• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study on pathogenesis of invasive pneumococcal disease by different serotypes

Research Project

Project/Area Number 21K08503
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 InstitutionToyama Institute of Health

Principal Investigator

Oishi Kazunori  富山県衛生研究所, その他部局等, 所長 (80160414)

Co-Investigator(Kenkyū-buntansha) 金谷 潤一  富山県衛生研究所, 細菌部, 主任研究員 (80463131)
磯部 順子  富山県衛生研究所, 細菌部, 上席専門員 (10421893)
安居 輝人  国立研究開発法人医薬基盤・健康・栄養研究所, 医薬基盤研究所 感染症制御プロジェクト, プロジェクトリーダー (60283074)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords肺炎球菌 / 血清型 / 侵襲性ポテンシャル / ヒト微小脳血管内皮細胞 / 細胞間移動能 / 血液脳関門バリア / 髄膜炎 / 細胞内侵入能 / 髄膜炎発症 / RNA seq解析 / 莢膜 / 脳微小血管内皮細胞 / 経細胞間移動 / 経細胞侵入 / 菌細胞間移動 / トランスクリプトーム / 侵襲性肺炎球菌感染症 / 経細胞間移動能 / トランスクリプトーム解析 / プロテオーム解析
Outline of Research at the Start

本研究では菌の血清型によって侵襲性及び病型の違いが生じる機序を、異なる血清型の菌と生体内関門細胞(①ヒト鼻腔上皮、②ヒト血管内皮、③ヒト脳微小血管内皮)のin vitroにおける経細胞間移動能を解析することにより明らかにする。さらに、菌が①~③の生体内関門を通過する際に発現する細胞のトランスクリプトーム及びプロテオーム解析を行うことで、肺炎球菌の侵襲性に関与する膜蛋白質分子を同定する。

Outline of Final Research Achievements

A recent study reported that pneumococcal serotypes of 10A and 23A were associated with a high risk of developing bacterial meningitis among adults (Chang B, Sci Rep, 2022). We investigated the differences of invasiveness by pneumococcal serotypes using an in vitro Transwell chamber where the human brain microvascular endothelial cells (TY09 cells) were cultured as a model of cerebrospinal fluid barrier. The %BT (mean) differed between serotypes: Serotype 23A (0.38) was significantly higher than serotypes 3 (0.03) and 12F (0.14). Serotype 10A (0.31) was also significantly higher than serotype 3. Our results may suggest that the capability of bacterial transcytosis differs by serotypes, and pneumococcal strain with serotypes 10A or 23A are highly capable of passing the cerebrospinal fluid barrier, leading to the development of bacterial meningitis.

Academic Significance and Societal Importance of the Research Achievements

肺炎球菌血清型による侵襲性ポテンシャルに違いあることは知られているが、この所見に関する菌側の科学的知見はほとんど無い。本研究で示した血清型10A, 23Aがヒト微小脳血管内皮細胞の細胞間移動能が高い所見は、これらの血清型が成人で髄膜炎を発症しやすい疫学所見を支持しており学術的意義、また社会的意義がある。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Pneumococcal meningitis in adults in 2014-2018 after introduction of pediatric 13-valent pneumococcal conjugate vaccine in Japan.2022

    • Author(s)
      Chang B, Tamura K, Fujikura H, Watanabe H, Tanabe Y, Kuronuma K, Fujita J, Oshima K, Maruyama T, Abe S, Kasahara K, Nishi J, Kubota T, Kinjo Y, Serizawa Y, Shimbashi R, Fukusumi M, Shimada T, Sunagawa T, Suzuki M, Oishi K; Adult IPD Study Group.
    • Journal Title

      Sci Rep.

      Volume: 12 Issue: 1 Pages: 3066-3066

    • DOI

      10.1038/s41598-022-06950-w

    • Related Report
      2023 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dynamic changes in clinical characteristics and serotype distribution of invasive pneumococcal disease among adults in Japan after introduction of the pediatric 13-valent pneumococcal conjugate vaccine in 2013-2019.2022

    • Author(s)
      Tamura K, Chang B, Shimbashi R, Watanabe H, Tanabe Y, Kuronuma K, Oshima K, Maruyama T, Fujita J, Abe S, Kasahara K, Nishi J, Kubota T, Kinjo Y, Fujikura H, Fukusumi M, Shimada T, Sunagawa T, Suzuki M, Yamamoto Y, Oishi K.
    • Journal Title

      Vaccine

      Volume: 40 Issue: 24 Pages: 3338-3344

    • DOI

      10.1016/j.vaccine.2022.04.062

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ワークショップ1.進化する肺炎球菌:診断、病原性、次世代ワクチン.肺炎球菌の経細胞間移動能および細胞間侵入能の評価.2023

    • Author(s)
      金谷潤一、前西絵美、田村恒介、磯部順子、大石和徳.
    • Organizer
      第96回日本細菌学会(姫路市)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Increased transcytosis of Streptococcus pneumoniae serotypes 10A and 23A across human brain microvascular endothelial cells: a possible implication of developing bacterial meningitis.2023

    • Author(s)
      Jun-ichi Kanatani, Emi Maenishi, Kaho Ikeda, Keiko Kimata, Kazuki Saito, Junko Isobe, Kazunori Oishi.
    • Organizer
      The fourth Asian Pneumococcal Symposium (Seoul, South Korea).
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 進化する肺炎球菌:診断、病原性、次世代ワクチン.肺炎球菌の経細胞間移動能および細胞間侵入能の評価.2023

    • Author(s)
      金谷潤一、前西絵美、田村恒介、磯部純子、大石和徳.
    • Organizer
      第96回日本細菌学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Bacterial transcytosis of Streptococcus pneumoniae across the host cells: an in vitro model for analysis of invasive potential2021

    • Author(s)
      Jun-ichi Kanatani, Emi Maenishi, Junko Isobe, Kazunori Oishi.
    • Organizer
      The 3rd Asian Pneumococcal Symposium
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi