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Recently, a number of cytokines belonging to the interleukin (IL)-17 family have been identified. These are termed as IL-17B, IL-17C (1) and IL-17E (2). IL-17 is a potent proinflammatory cytokine that plays roles in a number of diseases including rheumatoid arthritis (3), multiple sclerosis (4), and promotion of tumor growth (5). IL-17B, C, and E like IL-17 are able to induce proinflammatory responses. However, they do not bind to the IL-17 receptor suggesting that additional IL-17R related receptor might exist. Receptor for IL-17B and IL-17E has been independently isolated by Shi, et al (6) and Lee, et al. (2) and has been designated as EV127 (in mouse) and IL-17Rh1 (in human), respectively. IL-17E induces activation of NF-kB pathway and like IL-17 also induces production of IL-8.