2013 Fiscal Year Final Research Report
Spatiotemporal regulation of nucleic acid uptake and signaling
Project/Area Number |
23590558
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Immunology
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Research Institution | Hokkaido University |
Principal Investigator |
MATSUMOTO Misako 北海道大学, 医学(系)研究科(研究院), 特任准教授 (30332456)
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Co-Investigator(Renkei-kenkyūsha) |
SEYA Tsukasa 北海道大学, 大学院医学研究科, 教授 (10301805)
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Project Period (FY) |
2011 – 2013
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Keywords | 自然免疫 / Toll-like receptor / エンドソーム / 樹状細胞 / RNA認識 / ウイルス感染 / 炎症応答 / マクロファージ |
Research Abstract |
Endosomal Toll-like receptor (TLR) 3 serves as a sensor of viral infection and sterile tissue necrosis and activates innate and adaptive immunity. Although TLR3 recognizes double-stranded (ds) RNA, little is known about structural features of virus- or host-derived RNAs that activate TLR3 in infection/inflammatory states. In this study, we demonstrate that single-stranded RNAs harboring stable incomplete stem structures are potent TLR3 agonists. Like poly(I:C), a synthetic dsRNA, these structured RNAs were internalized into cells via raftlin-mediated endocytosis and activated TLR3. Based on the ligand recognition mode of TLR3 and uptake mechanism of extracellular nucleic acids, we have generated novel TLR3 ligand that activates endosomal TLR3 but not cytoplasmic RNA sensors.
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[Journal Article] Structures and interface mapping of the TIR-domain-containing adaptor molecules involved in interferon signaling2013
Author(s)
Enokizono, Y., H. Kumeta, K. Funami, M. Horiuchi, J. Sarmiento, K. Yamashita, D. Standley, M. Matsumoto, T. Seya, and F. Inagaki.
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Journal Title
Proc. Natl. Acad. Sci. U. S. A.
Volume: 110(49)
Pages: 19908-19913
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[Journal Article] Cleaved/associated TLR3 represents the primary form of the signaling receptor2013
Author(s)
Toscano F., Y. Estornes, F. Virard, A. Garcia-Cattaneo, A. Pierrot, B. Vanbervliet, M. Bonnin, M. J. Ciancanelli, S-Y. Zhang, K. Funami, T. Seya, M. Matsumoto, J-J. Pin, J-L. Casanova, T. Renno, and S. Lebecque.
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Journal Title
J Immunol
Volume: 190(2)
Pages: 764-773
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[Journal Article] Complement C1q activates canonical Wnt signaling and promotes aging-related phenotypes2012
Author(s)
Naito, A. T., T. Sumida, S. Nomura, M-L Liu, T. Higo, K. A. Nakagawa, Okada, T. Sakai, A. A. Hashimoto, Y. Hara, I. Shimizu, W. Zhu, H. Toko, A. Katada, H. Akazawa, T. Oka, J-K. Lee, T. Minamino, T. Nagai, K. Walsh, A. Kikuchi, M. Matsumoto, M. Botto, I. Shiojima, and I. Komuro.
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Journal Title
Cell
Volume: 149(6)
Pages: 1298-1313
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[Journal Article] Phosphoinositide 3-kinaseg controls the intracellular localization of CpG to limit DNA-PKcs-dependent IL-10 production in macrophages2011
Author(s)
Hazeki, K., Y. Kametani, H. Murakami, M. Uehara, Y. Ishikawa, K. Nigorokawa, S. Takasuga, T. Sasaki, T. Seya, M. Matsumoto, and O. Hazeki.
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Journal Title
PLoS ONE
Volume: 6 (10)
Pages: e26836
DOI
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[Book] Jesus Giraldo, editors : Oligomerization in Health and Disease, Vol 117, PMBTS, UK, Toll-IL-1-receptor-containing adaptor molecule-1 (TICAM-1), a signaling adaptor linking innate immunity to adaptive immunity2013
Author(s)
Matsumoto, M., K. Funami, H. Oshiumi, and T. Seya.
Total Pages
485-510
Publisher
Academic Press