Journal
CLINICAL AND EXPERIMENTAL DERMATOLOGY
Volume 36, Issue 8, Pages 845-850Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2230.2011.04131.x
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Background. Psoriasis is a chronic, systemic, inflammatory disease. Inflammatory markers are used in clinical practice to detect acute inflammation, and as markers of treatment response. Etanercept blocks tumour necrosis factor (TNF)-alpha, which plays a central role in the psoriatic inflammation process. Aim. To reveal any possible association between disease severity [measured by Psoriasis Area and Severity Index (PASI)] and the inflammatory burden (measured by a group of inflammatory markers), before and after etanercept treatment. Methods. In total, 41 patients with psoriasis vulgaris, eligible for biological treatment with etanercept, were enrolled in the study. A set of inflammatory markers was measured, including levels of white blood cells and neutrophils, fibrinogen, ferritin, high-sensitivity C-reactive protein (hs-CRP), erythrocyte sedimentation rate (ESR), haptoglobin, ceruloplasmin and alpha 1-antitrypsin, before and after 12 weeks of etanercept 50 mg twice weekly. Results. All markers were reduced after treatment (P < 0.001). PASI correlated with fibrinogen and hs-CRP. Of the 41 patients, 19 (46.3%) achieved reduction of 75% in PASI (PASI75). An increase in hs-CRP and ESR difference (values before minus values after treatment) was related to higher likelihood of achieving PASI75. Conclusions. Inflammatory markers, particularly hs-CRP and to a lesser extent, fibrinogen and ESR, can be used to assist in assessing disease severity and response to treatment in patients with psoriasis. A combination of selected inflammatory factors (which we term the Index of Psoriasis Inflammation) in combination with PASI might reflect inflammatory status in psoriasis more accurately than each one separately.
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