TNIP1/ANXA6 and CSMD1 variants interacting with cigarette smoking, alcohol intake affect risk of psoriasis

BackgroundPsoriasis is a common multi-factorial skin disease, in which gene–gene and gene–environment interactions may affect the onset, manifestation and clinical course.ObjectiveTo investigate the underlying gene-environment interaction among several established susceptibility genes, cigarette smoking and alcohol intake.MethodsUsing a two-stage case–control design, we searched for pairwise interactions between cigarette smoking and alcohol intake respectively with 9 single nucleotide polymorphisms (SNPs) at ERAP1, PTTG1, CSMD1, GJB2, SERPINB8, ZNF816A and TNIP1/ANXA6 that have been associated with risk for psoriasis in 7,223 subjects. Multiple logistic regression analysis was used for data analysis.ResultsSignificant interactions were found for alcohol intake with rs3762999 (p = 0.0257) and rs999556 (p = 0.0071) at TNIP/ANXA6; and for cigarette smoking with rs7007032 (p = 0.0023) and rs10088247 (p = 0.0023) at CSMD1.ConclusionThis study provides empirical evidence for the gene–environment interactions between TNIP1/ANXA6 and alcohol use, CSMD1 and cigarette smoking, highlighting the importance of gene–environment interactions in the pathogenesis of psoriasis.