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      Glomerulonefrite associada à infecção pelo vírus da hepatiteC Translated title: Glomerulonephritis associated with hepatitis C virus infection

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          Abstract

          Descrevem-se pacientes com glomerulonefrites (GNs) associadas à infecção pelo vírus da hepatite C (HCV). Entre agosto de 93 e julho de 96 foram observados 4 pacientes, com idade mediana de 41 anos, sendo 2 do sexo masculino. Pesquisaram-se o anti-HCV por ensaio imuno-enzimático e o HCV-RNA por PCR. Também foram pesquisadas crioglobulinas séricas, hemácias dismórficas no sedimento urinário e proteinúria de 24h. Viremia, crioglobulinas, hematúria e proteinúria foram observadas nos 4 pacientes. As biópsias hepáticas revelaram atividade inflamatória nos 3 pacientes em que foram realizadas e as do rim revelaram glomerulonefrite membranoproliferativa em 3 e glomerulonefrite proliferativa mesangial em 1 paciente. Dois pacientes vêm recebendo antivirais (IFN associado à ribavirina) e evoluindo com melhora. A presença de viremia e de hepatite concomitante com as alterações urinárias constituem indícios do envolvimento viral na glomerulopatia. Tais achados são reforçados pela melhora das alterações urinárias durante o tratamento específico. Conclui-se que a pesquisa de marcadores virais em pacientes com GNs assume relevância na medida em que pode modificar a conduta terapêutica.

          Translated abstract

          We report 4 patients with glomerulonephritis (GN) associated with hepatitis C virus (HCV) infection seen between August 1993 and July 1996. Two of them were male and median age was 41 years. Anti-HCV was detected by enzyme-immunoassay and HCV-RNA by PCR. Serum cryoglobulins, 24-hour proteinuria, and erythrocyte dismorphism were also determined. Viremia, cryoglobulinemia, hematuria and proteinuria were observed in all patients. Liver biopsies revealed inflammatory activity in 3 cases, and renal biopsies revealed membranoproliferative glomerulonephritis in 3 patients and mesangial proliferative glomerulonephritis in 1 patient. Two patients are on specific therapy for HCV infection (IFN in combination with ribavirin) and have presented clinical and laboratory improvement. The occurrence of active liver disease and viremia concurrent with urinary alterations suggests viral involvement in renal disease, a conclusion supported by the by improvement of urinary alterations observed after treatment for HCV. We conclude that the search for viral markers in patients with GN is important since their detection could change the therapeutic approach.

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          Hepatitis C Virus Infection and Membranous Glomerulonephritis

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            Hepatitis C virus-associated glomerulonephritis. Effect of α-interferon therapy

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              Hepatitis B virus associated membranous glomerulonephritis.

              The incidence of persistent hepatitis B surface (HBs) antigenaemia was studied in 114 nephrotic children with glomerulonephritis. Twenty five (24 boys) of 28 cases of membranous glomerulonephritis were HBs antigen (HBsAg) carriers. Only 9 of the remaining 86 patients with nephropathies other than membranous glomerulonephritis were HBsAg positive. HBsAg immune complexes were seen in the sera by electron microscopy. On radioimmunoassay both HBsAg and antibody (anti-HBs), and HBeAg and antibody (anti-HBe) were often detected concurrently, HBsAg was not shown in the glomerular capillary wall. HBs antigenaemia persisted in 80% of patients after recovery from glomerulonephritis but remission of the proteinuria correlated well, although not fully, with seroconversion to anti-HBe. The natural history of hepatitis B virus (HBV) associated glomerulonephritis in childhood is one of slow recovery. A few patients are left with mild asymptomatic proteinuria but progressive renal failure is rare. The 14% incidence of membranous glomerulonephritis in nephrotic children in this area is much higher than that found by the international study of kidney disease in children in well developed countries and is probably related to a high HBV carrier rate. A search for HBV markers should be included in the investigation of persistent glomerulonephritis, particularly in countries with a high prevalence of HBV carriers.
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                Author and article information

                Contributors
                Role: ND
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                Journal
                rsbmt
                Revista da Sociedade Brasileira de Medicina Tropical
                Rev. Soc. Bras. Med. Trop.
                Sociedade Brasileira de Medicina Tropical - SBMT (Uberaba )
                1678-9849
                February 1999
                : 32
                : 1
                : 1-6
                Article
                S0037-86821999000100001
                10.1590/S0037-86821999000100001
                fb3385ba-46cf-4ccc-b549-b0ee8117e983

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0037-8682&lng=en
                Categories
                TROPICAL MEDICINE

                Infectious disease & Microbiology
                Glomerulonephritis,Hepatitis C virus,Cryoglobulinemia,Hepatitis,Glomerulonefrite,Vírus da hepatite C,Crioglobulinemia,Hepatite

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