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Elucidation of molecular mechanisms of monocyte activation through TLR signaling in Sjögrens syndrome.

Research Project

Project/Area Number 19K08919
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 InstitutionKeio University

Principal Investigator

Ikeda Yumi  慶應義塾大学, 医学部(信濃町), 研究員 (70826156)

Co-Investigator(Kenkyū-buntansha) 吉本 桂子  慶應義塾大学, 医学部(信濃町), 研究員 (20383292)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
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)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsシェーグレン症候群 / 単球 / Toll様受容体 / BAFF受容体 / 組織傷害 / TLR
Outline of Research at the Start

申請者らはこれまでの知見よりSS単球のBAFFによるBR3を介した活性化が病態形成において極めて重要な役割を担っており、単球におけるBR3発現亢進が抑制されれば単球におけるBAFFシグナルが抑制されBAFFによる組織障害分子の産生が抑制されSSにおける組織障害の抑制及び改善につながると仮説した。さらにヒト単球細胞株をTLR ligandsで刺激した場合、細胞上のBR3発現が亢進すること、Toll様受容体(TLR)の発現がSS患者の単球において亢進していることを見出した。本研究ではSS患者単球におけるTLRを介したシグナルが関与するBR3発現亢進機序を解明し新規治療標的とその阻害剤の探索を行う。

Outline of Final Research Achievements

The purpose of this study is to clarify the regulatory mechanisms of elevated expression of BAFF receptor(BR3) in monocytes and search novel therapeutic targets for Sjogren’s syndrome (SS). In our previous study, we found that BR3 expression was elevated in peripheral SS monocytes and that elevation was correlated with clinical parameters of patients. It has been reported that signaling pathways via TLRs are involved in onset and/or development of SS and that monocytes expressing TLRs play a crucial role in the pathogenesis of the disease. In this study, we focused on TLR4 and investigated possible involvement of signaling pathways of TLR4 in enhanced expression of BR3 in human monocytes. As a results, we found that TLR4 expression was elevated in SS monocytes and phosphorylation of several TLR4 signaling molecules were upregulated by LPS stimulated monocytes These findings suggest that these molecules may be involved in the pathogenesis of SS.

Academic Significance and Societal Importance of the Research Achievements

研究代表者らのこれまでの研究成果より、単球におけるTLR発現亢進に起因したBR3発現異常が単球を活性化しSS患者の病変部位の組織障害を引き起こすという独自の仮説に基づく病態解明の取り組みは新規治療標的の探索を可能にし、極めて独自性、新規性、創造性が高いと考える。本研究の成果はSS病態形成機序の解明に伴う、新たな治療標的タンパク質の探索及び同定につながり、標的タンパク質の作用を制御する化合物はSS根治的治療薬のシーズとなり得る。よって本研究は学術的に有意義であるばかりでなく、根治療薬の存在しない免疫難病分野への新規治療薬の提供という点において社会的貢献度も高い。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (17 results)

All 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (16 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Elevated expression of BAFF receptor, BR3, on monocytes correlates with B cell activation and clinical features of patients with primary Sjogren’s syndrome2020

    • Author(s)
      Yoshimoto Keiko、Suzuki Katsuya、Takei Eriko、Ikeda Yumi、Takeuchi Tsutomu
    • Journal Title

      Arthritis Research & Therapy

      Volume: 22 Issue: 1

    • DOI

      10.1186/s13075-020-02249-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 原発性シェーグレン症候群患者末梢血単球ではTLR4シグナル経路の活性化がBAFF受容体発現亢進に寄与する2021

    • Author(s)
      池田由美、吉本桂子、鈴木勝也、武井江梨子、竹内 勤
    • Organizer
      第65回日本リウマチ学会総会・学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 原発性シェーグレン症候群患者末梢血単球におけるBAFFシグナルとイオンチャンネルのクロストーク機構の解析2021

    • Author(s)
      吉本桂子、鈴木勝也、池田由美、武井江梨子、竹内 勤
    • Organizer
      第65回日本リウマチ学会総会・学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 病態モデルマウスを用いた全身性エリテマトーデスにおけるB細胞異常に関する解析2021

    • Author(s)
      峯岸恵美、田中祐樹、吉本桂子、池田由美、大友耕太郎、鈴木勝也、竹内 勤
    • Organizer
      第65回日本リウマチ学会総会・学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 全身エリテマトーデス病態モデルマウスにおけるT細胞機能異常に関する検討2021

