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Updated: Sep 12, 2025

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Measuring Local Anaphylaxis in Mice
Published on: October 14, 2014
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腸のマスト細胞に由来する白血球は,摂取した抗原に対するアナフィラキシー反応を媒介する
Nathaniel D Bachtel1, Jaime L Cullen1, Min Liu1
1Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA.
まとめ
マウスの経口アナフィラキシーには,免疫グロブリンE-Fcε受容体1 (IgE-FcεR1) のシグナル伝達が必要であり,特異的な腸のマスト細胞が関与する. これらの食物アレルギー反応の鍵となるのは ヒスタミンではなく レウコトリエンの合成です
科学分野:
- 免疫学
- 胃腸内科
- アレルギー研究
背景:
- アナフィラキシスは,食物アレルゲンに対する重度のアレルギー反応です.
- アナフィラキシスの既存のマウスモデルは,しばしば静脈内注射を使用し,経口摂取を反映していません.
- 食物アレルギーの理解には 粘膜のアレルゲンへの曝露が不可欠です
研究 の 目的:
- 口腔アナフィラキシーにおける腸のマスト細胞の役割を調査する.
- 摂取による食物アレルゲン誘発のアナフィラキシーの特定のメカニズムを理解する.
- 腸のマスト細胞機能を他のマスト細胞集団と比較する.
主な方法:
- 経口アレルゲン被曝後のマウス腸のマスト細胞を調査した.
- 免疫グロブリンE-Fcε受容体1 (IgE-FcεR1) 信号伝達経路を分析した.
- 腸のトランスクリプトームと効果細胞の比較
- 遺伝的欠乏症と白血糖合成の薬学的な阻害 (ジレウトン,aLOX5抗体) を利用した.
主要な成果:
- 経口アナフィラキシーでは,腸のマスト細胞でIgE-FcεR1の信号伝達が必要になります.
- 腸のマスト細胞は異質で,上皮細胞の影響を受け,結合組織のマスト細胞とは異なる.
- 腸のマスト細胞はヒスタミンの分泌量が減っているが,白血球の合成が強化されている.
- 経口のアナフィラキシーには抵抗があるが,静脈内のアナフィラキシーには抵抗がない.
結論:
- 腸内マスト細胞は 口腔アナフィラキシーに 重要な役割を果たします
- レウコトリエンの合成は,腸内マスト細胞による食物アレルギー反応の重要な媒介である.
- レウコトリエンの経路をターゲットにすることで,口服による食物アレルギーの治療策を提供することができる.
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