cohort (TPMI).
Journal
The Lancet regional health. Western Pacific
Journal Volume
68
Start Page
Article number 101825
ISSN
2666-6065
Date Issued
2026-03
Author(s)
Lin, Chin-Hsien
Chang, Chien-Ching
Chen, Hung-Hsin
Lin, Wan-Jia
Lin, Rung-Juen
Hsu, Chia-Lang
Guo, Yi-Jen
Fang, Ting-Chun
Lin, Shinn-Zong
Huang, Chih-Yang
Wang, Shuu-Jiun
Hang, Jen-Fan
Hsieh, Sun-Wung
Chou, Mei-Chuan
Yeh, Tu-Hsueh
Hu, Chaur-Jong
Yang, Fu-Chi
Chang, Hsin-An
Lee, Tsong-Hai
Tsai, Meng-Han
Liou, Jyh-Ming
Wu, Ming-Shiang
Park, Kye Won
Chung, Sun Ju
Tan, Eng-King
Shen-Jang Fann, Cathy
Abstract
The genetic architecture of Parkinson's disease (PD) and progression to PD dementia (PDD) remains incompletely characterized in Asians. Here, we investigated genetic risk factors for PD and PDD in Taiwanese individuals from the Taiwan Precision Medicine Initiative (TPMI), the largest non-European cohort integrating genetic and electronic medical record data.
We conducted a two-stage population-based case-control genome-wide association study (GWAS) with a 1:10 case-to-control ratio. Results were meta-analyzed with an independent Asian GWAS. We further constructed a polygenic risk score (PRS) to distinguish PD cases from controls. PDD risk was assessed using logistic regression and Cox models, with replication in an independent cohort that underwent whole-genome sequencing (WGS).
Among 463,447 TPMI participants, 4381 PD patients and 43,810 controls were analysed. We confirmed established PD loci at and , and identified additional risk variants near , , , , , and . PRS models discriminated PD from controls with 70% accuracy. Among PD patients, 333 developed PDD. Genome-wide survival analysis identified rs141772267 as a novel PDD risk variant (HR = 4.20; 95% CI 2.67-6.60; = 5.41 × 10), together with two loci near L- and -. Carriers of two or more minor risk alleles showed a markedly increased risk of progression to PDD ( = 2 × 10), which was replicated in an independent WGS cohort.
Our findings highlight both shared and ethnicity-specific PD risk loci and identify as a potential novel contributor to PDD. Further multi-ethnic and functional studies are warranted.
Academia Sinica and National Development Fund.
Subjects
Dementia
Genome-wide association study
Parkinson's disease
Type
journal article