ArticleDigestive diseases and sciences2018
Persistence of Circulating Hepatitis C Virus Antigens-Specific Immune Complexes in Patients with Resolved HCV Infection.
Article in Digestive diseases and sciences, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundOur recent study indicated the possible presence of detectable hepatitis C virus antigens (HCV-Ags) after denaturation of sera with resolved HCV (R-HCV) infection. The present study determined and characterized persistent HCV-Ags-specific immune complexes (ICs) in these patients.
methodsSixty-eight sera with R-HCV and 34 with viremic HCV (V-HCV) infection were tested for free and IC-bound HCV-Ags using HCV-Ags enzyme immunoassay (EIA), the presence of HCV-Ags-specific ICs by immunoprecipitation and Western blot (IP-WB), HCV ICs containing HCV virions using IP and HCV RNA RT-PCR, and correlation of HCV ICs with clinical presentation in these patients.
resultsUsing HCV-Ags EIA, we found 57.4% of sera with R-HCV infection were tested positive for bound, but not free HCV-Ags. Using pooled or individual anti-HCV E1/E2, cAg, NS3, NS4b, and/or NS5a to precipitate HCV-specific-Ags, we confirmed persistent HCV-Ags ICs specific to various HCV structural and non-structural proteins not only in V-HCV infection, but also in R-HCV infection. Using IP and HCV RNA PCR, we then confirmed the presence of HCV virions within circulating ICs in V-HCV, but not in R-HCV sera. Multivariable analysis indicated significant and independent associations of persistent circulating HCV-Ags-specific ICs with both age and the presence of cirrhosis in patients with R-HCV infection.
conclusionsVarious HCV-Ag-specific ICs, but not virions, persist in 57.4% of patients who had spontaneous or treatment-induced HCV clearance for 6 months to 20 years. These findings enriched our knowledge on HCV pathogenesis and support further study on its long-term clinical relevance, such as extrahepatic manifestation, transfusion medicine, and hepatocarcinogenesis.
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