HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

Detection of hepatitis C virus antibody in the absence of viral RNA in patients with autoimmune hepatitis.

AbstractOBJECTIVE:
To determine whether laboratory findings showing antibodies to hepatitis C virus (HCV) in patients with autoimmune hepatitis represent false-positive results and to identify possible explanations for true-positive results in these patients.
DESIGN:
Cross-sectional.
SETTING:
University-based hospital.
PATIENTS:
Fifty-two patients with non-A, non-B chronic hepatitis as a control group and 26 patients with classic chronic active autoimmune hepatitis.
MEASUREMENTS:
Comparison of the results of five kinds of assays of HCV antibodies and HCV RNA.
MAIN RESULTS:
Of 52 patients with non-A, non-B chronic hepatitis, HCV antibodies (anti-HCV) were detected in 42 patients (81%; 95% CI, 67% to 90%) by a first-generation enzyme-linked immunosorbent assay (ELISA-I), in 39 patients (75%) by Sp42 ELISA, in 37 patients (71%) by RIA-I, in 49 patients (94%) by ELISA-II, and in 48 patients (92%) by RIBA-II. We found HCV RNA in 47 patients (90%; CI, 79% to 97%). Of the 26 patients with autoimmune hepatitis, anti-HCV were detected in 23 patients (88%; CI, 70% to 98%) by ELISA-I, in 12 (46%) by both RIA-I and Sp42 ELISA, in 20 (77%) by ELISA-II, and in 9 (35%) by RIBA-II. However, HCV RNA was found in only five of these patients (19%; CI, 7% to 39%). None of our patients, including controls, had antibodies to superoxide dismutase. Of the 21 patients who had autoimmune hepatitis that was completely responsive to steroid therapy, 18 had anti-HCV by ELISA-I, but 13 of these patients had negative results by RIBA-II, and only two patients had HCV RNA. Of the five patients who did not respond to steroid treatment, all had anti-HCV by ELISA-I, four had negative results by RIBA-II, and three had HCV RNA.
CONCLUSIONS:
Testing for HCV antibodies in patients with autoimmune hepatitis frequently elicits positive results when the ELISA-I or ELISA-II tests are used. Most of these appear to represent false-positive results because HCV RNA is usually absent from the serum. Such false positivity may result from previous infection with HCV or from cross-reaction of an epitope of HCV. Other patients with apparent autoimmune hepatitis who fail to respond to corticosteroid therapy may actually have chronic hepatitis C (or other non-A, non-B hepatitis) infection.
AuthorsS Nishiguchi, T Kuroki, T Ueda, K Fukuda, T Takeda, S Nakajima, S Shiomi, K Kobayashi, S Otani, N Hayashi
JournalAnnals of internal medicine (Ann Intern Med) Vol. 116 Issue 1 Pg. 21-5 (Jan 01 1992) ISSN: 0003-4819 [Print] United States
PMID1309200 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Hepatitis Antibodies
  • RNA, Viral
  • Reagent Kits, Diagnostic
Topics
  • Adult
  • Aged
  • Autoimmune Diseases (immunology, microbiology)
  • Base Sequence
  • Cross-Sectional Studies
  • Enzyme-Linked Immunosorbent Assay (methods)
  • False Positive Reactions
  • Female
  • Hepacivirus (genetics, immunology, isolation & purification)
  • Hepatitis (immunology, microbiology)
  • Hepatitis Antibodies (blood)
  • Hepatitis C (immunology)
  • Humans
  • Immunoblotting (methods)
  • Male
  • Middle Aged
  • Molecular Sequence Data
  • RNA, Viral (blood)
  • Radioimmunoassay
  • Reagent Kits, Diagnostic
  • Sensitivity and Specificity

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: