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上皮細胞増殖制御の機能的ハプタンパク質S100Cの機能解明とがん治療への応用

Research Project

Project/Area Number 18013035
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionOkayama University

Principal Investigator

許 南浩  Okayama University, 大学院・医歯薬学総合研究科, 教授 (70173573)

Co-Investigator(Kenkyū-buntansha) 阪口 政清  岡山大学, 大学院・医歯薬学総合研究科, 助教 (70379840)
宮崎 正博  岡山学院大学, 人間生活学部, 教授 (90116509)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥12,100,000 (Direct Cost: ¥12,100,000)
Fiscal Year 2007: ¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 2006: ¥6,000,000 (Direct Cost: ¥6,000,000)
KeywordsS100 / Annexin / がん / EGF / RAGE / 乾癬 / 表皮 / 角化細胞 / S100C / A11 / ヒト表皮角化細胞 / 増殖制御 / Annexin A1
Research Abstract

本研究計画は1)がんのTGFβ抵抗性とS100A11機能との関連を明らかにする、2)S100A11のAnnexinA1との結合、ヒトがんでの発現充進の意味を明らかにする、3)この知見を治療に応用する、ことを目的とする。平成18年度は1)について報告した。平成19年度は主に2)に取り組み、以下の結果を得た。
1.正常ヒト表皮角化細胞(NHK)において、S100A11はAnnexin A1と複合体を形成しPhospholipase A2と結合してその活性を抑制した。その結果アラキドン酸カスケードが抑制されて細胞増殖が低下した。EGFという増殖刺激が入るとphospholipase A2活性抑制の解除が起こって細胞増殖が維持される。即ち、TGFβとEGFというシグナル系がS100A11を接点として関連する。(J Biol Chem 282:35679-86,2007)
3.NHKはS100A11を分泌し、分泌型SIOOA11はNHKの増殖を促進した。この増殖促進は主にEGFファミリーの産生誘導によった。S100A11はRAGE、NFkBとAkt、CREBを介してEGF遺伝子を活性化した。即ち、S100A11は、細胞内では増殖抑制、分泌されると増殖促進という二面性の役割を担う。(Mol Biol Cell 19:78-85,2008)
4.S100A8とS100A9がNHKから分泌され、NHKに作用して炎症性サイトカインの産生・分泌を誘導する、それが逆にS100A8,S100A9の産生・分泌を促進する、S100A8/A9自体がNHKに対する増殖促進作用を持つ、ことを見出した(J Cell Biochem印刷中)。
以上の成果によって、S100C/A11の機能的ハブとしての本態の解明に大きな展開が得られた。今後は、SIOOタンパク質群の受容体RAGEの作動機構の本態の解析を通じて治療戦略の構築を目指す。

Report

(2 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (10 results)

All 2008 2007 2006 Other

All Journal Article (9 results) (of which Peer Reviewed: 3 results) Presentation (1 results)

  • [Journal Article] S100All, an Dual Mediator for Growth Regulation of Human Kerationocytes.2008

    • Author(s)
      Sakaguchi, et. al.
    • Journal Title

      Molecular Biology of the Cell 19

      Pages: 78-85

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Truncation of annexin Al is a regulatory lever for linking epidermal growth factor signaling with cytosolic phospholipase A2 in normal and malignant squamous epithelial cells.2007

    • Author(s)
      Sakaguchi, et. al.
    • Journal Title

      Journal of Biological Chemistry 282

      Pages: 35679-35686

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] REIC/Dkk-3 as a potential gene therapeutic agent against human testicular cancer2007

    • Author(s)
      Tanimoto et al.
    • Journal Title

      International Journal of Molecular Medicine 19・3

      Pages: 363-368

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Isolation of epithelial stem cells from dermis by a three-dimensional culture system2006

    • Author(s)
      Medina et al.
    • Journal Title

      Journal of Cellular Biochemistry 98・1

      Pages: 174-184

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Implantation of a new porous gelatin- siloxane hybrid into a brain lesion as a potential scaffold for tissue regeneration2006

    • Author(s)
      Deguchi et al.
    • Journal Title

      Journal of Cerebral Blood Flow and Metabolism 26・10

      Pages: 1263-1273

    • Related Report
      2006 Annual Research Report
  • [Journal Article] S100A8/A9, a key mediator for positive feedback growth stimulation of normal human keratinocytes.

    • Author(s)
      Nukui, et. al.
    • Journal Title

      Journal of Cellular Biochemistry (印刷中)

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Involvement of deterioration in S100C/A11-mediated pathway in resistance of human squamous cancer cell lines to TGF β-induced growth suppression

    • Author(s)
      Sonegawa et al.
    • Journal Title

      Journal of Molecular Medicine (印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Limited contribution of cells of intact extrahepatic tissue origin to hepatocyte regeneration in transplanted rat liver

    • Author(s)
      Tomiyama et al.
    • Journal Title

      Tranplantation (印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Heat shock proteins play a crucial role in tumor-specific apoptosis by REIC-Dkk-3

    • Author(s)
      Abarzua et al.
    • Journal Title

      International Journal of Molecular Medicine (印刷中)

    • Related Report
      2006 Annual Research Report
  • [Presentation] S100All, an ambivalent mediator for growth regulation of human keratinocytes2007

    • Author(s)
      Sakaguchi, et. al.
    • Organizer
      Annual Meeting of American Association of Cell Biology
    • Place of Presentation
      ワシントン(米国)
    • Related Report
      2007 Annual Research Report

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Published: 2006-04-01   Modified: 2018-03-28  

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