マクロファージ由来のVISTAはLRIG1と関わり,大腸炎における腸内皮質修復を阻害する
Mengyuan Li1, Binfeng Chen1, Zhixiong Wang2
1Department of Rheumatology and Clinical Immunology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
Cellular & molecular immunology
|August 29, 2025
まとめ
マクロファージのVドメイン免疫グロブリン領域活性化抑制剤 (VISTA) は,腸内細胞を損傷することによって大腸炎を悪化させる. VISTAを遮断したり,VISTA/LRIG1経路を標的にしたりすると,炎症性腸疾患 (IBD) の治癒が促進されます.
科学分野:
- 免疫学
- 胃腸内科
- 細胞生物学
背景:
- 腸内皮質の障害と修復障害は 大腸炎の発症の鍵です
- Vドメインの免疫グロブリン領域のT細胞活性化抑制剤 (VISTA) は免疫チェックポイントタンパク質です.
- 炎症性腸疾患 (IBD) とデクストラン硫酸ナトリウム (DSS) 誘発性大腸炎のモデルでは,VISTAはマクロファージで上位調節されます.
研究 の 目的:
- 大腸炎の病原性におけるVISTAの役割を調査する.
- IBDにおけるVISTA経路を標的とした治療の可能性を調査する.
主な方法:
- IBD患者およびDSS誘発性大腸炎のマウスモデルでのVISTA発現を研究した.
- Rag1-/-モデルを含むVISTA欠乏 (Vsir-/-) と野生型 (WT) のマウスを使用した.
- マクロファージの枯渇と 移植実験を行いました
- VISTA,LRIG1,PPARαの相互作用を腸の幹細胞とオーガノイドで調べました.
主要な成果:
- VISTA欠乏症または閉塞は,DSS誘発性大腸炎の重症性を改善しました.
- VISTA欠乏したマウスの上皮損傷は減少し,マクロファージの枯渇は疾患の重度の違いを正常化した.
- マクロファージ由来のVISTAは上皮損傷を媒介し,VISTA欠乏は粘膜再生を加速した.
- 腸内幹細胞のLRIG1と相互作用し,PPARαを抑制し,オルガノイドの成長を阻害し,上皮損傷を増加させる.
結論:
- マクロファージ由来のVISTAは,大腸炎中の上皮損傷において病原性の役割を果たします.
- VISTA/LRIG1軸を標的とした治療は,IBDにおける上皮修復を促進するための潜在的な治療戦略です.
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