PMID- 23380742 OWN - NLM STAT- MEDLINE DCOM- 20130528 LR - 20210202 IS - 1528-0020 (Electronic) IS - 0006-4971 (Linking) VI - 121 IP - 14 DP - 2013 Apr 4 TI - Notch controls generation and function of human effector CD8+ T cells. PG - 2638-46 LID - 10.1182/blood-2012-07-442962 [doi] AB - The generation of effector CD8(+) T cells with lytic capacity is crucial for tumor control. Dendritic cells (DCs) provide important signals to promote naive CD8(+) T cell priming and activation of effector T cells. Here, we report that the Notch pathway has an important role in both these processes in human CD8(+) T cells. Activated monocyte-derived DCs express Notch ligands Jagged1 and Delta-like4, whereas naive CD8(+) T cells express Notch2. The role for Notch signaling in CD8(+) T cell priming was determined using an ex-vivo model system in which tumor antigen-specific primary CD8(+) T cell responses were measured. Inhibition of Notch using gamma-secretase inhibitors or soluble Delta-like4-Fc during activation reduced expansion of antigen-specific CD8(+) T cells, which was mirrored by decreased frequencies of interferon (IFN)gamma-, tumor necrosis factor-alpha-, and granzymeB-producing CD8(+) T cells. Moreover, T cells primed when Notch signaling was prevented are functionally low-avidity T cells. In addition, Notch partially regulates established effector T cell function. Activation-induced Notch signaling is needed for IFNgamma release but not for cytolytic activity. These data indicate that Notch signaling controls human CD8(+) T cell priming and also influences effector T cell functions. This may provide important information for designing new immunotherapies for treatment of cancer. FAU - Kuijk, Loes M AU - Kuijk LM AD - Department of Molecular Cell Biology and Immunology, VU University Medical Center Amsterdam, Amsterdam, The Netherlands. FAU - Verstege, Marleen I AU - Verstege MI FAU - Rekers, Niels V AU - Rekers NV FAU - Bruijns, Sven C AU - Bruijns SC FAU - Hooijberg, Erik AU - Hooijberg E FAU - Roep, Bart O AU - Roep BO FAU - de Gruijl, Tanja D AU - de Gruijl TD FAU - van Kooyk, Yvette AU - van Kooyk Y FAU - Unger, Wendy W J AU - Unger WW LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130204 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (MART-1 Antigen) RN - 0 (NOTCH1 protein, human) RN - 0 (NOTCH2 protein, human) RN - 0 (Receptor, Notch1) RN - 0 (Receptor, Notch2) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Antigen Presentation/immunology MH - CD8-Positive T-Lymphocytes/cytology/*immunology/metabolism MH - Cell Communication/immunology MH - Cells, Cultured MH - Dendritic Cells/cytology/immunology/metabolism MH - Humans MH - Interferon-gamma/metabolism MH - Lymphocyte Activation/*immunology MH - MART-1 Antigen/immunology/metabolism MH - Monocytes/cytology/immunology/metabolism MH - Neoplasms/immunology/prevention & control MH - Receptor, Notch1/*immunology/metabolism MH - Receptor, Notch2/*immunology/metabolism MH - Signal Transduction/*immunology EDAT- 2013/02/06 06:00 MHDA- 2013/05/29 06:00 CRDT- 2013/02/06 06:00 PHST- 2013/02/06 06:00 [entrez] PHST- 2013/02/06 06:00 [pubmed] PHST- 2013/05/29 06:00 [medline] AID - S0006-4971(20)47361-6 [pii] AID - 10.1182/blood-2012-07-442962 [doi] PST - ppublish SO - Blood. 2013 Apr 4;121(14):2638-46. doi: 10.1182/blood-2012-07-442962. Epub 2013 Feb 4.