Substrate stiffening promotes VEGF-A functions via the PI3K/Akt/mTOR pathway.

Substrate stiffening promotes VEGF-A functions via the PI3K/Akt/mTOR pathway.
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DOI:
10.1016/j.bbrc.2021.11.030
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发表时间:
2022-01-01
影响因子:
3.1
通讯作者:
Krishnan R
Krishnan R
中科院分区:
生物学4区
文献类型:
--
作者:
Husain A;Khadka A;Ehrlicher A;Saint-Geniez M;Krishnan R

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虽然现在已经确定底物硬度调节血管内皮生长因子- a (VEGF-A)介导的信号传导和功能,但因果机制仍然知之甚少。在这里,我们报告了PI3K/Akt/mTOR信号通路的潜在作用。该途径在较硬的底物上被激活,被VEGF-A刺激放大,并与内皮细胞(EC)增殖、收缩、促血管生成分泌和毛细血管样管形成增强相关。在以EC和视网膜色素上皮(RPE)介导的血管生成为特征的晚期老年性黄斑变性中,这些数据表明底物僵硬是一种新的病因机制,Akt/mTOR抑制是一种新的治疗途径。
While it is now well-established that substrate stiffness regulates vascular endothelial growth factor-A (VEGF-A) mediated signaling and functions, causal mechanisms remain poorly understood. Here, we report an underlying role for the PI3K/Akt/mTOR signaling pathway. This pathway is activated on stiffer substrates, is amplified by VEGF-A stimulation, and correlates with enhanced endothelial cell (EC) proliferation, contraction, pro-angiogenic secretion, and capillary-like tube formation. In the settings of advanced age-related macular degeneration, characterized by EC and retinal pigment epithelial (RPE)-mediated angiogenesis, these data implicate substrate stiffness as a novel causative mechanism and Akt/mTOR inhibition as a novel therapeutic pathway.
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