Abstract
Purpose: To estimate the viral suppressive effect of entecavir monotherapy in Korean children and adolescents with lamivudine-resistant chronic hepatitis B (CHB). Methods: One milligram of entecavir was administered once daily to 6 patients (4 boys; mean age, 17.5 years; range, 15.10∼24.6 years) with lamivudine-resistant CHB for a mean duration of therapy of 13.4 months (range, 1∼21.1 months). The therapeutic results were compared with 11 patients who received adefovir (0.3 mg/kg/day [maximal dose 10 mg]) for at least 12 months (mean, 33.4 months; range, 12.4∼ 58.3 months). The serum HBV DNA level and serologic markers were measured every 2 months. Results: The interval to a HBV DNA titer decrement (>1 log10) was 1.2±0.2 and 4.4±5.2 months (p=0.185) for the entecavir and adefovir groups, respectively. The interval to a HBV DNA titer decrement (>2 log10) was 2.4±2.3 and 9.2±7.3 months (p=0.025), for the entecavir and adefovir groups, respectively. Conclusion: The therapeutic efficacy of entecavir was favorable in children and adolescents, especially in shortening the interval to a >2 log10 decrement in the HBV DNA titer. Long-term follow up is needed to determine the therapeutic efficacy of entecavir for lamivudine-resistant CHB in children and adolescents. (Korean J Pediatr Gastroenterol Nutr 2010; 13: 44∼50)
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