T cells and transferred these cells or control OT-1 CD8+T cells
into wild-type (WT) mice bearing MC38-Ova tumors. Recipients
of MT-OT1 CD8+T cells failed to exhibit tumor growth control
compared to recipients of control OT-1 CD8+T cells (Figure 2C).
Indeed, tumor growth in recipients of MT-OT1 CD8+T cells
resembled that of mice that did not receive any tumor-antigen-
specific CD8+T cells. These results indicate a CD8+T cell
intrinsic role of MT. Taken together, our data support that
expression of metallothioneins in CD8+T cells plays a critical
role in suppressing anti-tumor CD8+T cell responses.C1C2C10
C7C5C6C33031
genesC4C8
C9C1
C2C10C7C5
C6C3
C4C8
C9Naïve EffMemDN SP DP–3 –1 1 2 3ABCDz-scoreCentered intensity–4 –2 0 2 4CD8 in vivo
activationLCMV
exhaustionTBX21KITD630039A03RIKGEMCREB3L2FASLITGA1CD244.LOC677008CD81SERPINA3GC1QTNF6CCRL2TNFRSF9ARSBTOXCDKN2BPLSCR1CSF1CDKN3OSBPL3NRN1
DUSP4SERPINE2GZMC
MT1Tumor
dissociationCD8+Tim3+ PD1+Tim3+PD1+Tim3– PD1+Tim3–PD1+Tim3– PD1–Tim3–PD1–Naïve EffMem DN SP DPFunctionRankImplant
carcinoma2–3 weeks024
–Log 10 (p-value)Significance thresholdFigure 1. CD8+T Cell Dysfunction and Activation Are Transcriptionally Intertwined
(A) Outline of experimental strategy. CT26 colon carcinoma was used.
(B) Heatmap of the 3,031 differentially expressed genes across the TIL subpopulations. Naive: CD8+CD62LhiCD44lowcells from non-tumor-bearing Balb/c mice;
EffMem: effector memory CD8+CD62LlowCD44hicells from non-tumor-bearing Balb/c mice; DN: CD8+Tim3PD1; SP: CD8+Tim3PD1+; DP: CD8+Tim3+PD1+
TILs from CT26 colon carcinoma.
(C) Cluster 2 is significantly enriched with genes upregulated in a CD8+viral exhaustion signature (Doering et al., 2012), as well as an in vivo CD8+activation
signature (Sarkar et al., 2008). p values determined by hypergeometric test.
(D) Heatmap of the top-ranking genes from cluster 2.
See alsoFigure S1andTables S1andS2.
1502 Cell 166 , 1500–1511, September 8, 2016