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Function of Klf4 in the cartilage homeostasis and potential as a target for OA gene tehrapy

Research Project

Project/Area Number 17K11036
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Orthopaedic surgery
Research InstitutionKindai University

Principal Investigator

TERAMURA Takeshi  近畿大学, 大学病院, 講師 (40460901)

Co-Investigator(Kenkyū-buntansha) 中西 真人  国立研究開発法人産業技術総合研究所, 生命工学領域, 招聘研究員 (10172355)
福田 寛二  近畿大学, 医学部, 教授 (50201744)
淺原 弘嗣  東京医科歯科大学, 大学院医歯学総合研究科, 教授 (70294460)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords変形性関節症 / 転写因子 / 遺伝子治療 / 軟骨細胞 / KLF4 / ノックアウトマウス / 軟骨 / 再生医療 / 遺伝子発現
Outline of Final Research Achievements

We aimed to elucidate molecular function of Klf4 and demonstrate that Klf4 is a promising molecule for gene family of osteoarthritis (OA). RNAseq and NET-CAGEseq analysis showed that overexpression of Klf4 activates promoter/enhancer activity of cartilage specific ECM-related genes. Furthermore, RNAseq analysis with cartilage tissue from cartilage-specific Klf4 conditional knockout mice showed that the ECM related gene expressions were suppressed by Klf4 deletion. To demonstrate that delivery of KLF4 is useful for OA therapeutics, we used sendaivirus (SeV) system, and found that cartilage-specific ECM and Sox9 were significantly improved by transfection of SeV-KLF4 in human chondrocytes. In conclusion, we identified Klf4 as a candidate gene for important transcription factor in maintenance of chondrocyte homeostasis, and showed its function as a transcriptional activator for cartilage matrix genes.

Academic Significance and Societal Importance of the Research Achievements

変形性膝関節症(OA)は代表的な加齢性運動器疾患の一つであるが、効果的な治療法は存在していない。我々は、OAの根本的な治療用は変性箇所において脱分化あるいは増殖による出現した未成熟の軟骨細胞を効率的に再分化させる処置が有効であると考えた。本研究では軟骨分化制御のハブとなる候補分子としてKLF4に注目し、機能と介入の可能性について検証した。その結果、Klf4は軟骨ECMの発現に重要な役割をもつことが明らかとなり、遺伝子治療を想定して行ったステルスRNAウイルスを用いたヒト軟骨細胞へのKLF4導入実験では、軟骨分化の促進・成熟という期待した成果が得られうることが明らかになった。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] Transforming Growth Factor β-Activated Kinase 1 Regulates Mesenchymal Stem Cell Proliferation Through Stabilization of Yap1/Taz Proteins.2019

    • Author(s)
      Onodera Y, Teramura T, Takehara T, Fukuda K.
    • Journal Title

      Stem cells

      Volume: 37(12) Issue: 12 Pages: 1595-1605

    • DOI

      10.1002/stem.3083

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inflammation-associated miR-155 activates differentiation of muscular satellite cells2018

    • Author(s)
      Onodera Yuta、Teramura Takeshi、Takehara Toshiyuki、Itokazu Maki、Mori Tatsufumi、Fukuda Kanji
    • Journal Title

      PLOS ONE

      Volume: 13 Issue: 10 Pages: 204860-204881

    • DOI

      10.1371/journal.pone.0204860

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Laser-assisted cell removing (LACR) technology contributes to the purification process of the undifferentiated cell fraction during pluripotent stem cell culture2018

    • Author(s)
      Teramura Takeshi、Matsuda Koichi、Takehara Toshiyuki、Shinohara Kenji、Miyashita Yuji、Mieno Yasumichi、Mori Tatsufumi、Fukuda Kanji、Suzuki Koichi、Suemori Hirofumi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 503 Issue: 4 Pages: 3114-3120

    • DOI

      10.1016/j.bbrc.2018.08.101

    • NAID

      120006879491

    • Related Report
      2018 Research-status Report
  • [Journal Article] Stem cell depletion by inflammation-associated miR-1552018

    • Author(s)
      Teramura Takeshi、Onodera Yuta
    • Journal Title

      Aging

      Volume: 10 Issue: 1 Pages: 17-18

    • DOI

      10.18632/aging.101374

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 多能性幹細胞からの間葉系幹細胞の分化誘導2018

    • Author(s)
      寺村 岳士
    • Organizer
      日本再生医療学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 間葉系幹細胞の分化誘導、幹細胞維持におけるTWIST1の機能2017

    • Author(s)
      寺村 岳士、浅原 弘嗣、福田 寛二
    • Organizer
      日本整形外科学会基礎学術集会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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