HIV-1 CD8+ T-Cell Responses and Disease Progression in Infected Adolescents
Author Information
Author(s): Elizabeth R. Sharp, Christian B. Willberg, Peter J. Kuebler, Jacob Abadi, Glenn J. Fennelly, Joanna Dobroszycki, Andew A. Wiznia, Michael G. Rosenberg, Douglas F. Nixon
Primary Institution: University of California San Francisco
Hypothesis
Differences in the pattern of immunodomination of HIV-1 specific CD8+ T cell responses could partially explain differences in disease progression rate.
Conclusion
The region of HIV-1-Gag targeted by CD8+ T cells may be more important to the rate of disease progression than the qualitative features of these T cells.
Supporting Evidence
- Subjects with no immune suppression had a higher frequency of naïve CD8+ T cells compared to those with severe immune suppression.
- Responses to specific Gag peptides were more frequent in subjects with better disease outcomes.
- Immunodominant responses were primarily restricted by HLA-B*57 and B*42 alleles.
Takeaway
This study looked at how the immune response to HIV in teenagers affects how quickly the disease gets worse. It found that which part of the virus the immune system targets is really important.
Methodology
The study mapped and quantified CD8+ T cell responses against HIV-1 Gag peptides in 58 vertically infected adolescents, categorizing them based on their CD4% levels.
Potential Biases
The study's findings may be influenced by the heterogeneous treatment adherence levels among subjects.
Limitations
The small sample size limits the generalizability of the findings, and the subjects were not all receiving the same treatment regimen.
Participant Demographics
Participants were adolescents with vertically acquired HIV-1, with a mean age of 14.3 years, including a mix of African American and Hispanic individuals.
Statistical Information
P-Value
0.0066
Confidence Interval
(27.1; 34.8)
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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