Abstract
Cytokines are key mediators of immune regulation, orchestrate communication between immune cells, and play a pivotal role in shaping the immune landscape during chronic infection and cancer. The therapeutic potential of IL-15/IL-15Rα and IL-12 has been explored individually in various immunotherapeutic strategies, though not as a combination. Therefore, we investigated whether the combination of IL-15/IL-15Rα and IL-12 treatment would enhance the potency and quality of either NK cells, SIV-specific CD8 T cells, or both, compared with single cytokine treatment. Our findings reveal that in vitro IL-15/IL-15Rα and IL-15/IL-15Rα plus IL-12 treatment results in an expansion of functional CD8 T cells and NK cells from uninfected and chronically infected macaques with simian/human immunodeficiency virus. Additionally, the cytokine combination significantly reduced CCR5 expression on total CD4 T cells, limiting the number of viral targets. This study supports the potential utilization of combined IL-15/IL-15Rα plus IL-12 treatment for chronic viral infections and cancer.
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