Table 1. Antibodies used in this experiment.
| Antibody | Vendor | Lot number | Concentration |
| Primary antibody | |||
| α-actin | abcam | Ab5694 | IF:1:200 |
| β-actin | ABclonal | AC026 | WB:1:1000 |
| CD3 | Santa Cruz | SC-20047 | IF:1:50 |
| CD68 | abcam | Ab31360 | IF:1:100 |
| PCNA | abcam | Ab29 | IF:1:100 |
| PD-1 | ABclonal | A11973 | IF,IHC:1:50 WB:1:500 |
| PD-L1 | ABclonal | A11273 | IF:1:50 |
| TGF β1 | Santa Cruz | SC-130348 | WB:1:100 IF:1:50 |
| Secondary antibody | |||
| Goat anti rabbit | bioworld | BS12478 | 1:100 |
| Goat anti mouse | bioworld | BS13278 | 1:100 |
| 488 Goat anti mouse | ABclonal | AS073 | 1:200 |
| CY3 Goat anti rabbit | ABclonal | AS007 | 1:200 |
| 488 Donkey anti rabbit | ABclonal | AS035 | 1:200 |
| Rhodamine Donkey anti goat | ABclonal | AS069 | 1:200 |
| 488 Goat anti rabbit | ABclonal | AS073 | 1:200 |