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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/7131

Title: Immunoglobulin E and systemic lupus erythematosus
Other Titles: Brazilian Journal of Medical and Biological Research
Authors: Atta, Ajax Mercês
Sousa, C. P.
Carvalho Filho, Edgar Marcelino de
Atta, Maria Luiza Brito de Sousa
Keywords: Systemic lupus erythematosus;Antinuclear IgE antibody;Allergy;IgG anti-IgE;IgE
Issue Date: 2004
Abstract: Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by intense polyclonal production of autoantibodies and circulating immune complexes. Some reports have associated SLE with a Th2 immune response and allergy. In the present study 21 female patients with SLE were investigated for total IgE and IgE antibodies to dust house aeroallergens by an automated enzyme-linked fluorescent assay, and were also evaluated for antinuclear IgE autoantibodies by a modified indirect immunofluorescence test using HEp-2 cells as antigen substrate. Additionally, immunocapture ELISA was used to investigate serum anti-IgE IgG autoantibodies. Serum IgE above 150 IU/ml, ranging from 152 to 609 IU/ml (median = 394 IU IgE/ml), was observed in 7 of 21 SLE patients (33%), 5 of them presenting proteinuria, urinary cellular casts and augmented production of anti-dsDNA antibodies. While only 2 of 21 SLE patients (9.5%) were positive for IgE antibodies to aeroallergens, all 10 patients with respiratory allergy (100%) from the atopic control group (3 males and 7 females), had these immunoglobulins. SLE patients and healthy controls presented similar anti-IgE IgG autoantibody titers (X = 0.37 ± 0.20 and 0.34 ± 0.18, respectively), differing from atopic controls (0.94 ± 0.26). Antinuclear IgE autoantibodies were detected in 17 of 21 (81%) sera from SLE patients, predominating the fine speckled pattern of fluorescence, that was also observed in IgG-ANA. Concluding, SLE patients can present increased IgE levels and antinuclear IgE autoantibodies without specific clinical signs of allergy or production of antiallergen IgE antibodies, excluding a possible association between SLE and allergy.
Description: p. 1497-1501
URI: http://www.repositorio.ufba.br/ri/handle/ri/7131
ISSN: 1414-431X
Appears in Collections:Artigos Publicados em Periódicos (FARMACIA)

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