IL-18 is a pleiotropic proinflammatory cytokine that is involved in induction of inflammatory mediators regulation of the cytotoxic activity of NK cells and T cells and differentiation and activation of both Th1 and Th2 cells IL-18 signals through its specific cell surface receptor IL-18R which comprises two subunits IL-18R and IL-18R beta IL-18 forms a signalling complex with the IL-18 receptor (R ) and (R ) chains at the plasma membrane which induces multiple inflammatory cytokines[2] IL-18R complex recruits the IL-1R- activating kinase and TNF- associated factor 6 which phosphorylates nuclear factor k - inducing kinase with subsequent activation of NF- k [3] IL-18R betaknockdown inhibits IL-18 driven tumor cell metastasis in C57/BL6 mice[4] IL-18RAP Protein Rhesus Macaque (HEK293 His) is a recombinant protein with a His label that consists of 357 amino acids (M1-R356) and is produced by HEK293 cells