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Whole-life tracing and cell-cell regulation in B cells

Research Project

Project/Area Number 19K22538
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 49:Pathology, infection/immunology, and related fields
Research InstitutionHiroshima University

Principal Investigator

YASUDA TOMOHARU  広島大学, 医系科学研究科(医), 教授 (40334429)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
KeywordsB細胞 / 免疫老化 / 免疫寿命 / 細胞老化 / 免疫応答 / リンパ腫 / 細胞分裂 / 体細胞変異 / 抗体 / クローン選択 / 老化 / 細胞寿命
Outline of Research at the Start

機能分化した細胞を生体内で不可逆かつ選択的に標識することで生涯追跡する技術を開発し、細胞寿命や分化、細胞の入れ替え速度、新旧細胞間相互作用を時間的要素を加えて解析する。これまで生まれた時期の区別なく解析されてきた細胞の機能的役割について、細胞年齢との関係性、あるいは形成時期が異なる細胞間における相互作用や競合を調べる。本研究では抗体産生機能を有したB細胞を対象に研究開発と解析を行うことで免疫記憶の成り立ちと抗体選択のメカニズムを明らかにする。このような解析を通じて個体生涯における細胞構成の変遷や相互制御を浮き彫りにし、個体老化や生理機能の理解に役立てる。

Outline of Final Research Achievements

Labeled EYFP-expressing B cells could be rejected by the immune system, however T cells were not activated and labeled B cells had not rejected by the immune system more than 180 days after labeling. Thus confirmed that the labeling of differentiated B cells and the absolute measurement of lifespan are possible using this system. As a result of tracking the labeled B cells for one year, we found that the B cells were replaced in a short period during young age, but the turnover decreased as aging. In addition, we succeeded to find that naive B cells that have not been activated by the antigen stay circulation in vivo for a much longer period of time than previously thought.

Academic Significance and Societal Importance of the Research Achievements

外来抗原に特異的な免疫記憶(抗体産生細胞、記憶B細胞、記憶T細胞から構成される)を形成する個々の細胞が維持される期間を明らかにすることは、免疫記憶の成り立ちを理解する根幹に関わりその重要性は明白である。記憶細胞の生存期間が定量化できるようになれば、生存期間ごとに細胞を解析できるようになるため特定細胞の長期生存を可能にする分子メカニズムに迫ることもできる。このような解析を進めていくことで免疫記憶の成り立ちや抗体選択のメカニズムのさらなる理解に貢献し、効果的なワクチン開発、アレルギーや自己免疫などの疾患治療に役立つことが期待できる。

Report

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

    (15 results)

All 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (8 results) (of which Invited: 7 results)

  • [Int'l Joint Research] Max Delbruck Center(ドイツ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Max Delbruck Center/Max Planck Institute(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Generation and characterization of CD19-iCre mice as a tool for efficient and specific conditional gene targeting in B cells.2021

    • Author(s)
      Yasuda T, Saito Y, Ono C, Kawata K, Baba A, Baba Y.
    • Journal Title

      Sci. Rep.

      Volume: 11 Issue: 1 Pages: 5524-5524

    • DOI

      10.1038/s41598-021-84786-6

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pathologically Relevant Mouse Models for Epstein-Barr Virus-Associated B Cell Lymphoma2021

    • Author(s)
      Huang Shiyu、Yasuda Tomoharu
    • Journal Title

      Frontiers in Immunology

      Volume: 12

    • DOI

      10.3389/fimmu.2021.639844

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A conserved PI(4,5)P2-binding domain is critical for immune regulatory function of DOCK82021

    • Author(s)
      Sakurai Tetsuya、Kukimoto-Niino Mutsuko、Kunimura Kazufumi、Yamane Nana、Sakata Daiji、Aihara Ryosuke、Yasuda Tomoharu、Yokoyama Shigeyuki、Shirouzu Mikako、Fukui Yoshinori、Uruno Takehito
    • Journal Title

      Life Science Alliance

      Volume: 4 Issue: 4 Pages: e202000873-e202000873

    • DOI

      10.26508/lsa.202000873

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Functional interplay of Epstein-Barr virus oncoproteins in a mouse model of B cell lymphomagenesis2020

    • Author(s)
      Sommermann Thomas、Yasuda Tomoharu、Ronen Jonathan、Wirtz Tristan、Weber Timm、Sack Ulrike、Caeser Rebecca、Zhang Jingwei、Li Xun、Chu Van Trung、Jauch Anna、Unger Kristian、Hodson Daniel J.、Akalin Altuna、Rajewsky Klaus
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 117 Issue: 25 Pages: 14421-14432

    • DOI

      10.1073/pnas.1921139117

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measuring protein synthesis during cell cycle by Azidohomoalanine (AHA) labeling and flow cytometric analysis.2019

    • Author(s)
      Imami K, Yasuda T.
    • Journal Title

      Bio-Protocol

      Volume: 1 Issue: 8 Pages: 1-7

    • DOI

      10.21769/bioprotoc.3215

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 抗原受容体と免疫細胞の維持機構2020

    • Author(s)
      保田朋波流
    • Organizer
      第一三共 消化器疾患セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 抗原受容体と免疫寿命のコントロール2020

    • Author(s)
      保田朋波流
    • Organizer
      広島市医師会 第135回学術講演会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] B cell division in the heterogeneous pre-tumor microenvironment is required for lymphoma development2020

    • Author(s)
      Tomoharu Yasuda, Klaus Rajewsky
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] EBウイルスとヒト免疫系の共生/共進化2019

    • Author(s)
      保田朋波流
    • Organizer
      中国四国ウイルス研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] EBV-LMP1による宿主抗原性転換と細胞傷害性T細胞分化2019

    • Author(s)
      保田朋波流
    • Organizer
      第1回 感染に起因する腫瘍の共同研究セミナー
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 抗原受容体とB細胞寿命2019

    • Author(s)
      保田朋波流
    • Organizer
      第65回 広島大学第二外科同門研修会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 抗原受容体シグナルとB細胞寿命2019

    • Author(s)
      保田朋波流
    • Organizer
      第46回 広島大学健康長寿研究拠点HiHAセミナー
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] EBウイルスとヒト免疫系の共生/共進化2019

    • Author(s)
      保田朋波流
    • Organizer
      広島免疫学リサーチセミナー
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2019-07-04   Modified: 2022-01-27  

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