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ATF-2 and Tpl2 regulation of endothelial cell cycle progression and apoptosis.
Cellular Signalling ( IF 4.4 ) Pub Date : 2019-11-21 , DOI: 10.1016/j.cellsig.2019.109481
Gareth W Fearnley 1 , Antony M Latham 1 , Monica Hollstein 2 , Adam F Odell 3 , Sreenivasan Ponnambalam 1
Affiliation  

Cells respond to soluble and membrane-bound factors to activate signalling cascades that control cell proliferation and cell death. Vascular endothelial growth factor A (VEGF-A) is a soluble ligand that modulates a variety of cellular responses including cell proliferation and apoptosis. It is not well understood how VEGF-A signalling pathways regulate cell proliferation and cell death. To address this, we examined VEGF-A-regulated signalling pathways in the cytosol and nucleus and functional requirement for such cellular responses. The VEGF-A-regulated transcription factor, ATF-2, is required for cell cycle proteins such as p53, p21 and Cyclin D1. A cytosolic serine/threonine protein kinase (Tpl2) modulates ATF-2-regulated effects on the endothelial cell cycle. Such regulatory effects impact on endothelial cell proliferation, cell viability and apoptosis. These cellular effects influence complex cell-based organisation such as endothelial tubulogenesis. Our study now provides a framework for incorporating VEGF-A-stimulated signalling events from the cytosol to the nucleus which helps to understand how cell proliferation and apoptosis are controlled.

中文翻译:

ATF-2和Tpl2调节内皮细胞周期进程和凋亡。

细胞对可溶性和膜结合因子起反应,从而激活控制细胞增殖和细胞死亡的信号级联反应。血管内皮生长因子A(VEGF-A)是可溶的配体,可调节多种细胞应答,包括细胞增殖和凋亡。VEGF-A信号通路如何调节细胞增殖和细胞死亡尚不完全清楚。为了解决这个问题,我们检查了胞浆和细胞核中VEGF-A调节的信号通路以及此类细胞反应的功能要求。VEGF-A调节的转录因子ATF-2是细胞周期蛋白(例如p53,p21和Cyclin D1)所必需的。胞质丝氨酸/苏氨酸蛋白激酶(Tpl2)调节对内皮细胞周期的ATF-2调节作用。这种调节作用会影响内皮细胞的增殖,细胞活力和凋亡。这些细胞作用影响复杂的基于细胞的组织,例如内皮细胞微管形成。现在,我们的研究提供了一个框架,用于将VEGF-A刺激的信号事件从胞质溶胶引入细胞核,这有助于了解细胞增殖和凋亡的控制方式。
更新日期:2019-11-22
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