IL6 and psoriasis: With the assumption that skin inflammation via proinflammatory cytokines is associated with the pathogenesis and clinical manifestation of psoriasis, the inhibitory effect of naringin/sericin drugs on the production of proinflammatory cytokines (TNF-α, IL-6, IL-23, and IL-12p40) and the expression of mRNA of the human peripheral blood mononuclear cells from psoriasis patients were investigated.