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

Analysis of susceptibility to bacterial secondary infection associated with influenza virus infection and establishment of preventive methods

Research Project

Project/Area Number 20K08846
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 InstitutionShowa University

Principal Investigator

Ishikawa Hiroki  昭和大学, 医学部, 准教授 (60433918)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywordsインフルエンザウイルス / 細菌二次感染 / 乳酸菌産生多頭体 / 接着因子 / タイトジャンクション / 炎症性サイトカイン / 抗インフルエンザウイルス薬 / 乳酸菌産生多糖体 / インフルエンザウイルス感染
Outline of Research at the Start

我々はこれまでに、インフルエンザウイルス感染に伴う肺への二次性細菌感染の易感染性について検討をおこなってきた。その結果、ウイルス感染後の細菌易感染性は宿主細菌排除能減弱、すなわち肺中の好中球貪食殺菌能低下に起因することを明らかにした。本研究ではさらに2つの点から研究を遂行する。まずウイルス感染によるG-CSF産生低下のメカニズム解明およびその他の原因究明について研究を遂行する。2点目として臨床的観点から、ウイルス感染に伴う細菌排除能低下は、抗インフルエンザウイルス薬早期投与またはワクチン接種による迅速なウイルス排除が好中球の細菌排除機能維持ひいては二次性細菌性肺炎予防に寄与するか明らかにする。

Outline of Final Research Achievements

In this study, we investigated in vitro the mechanism of susceptibility to bacterial secondary infection caused by influenza virus infection and methods for its prevention. As a result, influenza virus infection increased the expression level of the CEACAM-1 molecule gene, which bacteria use for adhesion to cells, and actually increased the number of bacteria adhering to cells. It was also confirmed that influenza virus infection reduces the expression level of ZO-1 gene, one of the components of tight junctions, and actually causes a decline in epithelial barrier function. In response to these effects, polysaccharides produced by lactic acid bacteria suppressed viral infection, and an associated decrease in CEACAM-1 gene expression and recovery of ZO-1 gene expression were observed.

Academic Significance and Societal Importance of the Research Achievements

インフルエンザウイルス感染に続く、細菌二次感染は宿主病態悪化の危険因子のひとつである。本研究ではインフルエンザウイルス感染よる細菌二次感染易感染性はウイルス感染細胞の細菌接着分子遺伝子発現誘導およびタイトジャンクション遺伝子発現低下による上皮バリア機能脆弱により起こる可能性を示唆した。また予防法として乳酸菌産生多糖体がインフルエンザウイルス感染予防効果を示し、それに伴う易感染性のメカニズムも改善することが認められた。インフルエンザウイルス感染予防に乳酸菌産生多糖体が効果を持つことを論文として情報を発信した。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (19 results)

All 2024 2023 2022 2021 2020

All Journal Article (9 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (10 results)

  • [Journal Article] <i>In vitro</i> investigation of the effects of <i>Lactobacillus delbrueckii</i> ssp. <i>bulgaricus</i> OLL1073R-1 exopolysaccharides on tight junction damage caused by influenza virus infection2024

    • Author(s)
      Ishikawa Hiroki、Kuno Yoshihiro、Yokoo Takehiro、Nagashima Ryuichi、Takaki Takashi、Sasaki Hiraku、Kohda Chikara、Iyoda Masayuki
    • Journal Title

      Letters in Applied Microbiology

      Volume: 77 Issue: 4

    • DOI

      10.1093/lambio/ovae029

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of NKT Cells on Metabolic Disorders Caused by High-Fat Diet Using CD1d-Knockout Mice2023

    • Author(s)
      Ishikawa Hiroki、Nagashima Ryuichi、Kuno Yoshihiro、Sasaki Hiraku、Kohda Chikara、Iyoda Masayuki
    • Journal Title

      Diabetes, Metabolic Syndrome and Obesity

      Volume: Volume 16 Pages: 2855-2864

    • DOI

      10.2147/dmso.s428190

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The essential role of intestinal microbiota in cytomegalovirus reactivation2023

    • Author(s)
      Kohda Chikara、Ino Satoshi、Ishikawa Hiroki、Kuno Yoshihiro、Nagashima Ryuichi、Iyoda Masayuki
    • Journal Title

      Microbiology Spectrum

      Volume: 11 Issue: 5

    • DOI

      10.1128/spectrum.02341-23

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] HIF-PHD inhibitor regulates the function of group2 innate lymphoid cells and polarization of M2 macrophages2023

    • Author(s)
      Nagashima Ryuichi、Ishikawa Hiroki、Kuno Yoshihiro、Kohda Chikara、Iyoda Masayuki
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 1867-1867

    • DOI

      10.1038/s41598-023-29161-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Exopolysaccharides from Lactobacillus delbrueckii ssp. bulgaricus OLL1073R-1 prevent influenza virus infection and attenuate secondary bacterial infection risk2022

    • Author(s)
      Ishikawa H.、Kuno Y.、Kohda C.、Sasaki H.、Nagashima R.、Iyoda M.
    • Journal Title

