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ガレクチン8は,損傷した膀をオートファギーの標的とし,細胞をバクテリアの侵入から守ります
Teresa L M Thurston1, Michal P Wandel, Natalia von Muhlinen
1MRC Laboratory of Molecular Biology, Division of Protein and Nucleic Acid Chemistry, Hills Road, Cambridge CB2 0QH, UK.
Nature
|January 17, 2012
まとめ
ガレクチン8は,細胞の危険受容体として作用し,セルラー小胞に損傷を検知することで,サルモネッラなどの侵入細菌を識別します. これは,病原体を排除するための細胞防衛機構であるオートファギーを開始します.
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:
- オートファギーは,バクテリアの侵入に対する重要な細胞防衛機構です.
- オートファギアアダプターは,病原体を識別するためにパターン認識または危険受容体を必要とします.
- オートファギーの病原体を標識する特定の受容体は,ほとんど特定されていないままです.
研究 の 目的:
- 抗菌的オートファギーの開始に責任を負う特定の危険受容体を特定する.
- この受容体が細菌の侵入を検知し,信号を発するメカニズムを解明する.
- 病原体の増殖を制限するこの受容体の役割を決定する.
主な方法:
- 人間の細胞培養はヒトの細胞培養である.
- コンフォカル顕微鏡によるコンフォカル顕微鏡検査
- 免疫光測定法による測定法
- バクテリア感染モデル (サルモネラ,リステリア,シゲラ)
主要な成果:
- ガレクチン8 (LGALS8) は,細胞性危険受容体として機能します.
- ガレクチン8は,損傷したサルモネラを含む真空管に宿主グリカンを結合することによって,細菌の侵入を検出します.
- ガレクチン8は,NDP52 (CALCOCO2) を誘発し,抗菌自を活性化する.
- ガレクチン8はまた,エンドソーム/ライソソームの不妊損傷やリステリアやシゲラ菌による侵入を検出します.
結論:
- ガレクチン8は,エンドソームとリソームの完全性を監視する多用途の危険受容体です.
- それは,オートファギーを開始することによって,細胞内細菌感染症との闘いにおいて重要な役割を果たします.
- このメカニズムは,サイトゾール内の複雑な炭水化物の欠如を検出し,損傷または侵入を示します.
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