マクロファージ・フーマレート・ヒドラゼは,mtRNA媒介によるインターフェロン生成を抑制する
Alexander Hooftman1, Christian G Peace2, Dylan G Ryan3,4,5
1School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland. ahooftma@tcd.ie.
Nature
|March 8, 2023
まとめ
マクロファージの代謝再配線にはアスパルテート-アルギニノスッキナートシャントが含まれます. FH抑制は炎症反応を増加させ,マクロファージの機能におけるFHの保護的役割を強調する.
科学分野:
- 免疫学
- 代謝経路
- 細胞生物学
背景:
- マクロファージエフェクター機能は代謝の再配線に依存しているが,その背後にあるメカニズムは完全に理解されていない.
- 炎症におけるアスパルテート-アルギニノスッキナートシャントの役割については,さらなる解明が必要である.
研究 の 目的:
- マクロファージの炎症反応を駆動する代謝メカニズムを調査する.
- マクロファージ媒介の炎症とサイトカイン生成の調節におけるフーマレート水素酵素 (FH) の役割を定義する.
主な方法:
- バイアスのないメタボロミクスと安定したイソトープアシストトレイシングで,代謝経路を特定する.
- マクロファージの炎症反応を誘発するリポポリサッカリド (LPS) 刺激.
- 薬理学的抑制とフーマレート水素酵素 (FH) の遺伝的消去
- RNAシーケンシングとプロテオミクスは,グローバル遺伝子とタンパク質発現分析のためのものです.
- ミトコンドリア機能とRNAセンシング経路の分析
主要な成果:
- LPS刺激により,炎症性アスパルテート-アルギニノスッキナートシャントが誘発され,細胞酸フーマレートとタンパク質のスッキナーションが増加する.
- FH抑制は細胞内フーマレートを上昇させ,ミトコンドリアの呼吸を抑制し,炎症信号を強める.
- FHの抑制は,インタールイキン10の減少と腫瘍死滅因子の分泌の増加につながります.
- ミトコンドリアのRNA放出によるFH抑制は,TLR7,RIG- I,MDA5の活性化によってインターフェロン-βの産生を上調する.
- FH抑制は全身性白血病患者の細胞で観察され,病原性の役割を示唆しています.
結論:
- FHは,過剰な炎症反応を制限することによって,マクロファージの保護的な役割を果たします.
- FH抑制は,潜在的に全身性狼を含む炎症病理に寄与する.
- FHまたは関連する代謝経路をターゲットにすることで,炎症性疾患の治療戦略を提供することができます.
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