title: [Results of 3 years of continuous entecavir treatment in nucleos(t)ide-naive chronic hepatitis B patients].
abstract: OBJECTIVE
  To evaluate the virological, serological and biochemical outcomes of 3 years of entecavir (ETV) treatment in nucleoside-naive chronic hepatitis B patients.
  
  
  METHODS
  This study was divided into two stages: Patients receiving either ETV 0.5 mg/d (n = 258) or lamivudine (LAM) 100 mg/d (n = 261) entered the initial 96-week randomized, double blind, controlled efficacy study. Patients not achieving a consolidated response (HBV DNA less than 0.7 MEq/ml, ALT less than 1.25 times*ULN, and if HBeAg-positive at baseline, loss of HBeAg for >or= 24 weeks), or those experienced viral breakthrough or relapse, entered a 48-week entecavir rollover study.
  
  
  RESULTS
  96 weeks after the treatment, 79% of ETV treated and 46% of LAM treated patients had HBV DNA less than 300 copies/ml (P < 0.0001), 96% of ETV treated and 92% of LAM treated patients had normalized ALT (P = 0.06). 21% of ETV treated and 23% of LAM treated patients achieved HBeAg seroconversion. Among the 160 patients received continuous ETV for 144 weeks, 89% had undetectable serum HBV DNA, 86% showed ALT normalization, and 27% achieved HBeAg seroconversion. ETV resistance was rare: only 3 patients showed ETV resistance 96 weeks after the treatment, and additional 2 patients developed ETV resistance during the following 48 weeks, genotyping indicated the ETV resistance was caused by gene mutation. Adverse event rates in ETV-treated patients were similar to those in LAM-treated patients, but fewer ALT flares were observed in ETV-treated patients.
  
  
  CONCLUSIONS
  This study demonstrates that ETV treatment results in long-term HBV suppression and ALT normalization in Chinese CHB patients, and is associated with low rate of drug resistance.
authors.affiliation: Clinical Immunology Research Center, Department of Gastroenterology and Hepatology, Shanghai Jing'anqu Central Hospital, Shanghai 200040, China. yaogb@yahoo.com.cn
authors.forename: Guang-bi
authors.initials: GB
authors.lastname: Yao
authors.forename: Hong
authors.initials: H
authors.lastname: Ren
authors.forename: Dao-zhen
authors.initials: DZ
authors.lastname: Xu
authors.forename: Xia-qiu
authors.initials: XQ
authors.lastname: Zhou
authors.forename: Ji-dong
authors.initials: JD
authors.lastname: Jia
authors.forename: Yu-ming
authors.initials: YM
authors.lastname: Wang
authors.forename: Cheng-wei
authors.initials: CW
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000410:Alanine Transaminase / Q000097:blood; D000998:Antiviral Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D004279:DNA, Viral / Q000097:blood*; D004311:Double-Blind Method; D024882:Drug Resistance, Viral; D005260:Female; D006147:Guanine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use; D006513:Hepatitis B e Antigens / Q000097:blood; D019694:Hepatitis B, Chronic / Q000097:blood / Q000188:drug therapy* / Q000821:virology; D006801:Humans; D019259:Lamivudine / Q000008:administration & dosage / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D013997:Time Factors; D016896:Treatment Outcome; D019562:Viral Load; D055815:Young Adult
chemical_list: D000998:Antiviral Agents; D004279:DNA, Viral; D006513:Hepatitis B e Antigens; D019259:Lamivudine; C413685:entecavir; D006147:Guanine; D000410:Alanine Transaminase