生まれながらのリンパ性細胞は,インターレウキン23依存の生まれながらの腸内病理を駆動する
Sofia Buonocore1, Philip P Ahern, Holm H Uhlig
1Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK.
Nature
|April 16, 2010
まとめ
インタールエウキン-23 (IL-23) は,先天性免疫細胞,特に先天性リンパ性細胞を駆動して炎症性サイトカインを生成します. これらの細胞を枯渇させると大腸炎を止め,炎症性腸疾患の新たな治療標的を明らかにします.
科学分野:
- 免疫学 免疫学とは
- 胃腸内科 胃腸内科
- 細胞生物学 細胞生物学
背景:
- インターリューキン-23 (IL-23) は,主としてTヘルパー17 (TH17) 細胞を通じて,自己免疫性および炎症性疾患に関与しています.
- IL-23は先天的な免疫細胞にも影響を及ぼし,T細胞独立性大腸炎を引き起こすが,下流経路は不明である.
研究 の 目的:
- IL-23誘発性先天性腸炎の細胞および分子メカニズムを調査する.
- T細胞独立性大腸炎に関与する新しい細胞プレーヤーと経路を特定する.
主な方法:
- コロン白血球におけるIL-23刺激に対する反応として,サイトカイン (IL-17,インターフェロン-ガンマ) の生成の分析.
- 特定のマーカー (Thy1, SCA-1, ROR-ガンマ, IL-23R) を発現する先天性リンパ性細胞 (ILC) の特徴.
- 遺伝子欠乏 (Rag-/-Rorc-/-) と細胞欠乏 (Thy1+) のマウスモデルにおける大腸炎の発症の評価.
主要な成果:
- IL-23刺激は,大腸内の先天性リンパ性細胞の特定の集団によってIL-17およびインターフェロン-ガンマの産生を誘発した.
- これらのIL-23-応答性ILCは,ROR-ガンマを発現し,炎症した大腸に蓄積し,大腸炎の発症に不可欠でした.
- ROR-ガンマの遺伝的欠乏またはThy1+ ILCsの枯渇は,急性および慢性先天性大腸炎の両方を廃止しました.
結論:
- 固有のIL-23受容性先天性リンパ性細胞集団が腸炎を媒介する.
- これらの発見は,炎症性腸疾患 (IBD) の治療介入のための新しい細胞標的を特定しています.
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