Developing an HIV cytotoxic T‐lymphocyte vaccine: issues of CD8 T‐cell quantity, quality and location

D Masopust - Journal of internal medicine, 2009 - Wiley Online Library
Journal of internal medicine, 2009Wiley Online Library
Issues of quantity, quality and location impact the ability of CD8 T cells to mediate protection
from infection. These issues are considered in light of human immunodeficiency virus
(HIV)/simian immunodeficiency virus (SIV) vaccination. Methods are reviewed that result in
100‐to 1000‐fold higher frequencies of vaccine‐specific memory CD8 T cells than that
achieved by current HIV/SIV vaccine approaches. Data demonstrating that location within
mucosal tissues has a direct impact on memory CD8 T‐cell function are discussed …
Abstract
Issues of quantity, quality and location impact the ability of CD8 T cells to mediate protection from infection. These issues are considered in light of human immunodeficiency virus (HIV)/simian immunodeficiency virus (SIV) vaccination. Methods are reviewed that result in 100‐ to 1000‐fold higher frequencies of vaccine‐specific memory CD8 T cells than that achieved by current HIV/SIV vaccine approaches. Data demonstrating that location within mucosal tissues has a direct impact on memory CD8 T‐cell function are discussed. Arguments are made that establishing memory CD8 T cells within mucosal sites of transmission, a priori to natural infection, may be essential for conferring optimal and rapid protection. Lastly, it is proposed that heterologous prime‐boost vaccination with recombinant live replicating vectors, which has the potential to induce tremendous numbers of cytolytic memory CD8 T cells within mucosal tissues, would provide a far more stringent test of the hypothesis that memory CD8 T cells could, in principal, form the basis for a preventative HIV vaccine.
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