title: Comparison of serum hepatitis C virus RNA concentration by branched DNA probe assay with competitive reverse transcription polymerase chain reaction as a predictor of response to interferon-alpha therapy in chronic hepatitis C patients.
abstract: A study was carried out to assess the correlation between the serum concentration of hepatitis C virus RNA (HCV-RNA) in patients with chronic hepatitis, as measured by competitive reverse transcription polymerase chain reaction (cRT-PCR) and branched DNA probe assay (bDNA), and response to interferon-alpha (IFN alpha) therapy. The serum HCV-RNA concentration was evaluated by both cRT-PCR and bDNA in 54 patients who had received a total dose of 480 MU of IFN alpha. HCV subtypes were also identified in all patients. The measurement of serum HCV-RNA concentration by bDNA correlated significantly with that of cRT-PCR. The concentration of HCV-RNA in subtype 1 patients was significantly higher than that in subtype 2 patients when measured by bDNA, but not when measured by cRT-PCR. The correlation of HCV-RNA concentration between bDNA and cRT-PCR was associated with both subtypes 1 and 2. The difference in serum HCV-RNA concentration between complete and incomplete responders was more significant when measured by bDNA probe assay than by cRT-PCR. Moreover, only 1 of 26 patients with a HCV-RNA concentration of more than 1 x 10(6) eq/ml as measured by bDNA probe assay attained a complete response, while 19 of 28 patients with that of less than 1 x 10(6) eq/ml achieved it. Measurement of serum HCV-RNA concentration by bDNA probe assay was a better predictor of clinical response of IFN alpha therapy than measurement by cRT-PCR.
authors.affiliation: Department of Gastroenterology, Ogaki Municipal Hospital, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Toyoda
authors.forename: S
authors.initials: S
authors.lastname: Nakano
authors.forename: T
authors.initials: T
authors.lastname: Kumada
authors.forename: I
authors.initials: I
authors.lastname: Takeda
authors.forename: K
authors.initials: K
authors.lastname: Sugiyama
authors.forename: T
authors.initials: T
authors.lastname: Osada
authors.forename: S
authors.initials: S
authors.lastname: Kiriyama
authors.forename: E
authors.initials: E
authors.lastname: Orito
authors.forename: M
authors.initials: M
authors.lastname: Mizokami
mesh_terms: D000328:Adult; D000368:Aged; D015342:DNA Probes; D004279:DNA, Viral / Q000097:blood*; D005260:Female; D016174:Hepacivirus / Q000235:genetics / Q000302:isolation & purification*; D006526:Hepatitis C / Q000097:blood / Q000188:drug therapy* / Q000821:virology; D006521:Hepatitis, Chronic / Q000097:blood / Q000188:drug therapy* / Q000821:virology; D006801:Humans; D016898:Interferon-alpha / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D012367:RNA, Viral / Q000097:blood*; D014158:Transcription, Genetic
chemical_list: D015342:DNA Probes; D004279:DNA, Viral; D016898:Interferon-alpha; D012367:RNA, Viral