IL-36γ promotes IFN-γ production by CD8, NK, and γδ T cells
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IL-36γ transforms the tumor microenvironment and exerts strong antitumor effects
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Tumor cells expressing IL-36γ function as an effective tumor vaccine
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Expression of IL-36γ correlates inversely with the progression of human cancer
Summary
Cytokines play a pivotal role in regulating tumor immunogenicity and antitumor immunity. IL-36γ is important for the IL-23/IL-17-dominated inflammation and anti-BCG Th1 immune responses. However, the impact of IL-36γ on tumor immunity is unknown. Here we found that IL-36γ stimulated CD8+ T cells, NK cells, and γδ T cells synergistically with TCR signaling and/or IL-12. Importantly, IL-36γ exerted profound antitumor effects in vivo and transformed the tumor microenvironment in favor of tumor eradication. Furthermore, IL-36γ strongly increased the efficacy of tumor vaccination. Moreover, IL-36γ expression inversely correlated with the progression of human melanoma and lung cancer. Our study establishes a role of IL-36γ in promoting antitumor immune responses and suggests its potential clinical translation into cancer immunotherapy.
