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The interplay between tumor‐associated macrophages (TAMs) and gastric cancer. TAMs and tumor cells stimulate each other by secreting several cytokines and growth factors. M1 and M2 macrophages can be reprogrammed into each other, leading the immunological shift within the tumor microenvironment. Myeloid‐derived suppressor cells (MDSCs) suppress host immunity by inhibiting T‐cell responses, and have pro‐tumorigenic effects
