DNA-PKcsは,免疫刺激性DNAによる先天性免疫の活性化に必要なものです
1The Sam and Rose Stein Institute for Research on Aging, University of California, San Diego 9500 Gilman Drive 92093, La Jolla, CA, USA. wmchu@ucsd.edu
Cell
|January 4, 2001
まとめ
バクテリアのDNAと合成免疫刺激性オリゴデオキシリボヌクレオチド (ISS-ODN) は,先天的免疫を活性化する. DNA-PKcsとIKKbetaは,このシトカイン応答に不可欠であり,DNA修復と免疫シグナル伝達を結びつける.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- 生まれながらの免疫力
- DNAセンシング DNAセンシング
背景:
- 細菌のDNAと合成免疫刺激性オリゴデオキシリボヌクレオチド (ISS-ODN) は,先天的な免疫反応を刺激することが知られている.
- バクテリアのDNAとISS-ODNによるシグナル伝達の開始の背後にある正確な分子機構は,未確認のままです.
- これらの経路を理解することは,新しい免疫療法を開発し,宿主の防御を理解するために重要です.
研究 の 目的:
- 生まれながらの免疫における細菌DNAとISS-ODNの分子認識メカニズムを解明する.
- これらの分子によって活性化される信号伝達経路におけるDNA-PKcsとIKKbetaの役割を調査する.
- DNA修復経路と先天的な免疫反応の間のリンクを確立するために.
主な方法:
- 細菌DNAとISS-ODNをDNA-PK (DNA-PKcs) の触媒性サブユニットがないマウスに投与する.
- 野生型およびノックアウト型マウス (DNA-PKcs/およびIKKbeta-/-) の骨髄由来マクロファージ (BMDM) のインビトロ刺激.
- サイトカイン誘導 (IL-6およびIL-12) の測定とNF-kappaB活性化の評価.
主要な成果:
- DNA-PKcsが欠けているマウスは,細菌のDNAとISS-ODN.を投与すると,IL-6とIL-12の欠陥誘導を示した.
- DNA-PKcsとIKKbetaは,細菌DNAとISS-ODNへの反応として,正常なサイトカイン生成に不可欠であることが判明しました.
- バクテリアDNAとISS-ODNはDNA-PKを活性化させ,その後IKKとNF-kappaBの活性化に寄与する.
結論:
- DNA-PKcsは,バクテリアのDNAとISS-ODNに対する先天的な免疫反応において,新しい重要な役割を果たします.
- DNA修復機構 (DNA-PKcs) と先天的な免疫信号伝達経路の間に直接的なリンクが確立されています.
- 発見は,DNA-PKcsとIKKbetaが,細菌DNAとISS-ODN.によって開始されるシグナリングカスケードの重要な構成要素であることを明らかにしています.
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