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. 2020 May 2;19:81. doi: 10.1186/s12943-020-01200-x

Fig. 4.

Fig. 4

T-cell exhaustion in patients with HPD. On the basis of a high concentration of neoantigen, the upregulation of exhausted T cells with high coexpression of PD-1, LAG3, TIM3, CTLA4 and TIGIT is connected to the resistance to anti-PD-1 therapy. Furthermore, exhausted T cells fail to reinvigorate as memory T cells ultimately become re-exhausted upon antigen clearance