IRAK1 and colitis: It also suppressed colon shortening, 2,4,6-trinitrobenzenesulfonic acid (TNBS)-induced IRAK1 phosphorylation, NF-κB activation, colonic myeloperoxidase activity, TNBS-induced cyclooxygenase-2 (COX-2) upregulation, and induction of nitric oxide synthase in a murine TNBS-induced colitis model.