コメンサル細菌によって生成されるメタボライトは,外周的調節性T細胞の生成を促進します
Nicholas Arpaia1, Clarissa Campbell1, Xiying Fan1
11] Howard Hughes Medical Institute and Ludwig Center at Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA [2] Immunology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.
Nature
|November 15, 2013
まとめ
ブチラートのような微生物の短鎖脂肪酸は,腸内の抗炎症調節性T細胞 (Treg) の発育を促進します. これは,腸内細菌の代謝物が免疫システムのバランスと腸内ホメオスタシスにどのように影響するかを強調しています.
科学分野:
- 免疫学 免疫学とは
- 微生物学 微生物学とは
- 胃腸内科 胃腸内科
背景:
- 腸内微生物群の構成は,免疫ホメオスタシスを影響する.
- 調節性T細胞 (Treg) は,腸の炎症を抑制する上で極めて重要です.
- 微生物がTreg細胞の分化に影響する分子機構は,完全に理解されていません.
研究 の 目的:
- Treg細胞生成における微生物代謝産物の役割を調査する.
- 短鎖脂肪酸 (SCFA) が腸内のプロおよび抗炎症性免疫応答のバランスにどのように影響するか調べる.
主な方法:
- 微生物代謝産物,特にブチラートやプロピオネートなどのSCFAが,マウスのTreg細胞生成に及ぼす影響を研究した.
- ブチラート誘発のTreg細胞の拡張が,中枢神経系内定増強剤 (CNS1) に依存しているかを評価した.これは,外型Tregの分化に不可欠である.
主要な成果:
- 微生物のSCFAであるブチラートは,マウスのTreg細胞のエクストラティム生成を著しく促進した.
- このTreg細胞数の増強は,CNS1増強剤に依存しており,外周Treg発達の決定的な役割を果たしています.
- 別のHDACを阻害するSCFAであるプロピオネートも,アセテートとは異なり,Treg細胞の生成をデノボ強化しました.
結論:
- バクテリアの代謝産物,特にブチラートやプロピオネートなどのSCFAは,腸内微生物群と宿主の免疫システムとのコミュニケーションにおいて重要な媒介者の役割を果たします.
- これらの微生物代謝物は,Treg細胞の分化に影響することによって,プロおよび抗炎症メカニズム間のバランスを調節することができます.
- これらの微生物と免疫の相互作用を理解することは,腸の免疫ホメオスタシスを維持し,潜在的に炎症性疾患の治療に不可欠です.
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