IL17A and pemphigus foliaceus: Moreover, IL-17A expression in BLM-induced PF model enhanced the expression of other known pro-inflammatory cytokines/chemokines such as TNF-α, IL-1, IL-6 and TGF-β, IL-8, CCL2, CXCL1 and CXCL5 by epithelial and endothelial cells (128, 141).