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

Development of novel designer bacteria for cancer therapy based on organic acid-secreting bacteria

Research Project

Project/Area Number 21K20819
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0901:Oncology and related fields
Research InstitutionNagasaki University (2023)
Institute of Physical and Chemical Research (2021-2022)

Principal Investigator

Nomura Shoko  長崎大学, 医歯薬学総合研究科(薬学系), 助教 (40911178)

Project Period (FY) 2021-08-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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生菌製剤 / デザイナー細菌 / がん治療 / Blautia coccoides / グラム陽性菌 / 細菌
Outline of Research at the Start

本研究では、乳酸菌や酪酸菌といった有機酸分泌細菌をターゲットに、がん治療用に有用な細菌種候補を開拓し、それらを基盤としたがん治療用デザイナー細菌の開発を目的とする。
具体的には、①腫瘍内増殖能を有する有機酸分泌細菌をスクリーニングにより選別し、②それらの生体内投与時の特性(体内動態や免疫賦活作用、抗腫瘍効果など)を評価する。さらに③候補細菌に遺伝子改変を施し、新規のがん治療用デザイナー細菌の開発を図る。

Outline of Final Research Achievements

The purpose of this study was to investigate organic acid-secreting bacteria useful for cancer therapy from among the predominant bacteria of the mammalian intestinal microbiota and to develop new designer bacteria by introducing a foreign gene expression system to these bacteria. Intravenously administered Blautia coccoides secreting acetic acid and lactic acid as metabolites, and Bacteroides vulgatus, which are the most dominant bacteria in the human intestinal microbiota, showed growth and proliferation in tumors. Particularly, B. coccides showed one-million-fold growth in two weeks in tumors, but did not survive in major organs and showed low host immunogenicity. This indicates that B. coccides is a promising candidate for live bacterial therapeutics for cancer treatment showing both tumor-selective growth and low immunostimulatory activity.

Academic Significance and Societal Importance of the Research Achievements

本研究は、生菌製剤を用いたがん治療において、有用な細菌種を開拓し、新規のデザイナー細菌を開発することを目的としている。生菌製剤として前例のない、ヒト腸内細菌叢最優勢の有機酸分泌細菌が、腫瘍内増殖・投与時の安全性を両立する新たな候補細菌種であることを明らかにできた。本研究の成果は、がん治療用生菌製剤の開発において、治療効果と生体適合性の両方を高めたデザイナー細菌の候補細菌種の裾野の拡張に繋がると期待できる。

Report

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

    (2 results)

All 2023 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (1 results)

  • [Journal Article] Blautia coccoides JCM1395T Achieved Intratumoral Growth with Minimal Inflammation: Evidence for Live Bacterial Therapeutic Potential by an Optimized Sample Preparation and Colony PCR Method2023

    • Author(s)
      Nomura Shoko、Sukowati Erike W.、Shigeno Yuko、Takahashi Maiko、Kato Akari、Benno Yoshimi、Yamashita Fumiyoshi、Mukai Hidefumi
    • Journal Title

      Pharmaceutics

      Volume: 15 Issue: 3 Pages: 989-989

    • DOI

      10.3390/pharmaceutics15030989

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Blautia coccoides JCM1395Tの生体内分布と生菌製剤としての有用性評価のためのコロニーPCR法の最適化2022

    • Author(s)
      野村 祥子、Erike Sukowati、高橋 麻衣子、重野 佑布子、辨野 義己、山下 富義、向井 英史
    • Organizer
      第三回 超分子薬剤学FGシンポジウム
    • Related Report
      2022 Research-status Report

URL: 

Published: 2021-10-22   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi