Interleukin-17A (UniProt: Q62386; also known as IL-17, IL-17A, Cytotoxic T-lymphocyte-associated antigen 8, CTLA-8) is encoded by the Il17A (also known as Ctla8, Il17) gene (Gene ID: 16171) in murine species. IL-17A is a homodimeric, pro-inflammatory cytokine that is synthesized with a signal peptide (aa 1-25) that is subsequently cleaved off to produce the mature protein. It is expressed by Th17 cell lineage, and its expression is observed in innate lymphoid cells, T cell subsets, and invariant natural killer (iNKT) cells. It is induced upon differentiation of CD4+ T cells toward Th17 effector cells upon antigen receptor binding in the presence of IL6 and TGF-β1. Its levels are also up-regulated by pro-inflammatory cytokines in response to microbes in various immune cells. IL-17A actions are mediated via interaction with IL-17RA and IL-17RC heterodimeric receptor complex, triggering homotypic interaction of these receptors with TRAF3 Interacting Protein 2 (TRAF3IP2) adapter. This leads to downstream TRAF6-mediated activation of NF-kB and MAP kinase pathways resulting in transcriptional activation of cytokines, chemokines, antimicrobial peptides, and matrix metalloproteinases. IL-17A plays an important role in connecting T cell-mediated adaptive immunity and acute inflammatory response to destroy extracellular bacteria and fungi. It plays important roles in multiple biological processes, including the induction of IL-6, IL-8, G-CSF, and PGE2 production in epithelial, endothelial or fibroblasts; the enhancement of surface expression of ICAM-1 in fibroblasts; activation of NF- kB and co-stimulation of T cell proliferation. (Ref.: Lemaire, MM., et al. (2011). J. Immunol. 187(7); 3530 3537; Re, SL., et al. (2010). J. Immunol. 184(11); 6367-6377; Liang, SC., et al. (2007). J. Immunol. 179(11); 7791-7799; Park, H., et al. (2005). Nat. Immunol. 6(11); 1133-1141).，官网链接：https://www.sigmaaldrich.cn/product/mm/mabf2009 默克 科研、开发、生产。 作为生命科学行业的全球领先供应商，我们致力于为科研、生物技术开发和生产，以及制药药物疗法开发和生产提供各类解决方案和服务。

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