The RNA-binding protein quaking maintains endothelial barrier function and affects VE-cadherin and β-catenin protein expression.

Abstract:

:Proper regulation of endothelial cell-cell contacts is essential for physiological functioning of the endothelium. Interendothelial junctions are actively involved in the control of vascular leakage, leukocyte diapedesis, and the initiation and progression of angiogenesis. We found that the RNA-binding protein quaking is highly expressed by endothelial cells, and that its expression was augmented by prolonged culture under laminar flow and the transcription factor KLF2 binding to the promoter. Moreover, we demonstrated that quaking directly binds to the mRNA of VE-cadherin and β-catenin and can induce mRNA translation mediated by the 3'UTR of these genes. Reduced quaking levels attenuated VE-cadherin and β-catenin expression and endothelial barrier function in vitro and resulted in increased bradykinin-induced vascular leakage in vivo. Taken together, we report that quaking is essential in maintaining endothelial barrier function. Our results provide novel insight into the importance of post-transcriptional regulation in controlling vascular integrity.

journal_name

Sci Rep

journal_title

Scientific reports

authors

de Bruin RG,van der Veer EP,Prins J,Lee DH,Dane MJ,Zhang H,Roeten MK,Bijkerk R,de Boer HC,Rabelink TJ,van Zonneveld AJ,van Gils JM

doi

10.1038/srep21643

subject

Has Abstract

pub_date

2016-02-24 00:00:00

pages

21643

issn

2045-2322

pii

srep21643

journal_volume

6

pub_type

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