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The photodynamics therapy aiming at biofilm reduction for Pseudomonas aeruginosa and photosensory material increase

Research Project

Project/Area Number 17K11584
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Emergency medicine
Research InstitutionOsaka City University

Principal Investigator

OZAWA TOSHIYUKI  大阪市立大学, 大学院医学研究科, 准教授 (50570602)

Co-Investigator(Kenkyū-buntansha) 粟津 邦男  大阪大学, 工学研究科, 教授 (30324817)
鶴田 大輔  大阪市立大学, 大学院医学研究科, 教授 (90382043)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsアミノレブリン酸 / 皮膚潰瘍 / バイオフィルム / 緑膿菌 / 光線力学療法 / 青色LED / プロトポルフィリンⅨ / 5-aminolevulinic acid / LED
Outline of Final Research Achievements

Photodynamic therapy (PDT) is thought to have the potential to be a non-antibiotic treatment for infections. 5-Aminolevulinic acid (ALA), which works as a photosensitizer after being metabolized into protoporphyrin IX (PpIX) in the heme synthetic pathway, is used for PDT. Thus far, the in vivo effectiveness of PDT using ALA against Pseudomonas aeruginosa (PA) is unknown.Objective: In this study, we investigated PDT using ALA both in vitro and in vivo. Although PDT with ALA alone did not show a bactericidal effect on PA, PDT with both ALA and EDTA-2Na had a bactericidal effect in vitro and reduce the biofilms. In in vivo experiments, wounds healed faster in PA-infected mice treated with PDT using both EDTA-2Na and ALA compared to non-PDT. These results suggest that PDT with EDTA-2Na and ALA is a potential novel treatment option for PA-infected wounds.

Academic Significance and Societal Importance of the Research Achievements

これまで、MRSAや緑膿菌感染皮膚潰瘍に対する治療法は、蜂窩織炎などを合併する場合は抗生剤投与、その他の場合は消毒殺菌剤を患部に塗布し洗浄処置であった。抗生剤の投与は、新たな耐性菌を生じ、消毒殺菌剤は、創傷治癒を遅延することが知られている。我々は、この2つの問題を同時に解決する一つとして、光線力学療法に注目し研究を行っている。今回の研究を合わせて、光線力学療法が、MRSAおよび緑膿菌、つまり、グラム陽性菌およびグラム陰性菌両方に殺菌効果及び創傷治癒促進効果があることがわかった。つまり、光線力学療法は感染皮膚潰瘍に対する新たな治療方の1つになりえる可能性があることがわかった。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (10 results)

All 2019 2018 2017

All Journal Article (4 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] 症例 Rothmann-Makai症候群の1例2019

    • Author(s)
      綾野 悠加、岩城 佳子、小澤 俊幸、鶴田 大輔
    • Journal Title

      皮膚科の臨床

      Volume: 61 Issue: 10 Pages: 1541-1545

    • DOI

      10.18888/hi.0000001593

    • NAID

      40022025011

    • ISSN
      0018-1404
    • Year and Date
      2019-09-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Adipose-derived Stromal/Stem Cells Improve Epidermal Homeostasis2019

    • Author(s)
      Mariko Moriyama, Shunya Sahara, Kaori Zaiki, Ayumi Ueno, Koichi Nakaoji, Kazuhiko Hamada, Toshiyuki Ozawa, Daisuke Tsuruta, Takao Hayakawa, Hiroyuki Moriyama
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 18371-18371

    • DOI

      10.1038/s41598-019-54797-5

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Relationship between dermoscopy and pathology in a case of clonal‐type pigmented Bowen's disease: Observation with vertical‐view dermoscopy2019

    • Author(s)
      Yamanaka‐Takaichi Mika、Ozawa Toshiyuki、Kusutani Nao、Sowa‐Osako Junko、Tanaka Masaru、Murata Yozo、Kubo Yuki、Ohsawa Masahiko、Tsuruta Daisuke、Sakai Hiroshi
    • Journal Title

      The Journal of Dermatology

      Volume: 46 Issue: 5 Pages: 436-439

    • DOI

      10.1111/1346-8138.14814

    • Related Report
      2019 Annual Research Report
  • [Journal Article] 2.光線過敏を使用した皮膚科治療:PDT2017

    • Author(s)
      小澤 俊幸
    • Journal Title

      The Japanese Journal of Dermatology

      Volume: 127 Issue: 13 Pages: 2791-2797

    • DOI

      10.14924/dermatol.127.2791

    • NAID

      130006259355

    • ISSN
      0021-499X, 1346-8146
    • Related Report
      2017 Research-status Report
  • [Presentation] 大阪市立大学皮膚科における 悪性黒色腫221例の検討2019

    • Author(s)
      白鳥 実友、小澤 俊幸、葛谷 早喜子、蓮池 智子、 櫻井 洋太郎、鶴田 大輔
    • Organizer
      第35回日本皮膚悪性腫瘍学会学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ダーモスコピー所見で基底細胞癌との鑑別を要したeccrine poromaの1例2019

    • Author(s)
      山田 佳奈、今西 久幹、小澤 俊幸、葉山 友紀、 若狭 研一、大迫 順子、鶴田 大輔
    • Organizer
      第70回日本皮膚科学会中部支部学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 光で感染症を治療する2019

    • Author(s)
      小澤 俊幸
    • Organizer
      第31回日本レーザー治療学会学術集会・総会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 大腿に生じたprimary cutaneous mucoepidermoid carcinomaの1例2019

    • Author(s)
      白鳥 実友、小澤 俊幸、岡林 綾、大迫 順子、鶴田 大輔、 大澤 政彦
    • Organizer
      第475回日本皮膚科学会大阪地方会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 光・レーザーが皮膚に与える影響・障害2019

    • Author(s)
      小澤俊幸
    • Organizer
      レーザー学会学術講演会第37回年次大会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Photodynamic therapy against both methicillin-resistant Staphylococcus aureus and Pseudomonas aeruginosa2018

    • Author(s)
      Bumpei Katayama, Toshiyuki Ozawa, Sakiko kuzuya, Nobuhisa Ito, Kunio Awazu, Daisuke Tsuruta
    • Organizer
      International Investigative Dermatology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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