IL6 and inflammatory bowel disease: Studies have implicated that T helper (Th) 1-related cytokines, such as interferon- (IFN-) γ and tumor necrosis factor (TNF-) α, Th17 associated cytokines, such as interleukin- (IL-) 17A, IL-6, and IL-23, and Th2 related cytokines such as IL-4, IL-5, and IL-13 are involved in the induction and development of IBD [10].