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2019 Fiscal Year Final Research Report

Development of new oral health index based on oral nitrate reduction activity

Research Project

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Project/Area Number 16K11876
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Social dentistry
Research InstitutionOsaka Dental University

Principal Investigator

MASHIMO CHIHO  大阪歯科大学, 歯学部, 講師 (80368159)

Co-Investigator(Kenkyū-buntansha) 馬場 俊輔  大阪歯科大学, 歯学部, 教授 (40275227)
南部 隆之  大阪歯科大学, 歯学部, 講師 (80367903)
Project Period (FY) 2016-04-01 – 2020-03-31
Keywords口腔細菌叢 / 硝酸還元 / 口腔健康 / メタゲノム解析 / ゲノム解析
Outline of Final Research Achievements

A result of oral metagenomic analysis have revealed that some bacterial species (especially Rothia and Actinomyces) related to healthy oral conditions. We understand one of the factors that some Rothia species act as "good bacteria" in the oral cavity is their high nitrate reduction activity. We determined the whole genome sequences of oral Rothia species, and clarified genes involved in the nitrate reduction. In addition, in order to create a new indicator of oral health level, we established a new experimental system for simultaneous monitoring the changes oral environmental condition and oral microbiota.

Free Research Field

口腔細菌学

Academic Significance and Societal Importance of the Research Achievements

本研究により、口腔健康に貢献するRothia属細菌の働きの一端が遺伝子レベルで明らかになった。Rothia属細菌を口腔善玉菌のひとつのモデルと考えて、その働きを遺伝子改変・他菌種との相互関連性など多方面からアプローチしていくことができる基盤が整ったと言える。また、口腔に物質を添加した後の環境変化と個々の細菌の変化を捉えるモデル実験系を確立できた。この方法を利用すれば、どのような条件が整えば、口腔善玉菌(悪玉菌)が増えるのか(減るのか)をin vitroの実験において推測できると考える。

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Published: 2021-02-19  

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