Abstract
Psoriasis is a skin disease with a complicated pathophysiology that includes an extensive inflammatory cytokine network. Nevertheless, the relationship between psoriasis severity, cytokine levels, and coronary artery atherosclerosis remains poorly understood. Our aim was to find serum markers as potential candidates for cardiovascular disease (CVD) risk monitoring in patients with psoriasis. Therefore, we examined coronary artery atherosclerosis via coronary computed tomography angiography (CCTA), serum cytokine levels via multiple immunoassays, and the patients' psoriasis state. Our findings reveal for the first time that the mainstream psoriasis cytokines interleukin 17A (IL-17A), IL-19, and IL-36 in the sera of Japanese patients with psoriasis showed a linear regression association with the Psoriasis Area and Severity Index score. Furthermore, the serum level of IL-19 was remarkably correlated to Th2-related serum cytokines such as IL-4 and IL-17E. When we investigated potential markers to monitor CVD in patients with psoriasis, circulating cluster of differentiation 31 (CD31) and resistin, but not psoriasis-related cytokines, were expressed differently at each stage of coronary atherosclerosis by CCTA. CD31 and resistin levels rose dramatically in individuals with psoriasis vulgaris (PV) and noncalcified atherosclerosis. In contrast, CD31 was negatively correlated with the coronary artery calcification score (CACS) in patients with PV, whereas resistin was inversely correlated with CACS in patients with psoriatic arthritis. In conclusion, the axis of IL-17A, IL-19, and IL-36 remains associated with the severity of psoriasis during the chronic phase of the disease, regardless of the application of topical or systemic treatment. Monitoring the levels of these cytokines can accurately determine the severity of skin inflammation. Resistin and CD31 are linked to coronary artery lesions and might be good candidates for tracking the progression of coronary atherosclerosis in patients with psoriasis.
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