生まれながらの免疫細胞およびその祖先におけるコロナウイルス感染症の表遺伝子記憶
Jin-Gyu Cheong1, Arjun Ravishankar2, Siddhartha Sharma3
1Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY 10065, USA; Immunology and Microbial Pathogenesis Program, Weill Cornell Medicine, New York, NY 10065, USA.
Cell
|August 19, 2023
まとめ
重度のCOVID-19は,血液生成幹細胞と前身細胞 (HSPC) を再プログラムし,長続きする先天性免疫記憶を作り出すことができます. HSPCおよびその子孫におけるこれらの表遺伝的変化は,生存者の長期的な免疫機能障害を説明する可能性があります.
科学分野:
- 免疫学
- 幹細胞生物学
- 感染症
背景:
- 炎症は持続的な細胞変化を引き起こす可能性があります.
- ヒトの感染が血液形成性幹細胞と祖先細胞 (HSPC) の先天性免疫記憶に与える影響は十分に理解されていません.
研究 の 目的:
- 感染症と炎症がヒトのHSPCに先天的な免疫記憶を確立できるかどうか,そしてどのように調査する.
- 2019年の重症コロナウイルス病 (COVID-19) の後のHSPCの長期的表遺伝子組み換えを調査する.
主な方法:
- COVID-19患者の周辺血液から循環するHSPCの分析.
- HSPCの変異を特定するためのエピジェノミックプロファイリング
- 転写因子 (TF) の活動と炎症性遺伝子調節の調査
- コロナウイルス感染のマウスモデルを利用した.
主要な成果:
- HSPCにおけるエピジェネティック再プログラムと変異した先天性免疫フェノタイプは,重症なCOVID-19の後に数ヶ月から1年間持続しました.
- これらの変化は,特定のTF活動,炎症の調節,および骨髄形成の増加と関連していました.
- HSPCの表遺伝的変異は分化した子孫免疫細胞に伝達された.
- 早期のインタールイキン-6 (IL- 6) 活性が持続的な表型に作用した.
結論:
- HSPCのエピジェネティック再プログラミングは,感染後に耐久性のある先天的な免疫記憶につながります.
- この再プログラミングは,COVID-19のような感染症の後に免疫機能が変化した原因である可能性があります.
- 発見は,数百万のCOVID-19生存者における長期的な免疫的影響を理解し,治療する上で重要である.
キーワード:
コロナウイルスIL-6 についてPASC についてエピジェネティック・メモリーエピゲノム造血幹細胞と祖先細胞モノサイト周辺血液単核細胞のインプット濃縮急性後遺症のSARS-CoV-2感染シングルセル訓練された免疫トランスクリプトームさらに関連する動画
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