Journal of Microbiology

  • 제37권2호
  • /
  • Pages.111-116
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  • 1999
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  • 1225-8873(pISSN)
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  • 1976-3794(eISSN)
한국미생물학회 (The Microbiological Society of Korea)
권호 표지

Tumor Necrosis Factor Receptor (TNFR)-associated factor 2 (TRAF2) is not Involved in GM-CSF mRNA Induction and TNF-Mediated Cytotoxicity

  • Kim, Jung-Hyun (Department of Biochemistry and Molecular Biology, Hanyang University) ;
  • Cha, Myung-Hoon (Department of Biochemistry and Molecular Biology, Hanyang University) ;
  • Lee, Tae-Kon (Department of Biochemistry and Molecular Biology, Hanyang University) ;
  • Seung, Hyo-Jun (Department of Biochemistry and Molecular Biology, Hanyang University) ;
  • Park, Choon-Sik (Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Hosptial) ;
  • Chung, Il-Yup (Department of Biochemistry and Molecular Biology, Hanyang University)
  • 발행 : 1999.06.01
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초록

Tumor necrosis factor receptor (TNFR)-associated factor 2 (TRAF2) is known to act as a signal transducer that connects TNFR2 to its downstream effector functions such as proliferation of thymocytes, regulation of gene expression, and cell death. TRAF2 consists of largely two domains, the N-terminal half that contains a signal-emanating region and the C-terminal half that is responsible for binding to the intracellular region of TNFR2. In this study, we examined the possible roles of TRAF2 in granulocyte-macrophage colony-stimulating factor (GM-CSF) gene expression and cell death. A truncated mutant of TRAF2 ( 2-263) that contains only a C-terminal half was generated, and transiently transfected to the A549 cell, a human lung cancer cell line, and L929 cell, a murine TNF-sensitive cell line. GM-CSF mRNA was induced in untransfected A540 cells both in dose- and time-dependent manner upon the exposure of TNF. However, neither the full length TRAF2 nor the mutant altered GM-CSF mRNA production regardless of the presence or absence of TNF. Furthermore, neither TRAF2 versions significantly changed the cytotoxic effect of TNF on L929 cells. These data suggest that TRAF2 may not be involved in the signal transduction pathway for GM-CSF gene induction and cell death mediated by TNF.

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