Interleukin 10 (IL-10), also known as human cytokine synthesis inhibitory factor (CSIF), is an anti-inflammatory cytokine. IL-10 was initially reported to suppress cytokine secretion, antigen presentation and CD4 T cell activation. Further investigation has shown that IL-10 predominantly inhibits lipopolysaccharide (LPS) mediated induction of the pro-inflammatory cytokines TNFα, IL-1β, IL-12, and IFNγ made by cells such as macrophages and Th1 T cells. Therefore, THP1 cells were cultured in 24 well plates at a concentration of 106 cells/ml and activated by LPS (1ug/mL) in the absence or presence of IL-10 (5ng/mL, 10ng/mL) for 24h and production of IL-1β was determined in the supernatants by cytokine specific ELISA.
Activation of THP1 cells with LPS (1ug/mL) resulted in high levels of production of IL-1β and strong inhibitory effects of IL-10 (5ng/mL, 10ng/mL) were observed on the production of IL-1β as shown in Table 1.