Prolonged activation of cAMP signaling leads to endothelial barrier disruption via transcriptional repression of RRAS

Carole Y. Perrot, Junko Sawada, Masanobu Komatsu

Research output: Contribution to journalArticle

Abstract

The increase in cAMP levels in endothelial cells triggers cellular signaling to alter vascular permeability. It is generally considered that cAMP signaling stabilizes the endothelial barrier function and reduces permeability. However, previous studies have only examined the permeability shortly after cAMP elevation and thus have only investigated acute responses.Because cAMPis a key regulator of gene expression, elevatedcAMPmay have a delayed but profound impact on the endothelialpermeabilityby altering the expression of the genes that are vital for the vessel wall stability. The small guanosine triphosphate hydrolase Ras-related protein (R-Ras) stabilizes VE-cadherin clustering and enhances endothelial barrier function, thereby stabilizing the integrity of blood vessel wall.Herewe show that cAMP controls endothelial permeability through RRAS gene regulation. The prolonged cAMP elevation transcriptionally repressed RRAS in endothelial cells via a cAMP response element-binding 3 (CREB3)-dependent mechanism and significantly disrupted the adherens junction. These effects resulted in a marked increase of endothelial permeability that was reversed by R-Ras transduction. Furthermore, cAMP elevation in the endothelium by prostaglandin E2 or phosphodiesterase type 4 inhibition caused plasma leakage from intact microvessels in mouse skin. Our study demonstrated that, contrary to the widely accepted notion, cAMP elevation in endothelial cells ultimately increases vascular permeability, and the cAMP-dependent RRAS repression critically contributes to this effect.

Original languageEnglish (US)
Pages (from-to)5793-5812
Number of pages20
JournalFASEB Journal
Volume32
Issue number11
DOIs
StatePublished - Nov 1 2018
Externally publishedYes

Fingerprint

Endothelial cells
Permeability
Chemical activation
Gene expression
Endothelial Cells
Capillary Permeability
Type 4 Cyclic Nucleotide Phosphodiesterase
Cell signaling
Blood vessels
Response Elements
Hydrolases
Guanosine Triphosphate
Gene Expression
Adherens Junctions
Dinoprostone
ras Proteins
Skin
Regulator Genes
Genes
Microvessels

Keywords

  • CREB
  • Endothelial permeability
  • Prostaglandin E2
  • Vascular leakage

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Molecular Biology
  • Genetics

Cite this

Prolonged activation of cAMP signaling leads to endothelial barrier disruption via transcriptional repression of RRAS. / Perrot, Carole Y.; Sawada, Junko; Komatsu, Masanobu.

In: FASEB Journal, Vol. 32, No. 11, 01.11.2018, p. 5793-5812.

Research output: Contribution to journalArticle

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