Article Type

Original Study


Background Psoriasis is a common chronic, recurrent, and immune-mediated disease of the skin and joints that follows a relapsing and remitting course. Psoriasis represents a T-cell-mediated inflammatory skin disease that includes the activation of both Th1, which produces interferon-g (IFN-γ), tumor necrosis factor-α, and interleukin-2 (IL-2), and Th17, which produces IL-17, tumor necrosis factor-α, IL-6, and IL-22. Objective We planned this study to determine probable associations between IFN-γ, Th1 cytokine, in the sera of psoriatic patients and the possible correlation to disease severity. Materials and methods We studied the level of serum IFN-γ in 40 cases of plaque psoriasis, erythrodermic, and guttatepsoriasis using PASI score for assessing the severity, and in the serum of healthy 40 controls. Results There was a statistically significant positive correlation between the PASI score and the level of IFN-γ in all clinical types. This can suggest that serum IFN-g is a psoriasis severity and prognostic marker. Conclusion Serum IFN-γ in psoriatic patients can be used as a severity and prognostic marker, and then anti-IFN-γ may eventually become a useful therapeutic approach in psoriasis.