PMID- 24420080 OWN - NLM STAT- MEDLINE DCOM- 20140623 LR - 20171116 IS - 1521-4141 (Electronic) IS - 0014-2980 (Linking) VI - 44 IP - 4 DP - 2014 Apr TI - A CD40/CD40L feedback loop drives the breakdown of CD8(+) T-cell tolerance following depletion of suppressive CD4(+) T cells. PG - 1099-107 LID - 10.1002/eji.201343738 [doi] AB - Dendritic cells (DCs) are the key APCs not only for the priming of naive T cells, but also for the induction and maintenance of peripheral T-cell tolerance. We have recently shown that cognate interactions between Foxp3(+) Tregs and steady-state DCs are crucial to maintain the tolerogenic potential of DCs. Using DIETER mice, which allow the induction of antigen presentation selectively on DCs without altering their maturation status, we show here that breakdown of CD8(+) T-cell tolerance, which ensues after depletion of suppressive CD4(+) T cells, is driven by a positive feedback loop in which autoreactive CD8(+) T cells activate DCs via CD40. These data identify ligation of CD40 on DCs as a stimulus that promotes autoreactive T-cell priming when regulatory T-cell suppression fails and suggest that feedback from autoreactive T cells to DCs may contribute to the well-documented involvement of CD40 in many autoimmune diseases. CI - (c) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. FAU - Muth, Sabine AU - Muth S AD - Institute for Immunology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany; Research Center for Immunology (FZI), Mainz, Germany. FAU - Schutze, Kristian AU - Schutze K FAU - Hain, Tobias AU - Hain T FAU - Yagita, Hideo AU - Yagita H FAU - Schild, Hansjorg AU - Schild H FAU - Probst, Hans Christian AU - Probst HC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140120 PL - Germany TA - Eur J Immunol JT - European journal of immunology JID - 1273201 RN - 0 (Antibodies, Monoclonal) RN - 0 (CD40 Antigens) RN - 0 (monoclonal antibody GK1.5) RN - 147205-72-9 (CD40 Ligand) SB - IM MH - Animals MH - Antibodies, Monoclonal/pharmacology MH - Antigen Presentation/immunology MH - Bone Marrow Transplantation MH - CD4-Positive T-Lymphocytes/*immunology/metabolism MH - CD40 Antigens/genetics/*immunology/metabolism MH - CD40 Ligand/genetics/*immunology/metabolism MH - CD8-Positive T-Lymphocytes/*immunology/metabolism MH - Cell Line, Tumor MH - Dendritic Cells/immunology/metabolism MH - Feedback, Physiological/drug effects MH - Flow Cytometry MH - Immune Tolerance/genetics/*immunology MH - Lymphocytic Choriomeningitis/immunology/virology MH - Lymphocytic choriomeningitis virus/immunology/physiology MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Mice, Transgenic MH - T-Lymphocytes, Cytotoxic/immunology/metabolism MH - Transplantation Chimera/blood/immunology OTO - NOTNLM OT - CD40 ligation OT - CD8+ T cells OT - Dendritic cells OT - Peripheral tolerance EDAT- 2014/01/15 06:00 MHDA- 2014/06/24 06:00 CRDT- 2014/01/15 06:00 PHST- 2013/05/24 00:00 [received] PHST- 2013/11/21 00:00 [revised] PHST- 2013/12/12 00:00 [accepted] PHST- 2014/01/15 06:00 [entrez] PHST- 2014/01/15 06:00 [pubmed] PHST- 2014/06/24 06:00 [medline] AID - 10.1002/eji.201343738 [doi] PST - ppublish SO - Eur J Immunol. 2014 Apr;44(4):1099-107. doi: 10.1002/eji.201343738. Epub 2014 Jan 20.