title: A 5-year prospective study of the late resolution of chronic hepatitis C after antiviral therapy.
abstract: BACKGROUND
  Persistence of hepatitis C virus (HCV) in serum is assured after any course of antiviral therapy that failed to obtain a sustained virological response.
  
  
  OBJECTIVE
  To evaluate the long-term effect on serum HCV-RNA of a course of pegylated-interferon and ribavirin therapy that was unable to obtain sustained response.
  
  
  METHODS
  Serum HCV-RNA was determined at monthly intervals in 68 non-responders, breakthroughs or relapsers and in 52 naïve controls enrolled in a five-year study.
  
  
  RESULTS
  Five genotype 2 or 3 patients (one non-responder, three breakthroughs, one relapser) cleared HCV-RNA after the end of therapy or relapse, and remained negative until the end of follow-up. HCV-RNA clearance rate in genotype 2 and 3 non-responders, breakthroughs or relapsers was higher than in controls with the same genotypes (22.7% vs. 0%; log-rank 9.62; P < 0.002). HCV-RNA at the end of treatment or at relapse was <10(5) IU/mL in the five subjects who cleared the virus and <10(4) IU/mL in four of them. None of genotype 1 or 4 subjects cleared HCV-RNA during follow-up.
  
  
  CONCLUSIONS
  Late resolution of HCV infection is possible in genotype 2 or 3 patients with low viral load at the end of therapy or at relapse. In these subjects, HCV-RNA monitoring is advisable during the first year after therapy.
authors: Istituto di Patologia Medica, Facoltà di Medicina e Chirurgia, Università Cattolica del Sacro Cuore, Rome, Italy.
authors: B E
authors: BE
authors: Annicchiarico
authors: M
authors: M
authors: Siciliano
authors: A W
authors: AW
authors: Avolio
authors: R L
authors: RL
authors: Grillo
authors: G
authors: G
authors: Bombardieri
mesh_terms: D000328:Adult; D000368:Aged; D000998:Antiviral Agents / Q000627:therapeutic use*; D016022:Case-Control Studies; D004359:Drug Therapy, Combination; D005260:Female; D016174:Hepacivirus / Q000235:genetics / Q000302:isolation & purification; D019698:Hepatitis C, Chronic / Q000097:blood / Q000150:complications* / Q000188:drug therapy; D006801:Humans; D007371:Interferon-gamma / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012367:RNA, Viral / Q000097:blood; D012008:Recurrence; D012254:Ribavirin / Q000627:therapeutic use*; D016896:Treatment Outcome
chemical_list: D000998:Antiviral Agents; D012367:RNA, Viral; D012254:Ribavirin; D007371:Interferon-gamma