PMID- 20138879 OWN - NLM STAT- MEDLINE DCOM- 20100426 LR - 20161125 IS - 1873-3468 (Electronic) IS - 0014-5793 (Linking) VI - 584 IP - 6 DP - 2010 Mar 19 TI - Oxysterol represses high-affinity IgE receptor-stimulated mast cell activation in Liver X receptor-dependent and -independent manners. PG - 1143-8 LID - 10.1016/j.febslet.2010.02.006 [doi] AB - Oxysterols activating liver X receptors (LXRs) repress expression of pro-inflammatory genes and have anti-inflammatory effects. Here, we show for the first time that bone marrow-derived murine mast cells (BMMCs) predominantly express LXRbeta. 25-hydroxycholesterol, a representative LXR activating oxysterol, suppressed IL-6 production and degranulation response in BMMCs following engagement of high-affinity IgE receptor (FcepsilonRI). Interestingly, 25-hydroxycholesterol reduced cell-surface FcepsilonRI expression by inhibiting assembly of FcepsilonRIalpha and FcepsilonRIbeta. We demonstrate that LXR activation was involved in the suppression of IL-6 production in BMMCs, but that reduced FcepsilonRI expression and degranulation response was mediated in an LXR-independent manner. CI - Copyright 2010 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved. FAU - Nunomura, Satoshi AU - Nunomura S AD - Division of Molecular Cell Immunology and Allergology, Advanced Medical Research Center, Nihon University Graduate School of Medical Science, Tokyo, Japan. FAU - Endo, Kaori AU - Endo K FAU - Makishima, Makoto AU - Makishima M FAU - Ra, Chisei AU - Ra C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100209 PL - England TA - FEBS Lett JT - FEBS letters JID - 0155157 RN - 0 (Cholestanols) RN - 0 (Hydroxycholesterols) RN - 0 (Interleukin-6) RN - 0 (LY 295427) RN - 0 (Liver X Receptors) RN - 0 (Orphan Nuclear Receptors) RN - 0 (Receptors, IgE) RN - 0 (Sterols) RN - 767JTD2N31 (25-hydroxycholesterol) SB - IM MH - Animals MH - Antibody Affinity/drug effects MH - Bone Marrow Cells/drug effects/immunology/metabolism/physiology MH - Cell Degranulation/drug effects MH - Cells, Cultured MH - Cholestanols/pharmacology MH - Down-Regulation/drug effects MH - Hydroxycholesterols/pharmacology MH - Interleukin-6/metabolism MH - Liver X Receptors MH - Mast Cells/*drug effects/immunology/metabolism/physiology MH - Mice MH - Mice, Inbred C57BL MH - Orphan Nuclear Receptors/agonists/metabolism/*physiology MH - Receptors, IgE/metabolism/*physiology MH - Signal Transduction/drug effects/physiology MH - Sterols/*pharmacology EDAT- 2010/02/09 06:00 MHDA- 2010/04/27 06:00 CRDT- 2010/02/09 06:00 PHST- 2009/11/06 00:00 [received] PHST- 2010/01/08 00:00 [revised] PHST- 2010/02/01 00:00 [accepted] PHST- 2010/02/09 06:00 [entrez] PHST- 2010/02/09 06:00 [pubmed] PHST- 2010/04/27 06:00 [medline] AID - S0014-5793(10)00100-6 [pii] AID - 10.1016/j.febslet.2010.02.006 [doi] PST - ppublish SO - FEBS Lett. 2010 Mar 19;584(6):1143-8. doi: 10.1016/j.febslet.2010.02.006. Epub 2010 Feb 9.