Abstract
The innate immune sensing pathways play critical roles in the defense against pathogen infection, but their roles in cancer immunosurveillance and cancer therapies are less defined. We propose that defective innate immune sensing inside the tumor microenvironment might limit T-cell responses to immunotherapy. A recent mechanistic understanding of conventional therapies revealed that both innate immune sensing and T-cell responses are essential for optimal antitumor efficacy. T-cell-based immunotherapy, particularly immune checkpoint blockade, has achieved great success in reactivating antitumor immune responses to lead to tumor regression, but only in a small fraction of patients. Therefore, incorporating conventional therapy that can increase innate sensing and immunotherapy should lead to promising strategies for cancer patients. Here, we review the innate sensing pathways related to cancer initiation/progression and therapies, summarize the recent key findings in innate immune sensing related to conventional therapies, evaluate current combination strategies, and highlight the potential issues of combinational therapies in terms of antitumor efficacy and toxicities.
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Acknowledgements
We thank Casey Moore for helpful editing and discussions. Y.-X.F. holds the Mary Nell and Ralph B. Rogers Professorship in Immunology. This work was supported in part by Texas CPRIT grants RP180725 and RR150072 (CPRIT scholar in Cancer Research) to Y.-X.F.
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Liu, Z., Han, C. & Fu, YX. Targeting innate sensing in the tumor microenvironment to improve immunotherapy. Cell Mol Immunol 17, 13–26 (2020). https://doi.org/10.1038/s41423-019-0341-y
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DOI: https://doi.org/10.1038/s41423-019-0341-y
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