インターフェロン独立の lncRNA は,細胞代謝を調節することによってウイルスの複製を促進する
Pin Wang1, Junfang Xu2, Yujia Wang2
1National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai 200433, China.
まとめ
研究者らは,ウイルスが代謝酵素を活性化することで複製を促す長いノンコーディングRNA (lncRNA) を発見した. この発見は,広範囲にわたる抗ウイルス治療の新たな標的となる.
科学分野:
- ウイルス学
- 分子生物学
- 代謝の調節
背景:
- ウイルスは複製のために宿主の代謝を操作します.
- ウイルスの感染中にこれらの代謝変化を媒介する重要な調節分子については,ほとんど知られていません.
- これらの分子を理解することは 抗ウイルス戦略の開発に不可欠です
研究 の 目的:
- ウイルス感染中に代謝ネットワークを調節する新しい宿主分子を特定する.
- 特定の長いノンコーディングRNA (lncRNA) がウイルスの複製に影響を与えるメカニズムを解明する.
- この lncRNA を抗ウイルス療法に 対象にする可能性を調査する.
主な方法:
- マウスとヒトの細胞に複数のウイルスによって lncRNAを誘導する.
- lncRNA-ACOD1 を有する細胞と無する細胞におけるウイルスの複製の評価
- 生物化学的測定を用いた代謝酵素への lncRNA-ACOD1 結合の調査.
- GOT2タンパク質と代謝産物のウイルス複製に対するインパクトの評価 in vivo
主要な成果:
- 新しい lncRNA, lncRNA- ACOD1 が特定され,タイプIインターフェロン (IFN- I) に独立して様々なウイルスによって誘発される.
- lncRNA- ACOD1の欠乏は,IFN- I- IRF3独立経路によるウイルス感染を in vivoで有意に減少させた.
- lncRNA- ACOD1は,代謝酵素GOT2の触媒活性に直接結合し,それを強化する.
- GOT2タンパク質とその代謝産物は,lncRNA- ACOD1が存在しない場合でも,ウイルスの複製を助長し,致死率を高めることができます.
結論:
- ウイルスが誘発するlncRNA- ACOD1は,宿主の代謝酵素の活性を増強することによって,ウイルスの複製を促進する.
- これは lncRNA,代謝,ウイルス伝播を結びつける新しいフィードバックメカニズムを表しています.
- lncRNA- ACOD1とGOT2との相互作用は,広範囲の抗ウイルス治療のための潜在的な治療目標です.
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