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Updated: Feb 4, 2026

Genome-wide Analysis using ChIP to Identify Isoform-specific Gene Targets
Published on: July 7, 2010
Genome-wide association study identifies three PNPLA3/SAMM50 SNPs associated with HCC development in non-viral liver
Xia-Rong Liu1, Tsai-Hsuan Yang1, Tung-Hung Su2,3
1Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
Genetic variants in PNPLA3/SAMM50 are linked to hepatocellular carcinoma (HCC) risk in individuals without viral hepatitis. These findings offer potential biomarkers for HCC risk stratification and precision prevention strategies.
Area of Science:
- Genetics and Genomics
- Hepatology
- Cancer Epidemiology
Background:
- Limited genome-wide association studies (GWAS) exist for hepatocellular carcinoma (HCC) risk in individuals negative for hepatitis B and C viral markers.
- The long-term impact of genetic variants on HCC risk in non-viral hepatitis populations remains largely uncharacterized.
Purpose of the Study:
- To identify and validate genetic variants associated with long-term HCC risk in adults seronegative for HBsAg and anti-HCV.
- To evaluate the potential of identified variants as biomarkers for HCC risk stratification.
Main Methods:
- A multi-stage GWAS involving discovery, community-based, and hospital-based validation sets analyzed 308,693 single nucleotide polymorphisms (SNPs).
- A prospective cohort study followed 67,909 participants from 2012 to 2021 to assess long-term HCC risk associated with identified variants.
- Statistical analyses included linkage disequilibrium assessment and hazard ratio calculations for HCC risk based on genotype.
Main Results:
- Ten SNPs in the PNPLA3/SAMM50 locus showed significant association with HCC risk (p <1.62 × 10^-7), with three SNPs (rs738409, rs2281135, rs2235776) strongly replicated.
- These associated SNPs demonstrated significant HCC risk independent of steatosis.
- Individuals homozygous for risk genotypes exhibited elevated HCC risk, with adjusted hazard ratios ranging from 2.64 to 3.37; carriers of risk alleles also showed increased risk (adjusted HRs 1.61-1.88).
Conclusions:
- PNPLA3/SAMM50 variants are significantly associated with long-term HCC risk in individuals without viral hepatitis.
- These variants may serve as valuable biomarkers for identifying individuals at high risk for HCC, facilitating precision prevention.
- Further research into the underlying mechanisms of these genetic associations is warranted.
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