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J Med Virol. 2016 Jun 30. doi: 10.1002/jmv.24616. [Epub ahead of print]
Durability of the virological response after lamivudine discontinuation in lamivudine-resistant patients with a complete virological response after lamivudine and adefovir combination therapy.Kim MN1, Park JY2,3,4, Ahn SH2,3,4, Kim BK2,3,4, Kim SU2,3,4, Kim DY2,3,4, Han KH2,3,4.
Author information
- 1Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
- 2Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
- 3Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea.
- 4Yonsei Liver Center, Yonsei University Health System, Seoul, Korea.
AbstractWe investigated the durability of virological response after lamivudine (LAM) discontinuation in LAM-resistant chronic hepatitis B (CHB) patients with complete virological response after LAM-adefovir (ADV) combination therapy. We enrolled 58 patients switched to ADV monotherapy with undetectable viral loads (< 12 IU/ml) and normal alanine aminotransferase levels after ADV add-on combination treatment for at least 6 months in LAM-resistant CHB patients. Virologic relapse was defined as HBV DNA detection at more than 20 IU/ml by quantitative polymerase chain reaction determined on two consecutive measurements. During median 40.9 months of follow-up (range 11.5-79.0 months), 7 (12.1%) patients experienced virologic relapse. The cumulative rate of virologic relapse at 3 and 5 years was 5.5% and 22.4%, respectively. Two patients had elevated alanine aminotransferase during virologic relapse. These 7 patients with virologic relapse had undetectable HBV DNA after switching to tenofovir therapy. In our study, switching to ADV monotherapy resulted in sustained HBV DNA suppression in 87.9% of the patients during median 40.9 months follow-up. This adapting step-down strategy, switching from combination therapy to monotherapy in virologically suppressed CHB patients with stable liver disease, may reduce the cost burden and the risk of potentially harmful effects of combination therapy. This article is protected by copyright. All rights reserved.
This article is protected by copyright. All rights reserved.
KEYWORDS: Antiviral agents; Hepatitis B virus; Resistance.DR
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