rs10820780 (RN7SKP191): Dementia Genetics Variant

Key takeaways

• This variant appears in a GWAS of more than 800,000 individuals studying all-cause and vascular dementia.
• The source study identified new genetic regions linked to brain vascular damage, neurodegeneration, and dementia risk.
• Known Alzheimer's disease genetic variants were replicated as risk factors for all-cause and vascular dementia in this study.
• Variant-specific effect sizes for rs10820780 are not available in the provided study excerpt.

What the research says A genome-wide association meta-analysis (GWAS, a large-scale study scanning the full genome for variants linked to a condition) of all-cause dementia (ACD) and vascular dementia (VaD, dementia caused by reduced blood flow to the brain) used data from 21 cohorts covering 800,597 individuals, including 46,902 ACD cases and 8,702 VaD cases. Novel genetic loci (specific genome regions) associated with ACD were linked to energy transport (SEMA4D), neuronal excitability (ANO3), amyloid deposition in the brain (RBFOX1), and imaging markers of small vessel disease (HBEGF); novel VaD loci were associated with hypertension, diabetes, and neuron maintenance (SPRY2, FOXA2, AJAP1, PSMA3). The study found genetic overlap between ACD and neurodegenerative processes, vascular risk factors, and cerebral small vessel disease (SVD, damage to the small blood vessels of the brain).

Reported associations

• All-cause dementia (ACD): This variant is studied in the context of a GWAS covering 46,902 ACD cases across 800,597 individuals; variant-specific effect sizes for rs10820780 are not detailed in the available study excerpt.
• Vascular dementia (VaD): The same GWAS examined VaD using 8,702 cases, finding novel loci associated with hypertension, diabetes, and neuron maintenance; variant-specific data for rs10820780 are not provided in the available excerpt.

Evidence quality The associated GWAS meta-analysis is one of the largest of its kind for ACD and VaD, covering 800,597 individuals from 21 cohorts, providing substantial statistical power. Known Alzheimer's disease loci were replicated for both ACD and VaD, supporting the study methodology. The authors note that results require validation in additional datasets and that studies in non-European populations are needed, indicating these findings should be treated as preliminary in the absence of replication. The available study excerpt does not include variant-specific p-values, odds ratios, or effect sizes for rs10820780, so the strength of this particular association cannot be assessed from the provided text.

Lifestyle considerations No lifestyle considerations on file for this variant.