Identification of clinically relevant subsets CD39 < sup > + < /sup > PD-1 < sup > + < /sup > CD8 < sup > + < /sup > T cells and CD39 < sup > + < /sup > regulatory T cells in intrahepatic cholangiocarcinoma using single-cell CyTOF

This study utilized mass cytometry by time of flight (CyTOF) to comprehensively analyze immune cell populations in fresh iCCA tumor samples and adjacent peritumor liver tissues. Notably, NK cell percentages significantly decreased in iCCA lesions compared to peritumor liver tissues. Conversely, an enrichment of immunosuppressive CD39+Foxp3+CD4+ regulatory T cells (CD39+T-regs) and exhausted-like CD8+T cells (with pronounced CD39 and PD-1 expression) within TIME was identified and confirmed by multiplex immunofluorescence staining in an independent patient cohort (n = 140). Crucially, tumor-infiltrating CD39+T-regs and CD39+PD-1+CD8+T cells emerged as independent prognostic indicators associated with an unfavorable prognosis in iCCA. These findings unveil the intricate immune landscape within iCCA, offering valuable insights for disease management and novel cancer immunotherapies.PMID:38608405 | DOI:10.1016/j.tranon.2024.101954
Source: Translational Oncology - Category: Cancer & Oncology Authors: Source Type: research