Analysis of association between cytokine gene polymorphisms and psoriatic disease in Russians of East Siberia

Psoriasis (PS) and psoriatic arthritis (PsA) are subtypes of psoriatic disease (PD), a chronic inflammatory disorder with predominantly cutaneous manifestations. PsA is developed in approximately one third of patients with PS. These two phenotypes are immune-mediated diseases with different heredity that might in part be explained by different genetic factors. We carried out an analysis of association between haplotypes of cytokine genes (TNFA, IL4 and IL10) and PD in Russians from East Siberian region of Russia. The haplotypes were not found to be associated with either PS or PsA. However, meta-analyses with published data suggested associations between PS and IL4 rs2243250 and TNFA rs1800629 polymorphisms, while PsA was found to be associated with 1L4 rs2243250 only. The results provide further insight into understanding of genetic factors predisposing to PD.