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炎症性細胞に特有の新しいTLR9制御機構の解明

Research Project

Project/Area Number 21390123
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Experimental pathology
Research InstitutionResearch Institute, International Medical Center of Japan

Principal Investigator

反町 典子  独立行政法人国立国際医療研究センター, その他 (30217468)

Co-Investigator(Kenkyū-buntansha) 笹渡 繁巳  独立行政法人国立国際医療研究センター, 消化器疾患研究部・消化器免疫研究室, 研究員 (30450597)
Project Period (FY) 2009 – 2010
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2011: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2010: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2009: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
KeywordsTLR9 / Solute carrier family 15A4 / NOD1 / cytokine / lysosome / histidine / colitis / TLR / 抑制性レセプター / 樹状細胞
Research Abstract

樹状細胞やマクロファージは、外来異物の認識・取込みと抗原提示、サイトカイン産生を介して免疫応答の惹起に根幹的な役割を果たしている。これらの細胞は、Toll like receptor (TLR)を介して微生物由来成分を認識するが、TLRを介したシグナル伝達の制御機構は不明な点が多い。本研究は、樹状細胞やマクロファージに優先的に発現する抑制性レセプターLy49Qによる新規TLR9のシグナル制御機構を明らかにし、さらにその制御破たんがプラスマ樹状細胞およびマクロファージの機能にどのような影響を及ぼすかを明らかにすることを目的とした。
Ly49Qに会合するチロシンフォスファターゼSHP1およびSHP2の種々の変異体を用いて、これらのフォスファターゼがLy49QによるTLR9シグナルの制御に重要な役割を果たすことを明らかにした。
また、Ly49Q欠損マウスを用いて、TLR9刺激存在下におけるプラスマ樹状細胞の生存にLy49Qが重要な役割を果たすことを明らかにした。Ly49Q欠損プラスマ樹状細胞では、TLR9刺激存在下で細胞死が認められた。この細胞死はカテプシンおよびカスパーゼ阻害剤で細胞死が抑制されたことから、ピロトーシス様細胞死であることが強く示唆された。さらにTLR9刺激存在下では、Ly49Q欠損プラスマ樹状細胞でライソゾーム内カテプシンの細胞質への浸出が認められ、さらにIL-1 の産生が亢進することから、Ly49Q欠損によってプラスマ樹状細胞のライソゾームの不安定化が引き起こされることが強く示唆され、Ly49Qがライソゾームの品質管理に関わる可能性が示された。

Report

(2 results)
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (20 results)

All 2011 2010 2009 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (12 results) Remarks (1 results)

  • [Journal Article] The solute carrier family 15A4 regulates TLR9 and NOD1 functions in the innate immune system and promotes colitis in mice.2011

    • Author(s)
      Sasawatari, S., et al.
    • Journal Title

      Gastroenterology

      Volume: 140 Pages: 1513-1525

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The innate immune system in host mice targets cells with allogenic mitochondrial DNA.2010

    • Author(s)
      Ishikawa, K., et al.
    • Journal Title

      J.Exp.Med

      Volume: 207 Pages: 2297-2305

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dynamic distribution of muscle-specific calpain in mice has a key role in physical-stress adaptation and is impaired in muscular dystrophy.2010

    • Author(s)
      Ojima, K., et al.
    • Journal Title

      J Clin Invest.

      Volume: 120 Pages: 2672-2683

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Calpain 8/nCL-2 and calpain 9/nCL-4 constitute an active protease complex, G-calpain, involved in gastric mucosal defense.2010

    • Author(s)
      Hata, S., et al.
    • Journal Title

      PLoS Genetics

      Volume: 6

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ly49Q plays a crucial role in neutrophil polarization and migration by regulating raft trafficking2010

    • Author(s)
      Sasawatari, S, Yoshizaki, M, Taya C., et al.
    • Journal Title

      Immunity 32

      Pages: 200-213

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ly49Q, an ITIM-bearing NK receptor, positively regulates osteoclast differentiation2010

    • Author(s)
      Hayashi M, Nakashima T, Kodama T, et al.
    • Journal Title

      Biochem Biophys Res Commun. 393

      Pages: 432-438

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spatiotemporal regulation of intracellular trafficking of TLR9 by an inhibitory receptor, Ly49Q2009

