Pathogenic Characteristics of Th17 Cells Based on the IL-17 Signaling Pathway in the Regulation of Sebaceous Gland Lipoprotein Metabolism in an Acne Rat Model.

Acne is a common and chronic inflammatory dermatosis of sebaceous gland units of the human hair follicle. Acne is closely related to immune cytokines and cells including T helper 17cells (Th17 cells). Mis-regulated glycolipid metabolism also plays a vital role in the process.This investigation aimed to explore the role of IL-17 in signaling pathways controlling sebaceous gland lipoprotein metabolism in a rat model of acne.We generated the rat ear acne model, and investigated the pathological changes of acne skin tissue by histological analysis and the changes in the critical factors including DEFB1, GPR65, FADS1, and FADS2 by Western Blot in this model.There were more Th17 cells in the rat ear acne model than in the control mice. The expression levels of DEFB1, GPR65, FADS1, FADS2 and MOGAT1 were significantly upregulated in serum and tissue from rat acne model, which could be concluded that the Th17 cells play a major role in the pathogenesis of acne based.Although acne is associated with immune effects and glycolipid metabolism, inhibition of IL-17 signaling pathway might be a novel way for acne therapy. Our findings also suggest a new strategy for targeted therapy of acne.