PMID- 25548232 OWN - NLM STAT- MEDLINE DCOM- 20150414 LR - 20150117 IS - 1550-6606 (Electronic) IS - 0022-1767 (Linking) VI - 194 IP - 3 DP - 2015 Feb 1 TI - CD26-mediated induction of EGR2 and IL-10 as potential regulatory mechanism for CD26 costimulatory pathway. PG - 960-72 LID - 10.4049/jimmunol.1402143 [doi] AB - CD26 is associated with T cell signal transduction processes as a costimulatory molecule, and CD26(+) T cells have been suggested to be involved in the pathophysiology of diverse autoimmune diseases. Although the cellular and molecular mechanisms involved in CD26-mediated T cell activation have been extensively evaluated by our group and others, potential negative feedback mechanisms to regulate CD26-mediated activation still remain to be elucidated. In the present study, we examine the expression of inhibitory molecules induced via CD26-mediated costimulation. We show that coengagement of CD3 and CD26 induces preferential production of IL-10 in human CD4(+) T cells, mediated through NFAT and Raf-MEK-ERK pathways. A high level of early growth response 2 (EGR2) is also induced following CD26 costimulation, possibly via NFAT and AP-1-mediated signaling, and knockdown of EGR2 leads to decreased IL-10 production. Furthermore, CD3/CD26-stimulated CD4(+) T cells clearly suppress proliferative activity and effector cytokine production of bystander T cells in an IL-10-dependent manner. Taken together, our data suggest that robust CD26 costimulatory signaling induces preferential expression of EGR2 and IL-10 as a potential mechanism for regulating CD26-mediated activation. CI - Copyright (c) 2015 by The American Association of Immunologists, Inc. FAU - Hatano, Ryo AU - Hatano R AD - Department of Therapy Development and Innovation for Immune Disorders and Cancers, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan; Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan; and. FAU - Ohnuma, Kei AU - Ohnuma K AD - Department of Therapy Development and Innovation for Immune Disorders and Cancers, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan; FAU - Otsuka, Haruna AU - Otsuka H AD - Department of Therapy Development and Innovation for Immune Disorders and Cancers, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan; FAU - Komiya, Eriko AU - Komiya E AD - Department of Therapy Development and Innovation for Immune Disorders and Cancers, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan; FAU - Taki, Izumi AU - Taki I AD - Department of Therapy Development and Innovation for Immune Disorders and Cancers, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan; FAU - Iwata, Satoshi AU - Iwata S AD - Department of Therapy Development and Innovation for Immune Disorders and Cancers, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan; FAU - Dang, Nam H AU - Dang NH AD - Division of Hematology/Oncology, University of Florida, Gainesville, FL 32610. FAU - Okumura, Ko AU - Okumura K AD - Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan; and. FAU - Morimoto, Chikao AU - Morimoto C AD - Department of Therapy Development and Innovation for Immune Disorders and Cancers, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan; morimoto@ims.u-tokyo.ac.jp. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141229 PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Cytokines) RN - 0 (Early Growth Response Protein 2) RN - 0 (NFATC Transcription Factors) RN - 130068-27-8 (Interleukin-10) RN - EC 2.7.11.1 (raf Kinases) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - EC 3.4.14.5 (Dipeptidyl Peptidase 4) SB - IM MH - Cytokines/metabolism MH - Dipeptidyl Peptidase 4/*metabolism MH - Early Growth Response Protein 2/genetics/*metabolism MH - Gene Expression MH - Humans MH - *Immunomodulation MH - Immunophenotyping MH - Interleukin-10/biosynthesis/*metabolism MH - Lymphocyte Activation MH - Mitogen-Activated Protein Kinases/metabolism MH - NFATC Transcription Factors/metabolism MH - Phenotype MH - *Signal Transduction MH - T-Lymphocyte Subsets/immunology/metabolism MH - T-Lymphocytes, Regulatory/immunology/metabolism MH - raf Kinases/metabolism EDAT- 2014/12/31 06:00 MHDA- 2015/04/15 06:00 CRDT- 2014/12/31 06:00 PHST- 2014/12/31 06:00 [entrez] PHST- 2014/12/31 06:00 [pubmed] PHST- 2015/04/15 06:00 [medline] AID - jimmunol.1402143 [pii] AID - 10.4049/jimmunol.1402143 [doi] PST - ppublish SO - J Immunol. 2015 Feb 1;194(3):960-72. doi: 10.4049/jimmunol.1402143. Epub 2014 Dec 29.