CD4+ T-cell Responses in Chronic Hepatitis C Infection
Author Information
Author(s): Vicki M. Fleming, Gillian Harcourt, Eleanor Barnes, Paul Klenerman
Primary Institution: Nuffield Department of Clinical Medicine, University of Oxford
Hypothesis
What is the specificity and virological footprint of CD4+ T cells in chronic hepatitis C virus infection?
Conclusion
Sustained CD4+ T-cell responses can be measured during chronic hepatitis C infection, but their overall virological impact is limited.
Supporting Evidence
- 53% of individuals showed CD4+ T-cell responses targeting multiple peptides in the HCV core.
- Viral sequence evaluation revealed that CD4+ T-cell responses were associated with mutants in 2 out of 21 individuals.
- Responses were reproducible and robust, indicating that CD4+ T-cell responses may have been underestimated in chronic infection.
Takeaway
The study found that many people with chronic hepatitis C have CD4+ T cells that respond to the virus, but these responses don't always help fight the infection.
Methodology
The study analyzed CD4+ T-cell responses in CD8+ T-cell-depleted peripheral blood mononuclear cells from 61 HCV genotype 1-infected patients using an IFN-γ ELISPOT assay.
Potential Biases
Potential bias due to the exclusion of patients who had received treatment within the last 12 months.
Limitations
The study may underestimate the total antiviral CD4+ T-cell response due to the use of overlapping peptides and the focus on a specific region of the virus.
Participant Demographics
Participants were 61 patients with chronic genotype 1 HCV infection from the Hepatitis Clinic at the John Radcliffe Hospital, Oxford, UK.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website