Interleukin 10 (IL-10), also known as human cytokine synthesis inhibitory factor (CSIF), is an anti-inflammatory cytokine. In humans, interleukin 10 is encoded by the IL10 gene. IL-10 signals through a receptor complex consisting of two IL-10 receptor-1 and two IL-10 receptor-2 proteins. Consequently, the functional receptor consists of four IL-10 receptor molecules. IL-10 binding induces STAT3 signalling via the phosphorylation of the cytoplasmic tails of IL-10 receptor 1 + IL-10 receptor 2 by JAK1 and Tyk2 respectively. IL-10 effects in immunoregulation and inflammation. It downregulates the expression of Th1 cytokines, MHC class II antigens, and co-stimulatory molecules on macrophages. It also enhances B cell survival, proliferation, and antibody production. IL-10 can block NF-κB activity, and is involved in the regulation of the JAK-STAT signaling pathway. IL-10 predominantly inhibits lipopolysaccharide (LPS) and bacterial product mediated induction of the pro-inflammatory cytokines TNFα, IL-1β, IL-12, and IFNγ secretion from Toll-Like Receptor (TLR) triggered myeloid lineage cells.
Background References
1. Mosser DM, Zhang X (December 2008). "Interleukin-10: new perspectives on an old cytokine". Immunological Reviews. 226 (1): 205–18.
2. Lazear HM, Nice TJ, Diamond MS (July 2015). "Interferon-λ: Immune Functions at Barrier Surfaces and Beyond". Immunity. 43 (1): 15–28.