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Novel Approach to Prevent Joint Destruction through Targeting the Autophagy Receptor Optineurin

Research Project

Project/Area Number 20K08791
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54020:Connective tissue disease and allergy-related
Research InstitutionHokkaido University

Principal Investigator

Kato Masaru  北海道大学, 大学病院, 講師 (10755896)

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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords関節リウマチ / 滑膜線維芽細胞 / オートファジー受容体 / オプチニューリン / オートファジー
Outline of Research at the Start

本研究では、オートファジー受容体の1つであるオプチニューリンを標的とし、関節リウマチの新規治療法を開発することを目的とし、以下の実験を実施する。1. 滑膜線維芽細胞の分離、培養、2. オプチニューリンのノックダウン、滑膜線維芽細胞と単球の共培養、3. オステオプロテゲリンの発現解析、4. トランスクリプトーム解析、パスウェイ解析、5. オプチニューリンの翻訳後修飾解析、6. 関節炎モデルにおけるオプチニューリンのノックダウン。

Outline of Final Research Achievements

This study has clarified that in synovial fibroblasts, (1) downregulating optineurin, one of the autophagy receptors, leads to the activation of NF-kappaB signaling pathway and the dysregulation of molecules related to cartilage destruction and bone repair and (2) TNF and INF-gamma increase the phosphorylation of optineurin. Moreover, the role of another autophagy receptor p62 in the citrullination of intracellular proteins was evaluated. These results are novel findings in the therapeutic approach to rheumatoid arthritis, particularly in the inhibition of joint destruction and protein citrullination, and suggest autophagy receptors as novel therapeutic targets.

Academic Significance and Societal Importance of the Research Achievements

関節リウマチはシトルリン化タンパク質に対する自己免疫、増殖性滑膜炎、関節破壊の3つで特徴づけられる疾患であるが、今回の研究成果はオプチニューリンやp62といったオートファジー受容体が関節破壊およびシトルリン化タンパク質に対する自己免疫にかかわっていることを示唆するものであり、関節リウマチの新たな治療戦略を立てるのみならず、いまだ明らかとなっていない関節リウマチの病態を解明する上での基盤となると考えられる。

Report

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

    (2 results)

All 2021 2020

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

  • [Journal Article] Protective Role of Optineurin Against Joint Destruction in Rheumatoid Arthritis Synovial Fibroblasts2020

    • Author(s)
      Lee Wen Shi、Kato Masaru、Sugawara Eri、Kono Michihiro、Kudo Yuki、Kono Michihito、Fujieda Yuichiro、Bohgaki Toshiyuki、Amengual Olga、Oku Kenji、Yasuda Shinsuke、Onodera Tomohiro、Iwasaki Norimasa、Atsumi Tatsuya
    • Journal Title

      Arthritis & Rheumatology

      Volume: 72 Issue: 9 Pages: 1493-1504

    • DOI

      10.1002/art.41290

    • NAID

      120007145365

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Optineurin in synovial fibroblasts protects the joint by suppressing osteoclastogenesis in rheumatoid arthritis2021

    • Author(s)
      Masaru Kato, Wenshi Lee, Michihito Kono, Yuichiro Fujieda, Kenji Oku, Shinsuke Yasuda, Olga Amengual, Tatsuya Atsumi
    • Organizer
      12th International Congress on Autoimmunity
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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

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