Abstract
Infection with RNA viruses presents a typical pattern of virus products, double-stranded RNA (dsRNA), and induces the maturation of antigen-presenting dendritic cell (mDC). There are several dsRNA sensors that are differentially distributed on the cell membrane and in the cytoplasm and are variably expressed depending on the cell type. Among these sensors, TLR3 links to the adaptor TICAM-1 (TRIF), which is characterized by its unique multipronged signaling cascades for cytokine/chemokine production, apoptosis and autophagy in both immune and tumor cells. In the context of mDC maturation, various cellular events are further induced in response to dsRNA; these include cross-priming followed by CD8+ CTL induction, NK activation and proliferation of CD4+ T cells including Th1, Th2, Treg and Th17 cells. In this review, we focus on the potential role of dsRNA in modulating the inflammatory milieu around mDCs and tumor-associated antigens to drive specific cellular effectors against the tumor.
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Acknowledgments
We are grateful to our laboratory members for their critical discussions. This work was supported in part by CREST, JST (Japan Science and Technology Corporation), and by Grants-in-Aid from the Ministry of Education, Science, and Culture (Specified Project for Advanced Research) and the Ministry of Health, Labor, and Welfare of Japan, and by the Takeda Science Foundation, Uehara memorial Foundation, Northtec Foundation, Akiyama Foundation, Yakult foundation and Mitsubishi Foundation. Financial supports by the Sapporo Biocluster “Bio-S” the Knowledge Cluster Initiative of the MEXT, and the Program of Founding Research Centers for Emerging and Reemerging Infectious Diseases, MEXT are gratefully acknowledged.
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Seya, T., Matsumoto, M. The extrinsic RNA-sensing pathway for adjuvant immunotherapy of cancer. Cancer Immunol Immunother 58, 1175–1184 (2009). https://doi.org/10.1007/s00262-008-0652-9
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DOI: https://doi.org/10.1007/s00262-008-0652-9