Toll-like receptor ligands induce expression of the costimulatory molecule CD155 on antigen-presenting cells.
Toll-like receptor ligands induce expression of the costimulatory molecule CD155 on antigen-presenting cells.
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DOI:
10.1371/journal.pone.0054406
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Gasser S
中科院分区:
文献类型:
--
作者:
Kamran N;Takai Y;Miyoshi J;Biswas SK;Wong JS;Gasser S
Genotoxic stress and RAS induce the expression of CD155, a ligand for the immune receptors DNAM-1, CD96 and TIGIT. Here we show that antigen-presenting cells upregulate CD155 expression in response to Toll-like receptor activation. Induction of CD155 by Toll-like receptors depended on MYD88, TRIF and NF-κB. In addition, IRF3, but not IRF7, modulated CD155 upregulation in response to TLR3 signals. Immunization of CD155-deficient mice with OVA and the TLR9 agonist CpG resulted in increased OVA-specific IgG2a/c titers when compared to wild type mice. Splenocytes of immunized CD155-deficient mice secreted lower levels of IL-4 and fewer IL-4 and GATA-3 expressing CD4+ T cells were present in the spleen of Cd155−/− mice. Our data suggest that CD155 regulates Th2 differentiation. Targeting of CD155 in immunization protocols using peptides may represent a promising new approach to boost protective humoral immunity in viral vaccines.
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