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Chimeric immune receptor T cells bypass class I requirements and recognize multiple cell types relevant in HIV-1 infection. Virology 2003
AIDS Research Center and Infectious Disease Unit, Massachusetts General Hospital, Charlestown, MA 02129, USA.
Transduction of T cells with a chimeric immune T cell receptor (CIR) has been proposed as a strategy to generate cellular immunity against viral pathogens such as HIV-1. In the case of the CD4-CD3-zeta chain (CD4-zeta) CIR, specificity for HIV-1 is conferred by binding of the CD4 moiety to gp120 on the surface of infected cells. However, it is unclear whether CD4-zeta-T cells may differ from naturally derived CD8(+) cytotoxic T cells (CTL) in their susceptibility to viral escape mechanisms or ability to recognize different cell types that support viral replication. We demonstrate that CIR-T cells can mediate antiviral activity against HIV-1 in cells that are resistant to class I-restricted CTL-mediated activity. Furthermore, CIR-T cells can suppress virus in multiple cell types, including monocytes, dendritic cells, and lymphocyte-dendritic cell clusters. These results provide evidence that T cells can be redirected against novel targets, and that independence from the class I pathway may have distinct advantages.
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