IL-36β

IL-36 beta (IL-1F8), a subform of IL-36 family, belongs to IL-1 superfamily. Human IL-36 beta shares <40% aa sequence identity with mouse. L-36 beta mediates inflammatory response. L-36 beta binds to IL-36R and recruits the co-receptor IL-1RAcP. So that heterodimeric signaling complex brings Toll/IL-1R (TIR) domains of the 2 receptor chains in close proximity, and thereby activating NF-κB and MAPK signaling pathways[1]. But the activation requires N-terminal cleavage at Arg5 by neutrophil granule-derived proteases, such as cathepsin G, elastase and proteinase-3[2]. IL-36 beta is expressed in monocytes, T/B-lymphocytes, bone-marrow, tonsils, heart, lung, testis, colon, neuron cells, glial cells[3].