Ota Y, Fujiwara M, Hirabayashi Y, Kumasaka T, Takemura T, Ota R, Suzuki M, Inokuma S. Eosinophilic granulomatosis with polyangiitis demonstrating IgE-immune complexes and the possible involvement of IgE autoantibodies.
Intern Med 2015;
54:2687-91. [PMID:
26466712 DOI:
10.2169/internalmedicine.54.4588]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We herein report a case of female eosinophilic granulomatosis with polyangiitis (EGPA) in which polyethylene glycol (PEG) precipitation was used to evaluate the patient's levels IgE-immune complexes (IC). Her serum IgE (7,110 IU/mL) and IgE-IC (1,880 IU/mL) levels were observed with an IgE PEG precipitated index of 26.4%. We speculate that the circulating IgE-IC were formed by anti-neutrophil IgE autoantibodies. Therefore, the large amount of IgE autoantibodies in the patient's serum appears to have induced a constant allergic pathology. This pathology may have resulted in a marked infiltration of eosinophils into the tissues, as well as intensified the EGPA pathology.
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