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J Immunol. 2015 Jun 15;194(12):5644-53. doi: 10.4049/jimmunol.1401942. Epub 2015 May 13.

CD155 (PVR/Necl5) mediates a costimulatory signal in CD4+ T cells and regulates allergic inflammation.

Author information

1
Department of Immunology, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan;
2
Department of Immunology, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan; Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba, Ibaraki 305-8575, Japan;
3
Institute of Immunology, Hannover Medical School, Hannover 30625, Germany; and.
4
Department of Immunology, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan; Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba, Ibaraki 305-8575, Japan; Japan Science and Technology Agency, Core Research for Evolutional Science and Technology, University of Tsukuba, Ibaraki 305-8575, Japan kazukos@md.tsukuba.ac.jp ashibuya@md.tsukuba.ac.jp.
5
Department of Immunology, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan; kazukos@md.tsukuba.ac.jp ashibuya@md.tsukuba.ac.jp.

Abstract

Although Th1 and Th2 cells are known to be involved in allergic inflammatory diseases, the molecular mechanisms underlying their differentiation are incompletely understood. In this study, we identified CD155 as a costimulatory molecule on CD4(+) T cells. Importantly, CD155-mediated signaling induced Th1 development in both humans and mice, as evidenced by production of IFN-γ and upregulation of Tbx21 transcription; these effects were independent of IL-12 but dependent on NF-κB-induced autocrine IFN-γ that triggered positive feedback via STAT1 activation. Mice genetically deficient in CD155 or treated with anti-CD155 Ab exhibited attenuated Th1-type contact hypersensitivity. Thus, CD155 plays an important regulatory role in helper T cell differentiation and allergic diseases.

PMID:
25972481
DOI:
10.4049/jimmunol.1401942
[Indexed for MEDLINE]
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