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J Med Virol. 2017 Oct 27. doi: 10.1002/jmv.24986. [Epub ahead of print]
Switching from Tenofovir and Nucleoside Analogue Therapy to Tenofovir Monotherapy in Virologically Suppressed Chronic Hepatitis B Patients with Antiviral Resistance.Kim DY1,2, Lee HW1,3, Song JE1,3, Kim BK1,3, Kim SU1,3, Kim DY1,3, Ahn SH1,3, Han KH1,3, Park JY1,3.
Author information
1Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea.2Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea.3Yonsei Liver Center, Severance Hospital, Seoul Korea.
AbstractBACKGROUND/AIMS: It is unclear whether chronic hepatitis B (CHB) patients with antiviral resistance, who achieve a complete virologic response (CVR) with tenofovir disoproxil fumarate (TDF) and nucleoside analogue (NUC) combination therapy, maintain CVR if switched to TDF monotherapy. We investigated the persistence of CVR after cessation of NUC in virologically suppressed antiviral resistant CHB patients using TDF + NUC combination therapy.
METHODS: This study recruited 76 antiviral resistant CHB patients showing CVR on TDF + entecavir (ETV) (n = 52), TDF + lamivudine (LAM; n = 14) and TDF + telbivudine (LdT; n = 10) combination therapy, who were switched to TDF monotherapy as step-down therapy.
RESULTS: At baseline, 47 patients were male and the median age was 53.0 years (range: 30-78 years); 72.3% cases were hepatitis B e antigen-positive (HBeAg+) and 23.7% were of liver cirrhosis. The median duration of TDF + NUC combination therapy was 20.8 months (range: 3-46 months). At a median follow-up of 24.7 months (range: 12-48 months) after switching to TDF monotherapy, all 76 patients maintained CVR, regardless of the duration of combination therapy and the type of prior NUC and antiviral resistance. Renal dysfunction was not observed during the treatment period.
CONCLUSIONS: The step-down strategy of switching from TDF + NUC combination therapy to TDF monotherapy in virologically suppressed CHB patients with antiviral resistance should be considered. This article is protected by copyright. All rights reserved.
This article is protected by copyright. All rights reserved.
KEYWORDS: Chronic hepatitis B; Drug resistance; Hepatitis B virus; Step-down therapy; Tenofovir
PMID:29077211DOI:10.1002/jmv.24986
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