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Elucidation of the mechanism for the activation of transcription factors and gene response in the aorta of the Postprandial state of rata

Research Project

Project/Area Number 18590981
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Metabolomics
Research InstitutionShiga University of Medical Science

Principal Investigator

NISHIO Yoshihiko  Shiga University of Medical Science, Undergraduate School of Medicine, Associate professor (40281084)

Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,920,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥420,000)
Fiscal Year 2007: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2006: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsInsulin / Transcription Factors / C / EBP / Inflammatory genes / 高インスリン血症 / インスリン抵抗性 / MCP-1
Research Abstract

We evaluated whether hyperinsulinaemia stimulates the expression of transcription factor CCAAT/enhancer binding protein (C/EBP) -b and C/EBP-d and leads to the induction of monocyte chemoattractant protein-1 (MCP-1) gene expression in aortas.
Insulin at 10 nmol/l significantly stimulated the mRNA expressions of C/EBP-b C/EBP -d and MCP-1, depending on activation of phosphatidy linositol 3-kinase (PI3K) in cultured vascular smooth muscle cells. The knock down of C/EBP-bwith siRNA abolished the insulin-induced mRNA expression of MCP-1. In the aortas from fructose-fed rats, the levels of phosphorylation of Akt, a downstream molecule of PI3K, were also increased. The mRNA expressions of C/EBP-b, C/EBP-dand MCP-1 in the aortas from fructose-fed rats were significantly elevated, by 330, 300, and 300%, respectively, compared with those of control-fed rats. The induction of mRNA expression of MCP-1 in the aortas was significantly correlated with the mRNA expressions of C/EBPs in the aortas. Furthermore, ChIP assay showed elevated binding of C/EBP-b to the 5'-upstream region of MCP-1 gene in the aortas from fructose-fed rats.
These findings clearly indicate the role of C/EBPs in the mechanism of up-regulation of MCP-1, an inflammation-related protein, observed in hyperinsulinaemic state, which may initiate the process of atherosclerosis.

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (18 results)

All 2007 2006

All Journal Article (14 results) (of which Peer Reviewed: 7 results) Presentation (4 results)

  • [Journal Article] Increased expression of CCAAT/enhancer binding protein-beta and -delta andmonocyte chemoattractant protein-1 genes in aortas from hyperinsulinaemic rats.2007

    • Author(s)
      Sato Y, Nishio Y, Sekine O, 他
    • Journal Title

      Diabetologia 50

      Pages: 481-489

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Pitavastatin restores vascular dysfunction in insulin-resistant state byinhibiting NAD(P)H oxidase activity and uncoupled endothelial nitric oxidesynthase-dependent superoxide production.2007

    • Author(s)
      Shinozaki K, Nishio Y, Ayajiki K, 他
    • Journal Title

      J Cardiovasc Pharmacol 49

      Pages: 122-130

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] RBMX is a novel hepatic transcriptional regulator of SREBP-lc gene response tohigh-fructose diet.2007

    • Author(s)
      Takemoto T, Nishio Y, Sekine O, 他
    • Journal Title

      FEBS Lett 581

      Pages: 218-222

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Increased expression of CCAAT/enhancer binding protein-beta and -delta and monocyte chemoattractant protein-1 genes in aortas from hyperinsulinaemic rat2007

    • Author(s)
      Sato, Y., Nishio, Y., Sekine, O., et. al.
    • Journal Title

      Diabetologia 50

      Pages: 481-489

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Pitavastatin restores vascular dysfunction in insulin-resistant state byinhibiting NAD(P)H oxidase activity and uncoupled endothelial nitric oxidesynthase-dependent superoxide production2007

    • Author(s)
      Shinozaki, K., Nishio, Y., Ayajiki, K., et. al.
    • Journal Title

      J Cardiovasc Pharmacol 49

      Pages: 122-130

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] RBMX is a novel hepatic transcriptional regulator of SREBP-1c gene response tohigh-fructose diet2007

