Lamivudine plus adefovir or entecavir for patients with chronic hepatitis B resistant to lamivudine and adefovir

Journal of Hepatology
Nae-Yun HeoDong Jin Suh

Abstract

Little is known about the optimal management of patients with chronic hepatitis B (CHB) who developed multiple-drug resistance. We assessed 91 patients with compensated CHB who developed adefovir-resistant mutations during adefovir monotherapy for lamivudine-resistant CHB. Of these, 41 were treated with a combination of lamivudine plus adefovir (LAM+ADV group) and 50 were treated with entecavir monotherapy (ETV group). There were no significant differences between the two groups in baseline characteristics, including serum HBV DNA levels (p>0.05). The rate of virologic non-response (HBV DNA reduction <1 log(10) IU/ml at 6 months) was significantly greater in the LAM+ADV than in the ETV group (51.2% vs. 16.0%, p<0.01). At 12 months, HBV DNA declined less in the LAM+ADV than in the ETV group (-1.49+/-1.78 vs. -3.47+/-2.13 log(10) IU/ml, p<0.01). Only 12.2% and 22.0% of patients in the LAM+ADV and ETV groups, respectively, achieved complete virologic response (HBV DNA <60 IU/ml) at 12 months. Multivariable analysis showed that LAM+ADV group (OR=0.08, CI=0.02-0.28) and the presence of the rtA181V/T mutation (OR=0.21, CI=0.05-0.91) were independently associated with a decreased rate of virologic response (HBV DNA <2000 IU/ml) at 12 ...Continue Reading

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