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. 2023 Nov 22;21:842. doi: 10.1186/s12967-023-04709-z

Fig. 2.

Fig. 2

Macrophage activation and M1/M2 typing. Macrophages polarized into classically activated (M1) or alternatively activated (M2) macrophages under the influence of different cytokines or other factors secrete different cytokines to change the cellular microenvironment to a pro-inflammatory or anti-inflammatory state, exerting anti-tumor or pro-tumor effects at the tumor site