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2022 Fiscal Year Final Research Report

Elucidation of the gene expression profile of bifidobacteria in the gut microbiota: development of selective recovery method

Research Project

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Project/Area Number 20H02893
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 38020:Applied microbiology-related
Research InstitutionHokkaido University

Principal Investigator

Fukiya Satoru  北海道大学, 農学研究院, 教授 (10370157)

Co-Investigator(Kenkyū-buntansha) 後藤 恭宏  九州大学, 医学研究院, 助教 (20558358)
Project Period (FY) 2020-04-01 – 2023-03-31
Keywordsビフィズス菌 / 選択的回収 / 腸内細菌叢 / 腸内生存 / トランスクリプトーム
Outline of Final Research Achievements

Molecular mechanisms of how bifidobacteria survive in the intestine are not fully understood especially in the presence of the gut microbiota. To clarify the mechanisms, we tried to establish an experimental system to collect Bifidobacterium longum administered into the conventional mouse intestine selectively to obtain its gene expression profiles in the presence of gut microbiota. Four kinds of B. longum strains expressing different peptide tags on the cell surface were constructed as a fusion with the surface-presenting protein. After verifying the tag expression and surface presentation, we established an optimum collection method in vitro using the Strep-tagII. In addition, the tag-expressing strain was successfully recovered from the artificial gut microbiota using the established collection method.

Free Research Field

応用微生物学

Academic Significance and Societal Importance of the Research Achievements

本研究では,ペプチドタグを細胞表層に発現するビフィズス菌株を構築し,人工腸内細菌叢からビフィズス菌を選択的に回収する方法を確立した.これまで腸内細菌叢存在下でのビフィズス菌の詳細な遺伝子発現プロファイルは得られていないが,本研究の成果はその情報を得るためのブレークスルーとなる.また本研究の今後の進展により,ビフィズス菌の腸内での生存機構を明らかにすることが期待される.これにより,様々な健康効果をもたらすビフィズス菌を腸内でどのように維持し,人々の健康維持に貢献するかという社会的な課題に応える基盤的な情報を得ることができる.したがって,本研究の成果は社会的にも重要な成果であると評価できる.

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Published: 2024-01-30  

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