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

Does Oral Helicobacter Pylori Cause Gastric Cancer? Retrieval by DNA analysis using magnetic beads.

Research Project

Project/Area Number 21K21081
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0907:Oral science and related fields
Research InstitutionNiigata University

Principal Investigator

NAGATA Ryoko  新潟大学, 医歯学総合病院, 医員 (40911748)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
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)
KeywordsHelicobacter pylori / Nested PCR / MLST / genotype / gastric mucosa / allele sequences / MLST解析 / DNAシークエンス / 分子系統解析 / Immnomagnetic beads
Outline of Research at the Start

胃がんの原因であるHelicobacter pylori(以下ピロリ菌)は胃だけでなく、口腔内からも検出される。本研究では、口腔に存在するピロリ菌が将来の胃のピロリ菌感染のリスクファクターとなるかを検討するために、磁気ビーズ法を用いて口腔内サンプルからピロリ菌を分離し、生死の判別を行う手技を確率する。また、胃と口腔のピロリ菌DNAの遺伝子解析を行い、相同性、同一性を確認することで、胃と口腔のピロリ菌感染メカニズムの一端を解明する。

Outline of Final Research Achievements

The infection mechanism of Helicobacter pylori from the oral cavity to the stomach has not been fully elucidated, and it has not been possible to confirm the survival and death of the bacteria in the oral cavity. In this study, in order to elucidate the relationship between the stomach and oral cavity, DNA will be extracted from oral and gastric samples of patients with current H. pylori infection in the stomach and oral cavity. Then, homology is then analyzed by performing nested PCR and MLST analysis.
As a result, although the gastric and oral H. pylori have different genes, they are likely to be closely related. Using MLST to analyze the genetic relationship between gastric and oral H. pylori is useful for considering the elucidation of the infection route. In this study, since the analysis was based on a limited number of gene combinations, it is necessary to establish a culture method for oral H. pylori to clarify whether the oral cavity is the source of gastric infection.

Academic Significance and Societal Importance of the Research Achievements

ピロリ菌の口腔から胃への感染機序は十分に解明されていない。本研究では、口腔と胃の試料よりDNAを抽出し、Nested PCR、MLST解析を行うことで相同性を解析する。胃と口腔のピロリ菌DNAが高い相同性を有することが確認されれば、経口感染を証明するエビデンスを追加できる点で、高い学術的独自性を有する。
結果、胃と口腔のピロリ菌は異なる遺伝子を持つが、近縁である可能性が高い。また、ピロリ菌は成人の口腔内に正常な微生物叢として存在している可能性がある。MLST解析は、感染経路の解明を考察し、口腔ピロリ菌の除菌の必要性を考察するのに役立つ。

Report

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

    (2 results)

All 2023

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results)

  • [Journal Article] Analysis of Genetic Relatedness between Gastric and Oral Helicobacter pylori in Patients with Early Gastric Cancer Using Multilocus Sequence Typing2023

    • Author(s)
      Nagata Ryoko、Sato Hiroki、Takenaka Shoji、Yokoyama Junji、Terai Shuji、Mimuro Hitomi、Noiri Yuichiro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 24 Issue: 3 Pages: 2211-2211

    • DOI

      10.3390/ijms24032211

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Current status of gastric and oral infection/diseases caused by Helicobacter pylori2023

    • Author(s)
      Noiri Yuichiro、Nagata Ryoko
    • Journal Title

      Oral Science International

      Volume: - Issue: 3 Pages: 182-189

    • DOI

      10.1002/osi2.1172

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access

URL: 

Published: 2021-10-22   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi