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1995 Fiscal Year Final Research Report Summary

The roles of deltagamma T cells in host defense mechanism

Research Project

Project/Area Number 06044102
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionNagoya University

Principal Investigator

YOSIKAI Yasunobu  Nagoya University, School of Medicine, 医学部, 教授 (90158402)

Co-Investigator(Kenkyū-buntansha) BLUESTONE Je  シカゴ大学, ベンメイ研究所, 教授
HIROMATSU Kenji  Nagoya University, School of Medicine, 医学部, 助手 (80252237)
BLUESTONE Jeffrey a.  The Ben May Institute, THe University of Chicago
Project Period (FY) 1994 – 1995
Keywordsgammadelta T cells / IL-15 / Bacterial intection / Pregnant uterus / IEL / immunorgulation
Research Abstract

The gammadelta T cells appearing during bacterial infection, acute graft versus host disease (GVHD) and pregnancy were characterized in mice. gammadelta T cells appearing during infection with Salmonella expressed Vdelta5,6 or 7, and proliferated in response to heat-killed Salmonella or autologus spleen cells. These gammadelta T cells were IL-2Ralpha^-beta^+gamma^+ of phenotype and did not produce IL-2, while the gammadelta T cells express an abundant level of IL-15 mRNA and proliferate significantly in response to recombinant IL-15. The gammadelta T cells appearing during salmonellosis may use IL-15 as growth factor instead of IL-2.
The gammadelta T cells are easily subjected to apoptosis after stimulation via TCR.The intracellular Ca^<++> was sustained in the gammadelta T cells after the stimulation, while the alphabeta T cells could down-modulate the cytosolic Ca^<++> rapidly after the stimulation. The sustained cytosolic Ca^<++> may be related to apoptosis of gammadelta T cells.
The gammadelta T cells in intestinal intraepithelial lymphocytes i-(IEL) exhibited a cytotoxic activity against entrocytes which constitutively expressed Fas receptor and the cytotoxicity was significantly inhibited by Fas-Ig fusion protein. During acute GVHD,the IEL expressed abundant levels of Fas-L and showed increased cytotoxic activity against Fas^+ cells. The gammadelta T cells in I-IEL may contribute to the pathogenesis of enteropathy during acute graft versus reaction (GVHD) via Fas-Fas-L system.
Uterine gammadelta T cells in activated stae were increased during pregnancy nad suppressed the anti-fetal MHC response via TGF-b production. The uterine gammadelta T cells may play important roles in immunoregulation of maternal anti-fetal responses via production of TGFbeta.

  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Sakai,T.et.al: "Host intestinal intraepithelial γδT lymphocytes present during acute graft-versus-host disease in mice may contribute to the development of enteropathy." Eur.J.Immunol.25. 87-91 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Atsuta,N.et.al: "Diversity of Vγ gene segments rearranged to Jγ4 gene segment in mice." J.Immunol.154. 676-684 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Suzuki,T.et al.: "The regulatory role of γδT cells in uterine intraepithelial lymphocytes in maternl anti-fetal immune responses." J.Immunol.154. 4476-4484 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nishimura,H.et.al: "The Role of γδT Cells in Priming Macrophages to Produce TNF-α." Eur.J.Immunol.25. 1465-1468 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Emoto,M.et.al: "Mice deficient in γδT cells are resistant to bacteremic shock induced by Salmonella choleraesuis." Infect.Immun.63. 3736-3738 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Usami,J.et.al: "The protection against the primary infection with Listeria monocytogenes mainly depends on γδT cells in autoimmune nonobese diabetic mice." Immunology. 86. 199-205 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kimura,Y.et.al: "Evidence for the early recruitment of TCR γδ^+T cells during rat listeriosis." Immunology.87. 21-28 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nishimura,H.et.al: "IL-15 is novel growth factor for murine γδT cells induced by Salmonella infection." J.Immunol.156. 663-669 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 西村仁志,吉開泰信: "細菌感染症で誘導されるストレス蛋白質の役割" 医学のあゆみ, 5

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 吉開泰信: "腸管におけるγδT細胞と生体防御" 臨床免疫, 7

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 鈴木孝信,吉開泰信: "妊娠維持におけるγδT細胞の役割" 臨床免疫, 6

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 酒井徹,吉開泰信: "GVHDによる腸病変とγδT細胞" 臨床免疫, 6

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 吉開泰信: "粘膜系γδT細胞と生体防御" 最新医学, 7

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sakai, T.et.al: "Host intestinal intraepithelial gammadelta T lymphocytes present during acute graft-versus-host disease inmice may contribute to the development of enteropathy" Eur.J.Immunol.25. 87-91 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Atsuta, N.et.al: "Diversity of Vgamma gene segments rearranged to Jgamma4 gene segment in mice" J.Immunol.154. 676-684 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Suzuki, T.et.al: "The regulatory role of gammadelta T cells in uterine intraepithelial lymphocytes in maternal anti-fetal immune responses." J.Immunol.154. 4476-4484 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nishimura, H.et.al: "The Role of gammadelta T cells in Priming Macrophages to Produce TNF-alpha." Eur.J.Immunol.25. 1465-1468 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Emoto, M.et.al: "Mice deficient in gammadelta T cells are resistant to bacteremic shock induced by Salmonella choleraesuis." Infect.Immun.63. 3736-3738 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Usami, J.et.al: "The protection against the primary infection with Listeria monocytogenes mainly depends on gammadelta T cells in autoimmune nonobese diabetic mice." Immunology. 86. 199-205 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kimura, Y.et.al: "Evidence for the early recruitment of TCR gammadelta^+ T cells during rat listeriosis." Immunology. 87. 21-28 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nishimura, H.et.al: "IL-15 is novel growth factor for murine gammadelta T cells induced by Salmonella infection." J.Immunol.156. 663-669 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1997-03-04  

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