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Updated: Jul 26, 2026
11:14
Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection
Published on: November 7, 2018
GB virus B as a model for hepatitis C virus
B Beames1, D Chavez, R E Lanford
1Department of Virology and Immunology, Southwest Foundation for Biomedical Research and Southwest Regional Primate Research Center, San Antonio, Texas, USA.
ILAR Journal
|June 15, 2001
Summary
GB virus B (GBV-B) in tamarins shows promise as a hepatitis C virus (HCV) surrogate model. Its similarities to HCV, including protease activity, aid in developing antiviral therapies for HCV infections.
Area of Science:
- Virology
- Hepatitis Research
- Flaviviridae Family
Background:
- GB viruses A and B (GBV-A, GBV-B) are Flaviviridae members.
- GBV-B is phylogenetically close to Hepatitis C Virus (HCV).
- GBV-C/HGV is another related human virus.
Purpose of the Study:
- Evaluate GBV-B as a surrogate model for HCV infection studies.
- Investigate similarities and differences between GBV-B and HCV.
- Assess GBV-B's utility in antiviral drug screening for HCV.
Main Methods:
- Phylogenetic analysis to determine viral relatedness.
- Induction of hepatitis in tamarins using GBV-B.
- Biochemical assays of protease activity.
- Comparative sequence analysis of GBV-B and HCV.
Main Results:
- GBV-B causes acute, self-resolving hepatitis in tamarins.
- GBV-B shares 28% amino acid homology with HCV.
- GBV-B NS3 protease cleaves HCV polyprotein substrates.
- HCV causes chronic infections, while GBV-B causes acute infections.
Conclusions:
- GBV-B serves as a valuable surrogate model for HCV research.
- Shared protease specificities enable testing of HCV antivirals.
- Differences in infection chronicity highlight key areas for further study.
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