Cancer Cells Resistance Shaping by Tumor Infiltrating Myeloid Cells
Marcin Domagala1,2,3, Chloé Laplagne1,2,3, Edouard Leveque1,2,3
1Centre de Recherches en Cancérologie de Toulouse, Inserm UMR1037, 31037 Toulouse, France.
Abstract:
Interactions between malignant cells and neighboring stromal and immune cells profoundly shape cancer progression. New forms of therapies targeting these cells have revolutionized the treatment of cancer. However, in order to specifically address each population, it was essential to identify and understand their individual roles in interaction between malignant cells, and the formation of the tumor microenvironment (TME). In this review, we focus on the myeloid cell compartment, a prominent, and heterogeneous group populating TME, which can initially exert an anti-tumoral effect, but with time actively participate in disease progression. Macrophages, dendritic cells, neutrophils, myeloid-derived suppressor cells, mast cells, eosinophils, and basophils act alone or in concert to shape tumor cells resistance through cellular interaction and/or release of soluble factors favoring survival, proliferation, and migration of tumor cells, but also immune-escape and therapy resistance.
Insights
Myeloid cells in the tumor microenvironment (TME) initially fight cancer but later promote tumor growth and resistance. Understanding these myeloid cells is key for developing new cancer therapies.
Area of Science:
- Oncology
- Immunology
- Cell Biology
Background:
- Malignant cell interactions with stromal and immune cells are crucial for cancer progression.
- Novel therapies targeting these cells have transformed cancer treatment.
- Understanding individual cell roles within the tumor microenvironment (TME) is essential.
Purpose of the Study:
- To review the role of the myeloid cell compartment within the TME.
- To elucidate how myeloid cells influence cancer progression and therapy resistance.
Main Methods:
- Literature review focusing on myeloid cell populations in the TME.
- Analysis of cellular interactions and soluble factors mediating myeloid cell functions.
Main Results:
- Myeloid cells, initially anti-tumoral, become pro-tumoral during cancer progression.
- Specific myeloid populations (macrophages, dendritic cells, neutrophils, MDSCs, mast cells, eosinophils, basophils) contribute to tumor growth and immune evasion.
- These cells promote tumor cell survival, proliferation, migration, and therapy resistance.
Conclusions:
- Myeloid cells are key players in shaping the TME and influencing cancer outcomes.
- Targeting specific myeloid cell functions presents a promising strategy for overcoming treatment resistance.
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