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</script>p53-dependent chemokine production by senescent tumor cells supports NKG2D-dependent tumor elimination by natural killer cells
p53-dependent chemokine production by senescent tumor cells supports NKG2D-dependent tumor elimination by natural killer cells
The induction of cellular senescence is an important mechanism by which p53 suppresses tumorigenesis. Using a mouse model of liver carcinoma, where cellular senescence is triggered in vivo by inducible p53 expression, we demonstrated that NK cells participate in the elimination of senescent tumors. The elimination of senescent tumor cells is dependent on NKG2D. Interestingly, p53 restoration neither increases ligand expression nor increases the sensitivity to lysis by NK cells. Instead, p53 restoration caused tumor cells to secrete various chemokines with the potential to recruit NK cells. Antibody-mediated neutralization of CCL2, but not CCL3, CCL4 or CCL5, prevented NK cell recruitment to the senescent tumors and reduced their elimination. Our findings suggest that elimination of senescent tumors by NK cells occurs as a result of the cooperation of signals associated with p53 expression or senescence, which regulate NK cell recruitment, and other signals that induce NKG2D ligand expression on tumor cells.
- University of California, Berkeley United States
- University of California System United States
- UNIVERSITY OF CALIFORNIA BERKELEY
- Memorial Sloan Kettering Cancer Center United States
- University of California at Berkeley, Department of Molecular and Cell Biology United States
Cytotoxicity, Immunologic, Cytotoxicity, Knockout, Immunology, Ligands, Medical and Health Sciences, Article, Cell Line, Mice, Immunologic, Cell Line, Tumor, Neoplasms, 2.1 Biological and endogenous factors, Killer Cells, Animals, Aetiology, Cellular Senescence, Chemokine CCL2, Cancer, Mice, Knockout, Tumor, Liver Disease, Killer Cells, Natural, NK Cell Lectin-Like Receptor Subfamily K, Natural, Chemokines, Tumor Suppressor Protein p53, Digestive Diseases
Cytotoxicity, Immunologic, Cytotoxicity, Knockout, Immunology, Ligands, Medical and Health Sciences, Article, Cell Line, Mice, Immunologic, Cell Line, Tumor, Neoplasms, 2.1 Biological and endogenous factors, Killer Cells, Animals, Aetiology, Cellular Senescence, Chemokine CCL2, Cancer, Mice, Knockout, Tumor, Liver Disease, Killer Cells, Natural, NK Cell Lectin-Like Receptor Subfamily K, Natural, Chemokines, Tumor Suppressor Protein p53, Digestive Diseases
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