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Regulation of immune responses and CD40 signal

Research Project

Project/Area Number 11470087
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section一般
Research Field Immunology
Research InstitutionOsaka University

Principal Investigator

KIKUTANI Hitoshi  Osaka Univ., Res.Inst.Microbial Diseases, Prof., 微生物病研究所, 教授 (80161412)

Co-Investigator(Kenkyū-buntansha) KUMANOGOH Atsushi  Osaka Univ., Res.Inst.Microbial Diseases, Assist.Prof., 微生物病研究所, 助手 (10294125)
YOSHIDA Kenji  Osaka Univ., Res.Inst.Microbial Diseases, Assist.Prof., 微生物病研究所, 助手 (80294122)
安居 輝人  大阪大学, 微生物病研究所, 助手 (60283074)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥14,800,000 (Direct Cost: ¥14,800,000)
Fiscal Year 2000: ¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 1999: ¥9,200,000 (Direct Cost: ¥9,200,000)
KeywordsCD100 / CD40 signal / LPS / semaphorin / CD100 deficient mouse / T cell / CD72 / SHP1 / トランスジェニックマウス / EB-ウイルス / LMP1
Research Abstract

1) CD40 was found to play a role in LPS responses in a ligand-independent manner because macrophages and B cells from CD40-deficient mice but not from CD40 ligand-deficient mice displayed impaired responses to LPS.Biochemical studies revealed that CD40 was associated with TLR4 upon stimulation with LPS, suggesting that CD40 is involved in LPS signaling as one of LPS receptor components.
2) CD100 was found to induce dephosphorylation of its lymphocyte receptor, CD72, and dissociation of a tyrosine phosphatase, SHP1 from CD72. This finding indicates that CD100 turns off negative signaling of CD72, resulting in augmentation of B cell activation.
3) CD100-deficient mice showed not only poor B cell responses but also impaired T cell priming. Furthermore, it was found that impaired T cell priming was due to a defect of activation of antigen presenting cells such as dendritic cells in the absence of CD100.
4) We demonstrated that CD100 was proteolytically cleaved and released from T and B cells as functional soluble CD100 upon activation of cells. Serum levels of soluble CD100 increased after immunization of normal mice or after the onset of autoimmune diseases of MRL/lpr mice. Furthermore, serum levels of soluble CD100 were found to well correlate with titers of specific antibodies or titers of auto-antibodies in these mice.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Kumanogoh,A.,H.Kikutani, et al.: "Identification of CD72 as a lymphocyte receptor for the class IV semaphorin CD100 : A novel mechanism for regulating B cell signaling."Immunity. 13. 621-631 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shi,W.,A.Kumanogoh,H.Kikutani, et al.: "The class IV semaphorin CD100 plays a nonredundant role in the immune system : Defective B and T cell activation in CD100-deficient mice."Immunity. 13. 633-642 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yoshida,Ke.,and H.Kikutani: "Genetics and immunological basis of autoimmune diabetes in the NOD mouse."Rev.in Immunogenetics. 2. 140-146 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Wakayama,H.,H.Kikutani, et al.: "Abolition of anti-glomerular basement membrane antibody-mediated glomerulonephritis in FcRγ-deficient mice."Eur.J.Immunol.. 30. 1182-1190 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kumanogoh,A.,H.Kikutani, et al.: "Increased T-cell autoreactivity in the absence of CD40-CD40 ligand interactions : A role of CD40 in regulatory T cell development."J.Immunol.. 166. 353-360 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Wang,X.-O.,A.Kumanogoh,H.Kikutani, et al.: "Functional soluble CD100/Sema4D released from activated lymphocytes : Possible role in normal and pathological immune responses."Blood. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kumanogoh, A., H.Kikutani, et al.: "Identification of CD72 as a lymphocyte receptor for the class IV semaphorin CD100 : A novel mechanism for regulating B cell signaling."Immunity. 13. 621-631 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shi, W., A.Kumanogoh, H.Kikutani, et al.: "The class IV semaphorin CD100 plays a nonredundant role in the immune system : Defective B and T cell activation in CD100-deficient mice."Immunity. 13. 633-642 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yoshida, Ke., and H.Kikutani.: "Genetics and immunological basis of autoimmune diabetes in the NOD mouse."Rev.in Immunogenetics. 2. 140-146 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Wakayama, H., H.Kikutani, et al.: "Abolition of anti-glomerular basement membrane antibody-mediated glomerulonephritis in FcRγ-deficient mice."Eur.J.Immunol.. 30. 1182-1190 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kumanogoh, A., H.Kikutani, et al.: "Increased T-cell autoreactivity in the absence of CD40-CD40 ligand interactions : A role of CD40 in regulatory T cell development."J.Immunol.. 166. 353-360 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Wang, X.-S.., A.Kumanogoh, H.Kikutani, et al.: "Functional soluble CD100/Sema4D released from activated lymphocytes : Possible role in normal and pathological immune responses."Blood. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kumanogoh,A.,H.Kikutani, et al.: "Identification of CD72 as a lymphocyte receptor for the class IV semaphorin CD100 : A novel mechanism for regulating B cell signaling."Immunity. 13. 621-631 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Shi,W.,A.Kumanogoh,H.Kikutani, et al.: "The class TV semaphorin CD100 plays a nonredundant role in the immune system : Defective B and T cell activation in CD100-deficient mice."Immunity. 13. 633-642 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yoshida,Ke.,and H.Kikutani: "Genetics and immunological basis of autoimmune diabetes in the NOD mouse."Rev.in Immunogenetics. 2. 140-146 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Wakayama,H.,H.Kikutani, et al.: "Abolition of anti-glomerular basement membrane antibody-mediated glomerulonephritis in FcRγ-deficient mice."Eur.J.Immunol.. 30. 1182-1190 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kumanogoh,A.,H.Kikutani, et al.: "Increased T cell autoreactivity in the absence of CD40-CD40 ligand interactions : A role of CD40 in regulatory T cell development."J.Immunol.. 166. 353-360 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Wang,X.-O.,A.Kumanogoh,H.Kikutani, et al.: "Functional soluble CD100/Sema4D released from activated lymphocytes : Possible role in normal and pathological immune responses."Blood. (in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yu.P.,H.Kikutani他: "CD40-deficient mice infected with the defective murine--"Eur.J.Immunol.. 29. 615-625 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Korgano,A-S他: "From systemic T cell self-reactivity to organ-specific--"Immunity. 10. 451-461 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Imaizumi,K.他: "Enhancement of tumoricidal activity of alveolar---"Am.J.Physiol.. 277. 49-57 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Pound,J.D.H他: "Minimal cross-linking and epitope requirements for---"Int.Immunol.. 11. 11-20 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Uchida,J.他: "Mimicry of CD40 signals by Epstein-Barr virus LMP1 in--"Science. 286. 300-303 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Ozaki,M.E.他: "CD40+ T cell responses to CD40-deficient APCs : defects--"J.Immunol.. 163. 5250-5256 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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