T細胞CD3-ゼータ鎖の合成不能:部分的なT細胞受容体複合体の構造と機能
J J Sussman1, J S Bonifacino, J Lippincott-Schwartz
1Division of Cancer Treatment, National Cancer Institute, Bethesda, Maryland 20892.
Cell
|January 15, 1988
まとめ
CD3-zeta鎖は,T細胞抗原受容体の正常な機能とシグナル伝達に不可欠である. その欠如は受容体の運命を左右し,T細胞の反応に影響するトランスメブランシグナル伝達に影響します.
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:
- T細胞抗原受容体 (TCR) は,変数 (Ti) と定数 (CD3) 鎖で構成されています.
- 個々のCD3コンポーネントの正確な機能は,ほとんど不明のままです.
研究 の 目的:
- TCR機能におけるCD3コンポーネントの特定の役割を調査する.
- CD3-zetaによって調節されるシグナル伝達経路を解明する.
主な方法:
- ネズミのT細胞ハイブリドロマの化学変異.
- 変異したCD3/Ti発現を持つ変異体の選択.
- 抗原と抗体に対するT細胞反応の分析.
主要な成果:
- CD3-zetaが欠けていた変種は,表面TCRの減少を示したが,直接クロスリンクで信号を発信できた.
- このCD3-zeta欠乏変種は,抗原とanti-Thy-1抗体に対する反応が低下したことを示した.
- フォスファディチルイノシトールの水解とIL-2の生成は,受容体クロスリンク時にCD3-zetaなしで発生しました.
結論:
- CD3-zetaは,TCRの適切な細胞内トラフィックとシグナル伝達に不可欠です.
- CD3-zetaは,T細胞の生理学的に重要なトランスメブランシグナル伝達を媒介する上で重要な役割を果たします.
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