通过NF-kappaB诱导gadd45beta会降低对亲细胞亡的JNK信号的调节
E De Smaele1, F Zazzeroni, S Papa
1The Gwen Knapp Center for Lupus and Immunology research, The University of Chicago, Illinois 60637, USA.
Nature
|November 20, 2001
概括
核因子-kappaB (NF-kappaB) 转录因子通过降低c-Jun氨基终端激酶 (JNK) 途径来促进细胞存活. 这种NF-kappaB介导的JNK信号的抑制对于控制细胞死亡至关重要.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 核因子-kappaB (NF-kappaB) 转录因子调节免疫反应,炎症和细胞存活.
- NF-kappaB的激活对抗由各种触发因素诱导的亡,包括TNF受体的参与.
- 在癌症中NF-kappaB的抗亡作用是显著的,有助于瘤发生和对治疗的抗性.
研究的目的:
- 阐明NF-kappaB抗亡活性背后的分子机制.
- 建立NF-kappaB信号传递与c-Jun氨基终端激酶 (JNK) 途径之间的联系.
- 确定NF-kappaB在调节细胞死亡途径中的作用.
主要方法:
- 研究了NF-kappaB和JNK信号级联之间的相互作用.
- 分析了参与压力和亡的基因的转录调节.
- 利用TNF受体信号作为研究细胞死亡的模型系统.
主要成果:
- 证明NF-kappaB复合体降低了JNK级联的下调.
- 确定了Gadd45beta/Myd118作为一个关键的NF-kappaB上调基因,可以抑制JNK信号传递.
- 表明NF-kappaB依赖于JNK的抑制对于预防TNF-α诱导的亡至关重要.
结论:
- 建立了NF-kappaB和JNK通路之间的直接联系,揭示了一个新的细胞保护机制.
- 突出了NF-kappaB介导的JNK信号抑制在控制编程细胞死亡中的重要性.
- 表明持续的JNK激活有助于亡反应,特别是在TNF-alpha信号传递的背景下.
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