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Pubmed ID :28815296
Publication Date : //

Autoantibodies against "rods and rings"-related IMPDH2 in hepatitis C genotype 1 and DAA therapy in a "real life" cohort.


Autoantibodies against inosine-5'-monophosphate-dehydrogenase-2 (IMPDH2; "rods and rings" pattern) develop in chronic hepatitis C (CHC) patients under treatment with peg-interferon (IFN) and ribavirin (RBV), an inhibitor of IMPDH2. We investigated the influence of the alternative therapy with direct-acting antivirals (DAA)/ribavirin on anti-IMPDH2 autoantibody generation and the use of anti-IMPDH2 development as a marker for therapy outcome (sustained virologic response, SVR). We analyzed a "real life" cohort of 104 unselected CHC genotype 1 (GT1) patients treated with IFN/first-generation DAA/RBV prospectively compared to a historic cohort of 59 IFN/RBV-treated CHC GT1 patients. First-generation DAA were boceprevir (BOC) or telaprevir (TPR). Serum autoantibodies were tested by indirect immunofluorescence (IFA) using recombinant IMPDH2 expressing HEK293 cells and native HEp2-cells as substrates. 64/163 (39%) CHC patients turned anti-IMPDH2 positive during therapy, but only 43/163 (26%) showed also "rods and rings" structures. 99/163 (61%) were tested as anti-IMPDH2 negative. 53/104 (51%) CHC patients undergoing IFN/DAA/RBV therapy were anti-IMPDH2 positive and 38/104 (37%) were in parallel anti-"rods and rings" positive. HCV clearance/SVR rate after IFN/DAA/RBV therapy and anti-IMPDH2 status were not significantly dependent. CHC GT1 patients treated with IFN/first-generation DAA/RBV developed anti-IMPDH2 autoantibodies comparable to previous studies including patients under IFN/RBV therapy. Anti-IMPDH2 titers show no use as a marker for therapy outcome in CHC GT1 patients.

Authors : Dammermann Werner , Polywka Susanne , Dettmann Inga , Mindorf Swantje , Komorowski Lars , Wehmeyer Malte , Schulze Zur Wiesch Julian , Stöcker Winfried , Lüth Stefan ,

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