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ドロソフィラRNAiのスクリーンは,ミコバクテリア感染症に必要なCD36ファミリーメンバーを明らかにします
Jennifer A Philips1, Eric J Rubin, Norbert Perrimon
1Department of Genetics, Harvard Medical School, 77 Louis Pasteur Avenue, Boston, MA 02115, USA. jphilips@partners.org
Science (New York, N.Y.)
|July 16, 2005
まとめ
研究者らは,菌根菌の侵入と生存に不可欠な宿主因子を特定しました. 特定のCD36ファミリーのメンバーであるPeste (Pes) は,菌根菌の吸収を媒介し,天生的免疫におけるスキャベンジャー受容体の保存された役割を強調しています.
科学分野:
- 細胞生物学 細胞生物学
- 免疫学 免疫学とは
- 微生物学 微生物学とは
背景:
- Mycobacterium tuberculosisはマクロファージの中で生き残り,ホストの防御に重大な課題を投げかけています.
- 病原体の侵入と生存に関与する宿主因子の理解は,新しい治療戦略の開発に不可欠です.
研究 の 目的:
- 菌根菌の侵入と細胞内生存に不可欠な宿主因子を特定する.
- マクロファージとミコバクテリアの相互作用における特定された要因の特定の役割を調査する.
主な方法:
- ドロソフィラのマクロファージのような細胞で全ゲノムRNA干渉スクリーンを実施した.
- Mycobacterium fortuitumは,ファゴサイトーシスと感染症に関与する宿主因子のスクリーニングに使用されました.
主要な成果:
- スクリーンでは,一般的なファゴサイトーシスに必要な要因と,特にミコバクテリア感染に重要な要因を特定しました.
- Peste (Pes) というCD36ファミリーのメンバーは,菌根菌の吸収には不可欠であるが,E. coliやS. aureusのような他の細菌には欠かせないことが判明した.
- 哺乳類のB級スキャベンジャー受容体 (SRs) は,非ファゴサイト細胞への細菌の吸収を促進し,SR-BIとSR-BIIはM. fortuitumの吸収を独占的に媒介する.
結論:
- この研究では,ペスト (Pes) を含む新しい宿主因子を明らかにし,宿主細胞とのミコバクテリアの相互作用を調節しています.
- モデル認識とミコバクテリアに対する先天的免疫におけるクラスBのスキャベンジャー受容体の役割の保存が示唆されています.
- これらの発見は,宿主-病原体相互作用の洞察と,抗ミコバクテリア療法のための潜在的な標的を提供します.
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