Psoriasis and 5HT-R2C Gene Polymorphism: Association between Clinical, Demographic and Therapeutic Parameters in the Turkish Population

We aimed to investigate the relationship between single nucleotide polymorphism (SNP) in the promoter region of the 5-HT-R2C gene and stress-related disease psoriasis in the Turkish population. The putative association between the 5-HTR2C variant (rs6318 Cys23Ser allele) and patients with psoriasis was investigated. 100 patients with psoriasis and 100 age-sex matched, unrelated healthy subjects representing the control group were included in the study. The PCR-RFLP method was used for genotyping the 5-HTR2C variation. There was no statistically difference in terms of genotype distributions and allele frequencies between the control subjects and patients with psoriasis (P=0.360 and P=0.439, respectively). The comparison between the presence and absence of the 5-HTR2C gene rs6318 G allele within the determined clinical subsets resulted in a significant difference with regard to treatment methodology only when conventional therapy and one or more medical therapy was compared (P=0.021). This study is the first clinical study to investigate the association between 5-HTR2C polymorphism and psoriasis. The role of the 5-HTR2C gene should be examined with more parameters in a larger case series.