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Cited by 364

The DOI matches its Crossref record; 58 of the 58 references it cites were found in a registry or an index.

IL-21 Is Produced by NKT Cells and Modulates NKT Cell Activation and Cytokine Production

Coquet, Jonathan M, Kyparissoudis, Konstantinos, Pellicci, Daniel G, Besra, Gurdyal, Berzins, Stuart P, Smyth, Mark J, Godfrey, Dale I·2007·The Journal of Immunology

Abstract

The common γ-chain cytokine, IL-21, is produced by CD4+ T cells and mediates potent effects on a variety of immune cells including NK, T, and B cells. NKT cells express the receptor for IL-21; however, the effect of this cytokine on NKT cell function has not been studied. We show that IL-21 on its own enhances survival of NKT cells in vitro, and IL-21 increases the proliferation of NKT cells in combination with IL-2 or IL-15, and particularly with the CD1d-restricted glycosphingolipid Ag α-galactosylceramide. Similar to its effects on NK cells, IL-21 enhances NKT cell granular morphology, including granzyme B expression, and some inhibitory NK receptors, including Ly49C/I and CD94. IL-21 also enhanced NKT cell cytokine production in response to anti-CD3/CD28 in vitro. Furthermore, NKT cells may be subject to autocrine IL-21-mediated stimulation because they are potent producers of this cytokine following in vitro stimulation via CD3 and CD28, particularly in conjunction with IL-12 or following in vivo stimulation with α-galactosylceramide. Indeed, NKT cells produced much higher levels of IL-21 than conventional CD4 T cells in this assay. This study demonstrates that NKT cells are potentially a major source of IL-21, and that IL-21 may be an important factor in NKT cell-mediated immune regulation, both in its effects on NK, T, and B cells, as well as direct effects on NKT cells themselves. The influence of IL-21 in NKT cell-dependent models of tumor rejection, microbial clearance, autoimmunity, and allergy should be the subject of future investigations.

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Metadata

Authors
Coquet, J. M., Kyparissoudis, K., Pellicci, D. G., Besra, G., Berzins, S. P., Smyth, M. J., & Godfrey, D. I.
Venue
The Journal of Immunology
Published
2007-03-01
Volume
178
Issue
5
Pages
2827-2834
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W2163992046
Cited by
364
References
58
FWCI
13.16
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: IL-21 Is Produced by NKT Cells and Modulates NKT Cell Activation and Cytokine Production. https://app.cochat.ai/papers/10.4049/jimmunol.178.5.2827
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Coquet, J. M., Kyparissoudis, K., Pellicci, D. G., Besra, G., Berzins, S. P., Smyth, M. J., & Godfrey, D. I. (2007). IL-21 Is Produced by NKT Cells and Modulates NKT Cell Activation and Cytokine Production. The Journal of Immunology. https://doi.org/10.4049/jimmunol.178.5.2827

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