title: Detection of HCV RNA in the peripheral blood mononuclear cells of serum HCV RNA-negative Egyptian patients under interferon treatment.
abstract: BACKGROUND
  Despite recent success after the introduction of combination therapy with interferon (IFN)-α and ribavirin, approximately 60% of patients with hepatitis C virus (HCV) genotype 4 fail to respond. Resistance to antiviral therapy remains a serious problem in the management of chronic hepatitis C. In most patients, HCV RNA could be detected in peripheral blood mononuclear cell (PBMC).
  
  
  OBJECTIVE
  The authors aimed to investigate the predictive value of HCV RNA in PBMC of patients with chronic hepatitis C after IFN treatment, which may act as the source of HCV reinfection of hepatic cells.
  
  
  METHODS
  Seventy patients with chronic hepatitis C were treated with IFN plus ribavirin for 48 weeks; they all achieved clearance of HCV RNA from serum. At the end of treatment, PBMC and serum were examined by real-time polymerase chain reaction for detection of HCV RNA. Six months later, HCV RNA in serum was monitored to detect sustained virologic response.
  
  
  RESULTS
  : Analysis revealed the presence of detectable HCV RNA in the PBMC of 27% of patients despite clearance of serum HCV RNA. During follow-up, 80% of the patients who became serum HCV positive 6 months after the end of treatment had detectable level of HCV RNA in PBMC at the end of treatment.
  
  
  CONCLUSIONS
  The absence of HCV in the serum of patients by the end of treatment does not exclude future viremia. The patient might still be a source of infection to others. It is strongly encouraged to test for HCV in PBMC to detect lack of response to treatment and persisting infection.
authors.affiliation: Departments of Clinical Pathology, Kasr Al-Aini School of Medicine, Cairo University, Cairo, Egypt.
authors.forename: Rania A
authors.initials: RA
authors.lastname: Zayed
authors.forename: Eman
authors.initials: E
authors.lastname: Rushdy
authors.forename: Doa'a A
authors.initials: DA
authors.lastname: Saleh
mesh_terms: D000328:Adult; D005260:Female; D016174:Hepacivirus / Q000145:classification / Q000302:isolation & purification*; D019698:Hepatitis C, Chronic / Q000188:drug therapy* / Q000821:virology; D006801:Humans; D016898:Interferon-alpha / Q000627:therapeutic use*; D007963:Leukocytes, Mononuclear / Q000821:virology*; D008297:Male; D008875:Middle Aged; D012367:RNA, Viral / Q000097:blood*
chemical_list: D016898:Interferon-alpha; D012367:RNA, Viral