title: Response-guided therapy for chronic hepatitis C virus infection in patients coinfected with HIV: a pilot trial.
abstract: BACKGROUND
  To study the feasibility of a response-guided therapy for chronic hepatitis C virus (HCV) infection in patients coinfected with human immunodeficiency virus (HIV) in a tertiary care hospital.
  
  
  METHODS
  Treatment duration was individualized on the basis of week 4 and week 12 virologic response. Sixty patients were enrolled and received pegylated interferon alfa-2b (1.5 microg/kg per week) plus weight-based ribavirin (800-1400 mg/day). Patients who achieved a rapid virologic response, defined as viral load <50 IU/mL at treatment week 4, completed 24 weeks of therapy. Patients who did not achieve a rapid virologic response were reassessed at treatment week 12. Patients with a complete early virologic response, defined as an HCV RNA level <600 IU/mL, were treated for 48 weeks. Patients with a partial response, defined as a decrease in the viral load > or = 2 log10 and an HCV RNA level > or = 600 IU/mL, who attained an undetectable viral load at week 24 were treated for 60 weeks. The primary efficacy end point was sustained virologic response, defined as HCV RNA <50 IU/mL, 24 weeks after the end of treatment.
  
  
  RESULTS
  Overall, 33 (55%) of 60 patients achieved a sustained virologic response: 11 (44%) of 25 patients with HCV genotype 1, 3 (27%) of 11 patients with genotype 4, and 19 (79%) of 24 patients with genotype 3. One-third of patients showed a rapid virologic response. Of patients with genotype 1, there was a rapid virologic response in 4 (16%) of 25; with genotype 4, in 1 (9%) of 11; and with genotype 3, in 14 (58%) of 24. Of the 19 patients with a rapid virologic response, 17 (89.5%) eradicated the virus after 24 weeks of therapy. The rate of sustained virologic response was significantly higher among patients with genotype 3 and low pretreatment HCV RNA levels. A high relapse rate (46%) after 48 weeks of therapy occurred among patients infected with genotypes 1 or 4 who first achieved undetectable viral load at treatment week 12.
  
  
  CONCLUSIONS
  A response-guide therapy is feasible and may be useful to optimize the individual outcome of HCV treatment in patients coinfected with HIV.
authors.affiliation: Infectious Diseases Department, Vall d'Hebron Hospital, Autonomous University of Barcelona, Spain.
authors.forename: Eva
authors.initials: E
authors.lastname: Van den Eynde
authors.forename: Manuel
authors.initials: M
authors.lastname: Crespo
authors.forename: Juan I
authors.initials: JI
authors.lastname: Esteban
authors.forename: Rosend
authors.initials: R
authors.lastname: Jardi
authors.forename: Esteban
authors.initials: E
authors.lastname: Ribera
authors.forename: Judit
authors.initials: J
authors.lastname: Carbonell
authors.forename: Francisco
authors.initials: F
authors.lastname: Rodríguez-Frias
authors.forename: Vicenç
authors.initials: V
authors.lastname: Falco
authors.forename: Adrià
authors.initials: A
authors.lastname: Curran
authors.forename: Arkaitz
authors.initials: A
authors.lastname: Imaz
authors.forename: Sara
authors.initials: S
authors.lastname: Villar del Saz
authors.forename: Inma
authors.initials: I
authors.lastname: Ocaña
authors.forename: Rafael
authors.initials: R
authors.lastname: Esteban
authors.forename: Albert
authors.initials: A
authors.lastname: Pahissa
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D000998:Antiviral Agents / Q000009:adverse effects / Q000627:therapeutic use*; D016009:Chi-Square Distribution; D005260:Female; D005838:Genotype; D015658:HIV Infections / Q000150:complications*; D016174:Hepacivirus / Q000187:drug effects* / Q000235:genetics / Q000302:isolation & purification; D019698:Hepatitis C, Chronic / Q000150:complications* / Q000188:drug therapy* / Q000821:virology; D006761:Hospitals; D006801:Humans; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000009:adverse effects / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011092:Polyethylene Glycols / Q000009:adverse effects / Q000627:therapeutic use; D012367:RNA, Viral / Q000097:blood; D011994:Recombinant Proteins; D012254:Ribavirin / Q000009:adverse effects / Q000627:therapeutic use; D018709:Statistics, Nonparametric; D016896:Treatment Outcome; D019562:Viral Load
chemical_list: D000998:Antiviral Agents; D000077190:Interferon alpha-2; D016898:Interferon-alpha; D012367:RNA, Viral; D011994:Recombinant Proteins; D011092:Polyethylene Glycols; D012254:Ribavirin; C417083:peginterferon alfa-2b