HIV-1-Specific CD8+ T-Cell Responses in Rectal Mucosa during Chronic Infection
Author Information
Author(s): Critchfield J. William, Young Delandy H., Hayes Timothy L., Braun Jerome V., Garcia Juan C., Pollard Richard B., Shacklett Barbara L.
Primary Institution: University of California Davis
Hypothesis
The functionality of rectal HIV-specific CD8+ T-cells is related to clinical status and antiretroviral therapy.
Conclusion
Rectal Gag-specific CD8+ T-cells are associated with blood CD4 count and inversely related to plasma viral load.
Supporting Evidence
- Rectal CD8+ T-cell responses were more robust compared to peripheral blood in patients not on ART.
- Polyfunctional CD8+ T-cells correlated positively with blood CD4 count and negatively with plasma viral load.
- ART was associated with a significant decrease in the magnitude and complexity of rectal CD8+ T-cell responses.
Takeaway
This study shows that special immune cells in the rectum can help fight HIV, and their strength depends on how healthy the person is.
Methodology
The study analyzed paired blood and rectal biopsies from HIV-infected patients to evaluate CD8+ T-cell responses to HIVgag stimulation.
Potential Biases
Potential biases may arise from the variability in cell numbers and background levels in mucosal samples.
Limitations
The study's cross-sectional design limits the ability to establish causality between T-cell responses and clinical status.
Participant Demographics
Participants included 15 HIV-positive individuals not on ART, 13 on ART, and 8 seronegative volunteers, primarily Caucasian and African American.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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