在T淋巴细胞的共刺激过程中,JNK参与信号整合
1Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla 92093-0636.
Cell
|June 3, 1994
概括
激活T细胞需要多个信号. JNK1/JNK2激酶对于介质蛋白-2 (IL-2) 生产至关重要,它集成来自T细胞受体 (TCR) 和CD28共刺激的信号.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 激活T淋巴细胞和产生IL-2需要不同的信号通路.
- 关键信号包括醇 (TPA) 和Ca2+离子体,或T细胞受体 (TCR) 和CD28共刺激.
研究的目的:
- 为了研究不同T细胞激活刺激对基激活蛋白 (MAP) 激酶的影响.
- 阐明特定MAP激酶在整合T细胞激活和IL-2产生信号中的作用.
主要方法:
- 使用TPA/Ca2+离子体和TCR/CD28共刺激来刺激T细胞.
- 评估JNK1/JNK2和ERK1/ERK2激活,使用西方抹黑或酶试验.
- 使用环素A (CsA) 和一种特定于JNK的抑制剂的抑制研究.
主要成果:
- 完全激活JNK1和JNK2需要组合刺激 (TPA/Ca2+或TCR/CD28),而不是单个信号.
- 环素A (CsA) 抑制了协同的JNK激活,反映了其对IL-2诱导的影响.
- 单独通过TPA或TCR刺激激活ERK1和ERK2,并不受Ca2+,CD28或CSA的影响.
- 抑制JNK介导的Jun酸化降低了IL-2促进体活性.
结论:
- 对于T细胞激活的信号整合发生在JNK激活的水平上.
- 在TCR和CD28共刺激后,JNK激酶在调解IL-2生成中发挥着关键作用.
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