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Pannexin 3 provides bone marrow niche for B- and T cell differentiation.

Research Project

Project/Area Number 19K22698
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 57:Oral science and related fields
Research InstitutionTohoku University

Principal Investigator

Ishikawa Masaki  東北大学, 大学病院, 助教 (60432936)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Keywords骨髄幹細胞 / 骨髄ニッチ / 免疫細胞分化 / Gap junction / Pannexin / 幹細胞 / ギャップジャンクション / 微小環境 / ATP / 造血幹細胞 / 骨芽細胞 / 骨再生 / 口腔免疫 / Gap junction protein / 幹細胞ニッチ
Outline of Research at the Start

Panx3 null およびconditional (Col2.3 Cre) KO mouseを用いて、骨髄内の免疫細胞およびHSCの分化および分布度合いを検討する。さらに、骨髄におけるHSCから免疫細胞への分化過程のどの部分に異常をきたしているかを明らかにした後、Panx3が制御する骨髄微小環境の役割を探求する。

Outline of Final Research Achievements

Bone has been defined as an endocrine organ to regulate physiological functions in many tissues. Bone marrow stem cell niche plays important roles for hematopoietic cell differentiation and maintenance. However, the mechanisms and component of bone marrow niche are not fully understood. Pannexin 3 (Panx3), a member of gap junction protein family is predominately expressed in hard tissue such as bone, cartilage and tooth. Panx3 inhibits precursor cell proliferation and promotes differentiation by its small molecule permeable channel functions. Still, Panx3 functios in bone marrow, especially as bone marrow niche is not known. Here, we describe that Panx3 KO mice revealed the skeletal dysplasia, enlarged thymus and shrunken spleen. Further, B- and T cell maturation in Panx3 KO mice were insufficient. Thus, our findings suggest that Panx3 regulates B- and T cell differentiation by Panx3-provided bone marrow niche.

Academic Significance and Societal Importance of the Research Achievements

今研究で硬組織特異的Gap junction 膜タンパクPanx3が形成する骨髄微小環境、ニッチがB細胞およびT細胞の分化を制御することを明らかにした。この結果は新しい骨髄ニッチの存在を示し、骨環境に新たな免疫細胞形成機構があることを示唆するもので、学術的に新しい扉を開けるものとなった。また、Gap junctionによる骨髄ニッチは初の報告であり、細胞生物学的にも新しい発見と言える。今回の発見は骨生理“骨を中心とした全身の恒常性維持機構”をより解明するものであり、今後さらなる免疫細胞の維持および分化機構を明らかにすることで新治療法開発にも波及する可能性を示した。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (5 results)

All 2021 2019 Other

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

  • [Int'l Joint Research] National Institute of Health(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] NIH(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Pannexin 3 regulates skin development via Epiprofin2021

    • Author(s)
      Zhang Peipei、Ishikawa Masaki、Doyle Andrew、Nakamura Takashi、He Bing、Yamada Yoshihiko
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1

    • DOI

      10.1038/s41598-021-81074-1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Pannexin 3 ER Ca2+ channel gating is regulated by phosphorylation at the Serine 68 residue in osteoblast differentiation2019

    • Author(s)
      Ishikawa Masaki、Williams Geneva、Forcinito Patricia、Ishikawa Momoko、Petrie Ryan J.、Saito Kan、Fukumoto Satoshi、Yamada Yoshihiko
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 18759-18759

    • DOI

      10.1038/s41598-019-55371-9

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Remarks]

    • URL

      https://twitter.com/pannexin_papers

    • Related Report
      2020 Annual Research Report

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Published: 2019-07-04   Modified: 2022-01-27  

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