Abstract
Little clinical data are available regarding re-establishing the effective inhibition of entecavir (ETV)-resistant mutants. In this retrospective study, we aimed to compare the efficacies of four treatment regimens as rescue therapy for those chronic hepatitis B (CHB) patients with ETV resistance. A total of 65 patients with ETV resistance were assigned either with tenofovir disoproxil fumarate (TDF) monotherapy (n = 21), ETV (0.5 mg) plus adefovir (ADV) combination therapy (n = 19), ETV (1.0 mg) monotherapy (n = 11) or ETV (0.5 mg) plus TDF combination therapy (n = 14). The efficacy and safety of four treatment regimens were compared. There were no significant differences among the four study groups in baseline characteristics, including HBV DNA levels (χ2 = 0.749, P = 0.862) and hepatitis B e antigen-positivity (χ2 = 0.099, P = 0.992). The median reduction in serum HBV DNA level from baseline at week 48 was -2.37 ± 1.07 log10 IU ml-1 , -2.16 ± 0.81 log10 IU ml-1 , -1.17 ± 1.23 log10 IU ml-1 and -2.49 ± 1.10 log10 IU ml-1 , respectively (F = 4.078, P = 0.011). The TDF group and ETV (0.5 mg) + TDF group have the highest undetectable HBV DNA rate (76.19% vs. 78.57%) compared to the ETV (0.5 mg) + ADV group and the ETV (1.0 mg)...Continue Reading
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