title: [Efficacy of adefovir dipivoxil was not related to genotypes B and C of hepatitis B virus: a randomized, double-blind, multicenter clinical study].
abstract: OBJECTIVE
  To determine the relationship between the response to adefovir dipivoxil (ADV) treatment in patients with HBV genotypes B and C of HBeAg positive chronic hepatitis B.
  
  
  METHODS
  This clinical trial was a randomized, double-blind, placebo-controlled, multicenter study. A total of 226 eligible patients with HBeAg positive chronic hepatitis B were randomized (in a ratio of 2:1) receiving ADV 10 mg/d for 48 weeks (ADV+ADV group) or placebo for 24 weeks followed by ADV 10 mg/d for 24 weeks (PLB+ADV group). The primary efficacy was virologic response. The genotypes of HBV were determined by PCR-restricted fragment length polymorphism (RFLP) method using serum samples before therapy. rtN236T and rtA181V mutations were confirmed by sequencing.
  
  
  RESULTS
  In this study, HBV genotype C was 66.7%, genotype B was 25.2%. Genotype B was more common in Guangzhou. Patients with genotype B were much younger than those with the genotype C. Patients with genotype B previously received less anti-HBV therapy. There were no significant difference in virological response (including mean reduction in HBV DNA level from baseline, serum HBV DNA load after treatment and HBV DNA undetectable rate) and serological response (the rate of HBeAg loss and HBeAg seroconversion) between patients infected with genotypes B and C in both treatment arms.
  
  
  CONCLUSIONS
  There were no significant difference in virological and serological response to ADV therapy between patients infected with HBV genotype B and C.
authors.affiliation: Department of Infectious Diseases, Peking University First Hospital, Beijing, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhao
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Yue-Xin
authors.initials: YX
authors.lastname: Zhang
authors.forename: Xin-Yue
authors.initials: XY
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Tang
authors.forename: Chun-Liang
authors.initials: CL
authors.lastname: Lei
authors.forename: Chong-Wen
authors.initials: CW
authors.lastname: Si
mesh_terms: D000225:Adenine / Q000031:analogs & derivatives* / Q000627:therapeutic use; D000293:Adolescent; D000328:Adult; D000998:Antiviral Agents / Q000627:therapeutic use; D004279:DNA, Viral / Q000097:blood / Q000235:genetics; D004311:Double-Blind Method; D005260:Female; D005838:Genotype; D006510:Hepatitis B Antibodies / Q000097:blood; D006513:Hepatitis B e Antigens / Q000276:immunology; D006515:Hepatitis B virus / Q000187:drug effects* / Q000235:genetics / Q000276:immunology; D019694:Hepatitis B, Chronic / Q000097:blood / Q000188:drug therapy* / Q000821:virology; D006801:Humans; D008297:Male; D008875:Middle Aged; D063065:Organophosphonates / Q000627:therapeutic use*; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D000998:Antiviral Agents; D004279:DNA, Viral; D006510:Hepatitis B Antibodies; D006513:Hepatitis B e Antigens; D063065:Organophosphonates; D000225:Adenine; C106812:adefovir dipivoxil