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2021 Fiscal Year Final Research Report

Remodeling of glycoconjugates in fish cells induced by the E. tarda infection

Research Project

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Project/Area Number 19K06223
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40040:Aquatic life science-related
Research InstitutionKagoshima University

Principal Investigator

Kazuhiro Shiozaki  鹿児島大学, 農水産獣医学域水産学系, 准教授 (70390896)

Project Period (FY) 2019-04-01 – 2022-03-31
KeywordsEdwardsiela piscicida / 糖鎖 / 魚病 / シアル酸 / シアリダーゼ / シアル酸リアーゼ / CMPシアル酸合成酵素
Outline of Final Research Achievements

E. tarda is a fish disease bacterium that infects cultured fish, but the mechanism of infection remains unclear. In this project, we focused on the sugar chains on fish cells and bacteria, and analyzed the changes in sugar chain structure during bacterial infection. The results revealed that 1) E. tarda uses sugar chains on the host cell surface as ligands during infection, 2) excision of sialic acid is necessary for this process, and 3) free sialic acid is taken up by the bacteria and used for sialylation.

Free Research Field

水圏応用生物化学

Academic Significance and Societal Importance of the Research Achievements

E. tardaは細胞内寄生細菌であり、生ワクチンが使用できない養殖現場において、その予防・治療法の開発が急務である。本課題では、E. tardaの感染制御にはバクテリアおよび宿主細胞におけるある特定の糖鎖構造が重要であることを明らかにした。この研究成果は、E.tarda感染の予防・治療において、糖鎖が標的分子となることを示しており、今後は糖鎖合成、および分解酵素の阻害剤などに応用の可能性が期待される。

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Published: 2023-01-30  

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