PMID- 18094328 OWN - NLM STAT- MEDLINE DCOM- 20080425 LR - 20211027 IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 111 IP - 6 DP - 2008 Mar 15 TI - The inhibitory receptor LILRB1 modulates the differentiation and regulatory potential of human dendritic cells. PG - 3090-6 AB - Dendritic cells (DCs) link innate and adaptive immunity, initiating and regulating effector cell responses. They ubiquitously express members of the LILR (ILT, LIR, CD85) family of molecules, some of which recognize self-HLA molecules, but little is known of their possible functions in DC biology. We demonstrate that the inhibitory receptor LILRB1 (ILT2, LIR1, CD85j) is selectively up-regulated during DC differentiation from monocyte precursors in culture. Continuous ligation of LILRB1 modulated cellular differentiation, conferred a unique phenotype upon the resultant cells, induced a profound resistance to CD95-mediated cell death, and inhibited secretion of cytokines IL-10, IL-12p70, and TGF-beta. These features remained stable even after exposure of the cells to bacterial LPS. Ligated DCs exhibited poor stimulatory activity for primary and memory T-cell proliferative responses, but this was substantially reversed by blockade of CD80 or its preferred ligand CTLA-4, or by depleting CD4(+) CD25(+) CD127(lo) regulatory T cells. Our findings suggest that ligation of LILRB1 on DCs by self-HLA molecules may play a key role in controlling the balance between the induction and suppression of adaptive immune responses. FAU - Young, Neil T AU - Young NT AD - Division of Immunology, Department of Pathology, University of Cambridge, Cambridge, UK. nty20@cam.ac.uk FAU - Waller, Edward C P AU - Waller EC FAU - Patel, Rashmi AU - Patel R FAU - Roghanian, Ali AU - Roghanian A FAU - Austyn, Jonathan M AU - Austyn JM FAU - Trowsdale, John AU - Trowsdale J LA - eng GR - G0401569/MRC_/Medical Research Council/United Kingdom GR - G9800943/MRC_/Medical Research Council/United Kingdom GR - WT_/Wellcome Trust/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20071219 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (Antigens, CD) RN - 0 (Cytokines) RN - 0 (LILRB1 protein, human) RN - 0 (Leukocyte Immunoglobulin-like Receptor B1) RN - 0 (Lipopolysaccharides) RN - 0 (Receptors, Immunologic) RN - 0 (fas Receptor) RN - 21820-51-9 (Phosphotyrosine) SB - IM MH - Antigens, CD/*metabolism MH - Cell Differentiation/*drug effects/*immunology MH - Cells, Cultured MH - Cytokines/metabolism MH - Dendritic Cells/*cytology/drug effects/immunology/*metabolism MH - Humans MH - Immunologic Memory/immunology MH - Leukocyte Immunoglobulin-like Receptor B1 MH - Lipopolysaccharides/pharmacology MH - Phenotype MH - Phosphotyrosine/metabolism MH - Receptors, Immunologic/*antagonists & inhibitors/*metabolism MH - fas Receptor/immunology EDAT- 2007/12/21 09:00 MHDA- 2008/04/26 09:00 CRDT- 2007/12/21 09:00 PHST- 2007/12/21 09:00 [pubmed] PHST- 2008/04/26 09:00 [medline] PHST- 2007/12/21 09:00 [entrez] AID - S0006-4971(20)48618-5 [pii] AID - 10.1182/blood-2007-05-089771 [doi] PST - ppublish SO - Blood. 2008 Mar 15;111(6):3090-6. doi: 10.1182/blood-2007-05-089771. Epub 2007 Dec 19.