text: RESULTS: << NF-kappaB >>/Rel activity induced by tumor necrosis factor alpha, [[ 12-O-tetradecanoylphorbol-13-acetate ]], or overexpression of NF-kappaB-inducing kinase, IKK-alpha, IKK-beta, or constitutively active IKK-alpha and IKK-beta mutants was inhibited dose dependently by sulfasalazine.