Background: The immunotherapies against cancer, autoinmmune diseases or infection are remarkable development. These days programmed cell death (PD)-1 antibody-induced immune checkpoint blockade or chimeric antigen receptor-T cells (CAR-T) have been shown to have eminent therapeutic effects on tumor development. We have focused on adoptive transfer with human gamma delta T cells for novel immunotherapies. Additionally, IL-18 is one of the cytokines that enhances cytokine secretion and cytotoxicity of human gamma delta T cells.
Method: Thus, we established novel cell lines stably expressing and secreting various types of human recombinant IL-18 proteins to their culture supernatants using episomal vector. We also differentiated primary cultured human gamma delta T cells from peripheral blood mononuclear leukocytes to validate biological activity of the IL-18 proteins using measuring IFN-γ by ELISA.
Results And Conclusion: Finally, we demonstrated that the supernatant could activate human gamma delta T cells using monitoring interferon gamma in culture medium.
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