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Analysis of intestinal mucosa-associated microbiota involved in progression to non-alcoholic steatohepatitis

Research Project

Project/Area Number 19K07938
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52010:General internal medicine-related
Research InstitutionKobe University

Principal Investigator

Sakai Arata  神戸大学, 医学部附属病院, 特定助教 (50792636)

Co-Investigator(Kenkyū-buntansha) 井上 潤  神戸大学, 医学部附属病院, 助教 (50631561)
矢野 嘉彦  神戸大学, 医学研究科, 講師 (60419489)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords非アルコール性脂肪肝 / 腸内細菌 / 非アルコール性脂肪肝炎 / NASH / 腸管粘膜表層細菌 / 次世代シーケンサー解析
Outline of Research at the Start

アルコール摂取が無いにもかかわらず脂肪肝から脂肪性肝炎(NASH)を発症し肝硬変に至る患者が増えつつあり、非アルコール性脂肪性肝疾患(NAFLD)と呼ばれる。さらにBMI正常であるにもかかわらず、膵切除後や消化管術後など腸内細菌変化が起こる患者でNASHを発症する患者が存在する。糞便中の腸内細菌構成の違いも指摘されているが、脂肪肝からNASH、肝硬変に至るリスク因子については十分わかっていない。本研究の目的は、NASHに特徴的なの腸管粘膜上皮表面の細菌叢やNASHの進行に関わる腸管粘膜上皮表面の細菌叢を、臨床検体を用いて次世代シーケンサーで解析する。

Outline of Final Research Achievements

Non-alcoholic fatty liver disease/hepatitis (NAFLD/NASH) is a liver injury with a non-alcoholic fatty liver background. It is known that the gastrointestinal flora is involved in the pathogenesis, but the pathogenesis is unknown. The purpose of this study is to analyze not only the feces of patients but also the bacterial flora on the surface of the intestinal mucosal epithelium, and to clarify the relationship between disease characteristics and disease activity. In this study, bacterial DNA was extracted from NAFLD and healthy subjects' stool, mucus on the surface of the gastrointestinal mucosa, and saliva, and analyzed using a next-generation sequencer. In NAFLD patients, we clarified not only the changes in the fecal flora, as previously reported, but also the characteristics of the mucosal surface bacteria on the enterobacterial side. We believe that the findings obtained in this study can provide basic information for elucidating the pathology of NASH and NAFLD.

Academic Significance and Societal Importance of the Research Achievements

近年、非アルコール性脂肪性肝/肝炎(NAFLD/NASH)を背景とした肝硬変や肝癌は増加傾向となっており、社会的な問題となっている。NAFLD/NASHの病態には腸内細菌が関わっていることがこれまで示唆されているが、糞便中の腸内細菌叢を解析した研究に限られており、その全貌は明らかでない。本研究では、消化管粘膜表層の細菌叢の解析を行い、これまでに明らかにされていなかったNAFLD患者での消化管の表層細菌の変化を解析し、NASH・NAFLDの病態解明の基礎的知見が得られた。NASH・NAFLDの病態解明への進展が期待できる成果であると考える。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (3 results)

All 2022 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results)

  • [Journal Article] Constitution of mucosa‐associated microbiota in the lower digestive tract does not change in early stage of non‐alcoholic fatty liver disease with fecal dysbiosis2022

    • Author(s)
      Asaji Naoki、Inoue Jun、Hayashi Hiroki、Tokunaga Eri、Shimamoto Yusaku、Kinoshita Masato、Tanaka Takeshi、Sakai Arata、Yano Yoshihiko、Ueda Yoshihide、Kodama Yuzo
    • Journal Title

      JGH Open

      Volume: 6 Issue: 10 Pages: 677-684

    • DOI

      10.1002/jgh3.12803

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Delayed immune-related sclerosing cholangitis after discontinuation of pembrolizumab: A case report2022

    • Author(s)
      Tanaka Takeshi、Sakai Arata、Tsujimae Masahiro、Yamada Yasutaka、Kobayashi Takashi、Masuda Atsuhiro、Kodama Yuzo
    • Journal Title

      World Journal of Gastroenterology

      Volume: 28 Issue: 28 Pages: 3732-3738

    • DOI

      10.3748/wjg.v28.i28.3732

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endoscopic Self-Expandable Metal Stent Placement for Malignant Afferent Loop Obstruction After Pancreaticoduodenectomy: A Case Series and Review2020

    • Author(s)
      Arata Sakai, Hideyuki Shiomi, Takao Iemoto, Ryota Nakano, Takuya Ikegawa, Takashi Kobayashi, Atsuhiro Masuda and Yuzo Kodama
    • Journal Title

      Clinical Endoscopy

      Volume: 未定 Issue: 4 Pages: 491-496

    • DOI

      10.5946/ce.2019.145

    • NAID

      120007115803

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

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