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Elucidation of the mechanism of heterochromatin-dependent transcriptional activation in piRNA clusters

Research Project

Project/Area Number 20K06596
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43050:Genome biology-related
Research InstitutionTokyo Metropolitan Geriatric Hospital and Institute of Gerontology (2021-2023)
The University of Tokyo (2020)

Principal Investigator

Kaoru Sato  地方独立行政法人東京都健康長寿医療センター(東京都健康長寿医療センター研究所), 東京都健康長寿医療センター研究所, 研究員 (20548507)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordspiRNA / Piwi / ヘテロクロマチン / ヒストン / エピジェネティクス / 生殖細胞 / piRNAクラスター / PIWI / トランスポゾン
Outline of Research at the Start

piRNAは近年発見された新規の少分子RNAであり、生殖細胞ゲノムをトランスポゾンなどの有害因子から保護する重要な機能を担う。piRNAはpiRNAクラスターと呼ばれるトランスポゾン断片が集積したゲノム領域から産生されるが、その領域はヘテロクロマチンヒストンマークであるH3K9me3であるにもかかわらず転写が活性化している。それには、Rhiという特殊なヘテロクロマチンタンパク質による認識が重要であることが示唆されているが、その仕組みは不明な点が多い。本研究では、Rhiがどのような仕組みでpiRNAクラスターのゲノム領域を他のH3K9me3リッチな領域と区別しているのか、分子レベルで解明する。

Outline of Final Research Achievements

PIWI-interacting RNAs (piRNAs) are a large group of small non-coding RNAs that are specifically produced in reproductive tissues to repress the expression of deleterious transposable elements and participate in the maintenance of germline genome integrity. In the Drosophila ovary, piRNAs are predominantly produced from piRNA clusters called dual-stranded piRNA clusters. Rhi plays an important role in their transcriptional activation. To elucidate the molecular machinery underlying Rhi-mediated transcriptional activation, this study used an engineered experimental system of cultured cells lacking Rhi expression. Ectopic expression of Rhi and nuclear piRNA factors resulted in the robust upregulation of dual-stread culsters. In addition, ChIP-seq experiments revealed the Rhi binding genomic sites of Rhi. Furthermore, the gene set required for the transcriptional activation of dual-strand clusters was identified.

Academic Significance and Societal Importance of the Research Achievements

piRNAは近年発見された新規の少分子RNAであり、生殖細胞ゲノムを保護する重要な機能を担う因子であり、piRNA産生に異常が生じると不稔となり、種の保存は成立しなくなる。piRNA研究には、大きくpiRNAの産生とトランスポゾン発現抑制機構に関する研究があり、本研究は前者に関連するものである。その中で、Dural-strandクラスターは生殖細胞piRNAの素となる前駆体RNAの産生の場であり、その中心因子であるRhiがどのような分子作用機序でそれらのゲノム領域を認識しているのかを明らかにした本研究は、学術的に重要な意義をもち、生殖機能を理解するうえでも社会的に非常に重要な研究成果である。

Report

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

    (12 results)

All 2023 2022 2021 2020

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Stress granule‐mediated <scp>RNA</scp> regulatory mechanism in Alzheimer's disease2023

    • Author(s)
      Sato Kaoru、Takayama Ken‐ichi、Inoue Satoshi
    • Journal Title

      Geriatrics &amp; Gerontology International

      Volume: 24 Issue: S1 Pages: 7-14

    • DOI

      10.1111/ggi.14663

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Expression and function of estrogen receptors and estrogen-related receptors in the brain and their association with Alzheimer’s disease2023

    • Author(s)
      Sato Kaoru、Takayama Ken-ichi、Inoue Satoshi
    • Journal Title

      Frontiers in Endocrinology

      Volume: 14 Pages: 1220150-1220150

    • DOI

      10.3389/fendo.2023.1220150

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Stress granules sequester Alzheimer’s disease-associated gene transcripts and regulate disease-related neuronal proteostasis2023

    • Author(s)
      Sato Kaoru、Takayama Ken-ichi、Inoue Satoshi
    • Journal Title

      Aging

      Volume: 15 Issue: 10 Pages: 3984-4011

    • DOI

      10.18632/aging.204737

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of piRNA biogenesis and its neuronal function in the development of neurodegenerative diseases2023

    • Author(s)
      Sato Kaoru、Takayama Ken-ichi、Inoue Satoshi
    • Journal Title

      Frontiers in Aging Neuroscience

      Volume: 15 Pages: 1157818-1157818

    • DOI

      10.3389/fnagi.2023.1157818

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transcriptional and Post-Transcriptional Regulations of Amyloid-β Precursor Protein (APP) mRNA2021

    • Author(s)
      Sato Kaoru、Takayama Ken-ichi、Hashimoto Makoto、Inoue Satoshi
    • Journal Title

      Frontiers in Aging

      Volume: 2 Pages: 721579-721579

    • DOI

      10.3389/fragi.2021.721579

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The piRNA pathway in <i>Drosophila</i> ovarian germ and somatic cells2020

    • Author(s)
      SATO Kaoru、SIOMI Mikiko C.
    • Journal Title

      Proceedings of the Japan Academy, Series B

      Volume: 96 Issue: 1 Pages: 32-42

    • DOI

      10.2183/pjab.96.003

    • NAID

      130007783757

    • ISSN
      0386-2208, 1349-2896
    • Year and Date
      2020-01-10
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Piwi suppresses transcription of Brahma-dependent transposons via Maelstrom in ovarian somatic cells2020

    • Author(s)
      Onishi Ryo、Sato Kaoru、Murano Kensaku、Negishi Lumi、Siomi Haruhiko、Siomi Mikiko C.
    • Journal Title

      Science Advances

      Volume: 6 Issue: 50

    • DOI

      10.1126/sciadv.aaz7420

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Mi-2 nucleosome remodeler and the Rpd3 histone deacetylase are involved in piRNA-guided heterochromatin formation2020

    • Author(s)
      Mugat Bruno、Nicot Simon、Varela-Chavez Carolina、Jourdan Christophe、Sato Kaoru、Basyuk Eugenia、Juge Fran?ois、Siomi Mikiko C.、P?lisson Alain、Chambeyron S?verine
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 108-120

    • DOI

      10.1038/s41467-020-16635-5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Stress granules sequester Alzheimer’s disease-associated gene transcripts in human neuronal cells.2023

    • Author(s)
      Sato Kaoru、Takayama Ken-ichi、Inoue Satoshi
    • Organizer
      IAGG-Asia Oceania Regional Congress 2023 (IAGG-AOR2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ヒト神経細胞におけるエストロゲン関連受容体ERRα/ERRγによるアルツハイマー型認知症関連遺伝子転写制御機構の解明2023

    • Author(s)
      Sato Kaoru、Takayama Ken-ichi、Inoue Satoshi
    • Organizer
      ERRセミナー
    • Related Report
      2023 Annual Research Report
  • [Presentation] ストレス顆粒による神経細胞RNA代謝および認知症病態制御メカニズムの解明2022

    • Author(s)
      佐藤薫
    • Organizer
      第12回老化機構チームセミナー
    • Related Report
      2022 Research-status Report
  • [Presentation] ヒト神経芽細胞腫SH-SY5Y細胞におけるeCLIP-seq法を用いたストレス顆粒中核因子G3BP1およびG3BP2結合RNAの網羅的解析2022

    • Author(s)
      佐藤薫、高山賢一、井上聡.
    • Organizer
      MBSJ2022
    • Related Report
      2022 Research-status Report

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

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