Tenofovir Disoproxil Fumarate (Tenofovir DF) Versus Emtricitabine/Tenofovir DF in Subjects Resistant to Lamivudine

Summary

The aim of therapy for the treatment of chronic hepatitis B virus (HBV) is to maintain suppression of viral replication to prevent the emergence of complications, which requires long-term therapy. Durable suppression of viral replication is achieved in the treatment of chronic viral diseases by preventing of the emergence of drug-resistant mutations. The clinical guidelines for the management of lamivudine resistant patients are variable. Some recommend switching to another agent without cross-resistance, while others recommend adding on another agent without cross-resistance. Limited clinical data exists to demonstrate whether tenofovir disoproxil fumarate (tenofovir DF; TDF) is an effective monotherapy for lamivudine resistant patients or if it should be used as part of a combination therapy regimen. This study is designed to evaluate the effectiveness, safety, and tolerability of tenofovir DF monotherapy versus emtricitabine (FTC)/tenofovir DF combination therapy in participants with chronic HBV with lamivudine resistance (presence of the rtM204I/V mutation with or without the rtL180M mutation) over a 240-week period. Participants in this study must be receiving lamivudine treatment at the time of enrollment.

Timeline

Start

2008-09

Primary completion

2011-11

Completion

2015-02

Publications

• Results Corsa AC, Liu Y, Flaherty JF, Mitchell B, Fung SK, Gane E, Miller MD, Kitrinos KM. No resistance to tenofovir disoproxil fumarate through 96 weeks of treatment in patients with lamivudine-resistant chronic hepatitis B. Clin Gastroenterol Hepatol. 2014 Dec;12(12):2106-12.e1. doi: 10.1016/j.cgh.2014.05.024. Epub 2014 Jun 11.
• Results Liu Y, Fung S, Gane EJ, Dinh P, Flaherty JF, Svarovskaia ES, Miller MD, Kitrinos KM. Evaluation of HBV DNA decay kinetics in patients containing both rtM204V/I mutant and wild-type HBV subpopulations during tenofovir DF (TDF) monotherapy or combination therapy with emtricitabine (FTC)/TDF. J Med Virol. 2014 Sep;86(9):1473-81. doi: 10.1002/jmv.23982. Epub 2014 May 23.
• Results Fung S, Kwan P, Fabri M, Horban A, Pelemis M, Hann HW, Gurel S, Caruntu FA, Flaherty JF, Massetto B, Dinh P, Corsa A, Subramanian GM, McHutchison JG, Husa P, Gane E. Randomized comparison of tenofovir disoproxil fumarate vs emtricitabine and tenofovir disoproxil fumarate in patients with lamivudine-resistant chronic hepatitis B. Gastroenterology. 2014 Apr;146(4):980-8. doi: 10.1053/j.gastro.2013.12.028. Epub 2013 Dec 22.
• Fung S, Kwan P, Fabri M, Horban A, Pelemis M, Hann HW, Gurel S, Caruntu FA, Flaherty JF, Massetto B, Kim K, Kitrinos KM, Subramanian GM, McHutchison JG, Yee LJ, Elkhashab M, Berg T, Sporea I, Yurdaydin C, Husa P, Jablkowski MS, Gane E. Tenofovir disoproxil fumarate (TDF) vs. emtricitabine (FTC)/TDF in lamivudine resistant hepatitis B: A 5-year randomised study. J Hepatol. 2017 Jan;66(1):11-18. doi: 10.1016/j.jhep.2016.08.008. Epub 2016 Aug 18.

Drugs

Indications