GLP-1 receptor activation and Epac2 link atrial natriuretic peptide secretion to control of blood pressure - PubMed (original) (raw)
doi: 10.1038/nm.3128. Epub 2013 Mar 31.
Affiliations
- PMID: 23542788
- DOI: 10.1038/nm.3128
GLP-1 receptor activation and Epac2 link atrial natriuretic peptide secretion to control of blood pressure
Minsuk Kim et al. Nat Med. 2013 May.
Abstract
Glucagon-like peptide-1 receptor (GLP-1R) agonists exert antihypertensive actions through incompletely understood mechanisms. Here we demonstrate that cardiac Glp1r expression is localized to cardiac atria and that GLP-1R activation promotes the secretion of atrial natriuretic peptide (ANP) and a reduction of blood pressure. Consistent with an indirect ANP-dependent mechanism for the antihypertensive effects of GLP-1R activation, the GLP-1R agonist liraglutide did not directly increase the amount of cyclic GMP (cGMP) or relax preconstricted aortic rings; however, conditioned medium from liraglutide-treated hearts relaxed aortic rings in an endothelium-independent, GLP-1R-dependent manner. Liraglutide did not induce ANP secretion, vasorelaxation or lower blood pressure in Glp1r(-/-) or Nppa(-/-) mice. Cardiomyocyte GLP-1R activation promoted the translocation of the Rap guanine nucleotide exchange factor Epac2 (also known as Rapgef4) to the membrane, whereas Epac2 deficiency eliminated GLP-1R-dependent stimulation of ANP secretion. Plasma ANP concentrations were increased after refeeding in wild-type but not Glp1r(-/-) mice, and liraglutide increased urine sodium excretion in wild-type but not Nppa(-/-) mice. These findings define a gut-heart GLP-1R-dependent and ANP-dependent axis that regulates blood pressure.
Comment in
- A gut-heart connection in cardiometabolic regulation.
Buglioni A, Burnett JC Jr. Buglioni A, et al. Nat Med. 2013 May;19(5):534-6. doi: 10.1038/nm.3196. Nat Med. 2013. PMID: 23652101 Free PMC article. - Glucagon-like peptide-1 receptor-atrial natriuretic peptide axis: a novel mechanism for blood pressure regulation.
Arora P. Arora P. Circ Cardiovasc Genet. 2013 Oct;6(5):523. doi: 10.1161/CIRCGENETICS.113.000361. Circ Cardiovasc Genet. 2013. PMID: 24129594 No abstract available.
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