rs12000047 (CYLC2): Stress, Genes, and Depression

Key takeaways

• rs12000047 near the CYLC2 gene was found through a gene-environment interaction study, not a standard genome-wide genetic scan.
• The variant only reached genome-wide significance (p < 2.00 x 10^-8) when the combined effect of the SNP and its interaction with stressful life events was measured together.
• The environmental factor in the analysis is "dependent" stressful life events, meaning situations where a person's own behavior or personality may partly influence their exposure to stress.
• The study authors note that interactions with dependent stressful life events may reflect genetic influences on personality or behavior rather than a direct modification of stress sensitivity.
• Evidence comes from a single UK cohort (Generation Scotland) and has not been independently replicated, making findings preliminary.

What the research says A genome-wide by environment interaction study (GWEIS, a method that tests whether genetic effects on a trait change depending on an environmental exposure) of depressive symptoms in UK population cohorts identified this locus, upstream of the CYLC2 gene (the LINC00587 - CYLC2 region), as reaching genome-wide significance (p < 2.00 x 10^-8) for the joint effect of the variant's direct genetic influence and its interaction with dependent stressful life events in the Generation Scotland cohort; a nearby variant, rs12005200, was also flagged at the same location. Polygenic scores (a method of combining many small genetic signals across the genome into a single composite score) improved prediction of depressive symptom levels when they incorporated gene-by-environment interaction weights alongside direct genetic weights, with improvements reaching p = 0.01 using UK Biobank depressive symptom weights and p = 5.91 x 10^-3 using PGC major depressive disorder weights. The authors note that interactions involving dependent stressful life events may reflect genetic mediation through personality or behavioral traits rather than a direct modification of stress sensitivity.

Reported associations

• Depressive symptoms (joint effect of direct genetic influence and gene-by-environment interaction with dependent stressful life events): Reached genome-wide significance at p < 2.00 x 10^-8 in Generation Scotland using a joint-effect model that sums the variant's direct main effect and its interaction term; the locus was not individually significant in the standard genome-wide association scan of depressive symptoms.

Evidence quality The association at this locus originates from a single GWEIS conducted in Generation Scotland, a UK population-based cohort. The result reached genome-wide significance (p < 2.00 x 10^-8) only under a joint-effect model combining the variant's direct main genetic effect with its statistical interaction with dependent stressful life events; the locus did not reach significance in the standard genome-wide association analysis alone, and no individual SNP reached genome-wide significance in the standard GWAS of depressive symptoms in either Generation Scotland or UK Biobank in this study. No independent replication of this specific locus is reported in the available data. The study authors explicitly state that further GWEIS studies are required, and findings at this locus should be considered preliminary.

Lifestyle considerations No lifestyle considerations on file for this variant.