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- W2894556446 abstract "Objective To identify modifiers of age at diagnosis of Parkinson disease (PD). Methods Genome-wide association study (GWAS) included 1,950 individuals with PD from the NeuroGenetics Research Consortium (NGRC) study. Replication was conducted in the Parkinson's, Genes and Environment study, including 209 prevalent (PAGE P ) and 517 incident (PAGE I ) PD cases. Cox regression was used to test association with age at diagnosis. Individuals without neurologic disease were used to rule out confounding. Gene-level analysis and functional annotation were conducted using Functional Mapping and Annotation of GWAS platform (FUMA). Results The GWAS revealed 2 linked but seemingly independent association signals that mapped to LPPR1 on chromosome 9. LPPR1 was significant in gene-based analysis ( p = 1E-8). The top signal (rs17763929, hazard ratio [HR] = 1.88, p = 5E-8) replicated in PAGE P (HR = 1.87, p = 0.01) but not in PAGE I . The second signal (rs73656147) was robust with no evidence of heterogeneity (HR = 1.95, p = 3E-6 in NGRC; HR = 2.14, p = 1E-3 in PAGE P + PAGE I , and HR = 2.00, p = 9E-9 in meta-analysis of NGRC + PAGE P + PAGE I ). The associations were with age at diagnosis, not confounded by age in patients or in the general population. The PD-associated regions included variants with Combined Annotation Dependent Depletion (CADD) scores = 10–19 (top 1%–10% most deleterious mutations in the genome), a missense with predicted destabilizing effect on LPPR1, an expression quantitative trait locus (eQTL) for GRIN3A (false discovery rate [FDR] = 4E-4), and variants that overlap with enhancers in LPPR1 and interact with promoters of LPPR1 and 9 other brain-expressed genes (Hi-C FDR < 1E-6). Conclusions Through association with age at diagnosis, we uncovered LPPR1 as a modifier gene for PD. LPPR1 expression promotes neuronal regeneration after injury in animal models. Present data provide a strong foundation for mechanistic studies to test LPPR1 as a driver of response to damage and a therapeutic target for enhancing neuroregeneration and slowing disease progression." @default.
- W2894556446 created "2018-10-12" @default.
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- W2894556446 date "2018-10-01" @default.
- W2894556446 modified "2023-09-26" @default.
- W2894556446 title "Plasticity-related gene 3 (<i>LPPR1</i>) and age at diagnosis of Parkinson disease" @default.
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- W2894556446 doi "https://doi.org/10.1212/nxg.0000000000000271" @default.
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