β-コロナウイルスは,生物合成分泌経路の代わりにリソソームを利用する

Sourish Ghosh¹, Teegan A Dellibovi-Ragheb¹, Adeline Kerviel¹

¹Laboratory of Host-Pathogen Dynamics, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA.

Cell

|November 6, 2020

まとめ

SARS-CoV-2 を含むベータコロナウイルスは,他のウイルスとは異なり,ウイルスの放出のためにライソソームを使用します. 細胞の機能を妨害し新しい治療目標を示唆しています

科学分野:

ウイルス学
細胞生物学
免疫学

背景:

SARS-CoV-2などのベータコロナウイルスは,既知の侵入および複製メカニズムを持つ包膜RNAウイルスです.
ベータコロナウイルスの出血の正確なメカニズムは,まだ完全に理解されていません.

研究の目的:

ベータコロナウイルスがウイルスのエグリースを利用する細胞経路を解明する.
この脱出メカニズムの重要な分子調節物質と結果を特定する.

主な方法:

先進的なイメージング技術とウイルス特有のレポーターシステムが採用されました.
特定のGTPases (Arl8b,Rab7) と阻害剤 (CID1067700) の役割の分析が関与しました.

主要な成果:

ベータコロナウイルスは,典型的な分泌経路から逸脱して,リソソーム輸送を利用することが示された.
このプロセスはArfのような小さなGTPase Arl8bによって調節され,Rab7をターゲットにすることで抑制することができます.
ライソソーム経由でのウイルスの出血は,ライソソームの脱酸化,分解の障害,抗原プレゼンテーションの障害を引き起こす.

結論:

ベータコロナウイルスの放出は,リゾソーム経路の非従来の利用を表しています.
このメカニズムは,観察された患者の病理に関する洞察を提供し,リゾソーム機能を標的とした新しい治療戦略を提案します.

キーワード:

CD1067700 についてラブ7 SARS-CoV-2について酸化/脱酸化 ARL8b 抗原の表示コロナウイルスリソソーム pH値についてウイルスのエグレスウイルス免疫学

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