Abstract

Current HIV vaccine candidates elicit reasonably potent cellular immune responses, but only low levels of neutralizing antibodies. Such CTL based vaccines (e.g., those based on DNA immunization) may not prevent infection, but can have a beneficial effect on disease course. In contrast, passively infused antibodies can provide complete protection, but must be administered in doses that result in serum antibody levels much higher than can be generated by current immunization strategies. We are using the SIV macaque model to study the protective effect of CTL based vaccines on SIV infection. In particular, we are studying the ability of such vaccines to affect plasma viral load, memory CD4 T-cell counts and overall survival.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Intramural Research (Z01)
Project #
1Z01AI005009-05
Application #
7299809
Study Section
(BSL)
Project Start
Project End
Budget Start
Budget End
Support Year
5
Fiscal Year
2006
Total Cost
Indirect Cost

  Institution

Name
Niaid Extramural Activities
Department
Type
DUNS #
City
State
Country
United States
Zip Code

  Publications

Keele, Brandon F; Li, Hui; Learn, Gerald H et al. (2009) Low-dose rectal inoculation of rhesus macaques by SIVsmE660 or SIVmac251 recapitulates human mucosal infection by HIV-1. J Exp Med 206:1117-34
Whitney, James B; Luedemann, Corinne; Hraber, Peter et al. (2009) T-cell vaccination reduces simian immunodeficiency virus levels in semen. J Virol 83:10840-3
Letvin, Norman L; Rao, Srini S; Dang, Vi et al. (2007) No evidence for consistent virus-specific immunity in simian immunodeficiency virus-exposed, uninfected rhesus monkeys. J Virol 81:12368-74
Letvin, Norman L; Mascola, John R; Sun, Yue et al. (2006) Preserved CD4+ central memory T cells and survival in vaccinated SIV-challenged monkeys. Science 312:1530-3
Sun, Yue; Schmitz, Jorn E; Buzby, Adam P et al. (2006) Virus-specific cellular immune correlates of survival in vaccinated monkeys after simian immunodeficiency virus challenge. J Virol 80:10950-6
Acierno, Paula M; Schmitz, Jorn E; Gorgone, Darci A et al. (2006) Preservation of functional virus-specific memory CD8+ T lymphocytes in vaccinated, simian human immunodeficiency virus-infected rhesus monkeys. J Immunol 176:5338-45
Seaman, Michael S; Santra, Sampa; Newberg, Michael H et al. (2005) Vaccine-elicited memory cytotoxic T lymphocytes contribute to Mamu-A*01-associated control of simian/human immunodeficiency virus 89.6P replication in rhesus monkeys. J Virol 79:4580-8
Mascola, John R; Sambor, Anna; Beaudry, Kristin et al. (2005) Neutralizing antibodies elicited by immunization of monkeys with DNA plasmids and recombinant adenoviral vectors expressing human immunodeficiency virus type 1 proteins. J Virol 79:771-9
Sun, Yue; Schmitz, Jorn E; Acierno, Paula M et al. (2005) Dysfunction of simian immunodeficiency virus/simian human immunodeficiency virus-induced IL-2 expression by central memory CD4+ T lymphocytes. J Immunol 174:4753-60
Zhang, Lei; Ribeiro, Ruy M; Mascola, John R et al. (2004) Effects of antibody on viral kinetics in simian/human immunodeficiency virus infection: implications for vaccination. J Virol 78:5520-2

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