PMID- 16317102 OWN - NLM STAT- MEDLINE DCOM- 20060508 LR - 20220223 IS - 0006-4971 (Print) IS - 1528-0020 (Electronic) IS - 0006-4971 (Linking) VI - 107 IP - 7 DP - 2006 Apr 1 TI - SLAM/SLAM interactions inhibit CD40-induced production of inflammatory cytokines in monocyte-derived dendritic cells. PG - 2821-9 AB - Signaling lymphocyte activation molecule (SLAM, CD150, or SLAMF1) is a self-ligand receptor on the surface of activated T- and B-lymphocytes, macrophages, and dendritic cells (DCs). Here we examine the effect of SLAM/SLAM interactions on CD40L-induced CD40 signaling pathways in human DCs. CD40L-expressing L929 cells induced DCs to produce interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-alpha), and IL-12, which was strongly inhibited by coexpression of SLAM on the surface of the L929 cells. Similarly, transfection of DCs with SLAM strongly reduced CD40L-induced IL-12 production. Furthermore, the negative effect of SLAM/SLAM interactions on CD40L-induced DC activation was also detected in the presence of lipopolysaccharide (LPS). LPS-induced IL-12 secretion, however, was not inhibited by SLAM engagement. CD40L-activated DCs affected by exposure to SLAM/SLAM engagement were impaired in their ability to induce differentiation of naive T lymphocytes into interferon-gamma (IFN-gamma)-producing T-helper 1 (Th1) effector cells. These inhibitory effects were not the result of a general unresponsiveness of DCs to CD40L, as SLAM/SLAM interactions did not prevent CD40L-induced up-regulation of CD83, CD86, or human leukocyte antigen (HLA)-DQ on the surface of DCs. Taken together, the results indicate that SLAM/SLAM interactions inhibit CD40-induced signal transduction in monocyte-derived dendritic cells, an effect that was not detectable in earlier studies using anti-SLAM monoclonal antibodies. FAU - Rethi, Bence AU - Rethi B AD - Institute of Immunology, University of Debrecen Medical and Health Science Center, 98 Nagyerdei krt, H-4012 Debrecen, Hungary. FAU - Gogolak, Peter AU - Gogolak P FAU - Szatmari, Istvan AU - Szatmari I FAU - Veres, Agota AU - Veres A FAU - Erdos, Erika AU - Erdos E FAU - Nagy, Laszlo AU - Nagy L FAU - Rajnavolgyi, Eva AU - Rajnavolgyi E FAU - Terhorst, Cox AU - Terhorst C FAU - Lanyi, Arpad AU - Lanyi A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20051129 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (Antigens, CD) RN - 0 (CD40 Antigens) RN - 0 (Cytokines) RN - 0 (DNA Primers) RN - 0 (Glycoproteins) RN - 0 (Immunoglobulins) RN - 0 (Receptors, Cell Surface) RN - 0 (SLAMF1 protein, human) RN - 0 (Slamf1 protein, mouse) RN - 147205-72-9 (CD40 Ligand) RN - 169535-43-7 (Signaling Lymphocytic Activation Molecule Family Member 1) SB - IM MH - Animals MH - Antigens, CD/genetics/immunology MH - CD40 Antigens/*immunology MH - CD40 Ligand/*immunology MH - Cytokines/*biosynthesis MH - DNA Primers MH - Dendritic Cells/*immunology MH - Glycoproteins/genetics/*immunology MH - Humans MH - Immunoglobulins/genetics/*immunology MH - Immunomagnetic Separation MH - Inflammation/immunology MH - L Cells MH - Mice MH - Monocytes/cytology/*immunology MH - Polymerase Chain Reaction MH - Receptors, Cell Surface MH - Signaling Lymphocytic Activation Molecule Family Member 1 MH - Transfection PMC - PMC1895370 EDAT- 2005/12/01 09:00 MHDA- 2006/05/09 09:00 PMCR- 2007/04/01 CRDT- 2005/12/01 09:00 PHST- 2005/12/01 09:00 [pubmed] PHST- 2006/05/09 09:00 [medline] PHST- 2005/12/01 09:00 [entrez] PHST- 2007/04/01 00:00 [pmc-release] AID - S0006-4971(20)65622-1 [pii] AID - 2821 [pii] AID - 10.1182/blood-2005-06-2265 [doi] PST - ppublish SO - Blood. 2006 Apr 1;107(7):2821-9. doi: 10.1182/blood-2005-06-2265. Epub 2005 Nov 29.