PMID- 34465532 OWN - NLM STAT- MEDLINE DCOM- 20220318 LR - 20220318 IS - 1440-1592 (Electronic) IS - 1323-8930 (Linking) VI - 71 IP - 1 DP - 2022 Jan TI - A novel detection method for cross-linking of IgE-receptors by autoantibodies in chronic spontaneous urticaria. PG - 94-102 LID - S1323-8930(21)00095-2 [pii] LID - 10.1016/j.alit.2021.08.007 [doi] AB - BACKGROUND: Autoantibodies (AAbs) against immunoglobulin E (IgE) antibodies (Abs) and their high-affinity receptor alpha subunits (FcepsilonRIalpha) are key factors in the elicitation of type IIb autoimmune chronic spontaneous urticaria (type IIb aiCSU). In this study, we aimed to develop a new method to detect functional anti-FcepsilonRIalpha and anti-IgE AAbs, which can crosslink the plural FcepsilonRcapital I, Ukrainianalpha molecules and IgE Abs on the surface of mast cells and basophils, in sera from aiCSU patients using the amplified luminescence proximity homogeneous assay (Alpha). METHODS: Sera were obtained from 14 aiCSU patients, as diagnosed by recurrent chronic spontaneous urticaria episodes and positive results for the autologous serum skin test and/or histamine release test (HRT). The AAbs to FcepsilonRIalpha and IgE Abs were determined in sera from aiCSU patients using enzyme-linked immunosorbent assay (ELISA) and Alpha by cross-linking (AlphaCL) of IgE Abs and/or FcepsilonRcapital I, Ukrainianalpha. RESULTS: Serum anti-FcepsilonRIalpha and anti-IgE AAb levels were not significantly different between aiCSU patients and healthy subjects in ELISA. Anti-FcepsilonRIalpha AAbs were detected in 10 of 14 aiCSU patients who displayed positive (5/5) and negative (5/9) results in the HRT for anti-FcepsilonRIalpha AAbs by AlphaCL, whereas no signals were observed in healthy subjects. Additionally, anti-IgE AAbs were detected in two of four aiCSU patients who displayed positive results in the HRT for anti-IgE AAbs. CONCLUSIONS: A new assay method using AlphaCL can detect anti-FcepsilonRIalpha and anti-IgE AAbs with FcepsilonRIalpha- and IgE-crosslinking abilities in sera from aiCSU patients. This simple and practical assay method may be available as a diagnostic tool for urticaria patients. CI - Copyright (c) 2021 Japanese Society of Allergology. Production and hosting by Elsevier B.V. All rights reserved. FAU - Koga, Yuki AU - Koga Y AD - Department of Pharmaceutical Services, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. FAU - Yokooji, Tomoharu AU - Yokooji T AD - Department of Pharmaceutical Services, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan; Department of Frontier Science for Pharmacotherapy, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. FAU - Ogino, Ryohei AU - Ogino R AD - Department of Frontier Science for Pharmacotherapy, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. FAU - Taogoshi, Takanori AU - Taogoshi T AD - Department of Pharmaceutical Services, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. FAU - Takahagi, Shunsuke AU - Takahagi S AD - Department of Dermatology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. FAU - Ishii, Kaori AU - Ishii K AD - Department of Dermatology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. FAU - Chinuki, Yuko AU - Chinuki Y AD - Department of Dermatology, Shimane University Faculty of Medicine, Izumo, Japan. FAU - Morita, Eishin AU - Morita E AD - Department of Dermatology, Shimane University Faculty of Medicine, Izumo, Japan. FAU - Hide, Michihiro AU - Hide M AD - Department of Dermatology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. FAU - Matsuo, Hiroaki AU - Matsuo H AD - Department of Pharmaceutical Services, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. Electronic address: hmatsuo@hiroshima-u.ac.jp. LA - eng PT - Journal Article DEP - 20210828 PL - England TA - Allergol Int JT - Allergology international : official journal of the Japanese Society of Allergology JID - 9616296 RN - 0 (Autoantibodies) RN - 0 (FCER1A protein, human) RN - 0 (Receptors, IgE) SB - IM MH - Adult MH - Aged MH - Autoantibodies/*immunology MH - Case-Control Studies MH - Chronic Urticaria/*blood MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Histamine Release MH - Humans MH - Male MH - Middle Aged MH - Receptors, IgE/antagonists & inhibitors/blood/*immunology MH - Skin/chemistry MH - Skin Tests OTO - NOTNLM OT - Amplified luminescence proximity homogeneous assay OT - Autoantibody OT - Chronic spontaneous urticaria OT - Cross-linking OT - FcepsilonRIalpha EDAT- 2021/09/02 06:00 MHDA- 2022/03/19 06:00 CRDT- 2021/09/01 05:53 PHST- 2021/06/21 00:00 [received] PHST- 2021/07/14 00:00 [revised] PHST- 2021/07/24 00:00 [accepted] PHST- 2021/09/02 06:00 [pubmed] PHST- 2022/03/19 06:00 [medline] PHST- 2021/09/01 05:53 [entrez] AID - S1323-8930(21)00095-2 [pii] AID - 10.1016/j.alit.2021.08.007 [doi] PST - ppublish SO - Allergol Int. 2022 Jan;71(1):94-102. doi: 10.1016/j.alit.2021.08.007. Epub 2021 Aug 28.