シンビオティックな微生物からのスフィンゴリピドは,宿主腸の自然殺傷性T細胞の恒常性を調節する
Dingding An1, Sungwhan F Oh1, Torsten Olszak2
1Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA.
Cell
|January 21, 2014
まとめ
腸内微生物である Bacteroides fragilis は,不変性天然キラーT (iNKT) 細胞の増殖を制限するためにユニークなスフィンゴリピドを使用し,大腸炎から保護します. この早期の免疫調節は,自己免疫性およびアレルギー性疾患の治療の可能性を提供します.
科学分野:
- 微生物学 微生物学とは
- 免疫学 免疫学とは
- 胃腸内科 胃腸内科
背景:
- 哺乳類の生理学は,腸内微生物との共進化によって形成されています.
- インヴァリアント・ナチュラルキラーT (iNKT) 細胞は,免疫ホメオスタシスにおいて重要な役割を果たします.
研究 の 目的:
- Bacteroides fragilisがiNKT細胞ホメオスタシスにどのように影響するかを調査する.
- iNKT細胞の反応を調節するバクテリアのスフィンゴリピドの治療の可能性を決定する.
主な方法:
- バクテリアのスフィンゴリピドが欠けている新生児マウスを研究した.
- GSL-Bf717を含むB. fragilisのグリコスフィンゴリピドをマウスに投与した.
- 評価されたiNKT細胞数とオクサゾロン誘発性大腸炎に対する保護.
主要な成果:
- Bacteroides fragilisは,宿主脂質を阻害性スフィンゴリピドで補充し,iNKT細胞の増殖を阻害する.
- 新生児の細菌のスフィンゴリピドへの曝露は,成人期までiNKT細胞数を制限する.
- GSL-Bf717による治療は,iNKT細胞数を減少させ,大腸炎から保護しました.
結論:
- GSL-Bf717のような細菌のスフィンゴリピドは,iNKT細胞の発達と機能を阻害する.
- これらの分子は,iNKT細胞媒介の自己免疫性およびアレルギー性疾患に対する潜在的な治療戦略を提供します.
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