title: Clinical significance of SEN-virus on interferon response in chronic hepatitis C patients.
abstract: OBJECTIVE
  A novel virus, SEN-virus (SENV), was recently discovered. It has been reported as a candidate for a non-A-E hepatitis virus. However, much is still unknown about the clinical significance of SENV. The aim of the present study was to clarify the clinical significance of SENV in patients coinfected with SENV and hepatitis C virus (HCV).
  
  
  METHODS
  The 52 subjects had chronic hepatitis C and had undergone interferon (IFN) therapy. SEN virus DNA was investigated by using polymerase chain reaction with SENV-specific primers, which we designed to detect all strains of SENV. Additionally, SENV-D and -H were detected by consensus primers.
  
  
  RESULTS
  Thirty-five patients were SENV-DNA positive and 22 patients were SENV-D- or -H-positive before IFN therapy. After IFN therapy, in the HCV-RNA eradication group, all cases normalized their serum alanine aminotransferase (ALT). However, in the no eradication group, the ALT no-response rate was 68.7%. In contrast, in the SENV eradication group, the ALT no-response rate was 51.9%, and in the no eradication group, it was 37.5%. Also, in the SENV-D and -H eradication group, the ALT no-response rate was 54.5%, and in the no eradication group, it was 36.4%. The changes in ALT after IFN therapy were significantly correlated with the changes in HCV RNA, but no correlation was found with the SENV DNA presence.
  
  
  CONCLUSIONS
  Hepatocellular injury in patients with chronic hepatitis who are coinfected with HCV and SENV appears to primarily be caused by HCV, and is less attributable to SENV.
authors.affiliation: First Department of Internal Medicine, Akita University School of Medicine, Akita, Japan.
authors.forename: Jiun-Guey
authors.initials: JG
authors.lastname: Lin
authors.forename: Takashi
authors.initials: T
authors.lastname: Goto
authors.forename: Kunio
authors.initials: K
authors.lastname: Nakane
authors.forename: Kouichi
authors.initials: K
authors.lastname: Miura
authors.forename: Ken-ichiro
authors.initials: K
authors.lastname: Mikami
authors.forename: Shigetoshi
authors.initials: S
authors.lastname: Ohshima
authors.forename: Kazuo
authors.initials: K
authors.lastname: Yoneyama
authors.forename: Sumio
authors.initials: S
authors.lastname: Watanabe
mesh_terms: D000410:Alanine Transaminase / Q000097:blood; D000998:Antiviral Agents / Q000627:therapeutic use*; D004266:DNA Virus Infections / Q000150:complications*; D004279:DNA, Viral / Q000032:analysis; D005260:Female; D016174:Hepacivirus / Q000302:isolation & purification; D006512:Hepatitis B Core Antigens / Q000032:analysis; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D019698:Hepatitis C, Chronic / Q000150:complications / Q000175:diagnosis / Q000188:drug therapy* / Q000821:virology; D006801:Humans; D007370:Interferon Type I / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D012367:RNA, Viral / Q000032:analysis; D011994:Recombinant Proteins; D022783:Torque teno virus / Q000302:isolation & purification
chemical_list: D000998:Antiviral Agents; D004279:DNA, Viral; D006512:Hepatitis B Core Antigens; D006514:Hepatitis B Surface Antigens; D007370:Interferon Type I; D012367:RNA, Viral; D011994:Recombinant Proteins; D000410:Alanine Transaminase