A comparison of clevudine and entecavir for treatment-naive patients with chronic hepatitis B: results after 2 years of treatment
Hepatology International,  Clinical Article

Gwak GY et al. – Entecavir (ETV) was associated with a significantly higher virological response rate than clevudine (CLV) at 2 years. ETV was superior to CLV in terms of the drug resistance profile and the development of clinical myopathy. Further studies to see whether the unique characteristic of CLV to reduce HBsAg titer is associated with the removal of ccc–DNA from hepatocytes and the remission of the disease are needed.

Methods
  • One hundred and eight Korean patients from the prior 48-week study were followed with continuous therapy for up to 2 years and monitored for hepatitis B virus (HBV) DNA levels, HBeAg seroconversion, serum ALT, emergence of drug-resistant mutant HBV, and drug-related adverse events.

Results
  • A complete virological response during the 2-year treatment period occurred in 68.0 % in the CLV group and in 84.5 % in the ETV group (p=0.043).
  • The cumulative percentage of patients with sustained virological responses at 2 years was 54.0 and 77.6 % in the CLV and ETV group, respectively (p=0.010).
  • Virological breakthrough occurred in 12 patients in the CLV group; however, there were none in the ETV group (p<0.001).
  • HBeAg seroconversion rates were not different between the two groups.
  • In patients who maintained sustained virological responses at 2 years, the mean reduction in HBsAg titer was -0.24 and -0.06 log IU/ml in the CLV and ETV group, respectively (p>0.05).
  • Clinical myopathy occurred in seven patients in the CLV group; however, this was not observed in the ETV group (p=0.004).

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