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Genetic research

Breakthrough in Understanding Lewy Body Dementia

Strategic Insights

— 1 min read

Researchers from Shandong University in China have made a significant contribution to the field of neurodegenerative diseases by identifying novel genetic risk factors for Lewy body dementia (LBD). A genome-wide association study (GWAS) meta-analysis involving 4252 LBD cases and 189,290 controls was conducted to investigate the genetic basis of LBD. The study confirmed four previously known risk loci and highlighted a novel locus SYT16, which was found to be enriched in the phospholipid binding pathway. The researchers also identified 85 LBD risk genes that were enriched in eight functional clusters, including 51 statistically significant pathways.

Key Takeaways:

  • The study confirmed four previously known risk loci (APOE, GBA, BIN1, and SNCA-AS1) and identified a novel locus SYT16 as a risk factor for LBD.
  • The researchers found that 85 LBD risk genes were enriched in eight functional clusters, including 51 statistically significant pathways.
  • The study highlighted the potential clinical utility of these LBD risk genes, particularly APOE, GBA, BIN1, SNCA, SYT16, and INO80E.
  • Differential gene expression analysis showed significant dysregulation of these genes in LBD brain tissues and cells.
  • Gene prioritization identified 20 candidate causal genes, including five novel risk genes.
  • Tissue and cell-type specific enrichment analyses showed significant enrichment in brain tissues and cells.
  • Mendelian randomization analysis provided evidence for the causal effects of LBD on reduction in brain structures and cognitive performance.
  • Genetic correlation analysis showed that LBD was significantly positively associated with Alzheimer's disease and Parkinson's disease.

Statistics:

  • 4252 LBD cases were included in the GWAS meta-analysis.
  • 189,290 controls were included in the GWAS meta-analysis.
  • 85 LBD risk genes were identified in this study.
  • Five novel risk genes were identified in this study.
  • The study found that SYT16 was enriched in the phospholipid binding pathway.

Sources:

  • Genome-wide association study provides insights into the genetic basis of Lewy body dementia. Molecular Psychiatry, 2025.
  • Shandong University. Additional authors: Ping Zhu, Shiyang Wu, Shan Gao, Yijie He, Shuyuan Hu, Fengzhen Liu, Yan Chen, Mingxin Wang, Kun Wang, and Guiyou Liu.

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