Csk控制抗原受体介导的T系细胞的发育和选择
C Schmedt1, K Saijo, T Niidome
1Laboratory for Lymphocyte Signalling, University of Cologne, Germany. c.schmedt@uni-koeln.de
Nature
|September 11, 1998
概括
在甲状腺细胞中非激活 carboxy-terminal Src 激酶 (Csk) 消除了对 T 细胞发育的 T 细胞前 T 细胞和 alphabeta T 细胞受体 (TCR) 的需求. 这显示了Csksk.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- T细胞的发育依赖于来自T细胞前受体 (pre-TCR) 和alphabetaT细胞受体 (alphabetaTCR) 的信号.
- 在受体参与后,Src-家族蛋白质氨酸激酶 (PTK) 的激活至关重要,但它们在分化中的确切作用尚不清楚.
- 碳氧终端Src激酶 (Csk) 作为Src家族PTKs的负调节剂.
研究的目的:
- 研究Csk在T细胞发育过程中调节Src家族PTK活性中的作用.
- 确定Csk无活化是否影响T细胞分化的依赖于TCR前和alphabetaTCR信号传递.
主要方法:
- 在不成熟的胸细胞中,Csk的遗传失活化.
- 使用流细胞计和细胞表面标记分析分析,分析胸细胞发育和外围T细胞种群.
主要成果:
- 在不成熟的胸细胞中Csk的无活化取消了TCR前,alphabetaTCR和MHCII类的要求.
- CD4+ 8+双阳性和CD4+单阳性胸细胞的发育独立于Csk损失时的TCR前/alphabetaTCR信号.
- 边缘CD4alphabetaT系细胞在不依赖这些受体信号的情况下发展.
结论:
- Csk及其基质对于建立TCR前/alphabetaTCR介导的对alphabeta T细胞发育的控制至关重要.
- Csk作为一个关键的检查点,确保T细胞的发展取决于适当的受体信号.
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