Co-inhibitory roles for glucocorticoid-induced TNF receptor in CD1d-dependent natural killer T cells

Shuming Chen, Lishomwa C. Ndhlovu, Takeshi Takahashi, Kazuyoshi Takeda, Yoshinori Ikarashi, Toshiaki Kikuchi, Kazuko Murata, Pier Paolo Pandolfi, Carlo Riccardi, Masao Ono, Kazuo Sugamura, Naoto Ishii

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Invariant natural killer T (iNKT) cells are a special subset of αβ T cells with invariant TCR, which recognize α-galactosylceramide (α-GalCer) presented by CD1d. In addition to signals through the invariant TCR upon stimulation with α-GalCer, costimulatory signals, such as signals through CD28 and OX40, are indispensable for full activation of iNKT cells. In this study, we investigated the functions of a well-known costimulatory molecule, glucocorticoid-induced TNF receptor (GITR), on Ag-induced iNKT cell activation. Unexpectedly, engagement of GITR by agonistic mAb DTA-1 suppressed proliferation and cytokine production of iNKT cells upon α-GalCer stimulation. In addition, GITR signals in iNKT cells during only the Ag-priming phase was sufficient to inhibit the iNKT cell activation. Consistent with these results, the GITR-deficient iNKT cells showed enhanced proliferation and increased cytokine production upon α-GalCer stimulation both in vitro and in vivo. Furthermore, the in vivo administration of a-GalCer suppressed tumor metastasis more efficiently in GITR-deficient mice than in wild-type mice. Collectively, GITR plays a co-inhibitory role in Ag-induced iNKT cell activation.

Original languageEnglish
Pages (from-to)2229-2240
Number of pages12
JournalEuropean Journal of Immunology
Volume38
Issue number8
DOIs
Publication statusPublished - 2008 Aug 1

Keywords

  • Co-inhibitory signal
  • Glucocorticoid-induced TNF receptor
  • Invariant NKT cell

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Fingerprint Dive into the research topics of 'Co-inhibitory roles for glucocorticoid-induced TNF receptor in CD1d-dependent natural killer T cells'. Together they form a unique fingerprint.

  • Cite this

    Chen, S., Ndhlovu, L. C., Takahashi, T., Takeda, K., Ikarashi, Y., Kikuchi, T., Murata, K., Pandolfi, P. P., Riccardi, C., Ono, M., Sugamura, K., & Ishii, N. (2008). Co-inhibitory roles for glucocorticoid-induced TNF receptor in CD1d-dependent natural killer T cells. European Journal of Immunology, 38(8), 2229-2240. https://doi.org/10.1002/eji.200838167