title: Efficacy of interferon in immunocompromised HCV patients after liver transplantation or with HIV co-infection.
abstract: BACKGROUND
  Interferon (IFN)-based antiviral therapy is increasingly used in immunocompromised patients with chronic hepatitis C after orthotopic liver transplantation (OLT) and HIV-HCV co-infection. Differences in early viral kinetics have not been compared in these patients.
  
  
  METHODS
  We retrospectively analysed 76 patients (31 OLT, 20 HIV-HCV and 25 HCV control patients) undergoing IFN sensitivity testing before starting antiviral therapy with pegylated IFN-alpha 2a (180 microg week(-1)) plus ribavirin (0.8-1.2 g day(-1)) for 48 weeks. We compared baseline parameters, response to IFN and treatment outcome between the groups and assessed the influence of specific calcineurin inhibitors in OLT patients and immune status in HIV-HCV patients on treatment response.
  
  
  RESULTS
  Viral loads pretherapy were higher in OLT compared to nontransplanted HCV controls (P = 0.003). The same trend was present in HIV-HCV (P = 0.09). The log-drop after test dose was less in OLT compared to HCV (P = 0.02), while no significant difference was found between HIV-HCV and HCV. In HIV-HCV patients viral load log-drop correlated significantly with CD4(+) cell counts (P = 0.001). No difference in viral load pretherapy, log-drop and treatment outcome was noted between different calcineurin inhibitors in OLT patients. Sustained virological response rates were 28% in OLT, 50% in HIV-HCV and 56% in HCV patients.
  
  
  CONCLUSIONS
  Immunosuppression results in high HCV viral loads. Initial efficacy of IFN is significantly impaired in OLT patients, but not in HIV-HCV with largely preserved CD4(+) cell counts. Sustained virological response rates of 28% in OLT patients are suboptimal, but encouraging results are shown for HIV-HCV patients with relatively high CD4(+) cell counts.
authors.affiliation: Department of Gastroenterology & Hepatology, University of Vienna, Vienna, Austria.
authors.forename: T
authors.initials: T
authors.lastname: Reiberger
authors.forename: S
authors.initials: S
authors.lastname: Rasoul-Rockenschaub
authors.forename: A
authors.initials: A
authors.lastname: Rieger
authors.forename: P
authors.initials: P
authors.lastname: Ferenci
authors.forename: A
authors.initials: A
authors.lastname: Gangl
authors.forename: M
authors.initials: M
authors.lastname: Peck-Radosavljevic
mesh_terms: D000328:Adult; D000368:Aged; D000998:Antiviral Agents / Q000627:therapeutic use*; D018791:CD4 Lymphocyte Count; D065095:Calcineurin Inhibitors; D016572:Cyclosporine / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D005260:Female; D015658:HIV Infections / Q000188:drug therapy / Q000276:immunology; D016174:Hepacivirus; D019698:Hepatitis C, Chronic / Q000188:drug therapy* / Q000276:immunology; D006801:Humans; D016867:Immunocompromised Host; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000627:therapeutic use*; D016031:Liver Transplantation; D008297:Male; D008875:Middle Aged; D011092:Polyethylene Glycols / Q000627:therapeutic use*; D011379:Prognosis; D011994:Recombinant Proteins; D012189:Retrospective Studies; D012254:Ribavirin / Q000627:therapeutic use; D018709:Statistics, Nonparametric; D016559:Tacrolimus / Q000627:therapeutic use; D016896:Treatment Outcome; D019562:Viral Load
chemical_list: D000998:Antiviral Agents; D065095:Calcineurin Inhibitors; D000077190:Interferon alpha-2; D016898:Interferon-alpha; D011994:Recombinant Proteins; D011092:Polyethylene Glycols; D012254:Ribavirin; D016572:Cyclosporine; C100416:peginterferon alfa-2a; D016559:Tacrolimus