The genetic architecture of dementia risk: how Alzheimer's disease vulnerability converges on lipid metabolism and immune cell networks
Husen, E.; Cai, Z.; Gerrits, E.; Sjöstedt, E.; Mitsios, N.; Zheng, T.; Skarwan, E.; Uhlen, M.; Sivertsson, A.; Mulder, J.
Show abstract
Although genome-wide association studies (GWAS) have identified numerous dementia risk loci, their cell-type and tissue-specific contexts remain largely unresolved. We introduced HPA GeneSet Explorer, a statistical pipeline designed to systemically map Genome wide association study (GWAS) disease risk genes across the Human Protein Atlas (HPA). This approach generates a multiscale transcriptomic map of genetic risk, spanning systemic organs, brain regions, and cell types. Applying this framework to Alzheimers disease (AD), Lewy body dementia (DLB), and Frontotemporal dementia (FTD) revealed convergent neuronal enrichment in all three diseases. In addition, we identified AD-specific enrichment in immune system and liver associated gene modules, along with DLB-specific enrichment in ciliary modules. By mapping these vulnerabilities in non-demented samples, we provide a blueprint of the baseline vulnerability hotspots that can precede clinical neurodegeneration, offering new targets for disease-specific therapies and biomarker discovery.
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