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Updated: Mar 29, 2026
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Mapping Alzheimer's Disease Variants to Their Target Genes Using Computational Analysis of Chromatin Configuration
Published on: January 9, 2020
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Locus- and Gene-Level Insights into the Inverse Association Between Alzheimer's Disease and Cancer
Dipti Debnath1,2, Mohammad Housini2, Sanjeev Sariya3
1Department of Microbiology, Immunology & Genetics, University of North Texas Health Science Center, 3500 Camp Bowie Blvd, Fort Worth, TX 76107, USA.
International Journal of Molecular Sciences
|March 28, 2026
Summary
This study investigates the inverse relationship between Alzheimer's disease (AD) and cancer. Genetic analysis reveals shared pathways, suggesting that mechanisms promoting cancer growth may protect against neurodegeneration in AD.
Area of Science:
- Genetics
- Oncology
- Neuroscience
Background:
- Epidemiological studies show an inverse association between Alzheimer's disease (AD) and cancer risk.
- The biological underpinnings of this observed inverse relationship remain largely unknown.
- Understanding shared genetic factors could elucidate disease mechanisms.
Purpose of the Study:
- To identify molecular factors contributing to the inverse epidemiological patterns between AD and cancer.
- To integrate locus-level genetic correlation (rg) with genetically regulated gene expression.
- To clarify the shared genetic architecture influencing both AD and various cancers.
Main Methods:
- Utilized large-scale genome-wide association studies (GWAS) for AD and eight major cancers.
- Quantified local genetic correlations (rg) between AD and cancer loci.
- Performed transcriptome-wide association studies (TWAS) using diverse tissue expression data.
Main Results:
- Identified eight genomic regions with significant negative local rg between AD and cancers.
- The 19q13.31-19q13.32 locus showed strong negative correlations across multiple cancers.
- Discovered 24 genes with opposing genetic effects on AD and at least three cancer types.
Conclusions:
- Genetic regulatory variations, particularly near the 19q13.31-19q13.32 locus, contribute to opposing AD and cancer risks.
- Genes inversely associated with AD are enriched in cell cycle, apoptosis, DNA repair, and metabolic pathways.
- Biological mechanisms promoting cancer proliferation may counteract neurodegenerative processes in AD.
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