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Tat-vaccinated macaques do not control simian immunodeficiency virus SIVmac239 replication
Todd M Allen1, Lorenzo Mortara, Bianca R Mothé
1Wisconsin Regional Primate Research Center, University of Wisconsin, Madison, Wisconsin 53715, USA.
Journal of Virology
|March 22, 2002
Summary
Targeting HIV regulatory proteins with vaccines is crucial. However, Tat-specific T-cell responses did not control simian immunodeficiency virus replication in a vaccine study.
Area of Science:
- Immunology
- Virology
- Vaccinology
Background:
- Regulatory proteins of human immunodeficiency virus (HIV) are potential vaccine targets.
- Cytotoxic T lymphocytes (CTL) play a role in controlling viral infections.
Purpose of the Study:
- To assess the role of Tat-specific CTL in controlling simian immunodeficiency virus (SIV) replication.
- To evaluate a DNA prime, vaccinia virus Ankara-boost vaccine regimen targeting SIV Tat.
Main Methods:
- Induction of Tat-specific CTL using a DNA prime, vaccinia virus Ankara-boost vaccine regimen in a SIVmac239 model.
- Measurement of viral load (peak and set point) to assess control of replication.
Main Results:
- Tat-specific CTL were successfully induced by the vaccine regimen.
- No significant reduction in peak or viral set point was observed compared to controls.
Conclusions:
- Induction of Tat-specific CTL alone may not be sufficient for controlling pathogenic SIVmac239 replication.
- Further research is needed to identify effective vaccine strategies targeting regulatory proteins.