Transcriptomics

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Remodeling of the tumor microenvironment via blockade of LAIR-1 and TGF-β signaling [bulk RNA-seq]


ABSTRACT: Collagens in the extracellular matrix (ECM) provide a physical barrier to tumor immune infiltration, while also acting as a ligand for immune inhibitory receptors. Transforming growth factor-β (TGF-β) is a key contributor to shaping the ECM by stimulating the production and remodeling of collagens. TGF-β-activation signatures and collagen-rich environments have both been associated with T-cell exclusion and lack of responses to immunotherapy. Here we describe the effect of targeting collagens that signal through the LAIR-1 inhibitory receptor in combination with blockade of TGF-β and programmed cell death ligand 1 (PD-L1). This approach remodeled the tumor collagenous matrix, enhanced tumor infiltration and activation of CD8+ T cells, and repolarized suppressive macrophage populations resulting in high cure rates and long-term tumor-specific protection across murine models of colon and mammary carcinoma. The results highlight the advantage of direct targeting of ECM components in combination with immune checkpoint blockade therapy.

ORGANISM(S): Homo sapiens

PROVIDER: GSE195685 | GEO | 2022/03/09

REPOSITORIES: GEO

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