Abstract
Dendritic cells (DC) have important functions in T cell immunity and T cell tolerance. Previous studies suggest that immature dendritic cells (imDCs) might be involved in the induction of peripheral T cell tolerance. While interleukin-10 (IL-10) functions at different levels of the immune response, transforming growth factor-beta 1 (TGF-beta 1) is considered to be a key factor in immune tolerance. In this study, we investigated the effects of immature DC (imDC) co-transfected with IL-10 and TGF-beta 1 genes (IL-10-TGF-beta 1-imDC) on inducing immune tolerance. Moreover, we compared the effects of IL-10-TGF-beta 1-imDC with IL-10 transfected imDC (IL-10-imDC) and TGF-beta 1-transfected imDC (TGF-beta 1-imDC), respectively. IL-10-TGF-beta 1-imDC resulted in the down-regulation of MHC class II, CD80 and CD86. IL-10-TGF-beta 1-imDC could induce T cell hyporesponsiveness, and was reluctant to proliferate. IL-10-TGF-beta 1-imDC was more effective than IL-10-imDC and TGF-beta 1-imDC, respectively. In summary, co-expression of IL-10 and TGF-beta 1 affected the immunity of imDCs and enhanced their tolerogenicity. It might be a promising therapy for donor-specific tolerance after organ transplantation.
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Acknowledgments
The authors thank Mrs. Lingyun Gao for her excellent technical assistance. This study was supported by Fujian Provincial Natural Foundation (No. 2009D066) and Fujian Medical University Foundation (No. 09ZD007).
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Lihong Chen, Minglian Qiu, and Wubing He are contributed equally to this study.
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Chen, L., Qiu, M., He, W. et al. Functional study of immature dendritic cells co-transfected with IL-10 and TGF-beta 1 genes in vitro. Mol Biol Rep 39, 6633–6639 (2012). https://doi.org/10.1007/s11033-012-1468-4
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DOI: https://doi.org/10.1007/s11033-012-1468-4