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LAG3 and PD1 synergize on CD8+ T cells to drive T cell exhaustion and hinder autocrine IFN gamma-dependent anti-tumor immunity

GSE262740 Mus musculus Expression profiling by high throughput sequencing; Other 5 samples Submitted 2024/08/07 Platform GPL24247
Summary
Combined nivolumab (anti-PD1) and relatlimab (anti-LAG3) have shown enhanced effectiveness in melanoma patients. However, how these two receptors work together to hinder anti-tumor immunity remains unclear. Our study demonstrates that PD1/LAG3-deficient CD8+ T cells with more effectively clearing tumors and survive longer in melanoma mouse models. These PD1/LAG3-deficient CD8+ T cells have unique transcriptional profiles, broad TCR clonality, and enriched effector-like and interferon-responsive genes, leading to increased IFN gamma release indicating functionality. PD1 and LAG3 together drive T cell exhaustion, with a significant impact on TOX modulation. Mechanistically, autocrine IFN gamma signaling is crucial for enhancing anti-tumor immunity in PD1/LAG3-deficient CD8+ T cells, providing insights into the enhanced efficacy of combined PD1 and LAG3 targeting.
Published in
LAG-3 and PD-1 synergize on CD8(+) T cells to drive T cell exhaustion and hinder autocrine IFN-γ-dependent anti-tumor immunity
Andrews LP, Butler SC, Cui J et al. · Cell 2024 · PMID 39121848 · doi:10.1016/j.cell.2024.07.016
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Also filed as BioProject PRJNA1093086 and SRA study SRP498546. Searching any of these in the dataset finder brings you back here.

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