    • Author(s)
      Yoshizaki M., Tazawa A., Kasumi E., et al.
    • Journal Title

      BLOOD 114

      Pages: 1518-1527

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] 抑制性レセプター-Ly49QによるTLR9シグナル制御機構2010

    • Author(s)
      反町典子, 他
    • Organizer
      第6回血液学若手研究者勉強会(麟麟塾)
    • Place of Presentation
      東京
    • Year and Date
      2010-06-05
    • Related Report
      2010 Annual Research Report
  • [Presentation] 自然免疫制御におけるSLC15A4の重要性2010

    • Author(s)
      笹渡繁巳、反町典子
    • Organizer
      第19回東京免疫フォーラム
    • Place of Presentation
      東京
    • Year and Date
      2010-02-24
    • Related Report
      2009 Annual Research Report
  • [Presentation] アロミトコンドリアに対する自然免疫応答2010

    • Author(s)
      今西泰赳、反町典子
    • Organizer
      第19回東京免疫フォーラム
    • Place of Presentation
      東京
    • Year and Date
      2010-02-24
    • Related Report
      2009 Annual Research Report
  • [Presentation] A crucial role of Ly49Q in neutrophil polarization and migration by regulating raft trafficking.2010

    • Author(s)
      Sasawatari, S., et al.
    • Organizer
      12^<th> Meeting of the Society for Natural Immunity
    • Place of Presentation
      Croatia
    • Related Report
      2010 Annual Research Report
  • [Presentation] Ly49Q regulates intracellular trafficking of TLR9/CpG.2010

    • Author(s)
      Yoshizaki, M., et al.
    • Organizer
      12^<th> Meeting of the Society for Natural Immunity
    • Place of Presentation
      Croatia
    • Related Report
      2010 Annual Research Report
  • [Presentation] Ly49Q plays a crucial role in neutrophil polarization and migration by regulating raft trafficking.2010

    • Author(s)
      Sasawatari, S., et al.
    • Organizer
      14th International Congress of Immunology
    • Place of Presentation
      神戸
    • Related Report
      2010 Annual Research Report
  • [Presentation] An inhibitory receptor, Ly49Q regulates intracellular trafficking of TLR9 and type I IFN production.2010

    • Author(s)
      Yoshizaki, M., et al.
    • Organizer
      14th International Congress of Immunology
    • Place of Presentation
      神戸
    • Related Report
      2010 Annual Research Report
  • [Presentation] アロ由来ミトコンドリアDNAに対する自然免疫応答2010

    • Author(s)
      今西泰赳, 他
    • Organizer
      BMB2010(第33回日本分子生物学会年会・第83回日本生化学会大会 合同大会)
    • Place of Presentation
      神戸
    • Related Report
      2010 Annual Research Report
  • [Presentation] The innate immune system in host mice targets cells with allogenic mitochondrial DNA.2010

    • Author(s)
      Imanishi, H., et al
    • Organizer
      7th ASMRM (Asian symposium of Mitochondrial Research and Medicine) and 10th J-mit (Japanese Mitochondrial Research and Medicine)
    • Place of Presentation
      Fukuoka
    • Related Report
      2010 Annual Research Report
  • [Presentation] A crucial role of Ly49Q-mediated dynamic regulation of lipid rafts in neutrophils2009

    • Author(s)
      笹渡繁巳
    • Organizer
      第39回日本免疫学会総会・学術集会
    • Place of Presentation
      大阪
    • Related Report
      2009 Annual Research Report
  • [Presentation] An inflammatory cell-specific regulatory mechanism of lipid rafts mediated by Ly49Q and MHC class I2009

    • Author(s)
      吉崎真理子
    • Organizer
      第39回日本免疫学会総会・学術集会
    • Place of Presentation
      大阪
    • Related Report
      2009 Annual Research Report
  • [Presentation] Spatiotemporal regulation of intracellular trafficking of TLR9 by an inhibitory receptor, Ly49Q2009

    • Author(s)
      吉崎真理子
    • Organizer
      The First International Kishimoto Foundation Symposium "Immune Regulation : Present and Future"
    • Place of Presentation
      大阪
    • Related Report
      2009 Annual Research Report
  • [Remarks]

    • URL

      http://www.ncgm.go.jp/rese/top/j/rese_MolePro.html

    • Related Report
      2010 Annual Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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