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Analysis of pathogen recognition by TLR4 and RP105 and their application to immunothrapy

Research Project

Project/Area Number 13470073
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Immunology
Research InstitutionSaga University (2004)
佐賀医科大学 (2001-2003)

Principal Investigator

KIMOTO Masao  Saga University, Medicine, Professor, 医学部, 教授 (40153225)

Co-Investigator(Kenkyū-buntansha) NAGASAWA Kouhei  Saga University, Medicine, Professor, 医学部, 教授 (00108721)
MIYAKE Kensuke  The University of Tokyo, The Institute of Medical Science, Professor, 医科学研究所, 教授 (60229812)
Project Period (FY) 2001 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2004: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2003: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2002: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2001: ¥5,200,000 (Direct Cost: ¥5,200,000)
KeywordsMD-2 / recombinant protein / bacterial expression / CD14 / LBP / ligand / LPS / cytokine / リコンピナント蛋白 / TLR4 / RP105 / 川崎病 / アイソフォーム / 融合蛋白 / 変異蛋白 / MD-1 / SLE / 自己抗体 / CHO / ノックアウト / キメラ蛋白 / トランスフェクタント
Research Abstract

1.Analysis of the TLR and RP105 molecular structure : We obtained highly purified form of recombinant bacterial products of MD-2,CD14 and LBP. Using these purified proteins, we analyzed thier critical structures for binding to LPS. We also revealed the differential binding of CD14 and MD-2 to LPS.
2.Analysis of TLR4 and RP105 ligands : We found that MD-2 directly binds to LPS. On the other hand, MD-1 was found not to bind LPS directly, although LPS can signal through RP105/MD-1 molceule. We compared the LPS binding pattern between MD-1 and MD-2 using their site-specific mutant molecules.
3.Role of TLR4 and RP105 in immunological diseases : We found increased frequency of RP105-negative B cells in SLE patients. Culture of RP105-negative B cells resulted in the secretion of IgG and IgM, the production of these were augmented by SAC or IL-6 stimulation. RP105-negative B cells from SLE patients produced dsDNA antibodies. These results suggest that RP105-negative B cells are in an activated state and possibly involved in the production of auto-antibodies.
4.Manipulation of TLR4 and RP105 signal transduction : We found alternative spliced forms of MD-2 by RT-PCR. Such alternative form of MD-2 molecules may potentially function as dominant negative molecules for TLRA/MD-2 signaling, and may function as a potential tool for the manipulation of LPS signaling. We also obtained monoclonal antibodies against TLRA/MD-2. This mAb was found to transmit activation signals through TLRA/MD-2 and resulted in the secretion of pro-inflammatory cytokines.

Report

(5 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (34 results)

All 2005 2004 2003 2002 2001 Other

All Journal Article (16 results) Publications (18 results)

  • [Journal Article] The functional and structural properties of MD-2 required for lipopolysaccharide binding are abasent in MD-1.2005

    • Author(s)
      Tsuneyoshi N
    • Journal Title

      J.Immunol. 174

      Pages: 340-344

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] The functional and structural properties of MD-2 required for lipopolysaccharide binding are absent in MD-1.2005

    • Author(s)
      Tsuneyoshi N
    • Journal Title

      J Immunol. 174

      Pages: 340-344

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Identification of a novel isoform of MD-2 that downreglates lipopolysaccharide signaling.2004

    • Author(s)
      Ohta S
    • Journal Title

      Biochem.Biophys.Res.Commun. 323

      Pages: 1103-1108

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Identification of a novel isoform of MD-2 that downregulates lipopolysaccharide signaling.2004

    • Author(s)
      Ohta S
    • Journal Title

      Biochem.Biophys.Res.Commun. 323

      Pages: 1103-1108

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Identification of a novel isoform of MD-2 that downregulates lipopolysaccharide signaling.2004

    • Author(s)
      Ohta S
    • Journal Title

      Biochem Biophys Res Commun 323

      Pages: 1103-1108

    • Related Report
      2004 Annual Research Report
  • [Journal Article] MD-2のLPS結合におけるヒトとマウスの違い2004

    • Author(s)
      常吉 直子
    • Journal Title

      日本免疫学会総会誌 34

      Pages: 48-48

    • Related Report
      2004 Annual Research Report
  • [Journal Article] マウスTLR4単独認識モノクローナル抗体の樹立2004

    • Author(s)
      太田 昭一郎
    • Journal Title

      日本免疫学会総会誌 34

      Pages: 49-49

    • Related Report
      2004 Annual Research Report
  • [Journal Article] シグナル誘導型抗マウスTLR4/MD-2モノクローナル抗体の樹立2004

