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A new mechanism of intestinal inflammation based on copy number polymorphism

Research Project

Project/Area Number 21K07918
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionKagoshima University

Principal Investigator

Kanmura Shuji  鹿児島大学, 医歯学域鹿児島大学病院, 准教授 (60448561)

Co-Investigator(Kenkyū-buntansha) 熊谷 公太郎  鹿児島大学, 医歯学域鹿児島大学病院, 助教 (80626664)
田中 啓仁  鹿児島大学, 鹿児島大学病院, 医員 (90896127)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
KeywordsDefensin alpha / 好中球ペプチド / 潰瘍性大腸炎 / コピー数多型 / Defensin / ディフェンシン / 炎症性腸疾患 / alpha defensin
Outline of Research at the Start

自己免疫疾患の発症においてDefensin alpha(DEFA)1-3のコピー数多型(CNV)が注目されている。本研究では,DEFA-CNVsと潰瘍性大腸炎の発症や重症化との関連を明らかにし,さらにDEFA1-3がコードする好中球ペプチドの腸管炎症への影響を解明する。本研究の成果は潰瘍性大腸炎の重症化の解明に寄与すると考えられる。

Outline of Final Research Achievements

Copy number variations (CNVs) of defensin alpha (DEFA) 1-3 have been implicated in the pathogenesis of autoimmune diseases, the association between DEFA1A3-CNVs and ulcerative colitis (UC) is unknown. In this study, DEFA1A3 copy number and clinical activity were correlated in patients with UC. In a multivariate analysis, DEFA1A3 high copy number was an independent factor determining clinical severity. On the other hand, in neutrophil-specific DEFA1A3-transgenic (Tg) mice, high copy number Tg mice also showed a significantly higher mortality rate from DSS colitis and a higher clinical activity and histological scores of colitis compared to wild-type mice.

Academic Significance and Societal Importance of the Research Achievements

本研究はこれまで報告のない潰瘍性大腸炎における重症度とDEFA1A3-CNVの関連性に着目した新しいバイオマーカー探索の研究である。DEFA1A3コピー数の測定は,潰瘍性大腸炎患者個々人における,治療反応性や重症化の予測マーカーの開発につながり,極めて臨床的にも意義深い。この研究の発展させることができれば,不要なリスクを冒すことなく適切な治療を選択できるような医療を提供できる社会の実現が期待できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (6 results)

All 2024 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Increased Gene Copy Number of DEFA1A3 Is Associated With the Severity of Ulcerative Colitis2021

    • Author(s)
      Kanmura Shuji、Morinaga Yuko、Tanaka Akihito、Komaki Yuga、Iwaya Hiromichi、Kumagai Kotaro、Mawatari Seiichi、Sasaki Fumisato、Tanoue Shiroh、Hashimoto Shinichi、Sameshima Yoichi、Ono Yohei、Ohi Hidehisa、Ido Akio
    • Journal Title

      Clinical and Translational Gastroenterology

      Volume: 12 Issue: 4 Pages: e00331-e00331

    • DOI

      10.14309/ctg.0000000000000331

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] High copy number polymorphisms of alpha defensin 1-3 are associated with therapeutic responsiveness in inflammatory bowel disease.2024

    • Author(s)
      Kanmura S, Morinaga Y, Maeda N, Tanaka A, Komaki Y, Ido A.
    • Organizer
      CROHN'S & COLITIS CONGRESS
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 炎症性腸疾患患者における脂肪肝の臨床的特徴と意義.2023

    • Author(s)
      坂江 遥,小田耕平,小牧祐雅,上村修司,井戸章雄.
    • Organizer
      第121回日本消化器病学会九州支部例会・第115回日本消化器内視鏡学会九州支部例会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Copy number variation of alpha defensin 1-3 is a predictive marker of therapeutic response in ulcerative colitis2023

    • Author(s)
      Shuji Kanmura
    • Organizer
      18th Congress of European Crohn's amd Colitis Organisation (ECCO2023)
    • Related Report
      2022 Research-status Report
  • [Presentation] αディフェンシン1-3の遺伝子コピー数多型は潰瘍性大腸炎の治療反応性の予測マーカーとなる2022

    • Author(s)
      前田将久,上村修司,桑水流康介,小牧蕗子,田中啓仁,鮫島洋一,小牧祐雅,井戸章雄
    • Organizer
      第13回日本炎症性腸疾患学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Real world における潰瘍性大腸炎に対するベドリズマブの治療成績.2021

    • Author(s)
      田中啓仁, 上村修司, 桑水流康介, 湯通堂和樹, 小野陽平, 小牧祐雅, 大井秀久, 中村勇一, 徳重浩一, 井戸章雄.
    • Organizer
      第117回日本消化器病学会九州支部例会/第111回日本消化器内視鏡学会九州支部例会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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