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Analysis of vesicular traffic involving systemic RNAi

Research Project

Project/Area Number 20H03422
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 48020:Physiology-related
Research InstitutionTokyo Women's Medical University

Principal Investigator

Mitani Shohei  東京女子医科大学, 医学部, 教授 (90192757)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2023: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
KeywordsRNAi / Caenorhabditis elegans / vesicular traffic / zipt-9 / tbc-3 / rexd-1 / RNA干渉 / ZIPT-9 / TBC-3 / REXD-1 / 小胞輸送 / 線虫 / 全身性RNAi / 全身性RNA干渉 / 亜鉛輸送体 / Rab GAP / 亜鉛濃度 / 開口放出 / C. elegans
Outline of Research at the Start

本研究では、RNA干渉(RNAi)が細胞間で伝播する現象に焦点を当て、それに関わる小胞輸送分子の機能解析を行う。線虫で最初に見つかった全身性RNAi(ある組織でRNAiが起こると別の組織に同様の効果が伝播すること)の分子細胞メカニズムとその生理学的意義の解明を目指している。申請者は、線虫の順遺伝学を用いてこの現象に関わる新規分子を多数発見している。本申請ではその中でも2種の遺伝子(亜鉛トランスポーターとRab GAPタンパク質)に焦点を当て、その作用の分子メカニズムに至るまで線虫遺伝学を用いて解析する。

Outline of Final Research Achievements

RNA interference is a phenomenon that double stranded RNA (dsRNA) acts to degrade mRNA molecules that have the same sequence. The phenomenon was first discovered in C. elegans, but later, was also demonstrated to be active other cells including humans, suggesting usefulness for application to medical treatments. We hypothesized that dsRNA molecules are transferred via the vesicular trafficking function. We screened and found that zipt-9 mutants show an enhanced RNAi phenotype via importing dsRNA into cells. We also found that two mutants tbc-3 and rexd-1 show a decreased RNAi phenotypes, and the two molecules are involved in exporting dsRNA from cells. When animals eat E. coli with dsRNA as a food, animals can absorb dsRNA into intestinal cells and then secrete these dsRNA into extracellular spaces. Other tissues absorb dsRNA and the RNAi effects can spread to the whole body.

Academic Significance and Societal Importance of the Research Achievements

RNAi(RNA干渉)は二本鎖RNA(人工合成されたsiRNAを含む)を細胞に投与することで、細胞内の同一配列mRNAを分解して遺伝子機能を抑制する生命現象である。ヒト細胞などでも有効であることから、分子細胞生物学的な実験で多用されている。一方、当初期待されていた医療応用に関しては、一部の脳神経系疾患などに応用されて臨床試験も進んでいるが、ウイルス感染症やがんなどの重篤な疾患の治療には劇的な成果に至っていない。我々は、RNAiが増強する線虫の遺伝子変異体が存在することを明らかにした。これは、生体内でRNAi経路が特定の遺伝子を抑制することで増強でき、治療の適用を拡大できる可能性を示している。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (25 results)

All 2024 2023 2022 2021 2020 Other

All Journal Article (15 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 14 results,  Open Access: 14 results) Presentation (2 results) Book (2 results) Remarks (4 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] A humanized Caenorhabditis elegans model for studying pathogenic mutations in VPS45, a protein essential for membrane trafficking, associated with severe congenital neutropenia2023

    • Author(s)
      Gengyo-Ando K他
    • Journal Title

      MicroPubl Biol

      Volume: 2023 Pages: 17912-17912

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Febuxostat ameliorates muscle degeneration and movement disorder of the dystrophin mutant model in Caenorhabditis elegans2023

    • Author(s)
      Yoshina Sawako、Izuhara Luna、Mashima Rei、Maejima Yuka、Kamatani Naoyuki、Mitani Shohei
    • Journal Title

      The Journal of Physiological Sciences

      Volume: 73 Issue: 1 Pages: 28-28

    • DOI

      10.1186/s12576-023-00888-y

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Distinct pathways for export of silencing RNA in Caenorhabditis elegans systemic RNAi2023

    • Author(s)
      Yoshida Keita、Suehiro Yuji、Dejima Katsufumi、Yoshina Sawako、Mitani Shohei
    • Journal Title

      iScience

      Volume: 26 Issue: 10 Pages: 108067-108067

    • DOI

      10.1016/j.isci.2023.108067

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] BCL7B, a SWI/SNF complex subunit, orchestrates cancer immunity and stemness2023

    • Author(s)
      Higuchi Sayaka、Suehiro Yuji、Izuhara Luna、Yoshina Sawako、Hirasawa Akira、Mitani Shohei
    • Journal Title

      BMC Cancer

      Volume: 23 Issue: 1 Pages: 811-811

    • DOI

      10.1186/s12885-023-11321-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] AMPK-FOXO-IP3R signaling pathway mediates neurological and developmental defects caused by mitochondrial DNA mutations2023

    • Author(s)
      Zhang H他
    • Journal Title

      Proc Natl Acad Sci U S A.

