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The role of transient receptor potential channels in developing invasive pneumococcal infection.

Research Project

Project/Area Number 19K08959
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54030:Infectious disease medicine-related
Research InstitutionWakayama Medical University

Principal Investigator

Sugita Gen  和歌山県立医科大学, 医学部, 講師 (20407274)

Co-Investigator(Kenkyū-buntansha) 大谷 真喜子  和歌山県立医科大学, 医学部, 講師 (00795594)
河野 正充  和歌山県立医科大学, 医学部, 講師 (20511570)
保富 宗城  和歌山県立医科大学, 医学部, 教授 (90336892)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords肺炎球菌 / 侵襲性肺炎球菌感染症 / TRP channel / インフルエンザウイルス / ニューモリシン / TRP / 肺炎球菌感染モデル / pnuemolysin (PLN) / 細菌感染症の成立と重症化 / TRPチャンネルの関与
Outline of Research at the Start

近年明らかになりつつある組織障害と創傷治癒における感覚神経に特異的に発現し侵害刺激受容に関わるイオンチャネル型受容体の関与:感覚神経transient receptor potential (TRP)チャンネルの関与について明らかにする。感染症の成立と重症化に組織炎症の制御を介するTRPチャンネルからのシグナルが関与することを解明することで、感染症の新しい病態の解明とそれに基づく新規治療予防へのパラダイムシフトと展開が期待できる。

Outline of Final Research Achievements

Transient receptor potential channels, neuronal stimulations widely known to be associated with thermal responses, pain induction and osmoregulation, have been shown in recent studies to have underlying mechanisms associated with inflammatory responses. It may vary among types of channels, however, it is not known how TRP channels function during pneumococcal infections. This study examined the role of Transient receptor potential Vanilloid (TRPV) 1 and TRPV4 for nasal colonization and subsequent development of invasive disease in a mouse model. Both TRPV1 and TRPV4 channels were related to regulation of the development of invasive diseases. In particular, the influx of neutrophils in the nasal cavity and the bactericidal activity were suppressed among TRPV4 knockout mice. This may lead to severe pneumonia, causing high mortality during influenza virus co-infection. Regulating host immune responses with TRP channels would be a novel strategy against various pathogenic microorganisms.

Academic Significance and Societal Importance of the Research Achievements

TRPチャネルは生体の恒常性を維持する非常に重要な機構の一つである。近年、病原微生物により惹起された炎症におけるTRPチャネルの関与が示唆されていたが、上気道感染症から全身感染症まで様々な感染症の原因菌となる肺炎球菌との関連については報告がなかった。本研究では侵襲性肺炎球菌感染症において、TRPチャネルが疾患の重症化を制御していることを動物モデルにより世界で初めて証明し、肺炎球菌感染症の重症化を予防するための新たな治療法開発における重要な基礎的知見を提供した。

Report

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

    (7 results)

All 2022 2021 2020 Other

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

  • [Int'l Joint Research] University of California San Diego(米国)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] The Roles of Transient Receptor Potential Vanilloid 1 and 4 in Pneumococcal Nasal Colonization and Subsequent Development of Invasive Disease.2021

    • Author(s)
      4.Kono M, Nanushaj D, Sakatani H, Murakami D, Hijiya M, Kinoshita T, Shiga T, Kaneko F, Enomoto K, Sugita G, Miyajima M, Okada Y, Saika S, Hotomi M
    • Journal Title

      Frontiers in Immunology

      Volume: 12 Pages: 732029-732029

    • DOI

      10.3389/fimmu.2021.732029

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 温痛覚受容体による鼻腔保菌から侵襲性肺炎球菌感染症への進展制御2022

    • Author(s)
      河野正充、酒谷英樹、村上大地、大谷真喜子、保富宗城
    • Organizer
      第2回日本耳鼻咽喉科免疫アレルギー感染症学会 総会・学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] The Roles of Transient Receptor Potential Vanilloid 1 and 4 in Pneumococcal Nasal Colonization and Invasive Disease2021

    • Author(s)
      Masamitsu Kono, Denisa Nanushaj, Hideki Sakatani, Daichi Murakami, Gen Sugita, Muneki Hotomi
    • Organizer
      The 3rd Asian Pneumococcal Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 肺炎球菌の保菌・感染・伝播のメカニズム2021

    • Author(s)
      河野正充
    • Organizer
      第91回日本感染症学会西日本地方会学術集会・第64回日本感染症学会中日本地方会学術集会・第69回日本化学療法学会西日本支部総会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 感染症研究の新たな展開:肺炎球菌の保菌と感染における感覚受容体の関与2021

    • Author(s)
      河野正充
    • Organizer
      第1回日本耳鼻咽喉科免疫アレルギー感染症学会 総会・学術講演会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] The Role of TRP in Pathogenesis of Streptococcus pneumoniae2020

    • Author(s)
      Denisa Nanushaj, Muneki Hotomi, Masamitsu Kono
    • Organizer
      International Symposium on TRP
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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

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