    • Author(s)
      Takemoto, T., Nishio, Y., Sekine, O., et. al.
    • Journal Title

      FEBS Lett 581

      Pages: 218-222

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Increased expression of CCAAT/enhancer binding protein-beta and-delta an dmonocyte chemoarnactant protein-1 genes in aortas from hyperinsulinaemicrats2007

    • Author(s)
      Sato Y, Nishio Y, Sekine O, 他
    • Journal Title

      Diabetologia 50

      Pages: 481-489

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pitavastatin restores vascular dysfunction in insulin-resistant state byinhibiting NAD(P)H oxidase activity and uncoupled endothelial nitric oxidesynthase-dependent superoxide production2007

    • Author(s)
      Shinozaki K, Nishio Y, Ayajiki K, 他
    • Journal Title

      J Cardiovasc Pharmacol 49

      Pages: 122-130

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] RBMX is a novel hepatic transcriptional regulator of SREBP-1c gene response tohigh-fiuctose diet2007

    • Author(s)
      Takemoto T, Nishio Y, Sekine O, 他
    • Journal Title

      FEBS Lett 581

      Pages: 218-222

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Increased expression of CCAAT/enhancer binding protein-beta and-delta and monocyte chemoattractant protein-1 genes in aortas from hyperinsulinaemic rats.2007

    • Author(s)
      Sato Y, Nishio Y, Sekine O et al.
    • Journal Title

      Diabetologia 50

      Pages: 481-9

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Transcription factor activating enhancer-binding protein-2beta. A negative regulator of adiponectin gene expression.2006

    • Author(s)
      Ikeda K, Maegawa H, UgiS, 他
    • Journal Title

      J Biol Chem 281

      Pages: 31245-53

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Transcription factor activating enhancer-binding protein-2beta. A negative regulator of adiponectin gene expression2006

    • Author(s)
      Ikeda, K., Maegawa, H., Ugi, S., et. al.
    • Journal Title

      J Biol Chem 281

      Pages: 31245-53

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] RBMX is a novel hepatic transcriptional regulator of SREBP-1c gene response to high-fructose diet.2006

    • Author(s)
      Takemoto T, Nishio Y, Sekine O, et al.
    • Journal Title

      FEBS Lett. 581

      Pages: 218-22

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Transcription factor activating enhancer-binding protein-2beta. A negative regulator of adiponectin gene expression.2006

    • Author(s)
      Ikeda K, Maegawa H, Ugi S, et al.
    • Journal Title

      J Biol Chem 281

      Pages: 31245-53

    • Related Report
      2006 Annual Research Report
  • [Presentation] 2型糖尿病と動脈硬化2007

    • Author(s)
      西尾善彦
    • Organizer
      第22回日本糖尿病合併症学会(シンポジウム)
    • Place of Presentation
      筑波
    • Year and Date
      2007-10-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 高インスリン血症と血管炎症2006

    • Author(s)
      西尾善彦
    • Organizer
      第21回日本糖尿病合併症学会(シンポジウム)
    • Place of Presentation
      弘前
    • Year and Date
      2006-10-07
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Increased Expression of CCAAT/Enhancer Binding Protein-β and-δ and Monocyte Chemoattractant Protein-1 Genes in Aort as from Hyperinsulinemic Rats.2006

    • Author(s)
      Sekine O, 他
    • Organizer
      66th Scientific Sessions of American Diabetes Association
    • Place of Presentation
      San Francisco, USA
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Increased Expression of CCAAT/Enhancer Binding Protein-β and -δ and Monocyte Chemoattractant Protein-1 Genes in Aortas from Hyperinsulinemic Rats2006

    • Author(s)
      Sekine, O., Nishio, Y., Sato, Y., et. al.
    • Organizer
      66th Scientific Sessions of American Diabetes Association
    • Place of Presentation
      San Francisco, CA, USA
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2006-04-01   Modified: 2016-04-21  

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