Immune cells in cancer

Macrophages are white blood cells capable of shifting between starkly different functional states—promoting inflammation to fight infection or suppressing it to support tissue repair—and tumors exploit this flexibility to their own advantage. Researchers studying immune cells in cancer focus on how macrophages and related myeloid cells, including monocytes and myeloid-derived suppressor cells, are recruited into tumors and reprogrammed into states that dampen immune attack rather than enabling it. A central open question is what molecular signals, including metabolic cues within the tumor microenvironment, lock macrophages into these pro-tumor states and whether those signals can be reversed therapeutically. Understanding the full spectrum of macrophage heterogeneity—including differences between tissue-resident and newly recruited populations—is an active direction that may reveal why some tumors respond to immunotherapy while others do not.

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Keywords

MacrophageActivationPolarizationTumor-associatedMonocytesMyeloid-derived suppressor cells