    • Author(s)
      田中祐樹、峯岸恵美、吉本桂子、池田由美、大友耕太郎、鈴木勝也、竹内 勤
    • Organizer
      第65回日本リウマチ学会総会・学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Activation of signaling pathways of Toll-like receptor 4 promotes expression of BAFF receptor, BR3 in CD14+CD16+ human monocytes.2021

    • Author(s)
      Yumi Ikeda, Keiko Yoshimoto, Katsuya Suzuki, Eriko Takei, Tsutomu Takeuchi
    • Organizer
      23rd APLAR Asia-Pasific League of Associations of Rheumatology Congress
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] BAFF-BAFF receptor, BR3, axis is involved in activation of monocytes via NF-kB pathways and assists B cell activation in patients with primary Sjogren’s syndrome.2021

    • Author(s)
      Keiko Yoshimoto, Katsuya Suzuki, Yumi Ikeda, Eriko Takei, Tsutomu Takeuchi
    • Organizer
      23rd APLAR Asia-Pasific League of Associations of Rheumatology Congress
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 原発性シェーグレン症候群患者末梢血単球でのBAFF受容体発現亢進におけるTLR4シグナルの関与2021

    • Author(s)
      池田由美、吉本桂子、鈴木勝也、武井江梨子、竹内 勤、金子 祐子
    • Organizer
      第8回JCRベーシックリサーチカンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] Signaling pathways via Toll-like receptor 4 are involved in enhanced expression of BAFF receptor in CD14+CD16+ human monocytes.2021

    • Author(s)
      Yumi Ikeda, Keiko Yoshimoto, Katsuya Suzuki, Eriko Takei, Tsutomu Takeuchi
    • Organizer
      第50回日本免疫学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Possible involvement of the voltage-gated sodium channel 1.7 in activation of BAFF signaling in monocytes of patients with primary Sjogren’s syndrome.2021

    • Author(s)
      Keiko Yoshimoto, Katsuya Suzuki, Yumi Ikeda, Eriko Takei, Tsutomu Takeuchi
    • Organizer
      第50回日本免疫学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 原発性シェーグレン症候群患者末梢血単球でのBAFF受容体発現亢進にはTLR4シグナル経路が関与する2021

    • Author(s)
      池田由美、吉本桂子、鈴木勝也、武井江梨子、竹内 勤
    • Organizer
      第29回日本シェーグレン症候群学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] シェーグレン症候群末梢血単球でのBAFF誘導IL-6産生機構におけるNav1.7チャンネルの関与2021

    • Author(s)
      吉本桂子、鈴木勝也、池田由美、武井江梨子、竹内 勤
    • Organizer
      第29回日本シェーグレン症候群学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 原発性シェーグレン症候群患者末梢血単球ではTLR4シグナル経路の活性化がBAFF受容体発現亢進に寄与する2020

    • Author(s)
      池田由美、吉本桂子、鈴木勝也、武井江梨子、竹内 勤
    • Organizer
      第64回日本リウマチ学会総会・学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] 原発性シェーグレン症候群患者末梢血単球でのBAFF受容体発現亢進はB細胞活性化および臨床的特徴に関与する2020

    • Author(s)
      吉本桂子、鈴木勝也、武井江梨子、池田由美、竹内 勤
    • Organizer
      第64回日本リウマチ学会総会・学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Signaling pathways via Toll-like receptor 4 are involved in elevated expression of BAFF receptor in monocytes.2020

    • Author(s)
      Yumi Ikeda, Keiko Yoshimoto, Katsuya Suzuki, Eriko Takei, Tsutomu Takeuchi
    • Organizer
      22nd Asia-Pacific League of Associations for Rheumatology Congress
    • Related Report
      2020 Research-status Report
  • [Presentation] Elevated expression levels of the voltage-gated sodium channel 1.7 and BAFF receptor in peripheral monocytes contribute to activation of monocytes of patients with primary Sjögren’s syndrome.2019

    • Author(s)
      Keiko Yoshimoto, Yumi Ikeda, Katsuya Suzuki and Tsutomu Takeuchi
    • Organizer
      Immunology 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ELEVATED EXPRESSION OF BAFF-RECEPTOR IN PERIPHERAL MONOCYTES PROMOTES B CELL ACTIVATION AND CORRELATES WITH CLINICAL MANIFESTATIONS OF PRIMARY SJÖGREN’S SYNDROME.2019

    • Author(s)
      Keiko Yoshimoto, Katsuya Suzuki, Yumi Ikeda, Eriko Takei, Tsutomu Takeuchi
    • Organizer
      EULAR 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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