Logo image
PPARγ and retinol binding protein 7 form a regulatory hub promoting antioxidant properties of the endothelium
Journal article   Open access   Peer reviewed

PPARγ and retinol binding protein 7 form a regulatory hub promoting antioxidant properties of the endothelium

Addison W Woll, Frederick W Quelle and Curt D Sigmund
Physiological genomics, Vol.49(11), pp.653-658
11/01/2017
DOI: 10.1152/physiolgenomics.00055.2017
PMCID: PMC5792137
PMID: 28916634
url
https://doi.org/10.1152/physiolgenomics.00055.2017View
Published (Version of record) Open Access

Abstract

Peroxisome proliferator-activated receptors (PPARs) are a family of conserved ligand-activated nuclear receptor transcription factors heterogeneously expressed in mammalian tissues. PPARγ is recognized as a master regulator of adipogenesis, fatty acid metabolism, and glucose homeostasis, but genetic evidence also supports the concept that PPARγ regulates the cardiovascular system, particularly vascular function and blood pressure. There is now compelling evidence that the beneficial blood pressure-lowering effects of PPARγ activation are due to its activity in vascular smooth muscle and endothelium, through its modulation of nitric oxide-dependent vasomotor function. Endothelial PPARγ regulates the production and bioavailability of nitric oxide, while PPARγ in the smooth muscle regulates the vasomotor response to nitric oxide. We recently identified retinol binding protein 7 (RBP7) as a PPARγ target gene that is specifically and selectively expressed in the endothelium. In this review, we will discuss the evidence that RBP7 is required to mediate the antioxidant effects of PPARγ and mediate PPARγ target gene selectivity in the endothelium.

Details

Metrics

Logo image