mTOR Signaling and Macrophage Phagocytosis of Cancer Cells
Author Information
Author(s): Wang Bixin, Cao Xu, Garcia-Mansfield Krystine, Zhou Jingkai, Manousopoulou Antigoni, Pirrotte Patrick, Wang Yingyu, Wang Leo D., Feng Mingye, Vallera Daniel A.
Primary Institution: City of Hope
Hypothesis
The study investigates the role of mTOR signaling in sustaining macrophage phagocytosis of cancer cells.
Conclusion
mTOR signaling is crucial for the sustained phagocytosis of cancer cells by macrophages, and its inhibition impairs this process.
Supporting Evidence
- mTOR signaling is activated after the initiation of phagocytosis.
- Inhibition of mTOR impairs macrophage phagocytic capacity without affecting affinity.
- Phagosome acidification is regulated by mTOR signaling during phagocytosis.
- Phosphoproteomic analysis identified significant changes in macrophage signaling during phagocytosis.
- Macrophages can transition from non-phagocytic to phagocytic states with mTOR signaling.
- Blocking CD47 enhances phagocytosis of cancer cells by macrophages.
- Rapamycin treatment reduces the phagocytic capacity of macrophages.
Takeaway
Macrophages, which are immune cells, need a specific signal called mTOR to keep eating cancer cells. If we block this signal, they can't eat as well.
Methodology
The study used phosphoproteomic profiling to analyze macrophage signaling during phagocytosis of cancer cells.
Statistical Information
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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