IL-17B

Interleukin-17B (IL-17B) belongs to the IL-17 cytokine family and is a proinflammatory cytokine. IL-17B is expressed in adult pancreas, small intestine, stomach, spinal cord and testis. And IL-17B is less pronounced expression in prostate, colon mucosal lining, and ovary. IL-17B was never detected in activated CD4 T cells[1][2]. IL-17B is secreted as a non-covalent dimer glycoprotein[2]. IL-17B shares about 27% amino acid identity with IL-17A and stimulates the release of tumour necrosis factor alpha (TNFα) and IL-1β in the THP-1 monocytic cell line[1]. The receptor of IL-17B is IL-17RB, which belongs to the IL-17 receptor family. IL-17B shares IL-17RB with IL-17E. IL-17B inhibits IL-17E binding to IL-17RA/IL-17RB complexes, exhibits protumor roles and IL-17E antitumor activities[2]. IL-17B plays an important role in cancer progression, angiogenesis, and inflammatory arthritis[1]. Human and mouse IL-17B shares 88.33% sequence identity.