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The aim of this study was to assess whether interleukin-10 (IL-10) and/or transforming growth factor β-1 (TGF β1) downregulate HLA-DR expression using the HT29 cell line as a model of colonic epithelial cells. HLA-DR expression was induced in HT29 cells withγ-interferon. The effects of IL-10 alone, TGF β1alone, and IL-10 and TGF β1in combination were studied. HLA-DR expression was assessed using flow cytometric analysis.γ-Interferon induced HLA-DR expression in a dose-dependent fashion. In the absence ofγ-interferon, neither IL-10 nor TGF β1induced HLA-DR expression. In isolation, neither IL10 nor TGF β1downregulated HLA-DR expression. When IL-10 and TGF β1were added in combination, small (6-30%) statistically significant reductions in HLA-DR expression were seen. The biological significance is unclear.

Original publication




Conference paper


Hindawi Limited

Publication Date





7 - 11