      Letters in Applied Microbiology

      Volume: 74 Issue: 5 Pages: 632-639

    • DOI

      10.1111/lam.13649

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Genomic and pathogenic characterization of RTX toxin producing Rodentibacter sp. that is closely related to Rodentibacter haemolyticus2022

    • Author(s)
      Sasaki Hiraku、Ueshiba Hidehiro、Yanagisawa Naoko、Itoh Yuta、Ishikawa Hiroki、Shigenaga Ayako、Benga Laurentiu、Ike Fumio
    • Journal Title

      Infection, Genetics and Evolution

      Volume: 102 Pages: 105314-105314

    • DOI

      10.1016/j.meegid.2022.105314

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] IL-33 attenuates renal fibrosis via group2 innate lymphoid cells2022

    • Author(s)
      Nagashima Ryuichi、Ishikawa Hiroki、Kuno Yoshihiro、Kohda Chikara、Iyoda Masayuki
    • Journal Title

      Cytokine

      Volume: 157 Pages: 155963-155963

    • DOI

      10.1016/j.cyto.2022.155963

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Oral administration of trehangelin-A alleviates metabolic disorders caused by a high-fat diet through improvement of lipid metabolism and restored beneficial microbiota2020

    • Author(s)
      Ishikawa Hiroki、Ino Satoshi、Nakashima Takuji、Matsuo Hirotaka、Takahashi Y?ko、Kohda Chikara、?mura Satoshi、Iyoda Masayuki、Tanaka Kazuo
    • Journal Title

      Obesity Research & Clinical Practice

      Volume: 14 Issue: 4 Pages: 360-367

    • DOI

      10.1016/j.orcp.2020.06.004

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Penicillin-Binding Proteins and Associated Protein Mutations Confer Oxacillin/Cefoxitin Tolerance in Borderline Oxacillin-Resistant Staphylococcus aureus2020

    • Author(s)
      Sasaki Hiraku、Ishikawa Hiroki、Itoh Taisuke、Arano Makoto、Hirata Koya、Ueshiba Hidehiro
    • Journal Title

      Microbial Drug Resistance

      Volume: -

    • DOI

      10.1089/mdr.2020.0191

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Group2 innate lymphoid cells ameliorate renal fibrosis and dysfunction associated with adenine-induced CKD2024

    • Author(s)
      Ryuichi Nagashima, Hiroki Ishikawa, Yoshihiro Kuno, Chikara Kohda, Masayuki Iyoda
    • Organizer
      第52回日本免疫学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] インフルエンザウイルス感染によるタイトジャンクション傷害におけるOLL1073R-1乳酸菌産生多糖体の影響2023

    • Author(s)
      石川裕樹、長島隆一、久野芳裕、高木孝士、幸田力、佐々木啓、伊與田雅之
    • Organizer
      第70回日本ウイルス学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 潜伏サイトメガロウイルスの再活性化におけるエストロゲンおよびプロゲステロンの関与2023

    • Author(s)
      幸田力、石川裕樹、久野芳裕、長島隆一、伊與田 雅之
    • Organizer
      第70回日本ウイルス学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 高脂肪食摂取誘導肥満におけるNKT細胞の影響2023

    • Author(s)
      石川裕樹、長島隆一、久野芳裕、佐々木啓、幸田力、伊與田雅之
    • Organizer
      第24回氷川フォーラム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Characterization of Rodentibacter sp. that is closely related to Rodentibacter haemolyticus2023

    • Author(s)
      佐々木 啓、上芝 秀博、柳澤 直子、石川 裕樹、伊與田 雅之、池 郁生
    • Organizer
      第96回日本細菌学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] OLL1073R-1乳酸菌産生多糖体はインフルエンザウイルス感染予防効果を示し、さらに細菌二次感染を軽減する2022

    • Author(s)
      石川裕樹、久野芳裕、幸田力、佐々木啓、長島隆一、狩野宏、石井祥子、伊與田雅之
    • Organizer
      第69回日本ウイルス学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] 溶血性を示すRodentibacter sp.の病原性解析2022

    • Author(s)
      佐々木啓、上芝秀博、柳澤直子、石川裕樹、池郁生
    • Organizer
      日本細菌学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] マウスノロウイルス感染においてNKT細胞は腸管内に特異的なIgA抗体を誘導することでウイルス排除に寄与する2021

    • Author(s)
      石川裕樹、佐々木啓、幸田力、久野芳裕、長島隆一、田中和生、伊與田雅之
    • Organizer
      日本ウイルス学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] サイトメガロウイルス再活性化に及ぼすエストロゲンの影響2021

    • Author(s)
      幸田力、石川裕樹、久野芳裕、長島隆一、田中和生、伊與田雅之
    • Organizer
      日本ウイルス学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 肺パスツレラ近縁種Rodentibacter sp.の病原性評価2020

    • Author(s)
      佐々木啓、上芝秀博、石川裕樹、池郁生
    • Organizer
      日本実験動物学会総会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi