Background: S100A8 single nucleotide polymorphism (SNP) and S100A8 blood level are related to many inflammatory disorders with no available conclusion in psoriasis.
Aim: The aim of this study was to evaluate the possible role of S100A8 in psoriasis pathogenesis through analyzing its S100A8 (rs3806232) gene polymorphism and S100A8 serum level in psoriasis vulgaris patients, in addition to correlate the detected results with severity psoriasis in those patients.
Methods: This case-control study was conducted on 50 patients having psoriasis vulgaris, and 26 controls. Severity of psoriasis was evaluated using psoriasis area and severity index (PASI) score. S100A8 serum level and S100A8 (rs3806232) SNP were evaluated by ELISA and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) respectively.
Results: Serum S100A8 level was significantly higher in psoriatic patients than controls and was positively correlated with PASI score (r = 0.826, p < 0.001). S100A8 (rs3806232) AA genotype and A allele were significantly increased among psoriasis patients than controls (p < 0.001) increasing risk of psoriasis development by about 5, 12, and 6 times than AG, GG, and G alleles. AA genotype was significantly associated with psoriasis severity (p = 0.005) and high S100A8 serum levels (p = 0.018).
Conclusions: Circulating S100A8 could associated with disease severity and have an active role in psoriasis pathogenesis. S100A8 (rs3806232) SNP (AA genotype and A allele) might contribute to development and severity of psoriasis in the Egyptian population.
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