コレステロールを制限する 生物合成フルースは自発的にタイプIIFNシグナリングを誘発する
Autumn G York1, Kevin J Williams2, Joseph P Argus1
1Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA.
Cell
|December 22, 2015
まとめ
I型インターフェロンのシグナリングは細胞の脂質代謝を変化させ,コレステロールの輸入を促進し,ウイルス抵抗性を高めます. コレステロールの合成を制限すると 予期せぬ形でこの免疫反応が活性化され 代謝と先天的な免疫関係が明らかになります
科学分野:
- 免疫学
- 代謝経路
- 細胞の脂質代謝
背景:
- 細胞脂質は,合成と輸入によって得られ,機能に不可欠である.
- I型インターフェロン (IFN) は重要な抗ウイルスサイトカインです.
- 代謝の再プログラムが 免疫反応においてますます認識されています
研究 の 目的:
- 細胞の脂質代謝にどのようにIFN信号が影響するかを調査する.
- 抗ウイルス免疫における 代謝変化の役割を 特定するためです
- 脂質生物合成と先天的な免疫を 結びつけるメカニズムの発見です
主な方法:
- 脂質合成と輸入を追跡するための同位体トレーサー分析
- マクロファージの代謝経路の遺伝子操作
- マウスのウイルスモデルに挑戦します
- コレステロール生物合成とIFN応答に関するメカニズム研究.
主要な成果:
- タイプIのIFNシグナリングは,コレステロールと脂肪酸の合成を減らし,インポートを増加させます.
- 遺伝的に誘発された代謝シフトは,ウイルスに耐性を与える in vivo.
- コレステロールのバイオシンセシスが低下すると,STING経由でタイプIのIFN反応が自発的に発生します.
- このIFN反応は合成コレステロール濃度の低下に依存し,コレステロール補給によって逆転することができます.
結論:
- タイプIのIFNシグナリングは,抗ウイルス防御のための脂質輸入を好む代謝シフトを指揮する.
- コレステロールのバイオシンセシスの障害は 生まれつきの免疫を直接活性化し 代謝-炎症回路を確立します
- この代謝-炎症回路は コレステロール・ホメオスタシスを 生まれつきの免疫反応と結びつけています
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