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      Anticardiolipin Antibodies in Acute Poststreptococcal Glomerulonephritis and Streptococcal Impetigo

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          Abstract

          Anticardiolipin (aCL) antibodies have been described in diverse clinical situations, linked to the risk of thrombosis in different vascular locations. They have been rarely studied in renal diseases, and occasionally they have been associated with glomerular thrombosis. We analyzed the incidence of aCL (isotypes IgG, IgA, and IgM) in samples, taken during the acute phase of the disease, from 27 well-documented patients having acute poststreptococcal glomerulonephritis. Twelve cases were positive on IgG testing, 1 case on IgA testing only, and no one was positive on IgM testing. A serological follow-up was performed with a second sample taken about 7 months later, for the patients initially positive on IgG testing showing persistence in 9. Clinical variables during the acute phase and after a follow-up period of 25 (range 6–89) months were analyzed for possible associations with the presence of these antibodies, but non was significantly related. Renal histopathological investigation did not reveal particular findings in the aCL-positive patients, and glomerular thrombosis was not found in any case. In addition, serum samples from 12 streptococcal impetigo patients without renal involvement were analyzed, showing similar incidence (4 positive on IgG testing, 1 of them positive on IgM testing as well, and no one positive on IgA testing) and titers of aCL antibodies. We conclude that the presence of aCL antibodies in acute poststreptococcal glomerulonephritis may be a marginal immunological phenomenon unrelated to the glomerular disease, triggered by the streptococcal infection.

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          Anticardiolipin Antibodies in Classic Pediatric Hemolytic-Uremic Syndrome: A Possible Pathogenic Role

          Anticardiolipin (aCL) antibodies have been associated with thrombocytopenia, hemolytic anemia and an increased risk of thrombosis in different vascular locations, even in the absence of lupus. The classic hemolytic-uremic syndrome is a postinfectious acute renal failure characterized by hemolytic anemia, thrombocytopenia and the presence of widespread glomerular thrombosis in the kidney, with pathogenic mechanisms that remain to be identified. In order to establish the frequency of aCL antibodies in this syndrome and to identify a possible role in the pathogenesis and clinical manifestations, 17 patients were studied during the reactant phase of the disease looking for an association between the presence of aCL antibodies (isotypes IgG, IgA and IgM) and the main clinical variables of the syndrome. In 8 patients IgG aCL was present, 2 patients had IgM aCL, and 1 had IgA antibodies on the solid-phase ELISA aCL assays, but no association could be demonstrated with the clinical variables studied. Although it might correspond to an epiphenomenon related to the triggering intestinal infection, a pathogenic role cannot be discarded and additional studies should be performed.
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            Author and article information

            Journal
            NEF
            Nephron
            10.1159/issn.1660-8151
            Nephron
            S. Karger AG
            1660-8151
            2235-3186
            1999
            September 1999
            31 August 1999
            : 83
            : 1
            : 47-52
            Affiliations
            Division of Nephrology, Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile
            Article
            45472 Nephron 1999;83:47–52
            10.1159/000045472
            10461035
            c47db648-101d-48e5-b110-bb1c1a1a6103
            © 1999 S. Karger AG, Basel

            Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

            History
            Page count
            Figures: 4, Tables: 3, References: 27, Pages: 6
            Categories
            Original Paper

            Cardiovascular Medicine,Nephrology
            Poststreptococcal glomerulonephritis,Anticardiolipin,Autoantibodies,Impetigo,Glomerular thrombosis

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