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Elucidation of the contribution of increased linear ubiquitin chain signaling to autoimmune diseases

Research Project

Project/Area Number 22K15379
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionKyoto University

Principal Investigator

Fuseya Yasuhiro  京都大学, 医学研究科, 特定助教 (60866523)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
KeywordsLUBAC / HOIL-1L / 直鎖状ユビキチン鎖 / SLE / シェーグレン症候群 / NF-kappaB / linear ubiquitin chain / Sjogren's syndrome / RBCK1 / 自己免疫疾患
Outline of Research at the Start

直鎖状ユビキチン鎖を生成するLUBACはHOIP、HOIL-1L、SHARPINの三者複合体からなり、LUBACは直鎖を生成するHOIP以外に、HOIL-1Lもリガーゼ活性を有する。応募者はHOIL-1LリガーゼがLUBACの生理機能を抑制することを解明し、HOIL-1Lのリガーゼ機能を低下させることでLUBACの機能が亢進するマウスを作出したところ、全身性エリテマトーデス(SLE)に特徴的な腎炎を来すことを見出している。本研究ではLUBAC機能亢進による自己免疫疾患発症への寄与とその治療応用へ向けた基礎検討を行う。

Outline of Final Research Achievements

We showed that LUBAC ubiquitin ligase complex, which activates immune cells by generating linear ubiquitin chains is involved in the pathogenesis of systemic lupus erythematosus (SLE) and Sjogren's syndrome (SS). We had previously discovered that inhibition of the enzymatic activity of HOIL-1L, an accessory subunit of LUBAC, enhances LUBAC function.
We recently found that HOIL-1L enzyme deficiency in mice causes SLE and SS-like symptoms through enhanced linear ubiquitin chain formation, and that in humans, a single nucleotide variant (SNV) in the HOIL-1L gene that enhances LUBAC activity is significantly enriched in SLE patients. So, we identified HOIL-1L is a brand-new susceptibility gene for SLE.

Academic Significance and Societal Importance of the Research Achievements

マウス及びヒトの解析を駆使した本研究によって、LUBACの機能亢進による直鎖状ユビキチン鎖生成亢進が、炎症シグナルを活性化させることで、代表的な自己免疫疾患の一つであるSLEの発症に繋がることが明らかとなった。この結果はLUBACの機能を阻害することができればSLEの新規治療に繋がる可能性があることを示唆するものである。

Report

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

    (7 results)

All 2024 2023 2022 Other

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (2 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Attenuation of HOIL-1L ligase activity promotes systemic autoimmune disorders by augmenting linear ubiquitin signaling2024

    • Author(s)
      Fuseya Yasuhiro、Kadoba Keiichiro、Liu Xiaoxi、Suetsugu Hiroyuki、Iwasaki Takeshi、Ohmura Koichiro、Sumida Takayuki、Kochi Yuta、Morinobu Akio、Terao Chikashi、Iwai Kazuhiro
    • Journal Title

      JCI Insight

      Volume: 9 Issue: 3

    • DOI

      10.1172/jci.insight.171108

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Myofiber-type-dependent ‘boulder’ or ‘multitudinous pebble’ formations across distinct amylopectinoses2024

    • Author(s)
      Mitra Sharmistha、Chen Baozhi、Shelton John M.、Nitschke Silvia、Wu Jun、Covington Lindsay、Dear Mathew、Lynn Tori、Verma Mayank、Nitschke Felix、Fuseya Yasuhiro、Iwai Kazuhiro、Evers Bret M.、Minassian Berge A.
    • Journal Title

      Acta Neuropathologica

      Volume: 147 Issue: 1

    • DOI

      10.1007/s00401-024-02698-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ABIN1 is a signal‐induced autophagy receptor that attenuates NF‐κB activation by recognizing linear ubiquitin chains2022

    • Author(s)
      Shinkawa Y, Imami K, Fuseya Y, Sasaki K, Ohmura K, Ishihama Y, Morinobu A, Iwai K.
    • Journal Title

      FEBS Letters

      Volume: In press Issue: 9 Pages: 1147-1164

    • DOI

      10.1002/1873-3468.14323

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Linear ubiquitin chains and autoimmune diseases2024

    • Author(s)
      伏屋康寛
    • Organizer
      Cell Biology, Developmental Biology, and Systems Biology Course Meeting 2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 直鎖状ユビキチン鎖と自己免疫疾患2023

    • Author(s)
      伏屋康寛
    • Organizer
      第13回シグナルネットワーク研究会
    • Related Report
      2023 Annual Research Report
  • [Book] 炎症と免疫2023

    • Author(s)
      伏屋康寛
    • Total Pages
      6
    • Publisher
      先端医学社
    • ISBN
      9784865505924
    • Related Report
      2023 Annual Research Report
  • [Remarks] 自己免疫疾患の発症メカニズムの一端を解明―自己免疫疾患の新規治療ターゲットへ―

    • URL

      https://www.kyoto-u.ac.jp/ja/research-news/2024-02-09-0

    • Related Report
      2023 Annual Research Report

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Published: 2022-04-19   Modified: 2025-01-30  

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