Combinations of gene variants linked to four cancer types
The case-control study compared 4,418 people with cancer and 11,811 controls, finding links that differed by cancer site and alcohol intake.
11,811 participants
Limit: Lifetime cancer outcomes were estimated from population rates rather than observed
Edited by Boris Djordjevic · AgingResearch.News
In a case-control study, researchers compared 4,418 people with head and neck, esophageal, gastric or colorectal cancer with 11,811 controls. They examined ALDH2 rs671, a gene variant that impairs the breakdown of aldehydes, reactive chemicals, alongside harmful inherited variants in DNA repair genes.
Carriers of harmful inherited variants in homologous recombination repair genes, which help repair DNA, had higher odds at all four cancer sites when they also had the GA/AA forms of ALDH2 rs671. The comparison group had the GG form and lacked those repair-gene variants. For mismatch repair, another DNA repair process, the combination was linked to esophageal and colorectal cancers. Estimated risks by age 80 in this subgroup were 35.4% and 87.7%, respectively, using Japanese population cancer rates. The ranges of likely values were wide: 7.7% to 90.3% and 46.9% to 99.9%, respectively.
Why it matters
Identifying inherited cancer susceptibility may help guide prevention as people age. The authors suggested that combining genetic information with alcohol exposure may improve risk assessment and prevention in East Asian populations.
Caveats
This case-control study found associations, not proof that the variants caused cancer. The age-80 risks were estimates based on Japanese population data, not observed lifetime outcomes.
The paper
Aichi Cancer Center
Cancer Epidemiology, Biomarkers & Prevention, Oct 27, 2026
