PMID- 25522877 OWN - NLM STAT- MEDLINE DCOM- 20150313 LR - 20141231 IS - 1090-2104 (Electronic) IS - 0006-291X (Linking) VI - 456 IP - 2 DP - 2015 Jan 9 TI - Treatment of murine mast cells with IgEkappa and protein L enhances apoptotic cell death induced by IL-3 withdrawal. PG - 700-5 LID - S0006-291X(14)02211-6 [pii] LID - 10.1016/j.bbrc.2014.12.045 [doi] AB - Engagement of the high-affinity IgE receptor (FcepsilonRI) can be either protective or non-protective against apoptotic cell death (ACD) in bone marrow-derived murine mast cells (BMMCs) after IL-3 withdrawal, depending on the avidity between IgE and its antigen. We recently reported that protein L (PpL), a bacterial Igkappa-binding soluble protein, is able to stimulate intracellular signaling to induce activation of BMMCs by interacting with the IgEkappa-FcepsilonRI complex. However, it is unclear if cross-linking of FcepsilonRI with IgEkappa and PpL prevents or enhances IL-3-dependent ACD in BMMCs. In the present study, we found that IL-3-dependent ACD of BMMCs is accelerated by loading soluble PpL in the presence of IgEkappa-occupied FcepsilonRIalpha. For this purpose, soluble PpL was incorporated into the BMMCs. Unlike soluble PpL, immobilized PpL failed to enhance ACD, although both forms of PpL induced IL-6 production equally in BMMCs. In addition, we observed that DNS5-BSA protected anti-DNS IgE-sensitized BMMCs from IL-3 depletion-mediated ACD by inducing the production of autocrine IL-3. In contrast, DNS5-PpL enhanced IL-3 withdrawal-induced ACD of anti-DNS IgE-sensitized BMMCs and reduced the production of autocrine IL-3. These findings suggest that PpL increases IL-3 withdrawal-induced ACD of IgEkappa-sensitized BMMCs by incorporating PpL into the BMMCs and that this internalized PpL may interfere with survival signals via FcepsilonRI. CI - Copyright (c) 2014 Elsevier Inc. All rights reserved. FAU - Nunomura, Satoshi AU - Nunomura S AD - Department of Dermatology, Nihon University School of Medicine, Tokyo, Japan; Allergy and Immunology Group, Research Institute of Medical Science, Nihon University School of Medicine, Tokyo, Japan. Electronic address: nunomura.satoshi@nihon-u.ac.jp. FAU - Okayama, Yoshimichi AU - Okayama Y AD - Allergy and Immunology Group, Research Institute of Medical Science, Nihon University School of Medicine, Tokyo, Japan. FAU - Terui, Tadashi AU - Terui T AD - Department of Dermatology, Nihon University School of Medicine, Tokyo, Japan. FAU - Ra, Chisei AU - Ra C AD - Allergy and Immunology Group, Research Institute of Medical Science, Nihon University School of Medicine, Tokyo, Japan; Department of Microbiology, Nihon University School of Medicine, Tokyo, Japan; Asahi Hospital, Chiba, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141215 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Antibodies, Monoclonal) RN - 0 (Bacterial Proteins) RN - 0 (Ig L-binding protein, Peptostreptococcus) RN - 0 (Immobilized Proteins) RN - 0 (Immunoglobulin kappa-Chains) RN - 0 (Interleukin-3) RN - 0 (Receptors, IgE) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Animals MH - Antibodies, Monoclonal/immunology/pharmacology MH - Apoptosis/drug effects/*immunology MH - Bacterial Proteins/*immunology/pharmacology MH - Cells, Cultured MH - Immobilized Proteins/immunology/pharmacology MH - Immunoglobulin E/*immunology MH - Immunoglobulin kappa-Chains/*immunology MH - Interleukin-3/*immunology MH - Mast Cells/drug effects/*immunology MH - Mice MH - Mice, Inbred C57BL MH - Receptors, IgE/*immunology OTO - NOTNLM OT - Cell death OT - IgE receptor OT - Mast cells OT - Protein L OT - Superantigen EDAT- 2014/12/20 06:00 MHDA- 2015/03/17 06:00 CRDT- 2014/12/20 06:00 PHST- 2014/11/14 00:00 [received] PHST- 2014/12/09 00:00 [accepted] PHST- 2014/12/20 06:00 [entrez] PHST- 2014/12/20 06:00 [pubmed] PHST- 2015/03/17 06:00 [medline] AID - S0006-291X(14)02211-6 [pii] AID - 10.1016/j.bbrc.2014.12.045 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2015 Jan 9;456(2):700-5. doi: 10.1016/j.bbrc.2014.12.045. Epub 2014 Dec 15.