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2022 Fiscal Year Final Research Report

Analysis of the Mechanisms of Enterocolitis Development and Intestinal Fibrosis Mediated by Endoplasmic Reticulum Stress in Mast Cells

Research Project

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Project/Area Number 19K08450
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionOsaka Metropolitan University (2022)
Osaka City University (2019-2021)

Principal Investigator

Hosomi Shuhei  大阪公立大学, 大学院医学研究科, 講師 (60554938)

Project Period (FY) 2019-04-01 – 2023-03-31
Keywords小胞体ストレス / 肥満細胞 / Amphiregulin / interleukin-12 / interleukin-23
Outline of Final Research Achievements

We found that the gene for Amphiregulin (AREG) and the Amphiregulin protein were induced in LUVA cells, a mast cell line, via the endoplasmic reticulum stress responsive transcription factor ATF4 under endoplasmic reticulum stress stimulation. In addition, in vitro experiments using LUVA cells stimulated with recombinant IL-12/23 revealed that comprehensive gene expression analysis of LUVA cells under co-stimulation with IL-12 and IL-23 revealed the expression of ATP synthesis coupled electron transport、ATP synthesis coupled electron transport. This result suggested that IL-12/23 inhibition might contribute to the mechanism of mast cell activation and fibrotic stenosis via IgE-independent pathway.

Free Research Field

炎症性腸疾患

Academic Significance and Societal Importance of the Research Achievements

炎症性腸疾患の一つであるクローン病は、慢性・再発性の腸管炎症と、炎症による狭窄・穿孔が患者の生活の質や予後の影響する表現型として知られる疾患である。本研究の結果で、線維性狭窄形成に寄与することが知られる肥満細胞への小胞体ストレスの影響や、線維性狭窄予防に期待される、IL-12やIL-23パスウェイ阻害治療のその分子生物学的機序に関わりううる基礎的結果を得ることができた。今後の新規治療や、線維性狭窄の予測因子同定などにつながりうる結果である。

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Published: 2024-01-30  

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