PD-L1 restrains PD-1⁺Nrp1^lo Treg cells to suppress inflammation-driven colorectal tumorigenesis.

ABSTRACT: T cells function not only as an essential component of host cancer immunosurveillance but also as a regulator of colonic inflammation, a process that promotes colorectal cancer. Programmed death-ligand 1 (PD-L1) is a T cell-negative regulator, but its role in regulation of T cell functions in the context of colorectal cancer is unknown. We report that global deletion of Cd274 results in increased colonic inflammation, PD-1⁺ T cells, and inflammation-driven colorectal tumorigenesis in mice. Single-cell RNA sequencing (scRNA-seq) analysis revealed that PD-L1 suppresses subpopulations of programmed cell death protein 1 (PD-1)⁺Nrp1^lo regulatory T (Treg) cells and interleukin (IL) 6⁺ neutrophils in colorectal tumor. Treg cells produce transforming gro

SUBMITTER: Poschel DB 

PROVIDER: S-EPMC11574783 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature