Mechanism of murine Vgamma1+ gamma delta T cell-mediated innate immune response against Listeria monocytogenes infection

European Journal of Immunology
G MatsuzakiKikuo Nomoto

Abstract

Murine gamma delta T cells participate in innate immune response against infection of the intracellular bacterium Listeria monocytogenes. In the present report, we analyzed the mechanism of the gamma delta T cell-mediated response against L. monocytogenes infection. gamma delta T cell-enriched spleen cells of L. monocytogenes-infected mice produced IFN-gamma in vitro in response to L. monocytogenes-infected spleen cells. The IFN-gamma production was abrogated by depletion of Vgamma1+ gamma delta T cells. IFN-gamma production of the Vgamma1+ gamma delta T cells in response to L. monocytogenes-infected spleen cells required IL-12. However, addition of Fab fragment of anti-TCR gamma delta monoclonal antibodies (mAb) failed to block the response, suggesting that the response requires no TCR-mediated antigen recognition. Interestingly, Vgamma1+ gamma delta T cells of naive mice also produced IFN-gamma in response to L. monocytogenes-infected spleen cells in an IL-12-dependent manner. Furthermore, the IL-12 receptor (IL-12R) gene was expressed on the Vgamma1+ gamma delta T cells of naive mice as well as those of L. monocytogenes-infected mice although naive alpha beta T cells lack IL-12R expression. All the results suggest that the V...Continue Reading

References

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Citations

Jun 6, 2003·Current Opinion in Immunology·Julie JamesonWendy L Havran
Jun 3, 2008·FEMS Immunology and Medical Microbiology·Thomas WelteTian Wang
Sep 18, 2004·European Journal of Immunology·Francesco DieliAlfredo Salerno
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May 28, 2019·Microbiology Spectrum·Sarah E F D'Orazio

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