Serum proteins and subsets of inflammatory markers were examined as proxy markers of psoriatic activity in 145 patients who had received 12 weeks of etanercept or ustekinumab for moderate-severe psoriasis. No consistent changes in normalized serum protein profiles were seen based on treatment response at weeks 4 or 12 across either group. However, IL-8, C-reactive protein (CRP) and CCL4 levels were significantly decreased in patients on etanercept. Serum CCL4 was minimally affected by ustekinumab and trends toward decreases in IL-8 and CRP were seen. Median numbers of circulating lymphocytes were unchanged across groups; no significant changes in CD4+ T-cells, CD8+ T-cells, regulatory T-cells, CLA+ cells, natural killer T-cells or cytokine production in ...