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Polymorphisms in the interleukin-20 gene: relationships to plaque-type psoriasis

Kingo, K., Kõks, S., Nikopensius, T., Silm, H. and Vasar, E. (2004) Polymorphisms in the interleukin-20 gene: relationships to plaque-type psoriasis. Genes & Immunity, 5 (2). pp. 117-121.

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We analyzed the frequency of single-nucleotide polymorphisms (SNPs) at positions −1053 (rs 2981572), 1380 (rs 2981573), 1462 (rs 2232360), and 3978 (rs 1518108) of the human interleukin-20 (IL-20) gene by tetraprimer ARMS-PCR method. A significant association between patients with psoriasis and the G allele at position −1053 (P<0.05) was established. The pairwise linkage disequilibrium (LD) matrix showed that the nearly complete LD was present within the polymorphisms at positions −1053, 1380, and 1462 of the IL-20 gene. We found that patients with plaque psoriasis had a higher frequency of the HT3 GAA haplotype (P<0.01, OR 2.341, 95% CI: 1.346–4.074) compared to the control group. Likewise, the HT3 GAA haplotype was associated with an increased risk of early-onset psoriasis (P<0.01, OR 2.305, 95% CI: 1.285–4.132), late onset of disease (P<0.01, OR 2.542, 95% CI: 1.266–5.102), familial psoriasis (P<0.02, OR 2.220, 95% CI: 1.249–3.945), and sporadic disease (P<0.01, OR 2.523, 95% CI: 1.390–4.580). Our data indicate that IL-20 gene polymorphisms should have a role in determining susceptibility to plaque-type psoriasis. The possible role of the studied SNPs in the regulation of the expression of IL-20 is unknown yet and needs further studies.

Item Type: Journal Article
Publisher: Springer Nature
Copyright: © 2019 Springer Nature Limited
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