Chemokine expression by HT-29 and Caco-2 cells in response to T helper type 1 (Th1) and Th2-derived cytokines. Chemokine expression was measured in cells from two cell lines after 24 h stimulation with Th1 cytomix of interleukin (IL)-1α (10 ng/ml), tumour necrosis factor (TNF)-α (50 ng/ml) and interferon (IFN)-γ (300 U/ml) or the Th2-derived cytokines IL-4 (10 ng/ml), IL-10 (10 ng/ml) and IL-13 (10 ng/ml). Each column represents mean ± standard error of the mean of six separate experiments. *Significance between all three groups, i.e. NCs with CD, CD with ulcerative colitis (UC) and NCs with UC. **In CCL24, there is a significance difference between NCs and UC as well as CD and UC, but not between CD and UC.