PMID- 25176657 OWN - NLM STAT- MEDLINE DCOM- 20150528 LR - 20140913 IS - 2211-1247 (Electronic) VI - 8 IP - 5 DP - 2014 Sep 11 TI - IkappaB kinase 2 is essential for IgE-induced mast cell de novo cytokine production but not for degranulation. PG - 1300-7 LID - S2211-1247(14)00630-5 [pii] LID - 10.1016/j.celrep.2014.07.046 [doi] AB - The immunoglobulin E (IgE)-mediated mast cell (MC) response is central to the pathogenesis of type I allergy and asthma. IkappaB kinase 2 (IKK2) was reported to couple IgE-induced signals to MC degranulation by phosphorylating the SNARE protein SNAP23. We investigated MC responses in mice with MC-specific inactivation of IKK2 or NF-kappaB essential modulator (NEMO), or animals with MC-specific expression of a mutant, constitutively active IKK2. We show that the IgE-induced late-phase cytokine response is reduced in mice lacking IKK2 or NEMO in MCs. However, anaphylactic in vivo responses of these animals are not different from those of control mice, and in vitro IKK2-deficient MCs readily phosphorylate SNAP23 and degranulate similarly to control cells in response to allergen or calcium ionophore. Constitutive overactivation of the NF-kappaB pathway has only slight effects on allergen-triggered MC responses. Thus, IKK2 is dispensable for MC degranulation, and the important question how IgE-induced signals trigger MC vesicle fusion remains open. CI - Copyright (c) 2014 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Peschke, Katrin AU - Peschke K AD - Institute for Immunology, Technische Universitat Dresden, Medical Faculty Carl Gustav Carus, 01307 Dresden, Germany. FAU - Weitzmann, Anke AU - Weitzmann A AD - Institute for Immunology, Technische Universitat Dresden, Medical Faculty Carl Gustav Carus, 01307 Dresden, Germany. FAU - Heger, Klaus AU - Heger K AD - Department of Hematology and Oncology, Klinikum rechts der Isar, Technische Universitat Munchen, 81737 Munchen, Germany. FAU - Behrendt, Rayk AU - Behrendt R AD - Institute for Immunology, Technische Universitat Dresden, Medical Faculty Carl Gustav Carus, 01307 Dresden, Germany. FAU - Schubert, Nadja AU - Schubert N AD - Institute for Immunology, Technische Universitat Dresden, Medical Faculty Carl Gustav Carus, 01307 Dresden, Germany. FAU - Scholten, Julia AU - Scholten J AD - Quintiles, GmbH, 63263 Neu-Isenburg, Germany. FAU - Voehringer, David AU - Voehringer D AD - Department of Infection Biology, Universitatsklinikum Erlangen, 91054 Erlangen, Germany. FAU - Hartmann, Karin AU - Hartmann K AD - Department of Dermatology, University of Cologne, 50937 Cologne, Germany. FAU - Dudeck, Anne AU - Dudeck A AD - Institute for Immunology, Technische Universitat Dresden, Medical Faculty Carl Gustav Carus, 01307 Dresden, Germany. FAU - Schmidt-Supprian, Marc AU - Schmidt-Supprian M AD - Department of Hematology and Oncology, Klinikum rechts der Isar, Technische Universitat Munchen, 81737 Munchen, Germany. Electronic address: supprian@lrz.tum.de. FAU - Roers, Axel AU - Roers A AD - Institute for Immunology, Technische Universitat Dresden, Medical Faculty Carl Gustav Carus, 01307 Dresden, Germany. Electronic address: axel.roers@tu-dresden.de. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140828 PL - United States TA - Cell Rep JT - Cell reports JID - 101573691 RN - 0 (Allergens) RN - 0 (Cytokines) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (NEMO protein, mouse) RN - 0 (NF-kappa B) RN - 0 (Qb-SNARE Proteins) RN - 0 (Qc-SNARE Proteins) RN - 0 (Snap23 protein, mouse) RN - 37341-29-0 (Immunoglobulin E) RN - EC 2.7.11.10 (I-kappa B Kinase) RN - EC 2.7.11.10 (Ikbkb protein, mouse) SB - IM MH - Allergens/immunology MH - Anaphylaxis/metabolism MH - Animals MH - *Cell Degranulation MH - Cytokines/genetics/*metabolism MH - I-kappa B Kinase/genetics/*metabolism MH - Immunoglobulin E/*immunology MH - Intracellular Signaling Peptides and Proteins/genetics/metabolism MH - Mast Cells/immunology/*metabolism/physiology MH - Mice MH - Mice, Inbred C57BL MH - NF-kappa B/metabolism MH - Qb-SNARE Proteins/metabolism MH - Qc-SNARE Proteins/metabolism EDAT- 2014/09/02 06:00 MHDA- 2015/05/29 06:00 CRDT- 2014/09/02 06:00 PHST- 2013/10/07 00:00 [received] PHST- 2014/06/06 00:00 [revised] PHST- 2014/07/25 00:00 [accepted] PHST- 2014/09/02 06:00 [entrez] PHST- 2014/09/02 06:00 [pubmed] PHST- 2015/05/29 06:00 [medline] AID - S2211-1247(14)00630-5 [pii] AID - 10.1016/j.celrep.2014.07.046 [doi] PST - ppublish SO - Cell Rep. 2014 Sep 11;8(5):1300-7. doi: 10.1016/j.celrep.2014.07.046. Epub 2014 Aug 28.