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2022 Fiscal Year Final Research Report

Pathogenesis of pouchitis after ileal pouch anal anastomosis for ulcerative colitis: Analysis of intestinal microbiota and lipid mediators.

Research Project

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Project/Area Number 20K09074
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionNiigata University

Principal Investigator

Kameyama Hitoshi  新潟大学, 医歯学総合研究科, 客員研究員 (40626420)

Co-Investigator(Kenkyū-buntansha) 奥田 修二郎  新潟大学, 医歯学系, 教授 (00512310)
廣瀬 雄己  新潟大学, 医歯学総合研究科, 客員研究員 (10737365)
島田 能史  新潟大学, 医歯学系, 講師 (20706460)
中野 麻恵  新潟大学, 医歯学総合病院, 特任助教 (20790281)
竹内 志穂  新潟大学, 医歯学総合研究科, 客員研究員 (70422277)
中野 雅人  新潟大学, 医歯学総合病院, 講師 (70744788)
小柳 英人  新潟大学, 医歯学総合病院, 医員 (70831725)
永橋 昌幸  新潟大学, 医歯学総合病院, 研究准教授 (30743918)
田島 陽介  新潟大学, 医歯学系, 助教 (30757505)
Project Period (FY) 2020-04-01 – 2023-03-31
Keywords潰瘍性大腸炎 / 回腸嚢炎 / スフィンゴシン-1-リン酸
Outline of Final Research Achievements

The purpose of this study was to analyze the bacterial population involved in the development of pouchitis after ileal pouch anal anastomosis for ulcerative colitis and to examine the mechanism of pouchitis in terms of lipid mediators. Furthermore, we aimed to establish appropriate therapeutic strategies. In this study, immunohistochemical staining with anti- phospho-sphingosine kinase 1 antibody was positive in 80% of pouchitis cases after ulcerative colitis surgery, suggesting the involvement of sphingosine 1-phosphate (S1P) in the development of inflammation. It was also observed that the degree of inflammation of pouchitis may be more severe in cases with high S1P levels. S1P, a lipid mediator, may be involved in the progression of pouchitis after ulcerative colitis surgery.

Free Research Field

消化器外科

Academic Significance and Societal Importance of the Research Achievements

潰瘍性大腸炎術後の回腸嚢炎の炎症増悪と脂質メディエーターであるS1Pの関連を明らかにした初めての報告である。S1P値の高値症例では回腸嚢炎の炎症の程度が高度になっている可能性があることから、S1Pの測定は、回腸嚢炎の活動性の評価、あるいは潰瘍性大腸炎そのものの炎症評価にも有用である可能性が示唆された。

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Published: 2024-01-30  

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