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1996 Fiscal Year Final Research Report Summary

Molecular biological approach to the treatment of endotoxin shock

Research Project

Project/Area Number 07670852
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Pediatrics
Research InstitutionDepartment of Pediatrics, Shinshu Univ. school of Medicine

Principal Investigator

YASUI Kozo  Shool of Medicine, Shinshu University, 医学部・附属病院, 講師 (90200493)

Co-Investigator(Kenkyū-buntansha) TSUNO Takahisa  Shool of Medicine, Shinshu University, 助手 (10242695)
MATSUOKA Takafumi  Shool of Medicine, Shinshu University, 医学部, 講師 (70270965)
Project Period (FY) 1995 – 1996
Keywordsneutrophil / endotoxin / CD14 / adhesion molecule / apoptosis / Behcet disease / pentoxifylline
Research Abstract

Endotoxin (lipopolysaccharide ; LPS) is a potent biological response modifier of cells, including macrophages, neutrophils and endothelial cells (EC). LPS stimulation is mediated through a cell surface receptor, known as CD14. In our study, it is clarified that LPS primes neutrophils in the combination with serum via CD14 and the expression of ICAM-1 on EC is also enhanced under the condition with serum. The adhesion and O_2-production of neutrophils are markedly enhanced on the EC monolayr by treatment with TNF-alpha or LPS+serum. Monoclonal antibody (mAb) against CD18 inhibits neutrophil-EC adhesion and O_2-production. Anti-CD11b mAb inhibits adhesion, however, stimulates O_2-production These findings indicate that the adhesion mediated by CD11b provides the signal (trigger) for superoxide production by neutrophils. These effects are not blocked by anti-TNF antibody.
Superoxide production by neutrophils plays a crucial role in the pathogenesis of endotoxin shock. The excessive priming of neutrophils may bring some toxicity to normal tissue. In the process, apoptosis may provide a mechanism for clearance of the unwanted cells. GM-CSF and G-CSF have different effects on the apoptosis of human mature neutrophils induced by anti-Fas antibody. GM-CSF suppress the apoptosis and retain neutrophil functions of superoxide production. It is postulated that GM-CSF works as an inflammatory cytokine which maintain neutrophil survival.
Behcet disease is a chronic condition in which the functions of neutrophils are characteristically increased. Pentoxifylline is a membrane fluidizer that modulates receptor-mediated cellular functions. It is wellknown that pentoxifylline reduces neutrophil-induced tissue damage. We examined the effect of pentoxifylline in controlling Behcet disease and get improved clinical conditions and normalized neutrophil functions in all of our patients.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 安井,耕三 他: "新生児の好中球:機能と生理" 日本産婦人科・新生児血液学会誌. 5巻3号. 48-59 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yasui K.他: "Effects of high-dose granulocyte colony-stimulating factor on neutrophil functions" Br. J. Haematol. 92. 571-573 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yasui K.他: "Successful treatment of Behcet diseose with pentoxify lline" Ann. Intern. Med.124. 891-893 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 安井,耕三 他: "サトカインによる好中球シグナル伝達機構" 臨床免疫. 28. 327-332 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Miyabayashi M,Yasui K: "Regulation of nentrophl O_2-production by nentrophl-endothelial cell inter-actin viaCD11b;its modulatim by TNF-α and LPS" Int. J. Hemafol.65. 49-59 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 安井,耕三 他: "好中球機能" 小児科診療. 59. 378-382 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 安井,耕三 他: "好中球減少症" 小児内科. 28. 1171-1176 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hu B, Yasui K: "Effects of colony-stimulating foctors (CSF_0) on neutrophil apoptosis : possible roles in inflammation site" Int. J. Hematol. in press. (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 安井,耕三: "好中球機能発現における細胞内情報伝達機構" 炎症. 印刷中. (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yasui, K., Tsuno, T., Miyabayashi, M., Yamazaki, M., Komiyama, A.: "Effects of high-dose granulocyte colony-stimulating factor on neutrophil functions." Br. J.Haematol. 92. 571-573 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yasui, K., Ohta, K., Kobayashi, M., Aizawa, T., Komiyama, A.: "Successful treatment of Behcet disease with pentoxifylline." Ann. Intern. Med. 124. 891-893 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Miyabayashi, M., Yasui, K.: "Regulation of neutrophil O_2-production by neutrophil-endothelial cell interaction via CD11b ; its modulation by tumor necrosis factor-alpha (TNFalpha) and lipopoly-saccharide." Int. J.Hematol. 65. 49-59 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hu, B., Yasui, K.: "Effects of colony-stimulating factors (CSFs) on neutrophil apoptosis : possible roles in inflammation site." Int. J.Hematol. (in press).

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

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Published: 1999-03-09  

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