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Initiation mechanisms of apoptosis for elimination of oxiditively damaged RNA

Research Project

Project/Area Number 20K06495
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionKamakura Women's University (2021-2022)
Fukuoka Dental College (2020)

Principal Investigator

Ishii Takashi  鎌倉女子大学, 家政学部, 准教授 (70516731)

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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords酸化ストレス / 酸化損傷 / 8-oxoG / RNA / アポトーシス / 老化 / 神経変性疾患 / PCBP1 / AUF1 / PCBP2 / RNA分解 / RNA結合タンパク質
Outline of Research at the Start

酸化ストレスによるmRNAの酸化損傷は老化や神経変性疾患を含む様々な疾患の原因になると考えられている。この危機を回避するために、細胞は何らかの生体防御機構を有していると考えられる。
その機構を明らかにするために、我々は酸化損傷を受けたRNAを特異的に認識して結合するタンパク質PCBP1の機能解析を行う。
その研究成果を手掛かりに、老化や神経変性疾患発症におけるPCBP1の機能解明を目指したい。

Outline of Final Research Achievements

Oxidative stress induces loss of homeostasis through the oxidation of various types of biomolecules. As a result, aging and neurodegenerative diseases are thought to occur. In our study, we searched for factors involved in elimination of oxidized RNA. Oxidatively damaged RNA causes abnormalities in the transduction of genetic information, which causes disruption of cell homeostasis. Research results revealed that two proteins, PCBP1 and PCBP2, act in the mechanism of apoptotic elimination of cells that have produced oxidatively damaged RNA. In addition, as evidence to support this, it has been revealed that the expression level of PCBP2 is downregulated in brain neurons of patients who develop neurodegenerative diseases.

Academic Significance and Societal Importance of the Research Achievements

酸化損傷塩基8-oxoGが生じると遺伝情報の正確な伝達が行われなくなる。その結果、DNAの変異による遺伝子疾患(がん等)や、RNAの変異による異常タンパク質合成が引き金となる老化や神経変性疾患(アルツハイマー病や認知症等)が誘導される。この危機を回避するために、生物は様々な機構を使って8-oxoGを排除している。その1つとして、我々はPCBP1とPCBP2による酸化損傷RNA排除機構の存在を明らかにした。この機構は、重度の酸化損傷を受けたRNAを持つ細胞をアポトーシスにより排除することで生体の恒常性維持に働くと考えられる。

Report

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

    (5 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (2 results) (of which Invited: 1 results)

  • [Journal Article] Involvement of Gtr1p in the oxidative stress response in yeast Saccharomyces cerevisiae2022

    • Author(s)
      Sekiguchi Takeshi、Ishii Takashi、Kamada Yoshiaki、Funakoshi Minoru、Kobayashi Hideki、Furuno Nobuaki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 598 Pages: 107-112

    • DOI

      10.1016/j.bbrc.2022.02.016

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] WDR35 is involved in subcellular localization of acetylated tubulin in 293T cells2021

    • Author(s)
      Sekiguchi Takeshi、Ishii Takashi、Kobayashi Hideki、Furuno Nobuaki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 547 Pages: 169-175

    • DOI

      10.1016/j.bbrc.2021.01.092

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] PCBP1 and PCBP2 both bind heavily oxidized RNA but cause opposing outcomes, suppressing or increasing apoptosis under oxidative conditions2020

    • Author(s)
      Ishii Takashi、Igawa Tatsuhiro、Hayakawa Hiroshi、Fujita Tsugumi、Sekiguchi Mutsuo、Nakabeppu Yusaku
    • Journal Title

      Journal of Biological Chemistry

      Volume: 295 Issue: 34 Pages: 12247-12261

    • DOI

      10.1074/jbc.ra119.011870

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] PCBP2 is down regulated in degenerating neurons and rarely observed in skein-like inclusions in ALS2022

    • Author(s)
      吉村 基、 本田 裕之、 笹ケ迫 直一、 森 慎一郎、 石井 健士、 二宮 利治、 磯部 紀子、 岩城徹
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] RNAの酸化損傷に対する生体防御機構2020

    • Author(s)
      石井 健士
    • Organizer
      福岡歯科大学学会総会
    • Related Report
      2020 Research-status Report
    • Invited

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

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