TRPM2 Mediates Neutrophil Killing of Disseminated Tumor Cells

Neutrophils play a critical role in cancer, with both protumor and antitumor neutrophil subpopulations reported. The antitumor neutrophil subpopulation has the capacity to kill tumor cells and limit metastatic spread, yet not all tumor cells are equally susceptible to neutrophil cytotoxicity. Becaus...

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Published in:Cancer research (Chicago, Ill.) Ill.), 2018-05, Vol.78 (10), p.2680-2690
Main Authors: Gershkovitz, Maya, Caspi, Yaki, Fainsod-Levi, Tanya, Katz, Ben, Michaeli, Janna, Khawaled, Saleh, Lev, Shaya, Polyansky, Lola, Shaul, Merav E, Sionov, Ronit V, Cohen-Daniel, Leonor, Aqeilan, Rami I, Shaul, Yoav D, Mori, Yasuo, Karni, Rotem, Fridlender, Zvi G, Binshtok, Alexander M, Granot, Zvi
Format: Article
Language:English
Subjects:
Calcium
Calcium ions
Cancer
Cell proliferation
Cytotoxicity
Hydrogen peroxide
Leukocytes (neutrophilic)
Lungs
Metastases
Metastasis
Neutrophils
Secretion
Subpopulations
Transient receptor potential proteins
Tumor cells
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Summary:Neutrophils play a critical role in cancer, with both protumor and antitumor neutrophil subpopulations reported. The antitumor neutrophil subpopulation has the capacity to kill tumor cells and limit metastatic spread, yet not all tumor cells are equally susceptible to neutrophil cytotoxicity. Because cells that evade neutrophils have greater chances of forming metastases, we explored the mechanism neutrophils use to kill tumor cells. Neutrophil cytotoxicity was previously shown to be mediated by secretion of H O We report here that neutrophil cytotoxicity is Ca dependent and is mediated by TRPM2, a ubiquitously expressed H O -dependent Ca channel. Perturbing TRPM2 expression limited tumor cell proliferation, leading to attenuated tumor growth. Concomitantly, cells expressing reduced levels of TRPM2 were protected from neutrophil cytotoxicity and seeded more efficiently in the premetastatic lung. These findings identify the mechanism utilized by neutrophils to kill disseminated tumor cells and to limit metastatic spread. .
ISSN:0008-5472
1538-7445
DOI:10.1158/0008-5472.can-17-3614