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Identification of novel inducers that trigger pro-inflammatory hematopoietic responses

Research Project

Project/Area Number 22K19425
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 InstitutionTokyo Medical and Dental University

Principal Investigator

Kanayama Masashi  東京医科歯科大学, 難治疾患研究所, 准教授 (80811223)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords感染 / 造血 / サイトカイン / IL-10 / 炎症 / B細胞 / 自然免疫 / 感染症
Outline of Research at the Start

IL-10は代表的な抑制性(抗炎症性)サイトカインとして知られており、免疫系においては
炎症性サイトカインに拮抗する分子として過剰な炎症の抑制や恒常性の維持に寄与してい
る。しかしながら造血、特に感染症などの生体ストレスによって誘導される造血応答に及ぼすIL-10の機能はよく理解されていない。本研究ではストレス誘導性の造血応答におけるIL-10の病態生理学的な役割をを生体内で検証することを目的とする。

Outline of Final Research Achievements

Innate immune cells are essential to protect host from infection. During systemic infection, therefore, the production of innate immune cells are dramatically increased through a hematopoietic response called emergency myelopoiesis. In this study, we newly identified IL-10 as a novel factor to enhance EM during infection. We found that, in the bone marrow of infected mice, B cells act as a major source of IL-10, which stimulated the survival and myeloid cell generation of hematopoietic progenitors and enhanced EM. Indeed, we used a mouse model and confirmed that IL-10-deficiency in B cells reduced the supply of innate immune cells and weakened the elimination of invaded pathogen.

Academic Significance and Societal Importance of the Research Achievements

本研究では、これまで炎症抑制的なサイトカインとして知られていたIL-10が、造血系においては自然免疫細胞の産生増強を介して炎症促進的に働くことを見出した。これはIL-10の機能における新たな知見を与えるものである。IL-10やその産生細胞を用いた免疫抑制療法の開発は世界中で進められているが、本研究の成果はIL-10を用いた治療法の使用するタイミングや疾患を慎重に選択する必要があることを示唆している。また、本研究の成果は比較的新しいシステムである獲得免疫が、自然免疫細胞の産生機構と協調的な進化を遂げてきたことを示しており、生命の進化を考察する上でも非常に興味深いものである。

Report

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

    (13 results)

All 2024 2023 2022 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (9 results) (of which Invited: 4 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] Heidelberg University Hospital(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Myeloid-like B cells boost emergency myelopoiesis through IL-10 production during infection2023

    • Author(s)
      Masashi Kanayama, Yuta Izumi, Megumi Akiyama, Toyoki Hayashi, Koji Atarashi, Axel Roers, Taku Sato and Toshiaki Ohteki
    • Journal Title

      Journal of Experimental Medicine

      Volume: 220 Issue: 4

    • DOI

      10.1084/jem.20221221

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Myeloid-like B cells boost emergency myelopoiesis through IL-10 production during infection2024

    • Author(s)
      Masashi Kanayama
    • Organizer
      第19回麒麟塾
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 全身的な感染症における自然免疫細胞の産生と挙動2023

    • Author(s)
      金山 剛士
    • Organizer
      第96回日本生化学会大会 シンポジウム
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Myeloid-like B cells protect the host by boosting myelopoiesis during infection2023

    • Author(s)
      Masashi Kanayama
    • Organizer
      JSICR/MMCB 2023 合同シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] A novel B cell subset boosts myelopoiesis during infection2023

    • Author(s)
      Masashi Kanayama
    • Organizer
      第85回日本血液学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Myeloid-like B cells protect the host by boosting myelopoiesis during infection2023

    • Author(s)
      Masashi Kanayama
    • Organizer
      JSICR/MMCB 2023合同シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] 感染症におけるB細胞を介した自然免疫細胞産生の強化2023

    • Author(s)
      金山剛士
    • Organizer
      第32回 Kyoto T Cell Conference (KTCC)
    • Related Report
      2022 Research-status Report
  • [Presentation] A novel B cell subset boosts emergency myelopoiesis during infection2023

    • Author(s)
      Masashi Kanayama
    • Organizer
      第85回日本血液学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Generation and behavior of myeloid cells during sepsis2023

    • Author(s)
      Masashi Kanayama
    • Organizer
      第96回日本生化学会大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] B cell: an amplifier of myeloid cell production triggered by infection2022

    • Author(s)
      Masashi Kanayama
    • Organizer
      第51回 日本免疫学会学術集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Book] 実験医学増刊「免疫細胞サブセット」(予定)2024

    • Author(s)
      金山 剛士
    • Total Pages
      6
    • Publisher
      羊土社
    • Related Report
      2023 Annual Research Report
  • [Remarks] 「感染時に出現する調節性B細胞が自然免疫細胞の供給を高めることを発見」【樗木俊聡 教授】

    • URL

      https://www.tmd.ac.jp/press-release/20230201-1/

    • Related Report
      2023 Annual Research Report

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Published: 2022-07-05   Modified: 2025-01-30  

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