A20 controls macrophage to elicit potent cytotoxic CD4(+) T cell response.
basic_science · Level V
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- Record sourced from PubMed, PMID 23145026.
- Also identified by DOI 10.1371/journal.pone.0048930 and PMC identifier PMC1323501.
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Abstract
Emerging evidence indicates that CD4(+) T cells possess cytotoxic potential for tumor eradication and perforin/granzyme-mediated cytotoxicity functions as one of the important mechanisms for CD4(+) T cell-triggered cell killing. However, the critical issue is how the cytotoxic CD4(+) T cells are developed. During the course of our work that aims at promoting immunostimulation of APCs by inhibition of negative regulators, we found that A20-silenced Mф drastically induced granzyme B expression in CD4(+) T cells. As a consequence, the granzyme-highly expressing CD4(+) T cells exhibited a strong cytotoxic activity that restricted tumor development. We found that A20-silenced Mф activated cytotoxic CD4(+) T cells by MHC class-II restricted mechanism and the activation was largely dependent on enhanced production of IFN-γ.