Regulation of Specific Cell Clusters in TCR-T Cells Responding to Differential Expression of Tumor PD-L1
Keywords:
TCR-T, PD-L1, scRNA-seq, cell clusters, gene expression
Abstract
PD-L1 signaling is essential in regulating T cell function and keeping the balance of tumor microenvironment, but its role in modifying TCR-T cell cytotoxicity remains unknown. MART-1-specific TCR-T cells (TCR-TMART-1) were stimulated by MEL-526 tumor cells expressing different proportions of PD-L1 and used to perform cytotoxicity assays and single-cell RNA sequencing. Percentage changes of different specific cell clusters were analyzed. The percentage of cluster HLA-DR+CD38+CD8+ was upregulated after antigen stimulation, and tumor PD-L1 modified TCR-T cell function through downregulating the percentages of HLA-DR+CD28+CD8+ and HLA-DR+CD38+CD8+ subsets which were higher in TCR-TMART-1 than in Tnull.
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Published
2020-07-15
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