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. 2022 Jan 4;8:796385. doi: 10.3389/fmolb.2021.796385

FIGURE 3.

FIGURE 3

Tumor-derived EVs modulate the immune system. Tumor-derived EVs can suppress NK cells functional activity, induce M2 macrophage polarization, recruit Tregs and proliferate Bregs, thus inhibiting immune response. On the other hand, tumor-derived EVs can also enhance NK cells cytotoxicity and induce M1 macrophage polarization, thereby stimulating immune response.