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Abstract CD8 + T cells play a crucial role in anti‐tumour immunity, but they often undergo exhaustion, which affects the anti‐tumour activity of CD8 + T cells. The effect and mechanism of exhausted CD8 + T cells have become the focus of anti‐tumour immunity research. Recently, a large number of studies have confirmed that long‐term antigen exposure can induce exhaustion. Cytokines previously have identified their effects (such as IL‐2 and IL‐10) may play a dual role in the exhaustion process of CD8 + T cells, suggesting a new mechanism of inducing exhaustion. This review just focuses our current understanding of the biology of exhausted CD8 + T cells, including differentiation pathways, cellular characteristics and signalling pathways involved in inducing exhaustion, and summarizes how these can be applied to tumour immunotherapy.
Huang et al. (Mon,) studied this question.
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