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IL-18 engineered to avoid decoy-receptor binding enhances tumor rejection by anti-CTLA-4 in kidney cancer models through immune microenvironment remodeling.

GSE279662 Mus musculus Expression profiling by high throughput sequencing; Other 8 samples Submitted 2024/11/01 Platform GPL24247
Summary
The cytokine interleukin-18 (IL-18) has immunostimulatory effects but is negatively regulated by a secreted binding protein, IL-18BP, that limits IL-18’s anti-cancer efficacy. A “decoy-resistant” form of IL-18 (DR-18), that avoids sequestration by IL-18BP while maintaining its immunostimulatory potential has recently been developed. Here, we investigate the therapeutic potential of DR-18 in renal cell carcinoma (RCC). We used immunocompetent RCC murine models to assess the efficacy of DR-18 in combination with single- and dual-agent anti-PD-1 and anti-CTLA-4. In contrast to preclinical models of other tumor types, in RCC models DR-18 enhanced the activity of anti-CTLA-4 but not anti-PD-1 treatment. This activity correlated with intra-tumoral enrichment and clonal expansion of effector CD8+ T cells, decreased regulatory T cell levels, and enrichment of pro-inflammatory, anti-tumor myeloid cell populations, as assessed by scRNA- and scTCR-seq.
Published in
Decoy-resistant IL-18 reshapes the tumor microenvironment and enhances rejection by anti-CTLA-4 in renal cell carcinoma
Schoenfeld DA, Djureinovic D, Su DG et al. · JCI insight 2024 · PMID 39561007 · doi:10.1172/jci.insight.184545
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Also filed as BioProject PRJNA1171556 and SRA study SRP537847. Searching any of these in the dataset finder brings you back here.

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