      Volume: 120 Issue: 36

    • DOI

      10.1073/pnas.2302490120

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An endomembrane zinc transporter negatively regulates systemic RNAi in Caenorhabditis elegans2023

    • Author(s)
      Dejima Katsufumi、Imae Rieko、Suehiro Yuji、Yoshida Keita、Mitani Shohei
    • Journal Title

      iScience

      Volume: 26 Issue: 6 Pages: 106930-106930

    • DOI

      10.1016/j.isci.2023.106930

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A small RNA system ensures accurate homologous pairing and unpaired silencing of meiotic chromosomes2023

    • Author(s)
      Tabara H他
    • Journal Title

      EMBO J

      Volume: 42 Issue: 11

    • DOI

      10.15252/embj.2020105002

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] An atonal homolog, lin-32, regulates hypodermal morphogenesis in Caenorhabditis elegans.2023

    • Author(s)
      Hori S, Mitani S.
    • Journal Title

      MicroPubl Biol

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Balancer-assisted outcrossing to remove unwanted background mutations.2022

    • Author(s)
      Dejima K, Mitani S.
    • Journal Title

      MicroPubl Biol

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Integration of multicopy extrachromosomal transgenes into defined loci without phenotypes.2022

    • Author(s)
      Yoshina S, Mitani S
    • Journal Title

      MicroPubl Biol

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The transcription factor unc-130/FOXD3/4 contributes to the biphasic calcium response required to optimize avoidance behavior2022

    • Author(s)
      Hori S and Mitani S
    • Journal Title

      Sci Rep

      Volume: 12 Issue: 1 Pages: 1907-1907

    • DOI

      10.1038/s41598-022-05942-0

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Efficient collection of a large number of mutations by mutagenesis of DNA damage response defective animals2021

    • Author(s)
      Suehiro Yuji、Yoshina Sawako、Motohashi Tomoko、Iwata Satoru、Dejima Katsufumi、Mitani Shohei
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 1-13

    • DOI

      10.1038/s41598-021-87226-7

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 線虫NBRPと疾患解析2021

    • Author(s)
      伊豆原郁月、吉名佐和子、三谷昌平
    • Journal Title

      細胞

      Volume: 53 Pages: 811-813

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Defects in CISD-1, a mitochondrial iron-sulfur protein, lower glucose level and ATP production in Caenorhabditis elegans2020

    • Author(s)
      Hsiung KC, Liu KY, Tsai TF, Yoshina S, Mitani S, Chin-Ming Tan B, Lo SJ.
    • Journal Title

      Biomed J.

      Volume: 43 Issue: 1 Pages: 32-43

    • DOI

      10.1016/j.bj.2019.07.009

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Analysis of GPI-anchored proteins involved in germline stem cell proliferation in theCaenorhabditis elegansgermline stem cell niche2020

    • Author(s)
      Rikitake Marika、Matsuda Ayako、Murata Daisuke、Dejima Katsufumi、Nomura Kazuko H、Abbott Karen L、Mitani Shohei、Nomura Kazuya
    • Journal Title

      The Journal of Biochemistry

      Volume: 168 Issue: 6 Pages: 589-602

    • DOI

      10.1093/jb/mvaa075

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 遺伝子機能解析のための欠失変異体の収集・保存・提供2023

    • Author(s)
      吉名佐和子、末廣勇司、出嶋克史、吉田慶太、伊豆原るな、酒井奈緒子、三谷昌平
    • Organizer
      日本分子生物学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Regulation of aging by balancing mitochondrial function and antioxidant levels.2023

    • Author(s)
      Sawako Yoshina, Luna Izuhara, Shohei Mitani
    • Organizer
      日本生理学会
    • Related Report
      2022 Annual Research Report
  • [Book] 実験動物の技術と応用(入門編)2021

    • Author(s)
      吉名佐和子、三谷昌平(分担執筆)
    • Total Pages
      197
    • Publisher
      アドスリー、丸善
    • ISBN
      9784910513010
    • Related Report
      2021 Annual Research Report
  • [Book] 実験動物の技術と応用(実践編)2021

    • Author(s)
      吉名佐和子、三谷昌平(分担執筆)
    • Total Pages
      395
    • Publisher
      アドスリー、丸善
    • ISBN
      9784910513027
    • Related Report
      2021 Annual Research Report
  • [Remarks] 東京女子医科大学医学部生理学(分子細胞生理学分野)

    • URL

      https://www.twmu.ac.jp/physiol2/index.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] NBRP C. elegans

    • URL

      https://shigen.nig.ac.jp/c.elegans/

    • Related Report
      2022 Annual Research Report
  • [Remarks] 東京女子医科大学生理学(分子細胞生理学分野)

    • URL

      https://www.twmu.ac.jp/physiol2/index.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] ナショナルバイオリソースプロジェクト「実験動物 線虫」

    • URL

      https://shigen.nig.ac.jp/c.elegans/

    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] 線虫の培養用組成物、培養キット、及び線虫を用いた候補化合物のスクリ ーニング方法2024

    • Inventor(s)
      三谷昌平他
    • Industrial Property Rights Holder
      三谷昌平他
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2024-058069
    • Filing Date
      2024
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] ミトコンドリア保護剤、ミトコンドリア障害改善剤2020

    • Inventor(s)
      三谷他
    • Industrial Property Rights Holder
      三谷他
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2020 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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