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Updated: May 11, 2026
09:27
New Tools to Expand Regulatory T Cells from HIV-1-infected Individuals
Published on: May 30, 2013
Vaccine-induced CD8+ T cells control AIDS virus replication.
Philip A Mudd1, Mauricio A Martins, Adam J Ericsen
1Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53711, USA.
Nature
|October 2, 2012
Summary
Vaccine development for human immunodeficiency virus (HIV) can be advanced by studying elite controllers. This study shows that targeted CD8(+) T-cell responses can control simian immunodeficiency virus (SIV) replication in macaques.
Area of Science:
- Immunology
- Virology
- Vaccinology
Background:
- Some individuals naturally control human immunodeficiency virus (HIV) replication, termed elite controllers.
- Elite control is strongly associated with specific human leukocyte antigen (HLA) alleles, such as HLA-B*27.
- The precise mechanisms underlying this viral control are not fully understood.
Purpose of the Study:
- To investigate if narrowly targeted CD8(+) T-cell responses can control simian immunodeficiency virus (SIV) replication.
- To explore the role of Mamu-B*08, an animal model for HLA-B*27, in viral control.
Main Methods:
- Indian rhesus macaques expressing Mamu-B*08 were vaccinated with three Mamu-B*08-restricted CD8(+) T-cell epitopes.
- Viral replication of the pathogenic SIVmac239 was monitored.
- Frequencies of CD8(+) T cells targeting Vif and Nef epitopes were quantified in blood, lymph nodes, and colon.
- Viral load and epitope escape mutations were analyzed.
Main Results:
- Vaccinated macaques demonstrated control over SIV replication.
- High frequencies of CD8(+) T cells targeting Vif and Nef epitopes correlated with viral control.
- A specific Nef epitope response (RL10) correlated with reduced acute viremia.
- Loss of viral control in two animals coincided with viral escape mutations in targeted epitopes.
Conclusions:
- Vaccine-induced, virus-specific CD8(+) T-cell responses targeting key epitopes can effectively control SIV replication.
- This finding supports the potential for targeted T-cell-based vaccines against HIV/AIDS.
- The study highlights the importance of specific T-cell epitopes in controlling lentiviral infections.
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