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Comparison of the in vivo autologous skin test with in vitro diagnostic tests for diagnosis of chronic autoimmune urticaria

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Previous studies indicate that 30‐50% of chronic urticaria patients have an autoimmune etiology. Clinical diagnosis of autoimmune urticaria is supported with the autologous serum skin test. The purpose of this study was to compare two laboratory tests for measurement of IgG autoantibodies to IgE or IgE receptors and compare the results with the autologous serum and plasma skin tests. We performed skin tests and two functional in vitro tests, basophil histamine release, and CD63 up-regulation to detect autoantibodies relevant to autoimmune urticaria. Both sera and citrated plasma were evaluated in the autologous skin test and histamine release assay. Thyroid autoantibodies were also measured. Basophils were incubated with patient plasma, sera, buffer, or anti-IgE. The cells were analyzed for CD63 expression and the supernatants were recovered for histamine analysis. There was high correlation between CD63 up-regulation and histamine release assays, but histamine release was more sensitive. There was a high concordance between sera and citrated plasma for the skin test. Sera from chronic urticaria patients produced higher mean histamine release (23%) compared with citrated plasma (12%). Thirty-one percent of patients positive in the histamine release assay were also positive for thyroid autoantibodies. This compares with 12% who were negative in the histamine release assay. These data show that in vitro basophil histamine release can be used to measure antibodies to FceRI, FceRII/CD23, or IgE and identify patients with autoimmune urticaria.
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Keywords: Anti-FceR; CD63; autoantibodies; autoimmune; autologous skin test; basophil; chronic urticaria; histamine release test; in vivo test; thyroid autoantibodies

Document Type: Research Article

Affiliations: IBT Laboratories, Lenexa, Kansas

Publication date: January 1, 2009

More about this publication?
  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma and by having the potential to directly impact the quality of patient care. AAP welcomes the submission of original works including peer-reviewed original research and clinical trial results. Additionally, as the official journal of the Eastern Allergy Conference (EAC), AAP will publish content from EAC poster sessions as well as review articles derived from EAC lectures.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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