Rabbit Anti-Swine CXCL8 monoclonal antibody for WB. Interleukin 8 is a pro-inflammatory factor which belongs to the CXC subfamily of chemokinesk, and which are bound by the cell surface receptors IL-8RA and IL-8RB. IL-8 functions as a chemoattractant and is a potent angiogenic factor. The expression and secretion of IL-8 can be induced by diverse inflammatory stimuli in many cells, including macrophages and endothelial cells. In endothelial cells, IL-8 is present in storage vesicles called Weibel-Palade bodies.