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      IgA, IgE e subclasses de IgG anti-Candida albicans no soro e lavado vaginal de pacientes com candidíase vulvovaginal Translated title: IgA, IgE and IgG subclasses to Candida albicans in serum and vaginal fluid from patients with vulvovaginal candidiasis

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          Abstract

          OBJETIVO: Determinar níveis de anticorpos IgA, IgE, IgG e subclasses (IgG1, IgG4) específicos a C. albicans no soro e lavado vaginal de mulheres com ou sem candidíase vulvovaginal para avaliar o papel destes anticorpos na imunopatogênese desta doença. MÉTODOS: Foram selecionadas 30 mulheres com sintomas clínicos de candidíase vulvovaginal (15 com cultura de secreção vaginal positiva para C. albicans, 11 com cultura negativa e quatro com cultura positiva para Candida não-albicans) e 12 mulheres controles assintomáticas (nove com cultura negativa). Amostras de soro e lavado vaginal foram obtidas para a detecção de anticorpos anti-C. albicans por ELISA. RESULTADOS: Pacientes sintomáticas com cultura positiva apresentaram níveis de IgA específicas significativamente maiores no lavado vaginal e menores no soro do que aquelas com cultura negativa. Níveis séricos de IgE específica foram extremamente baixos em relação ao lavado vaginal. Altos níveis de IgG total específica foram encontrados no soro e lavado vaginal em ambos os grupos, independente da presença do fungo. Níveis de IgG1 e IgG4 específicas foram significativamente maiores somente no lavado vaginal de mulheres sintomáticas e cultura positiva, com relação IgG1/IgG4 ligeiramente maior, indicando que a resposta de anticorpos IgG1 possa estar predominantemente envolvida na resolução da infecção fúngica. CONCLUSÕES: Nossos resultados indicam resposta acentuada de IgA, IgG1 e IgG4 anti-C. albicans no lavado vaginal de mulheres sintomáticas com cultura positiva, sugerindo importante papel destes anticorpos na resposta imune local estimulada pela presença do fungo.

          Translated abstract

          PURPOSE: To determine the levels of IgA, IgE, IgG and subclasses (IgG1, IgG4) antibodies specific to C. albicans in serum and vaginal washes from women with or without vulvovaginal candidiasis in order to evaluate the role of these antibodies in the immunopathogenesis of the disease. METHODS: Thirty women with clinical symptoms of vulvovaginal candidiasis (15 positive vaginal culture to C. albicans, 11 negative culture and 4 positive culture to non-C. albicans) and 12 asymptomatic control women were selected. Serum and vaginal wash samples were obtained for the detection of anti-C. albicans antibodies by ELISA. RESULTS: Symptomatic patients with positive culture showed significantly higher levels of specific IgA in vaginal washes and lower in serum than those with negative culture. Specific serum IgE levels were very low compared to vaginal IgE. High levels of total specific IgG were found in serum and vaginal washes in both groups, regardless the fungal presence or absence. Specific IgG1 e IgG4 levels were significantly higher only in vaginal washes from symptomatic patients with positive culture, with a slightly higher IgG1/IgG4 ratio, indicating that the IgG1 antibody response may be predominantly involved in the fungal clearance. CONCLUSION: Our results indicate a pronounced antibody response of IgA, IgG1 and IgG4 to C. albicans in vaginal washes in symptomatic patients with positive culture, suggesting a important role of these antibodies in the local immune response triggered by the presence of the fungus.

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          Most cited references17

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          Candidal vulvovaginitis.

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            Regional specialization in the mucosal immune system: primed cells do not always home along the same track.

            According to the current paradigm of lymphocyte trafficking, primed B and T cells extravasate in the intestinal lamina propria chiefly by means of the mucosal homing receptor alpha4beta7, which interacts with the vascular addressin MAdCAM-1. However, as discussed here, this mechanism cannot explain the preferential homing of B cells with a high level of J-chain expression to mucosal effector sites outside the gut.
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              A localized vaginal allergic response in women with recurrent vaginitis.

              In women with recurring vaginitis, treatment of a vaginal Candida infection is not always accompanied by an alleviation of symptoms, and infection frequently reappears after termination of the chemotherapeutic agent. To determine whether an allergic reaction might be involved in symptom prolongation and susceptibility to reinfection, sera and vaginal washes from patients were examined for specific IgE antibodies. With RAST modified to ELISA, anti-Candida albicans IgE was identified in 18.8% of saline vaginal washes, but in only 6.1% of sera, obtained from 64 patients. Similarly, 25% of 16 patients were positive for vaginal fluid IgE, but only 6.3% had serum IgE to their partners' seminal fluid. The detection of specific IgE antibodies vaginally but not in the peripheral circulation suggested the occurrence of a localized vaginal hypersensitivity response. Vaginal fluid-derived IgE antibodies reactive with contraceptive spermicides or present in the particulate fraction of saline vaginal washes were also identified. Vaginal fluids with IgE antibodies also contained detectable levels of prostaglandin E2. A vaginal allergic response can predispose to recurrent Candida infection by inducing prostaglandin E2 synthesis that suppresses cell-mediated immune responses.
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                Author and article information

                Journal
                ramb
                Revista da Associação Médica Brasileira
                Rev. Assoc. Med. Bras.
                Associação Médica Brasileira (São Paulo, SP, Brazil )
                0104-4230
                1806-9282
                2003
                : 49
                : 4
                : 434-438
                Article
                S0104-42302003000400037 S0104-4230(03)04900437
                10.1590/S0104-42302003000400037
                78a9e43f-9c57-4efc-b8fa-8e660c3c2367

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 24 April 2003
                : 03 January 2003
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 17, Pages: 5
                Product

                SciELO Brazil

                Categories
                Artigo Original

                Immunopathogenesis,IgG,IgE,IgA,Candida albicans,Vulvovaginal Candidiasis,Imunopatogênese,IgG4,IgG1,Candidíase vulvovaginal

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