マクロファージ は 菌類 の 産物 の 吸収 を 制限 し て エピテリウム の 整合 性 を 維持 する
Aleksandra S Chikina1, Francesca Nadalin2, Mathieu Maurin2
1Institut Curie, PSL Research University, CNRS UMR 144, F-75005 Paris, France; Institut Curie, PSL Research University, INSERM U932, F-75005 Paris, France.
Cell
|September 24, 2020
まとめ
バルボンのような突起を持つ大腸のマクロファージは,有毒な真菌の代謝物の吸収を防ぐ. この先天的な免疫メカニズムは 結腸細胞を保護し 腸内微生物群のホメオスタシスに不可欠な 腸内バリアの整合性を維持します
科学分野:
- 免疫学
- 胃腸内科
- 微生物学
背景:
- 大腸は液体を吸収し,真菌を宿し,真菌代謝物の吸収を調節する必要があります.
- 菌類の代謝物は上皮細胞を傷つけ,腸壁を壊す可能性があります.
- この流体調節と保護のメカニズムは現在不明です.
研究 の 目的:
- 生まれながらの免疫系が結腸内の液体吸収を 調節するメカニズムの解明
- 毒性菌類の代謝産物からコロノサイトがどのように保護されているかを特定する.
主な方法:
- マクロファージを調査した.
- 大腸の表皮と相互作用する"気球のような"突起を持つマクロファージの特徴.
- マクロファージとBLPの欠如が,真菌製品に曝露した際の上皮細胞生存とバリアの完全性への影響を評価した.
主要な成果:
- 吸収した液体からサンプルを採取する BLP を含む遠大腸のマクロファージを発見した.
- マクロファージやBLPの欠如は,菌類の産物吸収によるコロノシート死亡とバリア機能障害を引き起こすことが示されています.
- 吸収された液体の品質管理のための新しい先天的な免疫メカニズムを特定しました.
結論:
- BLPを持つマクロファージは,菌類の代謝産物による大腸細胞中毒を予防する上で重要な役割を果たします.
- このメカニズムは,上皮のバリアの整体性と大腸微生物群の恒常性を維持するために不可欠です.
- マクロファージが結腸と微生物の相互作用を 制御する意外な役割を明らかにした.
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