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ES細胞全能性維持能力の分子レベルでの解明

Research Project

Project/Area Number 14081206
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionSaitama Medical University

Principal Investigator

奥田 晶彦  埼玉医科大学, 医学部, 教授 (60201993)

Project Period (FY) 2002 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥55,900,000 (Direct Cost: ¥55,900,000)
Fiscal Year 2006: ¥11,700,000 (Direct Cost: ¥11,700,000)
Fiscal Year 2005: ¥10,500,000 (Direct Cost: ¥10,500,000)
Fiscal Year 2004: ¥11,700,000 (Direct Cost: ¥11,700,000)
Fiscal Year 2003: ¥11,000,000 (Direct Cost: ¥11,000,000)
Fiscal Year 2002: ¥11,000,000 (Direct Cost: ¥11,000,000)
KeywordsES細胞 / 未分化状態 / 多様性 / 自己増殖性 / 腫瘍原性 / 神経幹細胞 / stemness遺伝子 / ジーンタゲティング / 多能性・自己増殖性 / 組織幹細胞 / UTF1 / JAM-B / Nucleostemin / 多能生・自己増殖生 / 細胞増殖 / Oct-3 / 4 / ERas / エンハンサー / Sox-2 / プロモータートラップ / DNA chip
Research Abstract

本特定領域発足時から2つのテーマを持って研究に取り組んできた。その1つは、ES細胞を含め、複数の幹細胞で未分化状態特異的に発現する遺伝子をジーンタゲティングの手法を用いて解析するというものであるが、その一つとして、Jam-B遺伝子のノックアウトマウスを作製し、この遺伝子のES細胞、神経幹細胞、ならびに血液幹細胞での役割を検証し、昨年9月に、Mol. Cell. Biol.に論文を発表した。また、同様なラインにそった研究として、Sox2遺伝子のコンディショナルノックアウト解析を行い、同遺伝子の神経幹細胞における機能を明らかにした。
2つ目の研究目的は、ES細胞が持つ様々な特徴的な性質を分子レベルで明らかにするというものであるが、平成17年度に、ES細胞特異的転写補助因子UTF1の発現の低いES細胞は、ES細胞を用いた治療を実現する上で最も障害になるであろうと考えられている腫瘍原性が低下していることを明らかにし、論文を発表したが、そのUTF1とES細胞が持つ腫瘍原性との関係を確定的なものにする為に、UTF1ダブルノックアウトES細胞の樹立し、その細胞を用いてUTF1遺伝子の機能解析を行った。

Report

(5 results)
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (12 results)

All 2006 2005 2004 Other

All Journal Article (7 results) Publications (5 results)

  • [Journal Article] The Sox2 regulatory region 2 functions as a neural stem cell-specific enhancer in the telencephalon2006

    • Author(s)
      Satoru Miyagi
    • Journal Title

      Journal of Biological Chemistry 281

      Pages: 13374-13381

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Putative stemness gene Jam-B is not required for maintenance of stem cell state in embryonic, neural, or hematopoietic stem cells2006

    • Author(s)
      Takehisa Sakaguchi
    • Journal Title

      Molecular and Cellular Biology 26

      Pages: 6557-6570

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Identification of an enhancer that controls up-regulation of fibronectin during differentiation of embryonic stem cells into extraembryonic endoderm2005

    • Author(s)
      Tetsu Shirai
    • Journal Title

      Journal of Biological Chemistry 280

      Pages: 7244-7252

    • Related Report
      2005 Annual Research Report 2004 Annual Research Report
  • [Journal Article] Oct-3/4 maintains the proliferative ES cell state via specific binding to a variant octamer sequence in the regulatory region of the UTF1 locus2005

    • Author(s)
      Masazumi Nishimoto
    • Journal Title

      Molecular and Cellular Biology 25

      Pages: 5084-8094

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Oct-3/4 maintains the proliferative ES cell state via specific binding to a variant octamer sequence in the regulatory region of the UTF1 locus2005

    • Author(s)
      Masazumi Nishimoto
    • Journal Title

      Molecular and Cellular Biology (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] The Sox-2 regulatory regions display their activities in two distinct types of multipotent stem cells2004

    • Author(s)
      Satoru Miyagi
    • Journal Title

      Molecular and Cellular Biology 24

      Pages: 4207-4220

    • Related Report
      2004 Annual Research Report
  • [Journal Article] The Sox2 regulatory region 2 functions as a neural stem cell specific enhancer in the telencephalon

    • Author(s)
      Satoru Miyagi
    • Journal Title

      Journal of Biological Chemistry in press

    • Related Report
      2005 Annual Research Report
  • [Publications] Mizuho Tomioka: "Identification of Sox-2 regulatory region which is under the control of Oct-3/4-Sox-2 complex"Nucleic Acids Res.. 30. 3202-3213 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Masazumi Nishimoto: "The embryonic Octamer factor 3/4 displays distinct DNA binding specificity from those of other Octamer factors"Biochem.Biophys.Res.Commun.. 302. 581-586 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Satoru Miyagi: "The Sox-2 regulatory regions display their activities in two distinct multipotent stem cells"Mol.Cell.Biol.. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Mizuho Tomioka: "Identification of Sox-2 regulatory region which is under the control of Oct-3/4-Sox-2 complex"Nucleic Acids Research. 30. 3202-3213 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Masazumi Nishimoto: "The embryonic Octamer factor 3/4 displays distinct DNA binding specificity from those of other Octamer factors"Biochem. Biophys. Res. Commun.. 302. 581-586 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2018-03-28  

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