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SIRT1 controls endothelial angiogenic functions during vascular growth

Item Type:Article
Title:SIRT1 controls endothelial angiogenic functions during vascular growth
Creators Name:Potente, M. and Ghaeni, L. and Baldessari, D. and Mostoslavsky, R. and Rossig, L. and Dequiedt, F. and Haendeler, J. and Mione, M. and Dejana, E. and Alt, F.W. and Zeiher, A.M. and Dimmeler, S.
Abstract:The nicotinamide adenine dinucleotide (NAD(+))-dependent histone deacetylase Sir2 regulates life-span in various species. Mammalian homologs of Sir2 are called sirtuins (SIRT1-SIRT7). In an effort to define the role of sirtuins in vascular homeostasis, we found that among the SIRT family, SIRT1 uniquely regulates angiogenesis signaling. We show that SIRT1 is highly expressed in the vasculature during blood vessel growth, where it controls the angiogenic activity of endothelial cells. Loss of SIRT1 function blocks sprouting angiogenesis and branching morphogenesis of endothelial cells with consequent down-regulation of genes involved in blood vessel development and vascular remodeling. Disruption of SIRT1 gene expression in zebrafish and mice results in defective blood vessel formation and blunts ischemia-induced neovascularization. Through gain- and loss-of-function approaches, we show that SIRT1 associates with and deacetylates the forkhead transcription factor Foxo1, an essential negative regulator of blood vessel development to restrain its anti-angiogenic activity. These findings uncover a novel and unexpected role for SIRT1 as a critical modulator of endothelial gene expression governing postnatal vascular growth.
Keywords:SIRT1, HDAC, Endothelial Cells, Angiogenesis, Foxo, Animals, Mice, Zebrafish
Source:Genes & Development
Publisher:Cold Spring Harbor Laboratory Press
Page Range:2644-2658
Date:15 October 2007
Official Publication:https://doi.org/10.1101/gad.435107
External Fulltext:View full text on PubMed Central
PubMed:View item in PubMed

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