DNA 損傷シグナリングは,粒子のポリプロイドマクロファージの運命を指示する
Laura Herrtwich1, Indrajit Nanda2, Konstantinos Evangelou3
1Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; Center of Chronic Immunodeficiency, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany.
Cell
|January 14, 2017
まとめ
持続的なトール型受容体2のシグナル伝達により,マクロファージは融合ではなく,DNA損傷反応によってポリプロイドになる. このプロセスは,慢性的な炎症の間,粒腫組織の再構築を形作ります.
科学分野:
- 免疫学
- 細胞生物学
- ゲノミクス
背景:
- 粒子は慢性炎症に反応する 免疫集合体です
- 粒腫内のマクロファージのサブセットは,多様なゲノム内容を示しています.
- 慢性炎症におけるマクロファージの分化の原因は不明である.
研究 の 目的:
- 慢性炎症刺激に対するマクロファージの分化制御の分子経路を定義する.
- マクロファージの運命におけるトール型受容体2 (TLR2) 信号伝達の役割を調査する.
- 粒腫におけるポリプロイドマクロファージ形成のメカニズムを解明する.
主な方法:
- 持続的なTLR2信号によって誘発されたマクロファージの分化経路の分析.
- 複製ストレスとDNA損傷反応の活性化に関する研究
- マクロファージにおける細胞分裂機構とゲノム不安定性の評価
- TLR2信号によるMycとATRの制御の評価
主要な成果:
- 持続的なTLR2シグナリングは,複製ストレスとDNA損傷応答を通じて,マクロファージのポリプロイディを誘発する.
- ポリプロイド粒子のマクロファージは,細胞融合ではなく,細胞分裂によって発生する.
- TLR2シグナリングはMycとATRを調節することでゲノム不安定性を抑制する.
- 新しいマクロファージ分化経路が描かれています.
結論:
- 持続的なTLR2シグナリングは,小胞腫形成の重要なイベントであるマクロファージのポリプロイディを促進する.
- この経路は,複製ストレスとDNA損傷反応を伴うため,長寿のポリプロイドマクロファージを生成します.
- これらの発見は,通常がん発生と関連している経路を,生理学的免疫反応と組織再構成と結びつけています.
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