結核性ミコバクテリアによる感染は,そのアメーバ宿主からの非リンチ性排泄によって広がります
Monica Hagedorn1, Kyle H Rohde, David G Russell
1Département de Biochimie, Faculté des Sciences, Université de Genève, Sciences II, 30 quai Ernest Ansermet, CH-1211 Genève-4, Switzerland.
Science (New York, N.Y.)
|March 28, 2009
まとめ
Mycobacterium tuberculosisは,以前は感染の拡散について理解されていなかった新しい細胞放出メカニズムによって広がります. このDictyosteliumの発見は,結核ワクチンの開発と治療法の開発に新たな道を開く.
科学分野:
- 微生物学 微生物学とは
- 細胞生物学 細胞生物学
- 感染症 感染症は感染症です.
背景:
- Mycobacterium tuberculosisの感染を理解するには,その拡散メカニズムの知識が必要です.
- 宿主細胞の侵入は理解されているが,菌根菌の脱出と拡散は不明である.
研究 の 目的:
- 病原性ミコバクテリアが宿主細胞から脱出するメカニズムを調査する.
- Mycobacterium tuberculosisの保存された拡散戦略を特定するために.
主な方法:
- 病原菌菌菌のモデル宿主としてDictyostelium discoideumを利用した.
- マイコバクテリアと宿主の相互作用を顕微鏡検査と遺伝子解析を用いて観察した.
- ホストの細胞骨格とミコバクテリアの分泌システムの役割を研究した.
主要な成果:
- Mycobacterium tuberculosisとMycobacterium marinumが,Mycobacterium aviumではないが,エジェクトソームと呼ばれるアクチンベースの構造を通して放出されていることが発見されました.
- これは,保存された,非リチンの拡散メカニズムであると特定しました.
- 宿主細胞骨格の調節体とミコバクテリアのESX-1分泌システムに対する要求を示した.
結論:
- エジェクトソームは,宿主細胞から特定のミコバクテリアの拡散を促進します.
- この保存されたメカニズムは,結核感染症の制御のための新しい標的を提供します.
- 宿主-病原菌の相互作用に関するさらなる研究は,ワクチン開発と治療の開発に情報を提供することができます.
さらに関連する動画
09:02An Experimental Model to Study Tuberculosis-Malaria Coinfection upon Natural Transmission of Mycobacterium tuberculosis and Plasmodium berghei
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10:04Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
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