IL-10 Gene Modified Dendritic Cells Inhibit T Helper Type 1-Mediated Alloimmune Responses and Promote Immunological Tolerance in Diabetes  

作　　者：Huifen Zhu Wenhong Qiu Ping Lei Wei Zhou Xue Wen Fengrong He Li Li Hong Dai Guanxin Shen Feili Gong 

机构地区：[1]Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China [2]Medicine and Life Science College of Jianghan University, Wuhan 430056 China [3]These authors contributed equally to this work

出　　处：《Cellular & Molecular Immunology》2008年第1期41-46,共6页中国免疫学杂志（英文版）

基　　金：the National Natural Science Foundation（No.30671954）.

摘　　要：Dendritic cells （DCs） have the potency to regulate the outcome of autoimmunity through the modulation of immune responses. The induction of antigen specific tolerance is critical for prevention and treatment of allograft rejection. In the present Study, we transfected IL-10 gene into DCs and investigated their effect on inhibition of lymphocyte activity in vitro and induction of immune tolerance on islet allograft in mice. An IDDM C57BL/6 mouse model was induced by streptozotocin. The islet cells isolated from the BALB/c mice were transplanted into the kidney capules of the model mice followed by injection of IL-10 modified DCs （mDCs）. The results showed that mDCs could significantly inhibit T lymphocyte proliferation mediated by allotype cells and induce its apoptosis, whereas, unmodified DCs （umDCs） could promote the murine lymphocyte proliferation markedly. The injection of mDCs could prolong the survival of allotype islet transplanted IDDM mice. The average plasma glucose （PG） level in mDCs treated mice returned to normal within 3 days and lasted for about 2 weeks. The rejection response in control mice occurred for 5 days after transplantation. The level of IFN-γ was lower while IL-4 was higher in mDCs treated mice than that in umDCs treated mice, which indicated that Thl/Th2 deviation occurred. Our studies suggest that IL-10 gene modified DCs can induce the immune tolerance to islet graft and prolong survival of the recipients by the inhibiting of T cell proliferation in allotype mice. Cellular ＆ Molecular Immunology.Dendritic cells （DCs） have the potency to regulate the outcome of autoimmunity through the modulation of immune responses. The induction of antigen specific tolerance is critical for prevention and treatment of allograft rejection. In the present Study, we transfected IL-10 gene into DCs and investigated their effect on inhibition of lymphocyte activity in vitro and induction of immune tolerance on islet allograft in mice. An IDDM C57BL/6 mouse model was induced by streptozotocin. The islet cells isolated from the BALB/c mice were transplanted into the kidney capules of the model mice followed by injection of IL-10 modified DCs （mDCs）. The results showed that mDCs could significantly inhibit T lymphocyte proliferation mediated by allotype cells and induce its apoptosis, whereas, unmodified DCs （umDCs） could promote the murine lymphocyte proliferation markedly. The injection of mDCs could prolong the survival of allotype islet transplanted IDDM mice. The average plasma glucose （PG） level in mDCs treated mice returned to normal within 3 days and lasted for about 2 weeks. The rejection response in control mice occurred for 5 days after transplantation. The level of IFN-γ was lower while IL-4 was higher in mDCs treated mice than that in umDCs treated mice, which indicated that Thl/Th2 deviation occurred. Our studies suggest that IL-10 gene modified DCs can induce the immune tolerance to islet graft and prolong survival of the recipients by the inhibiting of T cell proliferation in allotype mice. Cellular ＆ Molecular Immunology.

关 键 词：IL-10 dendritic cell IDDM islet transplantation immune tolerance 

分 类 号：R392[医药卫生—免疫学]