レジオネラエフェクタは,原生類から非リチンの放出を促進する

John Chen¹, Karim Suwwan de Felipe, Margaret Clarke

¹Department of Microbiology, College of Physicians and Surgeons, Columbia University, 701 West 168th Street, New York, NY 10032, USA.

Science (New York, N.Y.)

|February 28, 2004

まとめ

レジオネラ・プネオフィラはICM/ドット分泌システムを用いて,特殊な真空球を形成する. レプタンパク質は,細菌の拡散のための原生類の外細胞経路をハイジャックし,レギオネアに助けることができます.

科学分野:

微生物学微生物学とは
細胞生物学細胞生物学
パトジェネシス (病原生)

背景:

レジオネラ肺炎菌は宿主細胞の真空中に複製することでレジオネラ病を引き起こす.
Icm/Dot型IV分泌システムは,真空球の形成と維持に不可欠です.
この特殊な真空を制御する特定のメカニズムに関する知識は限られている.

研究の目的:

レジオネラ菌と宿主細胞の相互作用におけるLepAとLepBタンパク質の役割を調査する.
バキュオールの発達と病原体の拡散におけるLepタンパク質の機能を明らかにする.

主な方法:

LepAとLepBを欠いた変異レジオネラ菌株の分析.
Icm/Dot分泌システム経由でLepタンパク質の伝達メカニズムを調査する.
レプタンパク質と原生宿主細胞経路との相互作用を研究する.

主要な成果:

LepAとLepBは,ICM/Dot依存の経路を通って宿主細胞に届けられます.
Lepタンパク質が欠けている変異株は,真空球の形成または維持が変化している.
証拠によると,Lepタンパク質は,原生類のエクソサイト経路と相互作用する可能性があります.

結論:

レプタンパク質は,レジオネラ菌の複製のための宿主真空環境の調節に関与する可能性が高い.
この発見は,レジオネラ・カマンダーが,拡散のためのエクソサイト的経路をホストする新しいメカニズムを示唆しています.
Lepタンパク質に関するさらなる研究は,レジオネール病の新たな治療標的を明らかにする可能性がある.

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