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NF-κB is a target of AKT in anti-apoptotic PDGF signalling

机译:NF-κB是抗凋亡PDGF信号传导中AKT的靶标

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摘要

The mechanisms of cell proliferation and transformation are intrinsically linked to the process of apoptosis: the default of proliferating cells is to die unless specific survival signals are provided. Platelet-derived growth factor (PDGF) is a principal survival factor that inhibits apoptosis and promotes proliferation, but the mechanisms mediating its anti-apoptotic properties are not completely understood. Here we show that the transcription factor NF-κB is important in PDGF signalling. NF-蔅 transmits two signals: one is required for the induction of proto-oncogene c-myc and proliferation, and the second, an anti-apoptotic signal, counterbalances c-Myc cytotoxicity. We have traced a putative pathway whereby PDGF activates NF-κB through Ras and phospatidylinositol-3-kinase (PI(3)K) to the PKB/Akt protein kinase and the IκB kinase (IKK); NF-κB thus appears to be a target of the anti-apoptotic Ras/PI(3)K/Akt pathway. We show that, upon PDGF stimulation, Akt transiently associates in vivo with IKK and induces IKK activation. These findings establish a role for NF-κB in growth factor signalling and define an anti-apoptotic Ras/PI(3)K/Akt/IKK/NF-κB pathway, thus linking anti-apoptotic signalling with transcription machinery.
机译:细胞增殖和转化的机制与凋亡过程有内在联系:除非提供特定的生存信号,否则增殖细胞的默认状态是死亡。血小板衍生的生长因子(PDGF)是抑制细胞凋亡并促进增殖的主要生存因子,但是介导其抗凋亡特性的机制尚不完全清楚。在这里,我们表明转录因子NF-κB在PDGF信号传导中很重要。 NF-γ传递两种信号:一种是原癌基因c-myc的诱导和增殖所必需的,另一种是抗凋亡信号,可抵消c-Myc的细胞毒性。我们已经找到了一个推定的途径,PDGF通过Ras和磷脂酰肌醇3激酶(PI(3)K)激活NF-κB到PKB / Akt蛋白激酶和IκB激酶(IKK)。因此,NF-κB似乎是抗凋亡Ras / PI(3)K / Akt途径的目标。我们显示,在PDGF刺激后,Akt在体内与IKK短暂关联并诱导IKK激活。这些发现建立了NF-κB在生长因子信号传导中的作用,并定义了抗凋亡Ras / PI(3)K / Akt / IKK /NF-κB途径,从而将抗凋亡信号与转录机制联系起来。

著录项

  • 来源
    《Nature》 |1999年第6748期|p.86-90|共5页
  • 作者

    J A Romashkova; S S Makarov;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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