Linked Life Data

10622558

Source:http://linkedlifedata.com/resource/pubmed/id/10622558

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pubmed-article:10622558pubmed:dateCreated2000-1-19lld:pubmed
pubmed-article:10622558pubmed:abstractTextHepatitis C virus (HCV) infection is associated with various extrahepatic manifestations: mixed cryoglobulinaemia, membranoproliferative glomerulonephritis and, in southern Europe, to some extent with porphyria cutanea tarda. The association of haplotype HLA B-8 and DR-3 mixed cryoglobulinaemia and HCV infection has recently been demonstrated. Interferon alpha therapy decreases hepatitis C viraemia and improves the clinical signs and biochemical abnormalities of cryoglobulinaemia. There seems to be a south-north gradient in the prevalence of HCV-associated cryoglobulinaemia. The rare combination of hepatitis C and panarteritis nodosa has still not been confirmed. The sicca syndrome also seems to be associated with hepatitis C virus, but this is not the typical Sjögren syndrome. Existing studies have not answered the question of whether HCV plays a pathogenic role in the development of thyroid dysfunction and autoimmune thyroiditis. There seems to be a genetic predisposition for the manifestations of thyroid disease in the case of hepatitis C infection and interferon therapy. This predominantly affects women with haplotype HLA DR-3. Before beginning interferon therapy, these patients often show thyroid autoantibodies against the thyroid peroxidase and/or thyroglobulin. It is still unclear whether the rare combination of hepatitis C with aplastic anaemia and lymphoma has pathogenic aspects. These haematological manifestations are thought to be induced by the infection of haematopoietic cells with the hepatitis C virus. In rare cases, a stimulated HCV-induced interferon gamma synthesis by haematopoietic stem cells has been shown. Although an epidemiological association of hepatitis C with lichen planus, neuropathies and other diseases has been observed, the aetiological role and the pathogenic involvement of the hepatitis C infection remains unclear. Furthermore, the question of whether these extrahepatic diseases are autoimmune has not been clarified. On the other hand, a number of autoantibodies may be observed during the course of hepatitis C. Of particular interest are liver/kidney microsomal antibodies (LKM). Their occurrence in viral hepatitis may indicate an increased risk for treatment with interferons. In the clinical setting, the presence of these diseases should suggest hepatitis C infection and hepatitis C antibodies should be tested and, if positive, hepatitis C-RNA is indicated. If there is any evidence of an aetiological association of replicative hepatitis C infection and the above-mentioned extrahepatic diseases, antiviral treatment should be considered.lld:pubmed
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pubmed-article:10622558pubmed:statusMEDLINElld:pubmed
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pubmed-article:10622558pubmed:authorpubmed-author:MannoM LMLlld:pubmed
pubmed-article:10622558pubmed:authorpubmed-author:RambuschE GEGlld:pubmed
pubmed-article:10622558pubmed:issnTypePrintlld:pubmed
pubmed-article:10622558pubmed:volume31 Suppl 1lld:pubmed
pubmed-article:10622558pubmed:ownerNLMlld:pubmed
pubmed-article:10622558pubmed:authorsCompleteYlld:pubmed
pubmed-article:10622558pubmed:pagination39-42lld:pubmed
pubmed-article:10622558pubmed:dateRevised2005-11-16lld:pubmed
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pubmed-article:10622558pubmed:year1999lld:pubmed
pubmed-article:10622558pubmed:articleTitleAutoimmunity and extrahepatic manifestations in hepatitis C virus infection.lld:pubmed
pubmed-article:10622558pubmed:affiliationDept. of Gastroenterology and Hepatology, Medizinische Hochschule Hannover, Germany. manns.michael@mh-hannover.delld:pubmed
pubmed-article:10622558pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10622558pubmed:publicationTypeReviewlld:pubmed
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