腸内共生原生は,肺免疫を形作ることで,呼吸器疾患の結果を決定する
Kyle Burrows1, Louis Ngai1, Pailin Chiaranunt1
1Department of Immunology, University of Toronto, Toronto, ON, Canada.
Cell
|December 20, 2024
まとめ
腸内原生体であるトリチコモナス・マスクリスは 肺の免疫に影響します 呼吸道におけるエオシノフィルの反応を調整し アレルギー性炎症や結核に影響を与え 新しい腸肺免疫軸を明らかにします
科学分野:
- 免疫学
- 微生物学
- 宿主 と 微生物 の 相互作用
背景:
- 宿主の病気に影響を与える腸内微生物のメカニズムは不明である.
- 腸内共生は 遠方の臓器の免疫に 影響を及ぼします
- ホストの免疫における原生体の役割については,さらなる調査が必要である.
研究 の 目的:
- 腸内原生菌トリトリコモナス・マスキュリス (T.mu) が肺の免疫環境をどのように形作っているかを明らかにする.
- アレルギー性呼吸道炎症と肺感染症における T.mu の役割を理解する.
- T.mu媒介の肺反応に関与する免疫ネットワークを特定する.
主な方法:
- ホストの免疫反応に対する T.mu 植民地の影響を調査した.
- エオシノフィル,先天性リンパ球,T細胞,B細胞を含む肺免疫細胞群を分析した.
- アレルギー性呼吸道炎症と Mycobacterium tuberculosis 感染症に対する宿主の反応を調べた.
- ヒトの唾液のサンプルに 原生生物のDNAを検出した
主要な成果:
- T.muは肺の免疫環境を遠隔的に形成し,呼吸道におけるエオシノフィルの蓄積を促進します.
- 腸由来2群の先天性リンパ球細胞と肺に定着した免疫細胞を含む三重免疫ネットワークが,この効果を媒介する.
- このネットワークはアレルギー性呼吸道炎症を悪化させますが,Mycobacterium tuberculosisの拡散を制限しています.
- 重度のアレルギー性喘息の患者の唾液に原生動物のDNAが見つかりました.
結論:
- T.muのような 複生性原生動物は 腸で作動する肺免疫ネットワークを通して 肺免疫をリモートで調整できます
- この原生菌が誘発するネットワークは,宿主疾患の有益な結果と有害な結果の両方に影響を及ぼします.
- 発見は,アレルギー性喘息を含むヒトの呼吸器疾患における初期原生体の重要性を強調しています.
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