title: Peginterferon-alpha-2a (40KD) and ribavirin for 16 or 24 weeks in patients with genotype 2 or 3 chronic hepatitis C.
abstract: OBJECTIVE
  Standard therapy of patients with chronic hepatitis C virus (HCV) infected with HCV genotype-2 or -3 is the combination of pegylated interferon-alpha and ribavirin for 24 weeks. Whether shorter treatment durations are possible for these patients without compromising sustained virologic response rates is unknown.
  
  
  METHODS
  Patients chronically infected with HCV-2 (n = 39), HCV-2/3 (n = 1), or HCV-3 (n = 113) were treated with peginterferon-alpha-2a (180 microg/wk) plus ribavirin 800-1200 mg/day. HCV RNA was quantitatively assessed after 4 weeks. Patients with a rapid virologic response (HCV RNA below 600 IU/mL) were randomized for a total treatment duration of 16 (group A) or 24 weeks (group B). All patients with HCV RNA > or =600 IU/mL at week 4 (group C) were treated for 24 weeks. End-of-treatment and sustained virologic response were assessed by qualitative RT-PCR (sensitivity 50 IU/mL).
  
  
  RESULTS
  Only 11 of 153 patients (7%) were allocated to group C. End-of-treatment and sustained virologic response rates were 94% and 82%, (group A), 85% and 80% (group B), and 73% and 36% (group C), respectively. In patients infected with genotype HCV-3 and high viral load (>800,000 IU/mL), a significant lower sustained virologic response rate was found than in patients infected with HCV-3 and a viral load lower or equal to 800,000 IU/mL (59% vs 85%, respectively; P = .003).
  
  
  CONCLUSIONS
  In HCV-2 and -3 (low viral load)-infected patients who have a rapid virologic response, treatment for 16 weeks with peginterferon-alpha-2a and ribavirin is sufficient. In patients infected by HCV-3 (high viral load), longer treatment may be necessary.
authors.affiliation: Universitätsklinikum des Saarlandes, Homburg/Saar, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: von Wagner
authors.forename: Miriam
authors.initials: M
authors.lastname: Huber
authors.forename: Thomas
authors.initials: T
authors.lastname: Berg
authors.forename: Holger
authors.initials: H
authors.lastname: Hinrichsen
authors.forename: Jens
authors.initials: J
authors.lastname: Rasenack
authors.forename: Tobias
authors.initials: T
authors.lastname: Heintges
authors.forename: Alexandra
authors.initials: A
authors.lastname: Bergk
authors.forename: Christine
authors.initials: C
authors.lastname: Bernsmeier
authors.forename: Dieter
authors.initials: D
authors.lastname: Häussinger
authors.forename: Eva
authors.initials: E
authors.lastname: Herrmann
authors.forename: Stefan
authors.initials: S
authors.lastname: Zeuzem
mesh_terms: D000328:Adult; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D005260:Female; D005500:Follow-Up Studies; D005838:Genotype; D016174:Hepacivirus / Q000187:drug effects / Q000235:genetics*; D019698:Hepatitis C, Chronic / Q000175:diagnosis / Q000188:drug therapy* / Q000235:genetics*; D006801:Humans; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000008:administration & dosage*; D008111:Liver Function Tests; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D011092:Polyethylene Glycols / Q000008:administration & dosage*; D011336:Probability; D012367:RNA, Viral / Q000235:genetics; D011994:Recombinant Proteins; D012016:Reference Values; D012254:Ribavirin / Q000008:administration & dosage*; D018570:Risk Assessment; D012720:Severity of Illness Index; D016896:Treatment Outcome; D019562:Viral Load
chemical_list: D000077190:Interferon alpha-2; D016898:Interferon-alpha; D012367:RNA, Viral; D011994:Recombinant Proteins; D011092:Polyethylene Glycols; D012254:Ribavirin; C100416:peginterferon alfa-2a