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The technology to eliminate the risk of tumor formation in human iPS cells by inhibiting cholesterol biosynthesis.

Research Project

Project/Area Number 20K06661
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionKindai University

Principal Investigator

Okamura Daiji  近畿大学, 農学部, 講師 (80393263)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
KeywordsヒトiPS細胞 / 腫瘍原性 / コレステロール生合成 / アポトーシス / 未分化 / ドーパミン作動性ニューロン / 細胞死 / コレステロール生合成阻害剤 / 細胞分裂 / 心筋誘導 / 再生医療 / 未分化細胞
Outline of Research at the Start

コレステロールは細胞にとって必要不可欠であり、細胞と外部環境との境界である細胞膜を構成する主要な脂質のひとつである。このようにいかなる細胞も持ち合わせている特性を利用した、「腫瘍化の恐れのある未分化iPS細胞の除去」ならびに「目的機能細胞」を精製/純化するための技術は、様々な組織・細胞の移植に適用されることが想定され、また同じ増殖性の高いがん細胞への効果も含めて極めてユニバーサルな基幹技術となることが期待される。

Outline of Final Research Achievements

Tumour formation by residual undifferentiated cells is still a major problem in human iPS cell therapy. We found that the cholesterol biosynthesis inhibitor killed almost all undifferentiated pluripotent stem cells and immature differentiated cells by apoptosis in serum-free medium. More importantly, the survival and function of mature differentiated cells that had stopped proliferating were not affected at all. These results are expected to serve as a basic technology for the "elimination of undifferentiated cells that may become tumours" and the "purification and enrichment of mature differentiated cells", which are the most important issues in transplantation medicine using iPS cells.

Academic Significance and Societal Importance of the Research Achievements

当該申請技術は未分化iPS細胞の除去作用に加え、分化途上にある未成熟分化細胞も除去可能であり、セルソーティングなどでの物理的な純化や組織・細胞に特化した純化技術を必要とせず、またコレステロールというあらゆる細胞が必要とする構成分子に対する阻害剤であることから、組織・細胞または動物種を問わない極めてユニバーサルな残存する未分化iPS細胞による腫瘍リスク除去技術そして成熟分化細胞の純化技術となる可能性がある。また物理的な純化を必要としないため、目的分化細胞の集合体である既存の「細胞シート(心筋・網膜・角膜など)」に対しても極めて有効に作用する可能性がある。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (1 results)

  • [Int'l Joint Research] テキサス大学サウスウェスタンメディカルセンター(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] UT Southwestern(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] The amount of membrane cholesterol required for robust cell adhesion and proliferation in serum-free condition2022

    • Author(s)
      Takii Shino、Wu Jun、Okamura Daiji
    • Journal Title

      PLOS ONE

      Volume: 17 Issue: 7 Pages: e0259482-e0259482

    • DOI

      10.1371/journal.pone.0259482

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stepwise conversion methods between ground states pluripotency from naive to primed.2021

    • Author(s)
      Okamura D, Chikushi M, Chigi Y, Shiogai N, Jafar S, Wu J.
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 574 Pages: 70-77

    • DOI

      10.1016/j.bbrc.2021.07.097

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Derivation of Intermediate Pluripotent Stem Cells Amenable to Primordial Germ Cell Specification2021

    • Author(s)
      Yu Leqian、Wei Yulei、Sun Hai-Xi、Mahdi Ahmed K.、Pinzon Arteaga Carlos A.、Sakurai Masahiro、Schmitz Daniel A.、Zheng Canbin、Ballard Emily D.、Li Jie、Tanaka Noriko、Kohara Aoi、Okamura Daiji、Mutto Adrian A.、Gu Ying、Ross Pablo J.、Wu Jun
    • Journal Title

      Cell Stem Cell

      Volume: 28 Issue: 3 Pages: 550-567.e12

    • DOI

      10.1016/j.stem.2020.11.003

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cell competition constitutes a barrier for interspecies chimerism2021

    • Author(s)
      Zheng Canbin、Hu Yingying、Sakurai Masahiro、Pinzon-Arteaga Carlos A.、Li Jie、Wei Yulei、Okamura Daiji、Ravaux Benjamin、Barlow Haley Rose、Yu Leqian、Sun Hai-Xi、Chen Elizabeth H.、Gu Ying、Wu Jun
    • Journal Title

      Nature

      Volume: 592 Issue: 7853 Pages: 272-276

    • DOI

      10.1038/s41586-021-03273-0

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Development of a universal serum-free medium for cancer cell lines by regulation of cholesterol metabolism.2021

    • Author(s)
      滝井詩乃, 岡村大治
    • Organizer
      日本癌学会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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