Components of the alternative complement pathway in patients with psoriasis

Psoriasis is a chronic inflammatory skin disease. Adipose tissue plays important roles in the events that regulate body metabolism. This study determined the levels of complement 3 ( C3), acylation-stimulating protein (ASP), and adipsin, which take part in the alternate complement pathway, and are synthesized in and secreted by adipose tissue.Thirty-two patients with psoriasis were matched with 22 controls in terms of age, sex, body mass index, and lipid profiles. Serum C3, ASP, and adipsin levels were measured in both groups.The serum C3 level was higher and ASP and adipsin levels were lower in the patient group, but these differences were not significant (p = 0.708, p = 0.628, and p = 0.218, respectively). ASP and adipsin levels were correlated positively in patients with psoriasis (p = 0.029).To our knowledge, this study is the first to evaluate ASP and adipsin levels in patients with psoriasis. The roles of ASP and adipsin in the etiopathogenesis of psoriasis are unclear. Although not statistically significant, the lower ASP and adipsin levels in the patient group suggest a potential anti-inflammatory role of these proteins in psoriasis. Further studies should examine the relationships between ASP/adipsin and psoriasis.