1 D), while TIGIT showed a strong trend of higher expression in the absence of CD28 (Table S 3 ).
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CD28/PD1 co-expression: dual impact on CD8<sup>+</sup> T cells in peripheral blood and tumor tissue, and its significance in NSCLC patients' survival and ICB response.
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GSEA reveals a clear trend for a higher expression of an “exhausted” transcriptional signature, while “pre-exhaustion” genes were more correlated with CD28 + cells.
KLRG1, a marker of both terminal differentiation [ 29 ] and context-dependent T-cell activation [ 28 ] showed a trend for higher expression in CD28 + T cells (Fig. 1 E).
While the observed differences did not reach statistical significance, there was a discernible trend in Ag-specific CD28 − T-cell clones towards exhibiting a higher expression of an "exhausted" transcriptional signature, while "pre-exhaustion" genes displayed a stronger correlation with CD28 + cells (Fig.