title: [Therapy of chronic viral hepatitis type B in children after previous ineffective interferon-alpha treatment].
abstract: THE AIM of this study was to estimate the efficacy of nucleoside analogue (lamivudine) in the therapy of chronic viral hepatitis type B in children, after previous, ineffective treatment with interferon-alpha.
  
  
  METHODS
  we analyzed 53 children with chronic viral hepatitis type B, who had not responded to Interferon-alpha treatment conducted 1-7,5 years before this study (mean 4,0 +/- 7,5; median 4 years). Inclusive criteria to re-therapy with lamivudine were as follows: increased serum alanine aminotransferase activity, detected at least three times during 6 months before treatment, HBsAg and HBeAg present in the blood, viral HBV DNA detected for at least 6 months before the beginning of lamivudine therapy (above 200 genome copies per mL) and inflammation activity observed in liver biopsy specimen (biopsy performed within previous 24 months). Evaluation of side-effects of lamivudine therapy was based on anamnesis (subjective data) and laboratory tests performed regularly in the time of clinical visits during and after the end of the treatment.
  
  
  RESULTS
  all the children concluded the treatment. Before lamivudine therapy, serum alanine aminotransferase activity ranged between 20-590 IU/L. In 28,4% of children it was less than 100 IU/L. In almost all the children moderate staging and grading were observed in liver biopsy specimens. HBV DNA in serum ranged between 200-200000 copies/mL: in 31 children (58,4%) HBV DNA exceeded 200000 copies/mL, in 5 (28,3%) was between 10000 and 200000 copies/mL, and in 7 (13,2% ) was below 10000 copies/mL. Applied treatment resulted in alanine aminotransferase activity normalization in 79,2% of children, mostly after 2-11 months (mean 3,9 +/- 2,7; median 3,8 months). HBeAg/HBeAb seroconversion was achieved in 28,3% of children, usually at the end of lamivudine therapy (approximately after 12 months). Sustained viral response was observed in 24,5% of treated children. There were no undesirable effects of therapy noted. Serum alanine aminotransferase activity increased slightly and temporarily in 4 children between 3rd and 12th month of therapy. In 2 of these children YMDD mutation was detected.
  
  
  CONCLUSIONS
  lamivudine is effective, safe and well tolerated in treatment of chronic viral hepatitis type B, following unsuccessful interferon-alpha therapy. Serum alanine aminotransferase activity normalized in most of the patients. HBeAg/HBeAb seroconversion as well as positive viral response is mostly connected with low level of HBV DNA before therapy.
authors.affiliation: Katedra i Klinika Pediatrii, Gastroenterologii i Onkologii Dzieciecej Akademii Medycznej w Gdańsku. alib@amg.gda.pl
authors.forename: Anna
authors.initials: A
authors.lastname: Liberek
authors.forename: Anna
authors.initials: A
authors.lastname: Szaflarska-Popławska
authors.forename: Grazyna
authors.initials: G
authors.lastname: Łuczak
authors.forename: Magdalena
authors.initials: M
authors.lastname: Góra-Gebka
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Jankowska
authors.forename: Ewa
authors.initials: E
authors.lastname: Łoś-Rycharskda
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Szlagatys-Sidorkiewicz
authors.forename: Grazyna
authors.initials: G
authors.lastname: Sikorska-Wiśniewska
authors.forename: Wanda
authors.initials: W
authors.lastname: Bako
authors.forename: Maciej
authors.initials: M
authors.lastname: Zagierski
authors.forename: Mieczysława
authors.initials: M
authors.lastname: Czerwionka-Szaflarska
authors.forename: Maria
authors.initials: M
authors.lastname: Korzon
mesh_terms: D000293:Adolescent; D000998:Antiviral Agents / Q000008:administration & dosage*; D002648:Child; D004359:Drug Therapy, Combination; D005260:Female; D019694:Hepatitis B, Chronic / Q000188:drug therapy*; D006801:Humans; D016898:Interferon-alpha / Q000008:administration & dosage*; D019259:Lamivudine / Q000008:administration & dosage*; D008297:Male; D017211:Treatment Failure; D016896:Treatment Outcome
chemical_list: D000998:Antiviral Agents; D016898:Interferon-alpha; D019259:Lamivudine