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Analysis of Selective Autophagy Suppression by Adenoviral Proteins

Research Project

Project/Area Number 22K06082
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 InstitutionOsaka Metropolitan University

Principal Investigator

TSUCHIYA Megumi  大阪公立大学, 大学院工学研究科, 客員准教授 (00390691)

Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2024: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords選択的オートファジー / アデノウイルスタンパク / ウイルスベクター / 選択的オートファジーレセプター
Outline of Research at the Start

個々の細胞は外来の異物に対し、選択的オートファジーを利用した異物排除機構を備えており、この制御こそが免疫に頼らない新たな感染症対策になると期待される。申請者は異物排除において重要な役割を持つ選択的オートファジーレセプターp62が、アデノウイルスタンパクE1B-55Kによって機能が阻害されていることに着目し、ウイルス感染時に機能すべき選択的オートファジーの阻害機構を解明する。

Outline of Final Research Achievements

The selective autophagy receptor p62 functions to selectively degrade exogenous materials such as transfected nucleic acids. In HEK293 cells, p62 was found to directly bind to the adenoviral protein E1B, which impairs p62 function through direct interaction. Furthermore, inhibition of p62 phosphorylation promoted adenovirus replication. p62 is phosphorylated by TBK1, and its phosphorylated form contributes to maintaining TBK1 activity, forming a positive feedback mechanism. These findings demonstrate that selective autophagy mediated by p62, originally a mechanism for eliminating exogenous materials, also plays a role in regulating adenoviral infection.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、選択的オートファジーレセプターp62を中心とした外来核酸排除機構およびアデノウイルス感染に対する細胞防御機構を解明したものである。p62の機能制御により、遺伝子導入効率やウイルス感染効率が大きく変化することが判明した。これらの知見は、細胞防御機構の詳細な理解を深めるとともに、核酸導入医薬の効果を大幅に向上させる新たな戦略の基盤となる。今後、アデノウイルスベクターの効率的な産生や、これを用いたワクチン開発に大きく貢献すると期待される。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (3 results)

All 2024 2023 2022

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results)

  • [Journal Article] HKDC1, a target of TFEB, is essential to maintain both mitochondrial and lysosomal homeostasis, preventing cellular senescence2024

    • Author(s)
      Cui Mengying、Yamano Koji、Yamamoto Kenichi、Yamamoto-Imoto Hitomi、Yamamoto Takeshi、Matsui Sho、Shima Takayuki、Tsuchiya Megumi、Nishino Kohei、Layden Brian T.、Kato Hisakazu、Ogawa Hidesato、Oki Shinya、Okada Yukinori、Isaka Yoshitaka、Kosako Hidetaka、Matsuda Noriyuki、Yoshimori Tamotsu、Nakamura Shuhei (一部省略)
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 121 Issue: 2

    • DOI

      10.1073/pnas.2306454120

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] TBK1 inhibitors enhance transfection efficiency by suppressing p62/SQSTM1 phosphorylation2023

    • Author(s)
      Tsuchiya M, Kong W, Hiraoka Y, Haraguchi T, Ogawa H
    • Journal Title

      Genes to Cells

      Volume: 28(1) Issue: 1 Pages: 68-77

    • DOI

      10.1111/gtc.12987

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transcriptional coregulator Ess2 controls survival of post-thymic CD4<sup>+</sup> T cells through the Myc and IL-7 signaling pathways2022

    • Author(s)
      Takada Ichiro、Hidano Shinya、Takahashi Sayuri、Yanaka Kaori、Ogawa Hidesato、Tsuchiya Megumi、Yokoyama Atsushi、Sato Shingo、Ochi Hiroki、Nakagawa Tohru、Kobayashi Takashi、Nakagawa Shinichi、Makishima Makoto
    • Journal Title

      Journal of Biological Chemistry

      Volume: 298 Issue: 9 Pages: 102342-102342

    • DOI

      10.1016/j.jbc.2022.102342

    • URL

      https://pure.teikyo.jp/en/publications/13a6b124-16a1-4b76-be6e-449d8374b9cd

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2022-04-19   Modified: 2026-01-16  

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