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アリル炭化水素受容体の病気耐性防御経路の制御
Alban Bessede1, Marco Gargaro2, Maria T Pallotta3
11] Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy [2] IMS Laboratory, University of Bordeaux, 33607 Pessac, France [3].
Nature
|June 17, 2014
まとめ
リポポリサッカリド (LPS) によってアリル炭水化物受容体 (AhR) を活性化すると,最初は炎症が軽減されます. この経路は,再挑戦時にインドロアミン2,3-二酸化酵素1 (IDO1) を関与させ,内毒素耐性を促進し,感染から保護します.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- ホストと病原体の相互作用
背景:
- 病原性耐性は,感染中に宿主の健康状態に極めて重要です.
- リポポリサッカリド (LPS) に対する反射性の状態であるエンドトキシン耐性 (endotoxin tolerance) は,疾患耐性の重要な側面である.
- 疾患耐性メカニズムの理解は,炎症性疾患に対する新しい治療戦略を明らかにすることができます.
研究 の 目的:
- エンドトキシン耐性におけるアリル炭化水素受容体 (AhR) の役割を調査する.
- 炎症と宿主防御のAhR媒介調節の基礎となる分子機構を解明する.
主な方法:
- ネズミはLPSにさらされ,耐性を誘発した.
- AhRとトリプトファン2,3-ジオキシゲナーゼ,インドロアミン2,3-ジオキシゲナーゼ1 (IDO1) などの関連酵素の活性化を分析した.
- 炎症性遺伝子発現と細菌感染症に対する保護に対するAhRシグナル伝達の影響を評価した.
主要な成果:
- 初回のLPS暴露はAhRと肝臓のトリプトファン2,3-二酸化酸化酵素を活性化させ,早期の炎症性遺伝子を低下させました.
- LPSリチャレンジでは,AhR媒介による全身性炎症の長期的な調節には,インドレアミン2,3-二酸化原酶1 (IDO1) が必要でした.
- AhR複合体の関連Srcキナーゼ活性により,IDO1のリン酸化とシグナル伝達が強化され,エンドトキシン耐性状態に寄与した.
結論:
- AhRは,エンドトキシン耐性を確立する上で重要な役割を果たします.
- AhR-IDO1軸は,全身の炎症の持続的な調節と感染からの保護に不可欠です.
- AhR媒介の疾患耐性メカニズムは,細菌感染中にホストの健康状態に貢献します.
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