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Open AccessArticle

The Contribution of EDF1 to PPARγ Transcriptional Activation in VEGF-Treated Human Endothelial Cells

Dipartimento di Scienze Biomediche e Cliniche L. Sacco, Università degli Studi di Milano, I-20157 Milan, Italy
*
Author to whom correspondence should be addressed.
The two authors contributed equally to this work.
Int. J. Mol. Sci. 2018, 19(7), 1830; https://doi.org/10.3390/ijms19071830
Received: 31 May 2018 / Accepted: 14 June 2018 / Published: 21 June 2018
(This article belongs to the Special Issue PPARs in Cellular and Whole Body Energy Metabolism)
Vascular endothelial growth factor (VEGF) is important for maintaining healthy endothelium, which is crucial for vascular integrity. In this paper, we show that VEGF stimulates the nuclear translocation of endothelial differentiation-related factor 1 (EDF1), a highly conserved intracellular protein implicated in molecular events that are pivotal to endothelial function. In the nucleus, EDF1 serves as a transcriptional coactivator of peroxisome proliferator-activated receptor gamma (PPARγ), which has a protective role in the vasculature. Indeed, silencing EDF1 prevents VEGF induction of PPARγ activity as detected by gene reporter assay. Accordingly, silencing EDF1 markedly inhibits the stimulatory effect of VEGF on the expression of FABP4, a PPARγ-inducible gene. As nitric oxide is a marker of endothelial function, it is noteworthy that we report a link between EDF1 silencing, decreased levels of FABP4, and nitric oxide production. We conclude that EDF1 is required for VEGF-induced activation of the transcriptional activity of PPARγ. View Full-Text
Keywords: endothelial cells; vascular endothelial growth factor; Peroxisome proliferator-activated receptor γ; Endothelial Differentiation-related factor 1 endothelial cells; vascular endothelial growth factor; Peroxisome proliferator-activated receptor γ; Endothelial Differentiation-related factor 1
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Cazzaniga, A.; Locatelli, L.; Castiglioni, S.; Maier, J. The Contribution of EDF1 to PPARγ Transcriptional Activation in VEGF-Treated Human Endothelial Cells. Int. J. Mol. Sci. 2018, 19, 1830.

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