PMID- 23943615 OWN - NLM STAT- MEDLINE DCOM- 20131224 LR - 20211203 IS - 1083-351X (Electronic) IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 288 IP - 39 DP - 2013 Sep 27 TI - Fas signal promotes the immunosuppressive function of regulatory dendritic cells via the ERK/beta-catenin pathway. PG - 27825-35 LID - 10.1074/jbc.M112.425751 [doi] AB - Dendritic cells (DCs) play important roles in the initiation of immune response and also in the maintenance of immune tolerance. Now, many kinds of regulatory DCs with different phenotypes have been identified to suppress immune response and contribute to the control of autoimmune diseases. However, the mechanisms by which regulatory DCs can be regulated to exert the immunosuppressive function in the immune microenvironment remain to be fully investigated. In addition, how T cells, once activated, can feedback affect the function of regulatory DCs during immune response needs to be further identified. We previously identified a unique subset of CD11b(hi)Ia(low) regulatory DCs, differentiated from mature DCs or hematopoietic stem cells under a stromal microenvironment in spleen and liver, which can negatively regulate immune response in a feedback way. Here, we show that CD11b(hi)Ia(low) regulatory DCs expressed high level of Fas, and endothelial stromal cell-derived TGF-beta could induce high expression of Fas on regulatory DCs via ERK activation. Fas ligation could promote regulatory DCs to inhibit CD4(+) T cell proliferation more significantly. Furthermore, Fas ligation preferentially induced regulatory DCs to produce IL-10 and IP-10 via ERK-mediated inactivation of GSK-3 and subsequent up-regulation of beta-catenin. Interestingly, activated T cells could promote regulatory DCs to secrete more IL-10 and IP-10 partially through FasL. Therefore, our results demonstrate that Fas signal, at least from the activated T cells, can promote the immunosuppressive function of Fas-expressing regulatory DCs, providing a new manner for the regulatory DCs to regulate adaptive immunity. FAU - Qian, Cheng AU - Qian C AD - From the National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai 200433, China. FAU - Qian, Li AU - Qian L FAU - Yu, Yizhi AU - Yu Y FAU - An, Huazhang AU - An H FAU - Guo, Zhenhong AU - Guo Z FAU - Han, Yanmei AU - Han Y FAU - Chen, Yongjian AU - Chen Y FAU - Bai, Yi AU - Bai Y FAU - Wang, Qingqing AU - Wang Q FAU - Cao, Xuetao AU - Cao X LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130813 PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Chemokine CXCL10) RN - 0 (Fas protein, mouse) RN - 0 (beta Catenin) RN - 0 (fas Receptor) RN - 130068-27-8 (Interleukin-10) RN - EC 2.7.11.24 (Extracellular Signal-Regulated MAP Kinases) RN - EC 2.7.11.26 (Glycogen Synthase Kinase 3) SB - IM EIN - J Biol Chem. 2014 Feb 28;289(9):5534-5 MH - Active Transport, Cell Nucleus MH - Animals MH - Bone Marrow Cells/cytology MH - CD4-Positive T-Lymphocytes/cytology MH - Chemokine CXCL10/metabolism MH - Dendritic Cells/*cytology MH - Enzyme Activation MH - Extracellular Signal-Regulated MAP Kinases/*metabolism MH - Glycogen Synthase Kinase 3/metabolism MH - Homeostasis MH - Immune System MH - Immunosuppression Therapy MH - Interleukin-10/metabolism MH - Mice MH - Mice, Inbred C57BL MH - *Signal Transduction MH - beta Catenin/*metabolism MH - fas Receptor/*metabolism PMC - PMC3784698 OTO - NOTNLM OT - Catenin OT - Dendritic Cells OT - ERK OT - Fas OT - Tolerance EDAT- 2013/08/15 06:00 MHDA- 2013/12/25 06:00 PMCR- 2014/09/27 CRDT- 2013/08/15 06:00 PHST- 2013/08/15 06:00 [entrez] PHST- 2013/08/15 06:00 [pubmed] PHST- 2013/12/25 06:00 [medline] PHST- 2014/09/27 00:00 [pmc-release] AID - S0021-9258(20)48908-2 [pii] AID - M112.425751 [pii] AID - 10.1074/jbc.M112.425751 [doi] PST - ppublish SO - J Biol Chem. 2013 Sep 27;288(39):27825-35. doi: 10.1074/jbc.M112.425751. Epub 2013 Aug 13.