    • Author(s)
      Bahrun Uleng
    • Journal Title

      日本免疫学会総会誌 34

      Pages: 49-49

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 大腸菌によるCD14の発現と機能解析2004

    • Author(s)
      小原 潤
    • Journal Title

      日本免疫学会総会誌 34

      Pages: 53-53

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Role of TLR4/MD-2 and RP105/MD-1 in innate recognition of lipopolysaccharide.2003

    • Author(s)
      Kimoto M
    • Journal Title

      Scand.J.Infect.Dis. 35(9)

      Pages: 568-572

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Essential role of MD-2 in LPS responsiveness and TLR4 distribution2002

    • Author(s)
      Nagai Y
    • Journal Title

      Nat Immunol. 7

      Pages: 667-672

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Requirement for MD-1 in cell surface expression of RP105/CD180 and B-cell responsiveness to lipopolysaccharide.2002

    • Author(s)
      Nagai Y
    • Journal Title

      Blood 99

      Pages: 1699-1705

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Essential role of MD-2 in LPS responsiveness and TLR4 distribution.2002

    • Author(s)
      Nagai Y
    • Journal Title

      Nat Immunol. 7

      Pages: 667-672

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Requirement for MD-1 in cell surface expression of RP105/CD180 and B-cell responsiveness to lipopolysaccharide.2002

    • Author(s)
      Nagai Y
    • Journal Title

      Blood. 99

      Pages: 1699-1705

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Difference in B cell activation between dermatomyositis and polymyositis : analysis of the expression of RP 105 on peripheral blood B cells.:,2001.2001

    • Author(s)
      Kikuchi Y
    • Journal Title

      Ann.Rheum.Dis. 60

      Pages: 1137-1140

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Difference in B cell activation between dermatomyositis and polymyositis : analysis of the expression of RP 105 on peripheral blood B cells.2001

    • Author(s)
      Kikuchi Y
    • Journal Title

      Ann.Rheum.Dis. 60

      Pages: 1137-1140

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Kimoto M: "Role of TLR4/MD-2 and RP105/MD-1 in innate recognition of lipopolysaccharide."Scand J Infect Dis. 35. 568-572 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 福留健司: "MD-2蛋白の大腸菌での発現"日本免疫学会総会誌. 33. 126 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 太田昭一郎: "MD-2アイソフォームによるLPSシグナル制御"日本免疫学会総会誌. 33. 121 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 常吉直子: "CHO細胞でのMD-1の発現とその構造解析"日本免疫学会総会誌. 33. 124 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Tsuneyoshi N: "Expression of MD-1 protein in CHO cells."生化学. 75. 873 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kikuchi Y: "RP105-lacking B cells from lupus patients are responsible for the production of immunoglobulins and autoantibodies"Arthritis. Rheum.. 46(12). 3259-3265 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nagai Y: "Essential role of MD-2 in LPS responsiveness and TLR4 distribution"Nature Immunology. 7. 667-672 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nagai Y: "Requirement for MD-1 in cell surface expression of RP105/CD180 and B-cell responsiveness to lipopolysaccharide"Blood. 99. 1699-1705 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 楠本豊: "抗マウスTLR9モノクローナル抗体の樹立"日本免疫学会総会誌. 32. 29 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 長井良憲: "RP105の発現制御と新たなRP105会合分子の検索"日本免疫学会総会誌. 32. 29 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 常吉直子: "血管内皮プロテインCレセプター(EPCR)とトロンボモジュリン(TM)の会合"生化学. 74. 215 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 木本雅夫: "免疫学コア講義"南山堂. 52 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Tsuneyoshi N: "Expression and anticoagulant function of the endothelial cell protein C receptor(EPCR) in cancer cell lines"Thromb Haemost. 85(2). 356-361 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Akashi S: "Human MD-2 confers on mouse Toll-like receptor 4 species-specific lipopolysaccharide recognition"Int Immunol. 13. 1595-1599 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nagai Y: "Requirement for MD-1 in cell surface expression of RP105/CD180 and B cell responsiveness to lipopolysaccharide"Blood. (in press).

    • Related Report
      2001 Annual Research Report
  • [Publications] Miyake K: "Innate recognition of lipopolysaccharide by Toll-like receptor 4/MD-2 and RP1O5/MD-1"J Endotoxin Res. 6(5). 389-391 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 赤司 祥子: "TLR4を介するLPSシグナリングにおけるMD-2の役割"第31回目本免疫学会総会誌. 31. 232 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 赤司 祥子: "Toll-like receptorを介するLPS認識におけるMD-2の役割"第60回日本癌学会総会Program. 135 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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