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Factor for induction of root resorption

Research Project

Project/Area Number 12671851
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Conservative dentistry
Research InstitutionOKAYAMA UNIVERSITY

Principal Investigator

MYOKAI Fumio  Okayama University, Graduate School of Medicine and Dentistry, Professor, 大学院・医歯学総合研究科, 助手 (50263588)

Co-Investigator(Kenkyū-buntansha) NISHIMURA Fusanori  Okayama University, Dental Hospital, assistant professor, 歯学部・附属病院, 講師 (80208222)
TAKASHIBA Shogo  Okayama University, Graduate School of Medicine and Dentistry, associate professor, 大学院・医歯学総合研究科, 助教授 (50226768)
MURAYAMA Yoji  Okayama University, Graduate School of Medicine and Dentistry, Professor, 大学院・医歯学総合研究科, 教授 (50029972)
KOHNO Takayuki  Okayama University, Dental Hospital, assistant, 歯学部・附属病院, 助手 (80284074)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2001: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2000: ¥2,500,000 (Direct Cost: ¥2,500,000)
Keywordsroot resorption / PDL cell / mechanical stress / subtraction / 機械的剌激
Research Abstract

Using subtractive hybridization, we isolated genes from human periodontal ligament (PDL) cells that were differentially expressed in response to mechanical stress. MRG X gene which related to morality factor 4 gene was cloned from a human cDNA library by subsequent screening. It belongs to a novel family of transcription factors regulating cellular proliferation and senescence. Cellular proliferation is initiated by growth factor binding to specific receptors to initiate signal transduction. Transcripts for the MRG X gene were increased following mechanical stress in cultured PDL cells. The target genes for the MRG X are unknown. Transforming growth factor (TGF)-β1 is mitogenic to PDL cells and regulates the osteoblast-like phenotype of PDL cells. TGF-β1 and its type I receptor (TβR-I) genes were co-expressed following mechanical stress in cultured PDL cells. To examine the effects of the MRG X on the expression of TGF-β1 gene, we performed functional studies aimed at interfering with MRG X mRNA production in cultured PDL cells. Inhibition of MRG X gene mRNA expression in PDL cells resulted in transcription of both the TGF-β1 and TβR-I genes. An application of mechanical stress resulted in a marked reduction of the transcription of TGF-β1 gene in MRG X antisense-expressing cells. The expression level of endogenous MRGX mRNA was elevated by the mechanical stress in the cells. These findings suggest that MRG X acts as a negative regulator of transcription for both TGF-β1 gene in PDL cells.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Oyama, M., Myokai, F.et al.: "Novel gene expressed in injured dental pulp"J Det Res. 80(Speciall Isuue). 796-796 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shiomi, N., Myokai, F.et al.: "Regulation of LITAF Transcription in Monocytes"J Det Res. (Speciall Isuue). 119-119 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Masataka Oyama, Fumio Myokai, Taisuke Ohira, Nobuyuki Shiomi, Shogo Takashiba, Yoji Murayama: "Novel genes expressed in injured dental pulp."Journal of Dental Research. 80 (Special Issue). 796 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nobuyuki Shiomi, Fumio Myokai, Masataka Oyama, Shogo Takashiba, Yoji Murayama: "Salomon Amar : Regulation of LITAF Transcription in Monocytes"Journal of Dental Research. 81 (Special Issue). 119 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Oyama, M., Myokai, F.et al.: "Novel gene expressed in injured dental pulp"J Det Res. 80(Special Isuue). 796-796 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Shiomi, N., Myokai, F.et al.: "Regulation of LITAF Transcription in Monocytes"J Det Res. (Special Isuue). 119-119 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Myokai,F. et al: "Differentially expressed gene induced by mechanical stress in periodontal ligament cells"J Dent Res. 79(special issue). 235-235 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ohira,T.,F.Myokai et al: "Isolation of differentially expressed genes in periodontal wound healing"J Dent Res. 79(special issue). 237-237 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Oyama,M.,F.Myokai et al: "Isolation of genes expressed in rat dental pulp"J Dent Res. 79(special issue). 176-176 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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