RICK/Rip2/CARDIAKは,先天性および適応性免疫システムの受容体に対するシグナル伝達を媒介する
Koichi Kobayashi1, Naohiro Inohara, Lorraine D Hernandez
1Section of Immunobiology, Yale University School of Medicine, New Haven, Connecticut 06520, USA.
Nature
|March 15, 2002
まとめ
Rip2は,先天的および適応的免疫を橋渡しする重要なキナーゼです. 信号トランスデューサとして作用し,Toll型受容体とT細胞受容体からの信号を統合して,効果的な免疫反応を起こす.
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.
- 細胞シグナル伝達 細胞信号伝達
背景:
- 免疫系には先天性免疫と適応性免疫があり,それぞれが異なる受容体を持っています.
- トール型受容体 (TLR) と抗原特異受容体は,それぞれ先天性および適応性免疫の重要な構成要素である.
研究 の 目的:
- 生まれつきの免疫反応と適応免疫反応の両方の信号伝達経路におけるRip2キナーゼの役割を調査する.
- Rip2が異なる免疫受容体ファミリーの信号を統合するかどうかを判断する.
主な方法:
- 刺激に対する免疫反応を評価するために,Rip2欠乏細胞を利用した.
- トール型受容体2 (TLR2) 信号複合体へのリップ2の徴募を調査した.
- 分析されたサイトカインの産生,NF-kappaBの活性化,T細胞の増殖と分化.
主要な成果:
- Rip2欠乏症は,TLRs (TLR2/3/4) によって刺激されるサイトカインの産生を低下させたが,TLR9.9はそうではなかった.
- Rip2欠乏細胞は,IL-1とIL-18受容体シグナル伝達とNodタンパク質シグナル伝達に対して過敏反応を示した.
- リップ2欠乏性T細胞は,T細胞受容体 (TCR) の関与時に,NF-kappaBの活性化,IL-2の生成,増殖,TH1の分化に障害を示した.
結論:
- Rip2は,先天性および適応性免疫の両方の重要な信号トランスデューサーおよびインテグレーターとして機能します.
- Rip2は,TLR,IL-1/IL-18受容体,ノドタンパク質,TCRを通じた最適なシグナル伝達に不可欠である.
- Rip2はT細胞の活性化,増殖,分化に重要な役割を果たしています.
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