Objective We sought to determine the role of IL-17A in psoriasis pathogenesis and to identify
a robust and measurable biomarker of IL-17A–driven pathology. Methods We studied 8
healthy subjects and 8 patients with psoriasis before and after administration of
secukinumab, a fully human anti–IL-17A mAb, and used a combination of classical
techniques and a novel skin microperfusion assay to evaluate the expression of 170 …