NOTCHシグナリングは,腎臓アロ移植の拒絶におけるマクロファージの炎症性-繊維性連続体をオーケストラする
Yanxu Chen1, Qiang Zhang1, Wenyu Xie1
1Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, Guangdong 510080, China.
Experimental cell research
|September 5, 2025
まとめ
研究者らは,新種のTGFB+CD86+マクロファージのサブセットが腎臓移植の拒絶を誘発していることを特定しました. このサブセットはJagged1-NOTCH2シグナリングによって調節され,炎症と線維症を橋渡しし,慢性的な拒絶に対する潜在的な治療目標を提供します.
科学分野:
- 免疫学
- 移植生物学
- 単細胞ゲノム
背景:
- 慢性的な拒絶は腎臓移植の失敗の主な原因です
- マクロファージは 慢性的な拒絶に 重要な役割を果たしますが その役割は複雑です
- マクロファージの異質性を理解することは,新しい治療法の開発に不可欠です.
研究 の 目的:
- 慢性的な腎臓アロ移植拒絶に関与するマクロファージのサブセットを特定し,特徴づけること.
- これらのマクロファージ集団を支配する規制機構と細胞間通信ネットワークを解明する.
- 慢性的な拒絶を緩和するための潜在的な治療目標を探求する.
主な方法:
- ヒト腎臓アロインプラントバイオプシの単細胞トランスクリプトミア分析とラットの慢性拒絶モデル.
- 細胞の分化と通信を推論するために,偽薬の経路とリガンド受容体相互作用の分析.
- 特定されたマクロファージのサブセットとシグナル伝達経路の機能を検証するインビトロ検査.
主要な成果:
- 炎症性および線維性特性を有する特異なTGFB+CD86+マクロファージのサブセットが特定されました.
- このサブセットは,混合拒絶によって強化され,管状上皮細胞からのジャグド1-NOTCH2信号とT細胞からの炎症信号を受信する.
- 保存されたJagged1-NOTCH2シグナリング軸は,ヒトとネズミの両方のモデルでこの移行マクロファージ集団を調節します.
結論:
- Jagged1-NOTCH2シグナル伝達によって調節される過渡的なTGFB+CD86+マクロファージ群は,慢性的な拒絶における免疫活性化と線維性再構成を結びつける.
- Jagged1-NOTCH2経路をターゲットにすることで,マクロファージの分化を調節し,腎臓アロインプラントの失敗を防ぐ新しい治療戦略を提供することができる.
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