HCV T Cell Escape Mutations and Viral Fitness
Author Information
Author(s): Uebelhoer Luke, Han Jin-Hwan, Callendret Benoit, Mateu Guaniri, Shoukry Naglaa H., Hanson Holly L., Rice Charles M., Walker Christopher M., Grakoui Arash
Primary Institution: Emory University School of Medicine
Hypothesis
How do mutations in the hepatitis C virus (HCV) affect its ability to evade the immune response and maintain viral fitness?
Conclusion
HCV escape mutants that emerge early in infection are not necessarily stable but are eventually replaced by variants that balance immune evasion and replication fitness.
Supporting Evidence
- HCV escape mutants can evade immune responses but may have reduced replication fitness.
- Mutations in the NS31629–1637 epitope were shown to affect T cell recognition.
- Certain HCV variants can persist long-term by balancing immune evasion and replication efficiency.
Takeaway
The study shows that hepatitis C virus can change to avoid being attacked by the immune system, but some changes make it harder for the virus to reproduce.
Methodology
The study used an HCV subgenomic replicon system and an in vitro infectious virus cell culture model to assess the effects of mutations on viral fitness and T cell responses.
Limitations
The study primarily focused on a single chimpanzee model, which may not fully represent human HCV infection dynamics.
Participant Demographics
The study involved a single chimpanzee (CH503) infected with HCV.
Digital Object Identifier (DOI)
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