Efficacy and safety of long-term adefovir dipivoxil therapy in children with chronic hepatitis B infection
| Autor: | Franck Rousseau, Elsa Mondou, Jeff Sorbel, Maureen M. Jonas, Henry Pollack, J. Mizerski, Etienne Sokal, Deirdre Kelly, David W. Frederick |
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| Rok vydání: | 2012 |
| Předmět: |
Microbiology (medical)
Male endocrine system medicine.medical_specialty Hepatitis B virus Adolescent animal diseases viruses Organophosphonates Viral resistance Placebos Hepatitis B Chronic Chronic hepatitis Double-Blind Method Internal medicine Drug Resistance Viral Adefovir Medicine Humans Child business.industry Adenine virus diseases Virology Hepatitis B Core Antigens Infectious Diseases Treatment Outcome Virologic response Child Preschool Pediatrics Perinatology and Child Health DNA Viral Female business medicine.drug Follow-Up Studies |
| Zdroj: | The Pediatric infectious disease journal. 31(6) |
| ISSN: | 1532-0987 |
| Popis: | The safety and efficacy of adefovir dipivoxil (ADV) for chronic hepatitis B infection in children was demonstrated in a randomized, placebo-controlled trial. Those children were followed for 4 more years, and many continued to receive ADV for all or part of this time.To examine the therapeutic effects and safety of prolonged ADV therapy in children with chronic hepatitis B infection.After 48 weeks of double-blind treatment, all placebo-treated subjects who did not exhibit HBeAg seroconversion at week 44, and all ADV-treated subjects, were offered open-label ADV for up to 192 additional weeks. Treatment was discontinued if there was no virologic effect, except for adolescents with previous lamivudine exposure, in whom lamivudine was added to ADV. Durability of HBeAg seroconversion was assessed. Annual resistance surveillance was conducted in subjects who had detectable hepatitis B virus DNA.Of the 170 subjects who completed the 48-week study, 162 participated in the open-label study. ADV was discontinued in 61 subjects due to virologic failure. In subjects who continued treatment, either as monotherapy or with lamivudine, continued viral suppression and alanine aminotransferase normalization were noted. HBeAg seroconversions were observed in 55 subjects, and hepatitis B surface antigen seroconversion in 5. Mean duration of HBeAg seroconversion at last observation was 762 ± 371.2 days in the ADV-ADV group and 643 ± 291.5 days in the PLB-ADV group. ADV was safe and well-tolerated. Resistance to ADV was observed in 1 child on ADV monotherapy. Nine treatment-experienced subjects entered the study with mutations associated with lamivudine resistance. All responded to ADV therapy.Prolonged ADV treatment is safe in children. If reserved only for those with virologic response within 6 months, viral resistance was minimal. |
| Databáze: | OpenAIRE |
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