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Expression of CD94/NKG2-A on Human T Lymphocytes Is Induced by IL-12: Implications for Adoptive Immunotherapy

Abstract : NK cell receptors (NKRs) are expressed on a subset of human T cells, predominantly CD8(+), within which they can modulate TCR-mediated functions. In an attempt to identify the mechanisms leading to NKR expression, we analyzed the capacity of IL-12 to modulate the expression by T cells of the components of the CD94/NKG2-A inhibitory receptor, a member of the C-type lectin-like family of NKR. We show that IL-12 induces the expression of NKG2-A and/or CD94 by CD8(+) T cells in culture, and that this induction was mediated neither by IFN-gamma nor by IL-15. We also show, using the redirected killing assay, that IL-12-induced expression of both CD94 and NKG2-A led to the acquisition by T cells of a functional inhibitory receptor. Expression of the CD94/NKG2-A inhibitory receptor was also induced by IL-12 during T cell Ag stimulation so that in the presence of this cytokine a high proportion of melanoma-reactive CTL induced from PBL by melanoma peptide stimulation expressed this receptor. This study emphasizes the implication of IL-12 in the modulation of immune responses through NKR induction.
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https://www.hal.inserm.fr/inserm-03349344
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Submitted on : Monday, September 20, 2021 - 2:42:18 PM
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Laurent Derre, Murielle Corvaisier, Marie-Christine Pandolfino, Elisabeth Diez, Francine Jotereau, et al.. Expression of CD94/NKG2-A on Human T Lymphocytes Is Induced by IL-12: Implications for Adoptive Immunotherapy. Journal of Immunology, Publisher : Baltimore : Williams & Wilkins, c1950-. Latest Publisher : Bethesda, MD : American Association of Immunologists, 2002, 168 (10), pp.4864-4870. ⟨10.4049/jimmunol.168.10.4864⟩. ⟨inserm-03349344⟩

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