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Inflammatory bowel disease (IBD) is caused by an uncontrolled immune response in the intestinal lumen, leading to inflammation in genetically predisposed individuals. Immunotherapy may be a promising approach to the treatment of IBD. Here, we show that transforming growth factor-beta1 (TGF-beta1) gene-modified immature dendritic cells (imDCs) could enhance the inhibitory function of imDCs and delay the progress of IBD induced by dextran sodium sulfate in mice. The results of fluorescence-activated cell sorter (FACS) demonstrated that this protective effect is mediated partially by inducing CD4(+)Foxp3(+) regulatory T cells (Tregs) in mesentery lymph nodes to control inflammation. In vitro experiments also supported this hypothesis. In conclusion, we provide evidence that TGF-beta1-modified bone marrow-derived imDCs may have a therapeutic effect to IBD.

TGF-β1 gene-modified, immature dendritic cells delay the development of inflammatory bowel disease by inducing CD4+Foxp3+ regulatory T cells