The G Protein Biased Small Molecule Apelin Agonist CMF-019 is Disease Modifying in Endothelial Cell Apoptosis In Vitro and Induces Vasodilatation Without Desensitisation In Vivo
Authors
Read, Cai
Nyimanu, Duuamene
Yang, Peiran
Kuc, Rhoda E.
Williams, Thomas L.
Fitzpatrick, Christopher M.
Foster, Richard
Glen, Robert C.
Maguire, Janet J.
Davenport, Anthony P.
Publication Date
2021-01-21Journal Title
Frontiers in Pharmacology
Publisher
Frontiers Media S.A.
Volume
11
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Read, C., Nyimanu, D., Yang, P., Kuc, R. E., Williams, T. L., Fitzpatrick, C. M., Foster, R., et al. (2021). The G Protein Biased Small Molecule Apelin Agonist CMF-019 is Disease Modifying in Endothelial Cell Apoptosis In Vitro and Induces Vasodilatation Without Desensitisation In Vivo. Frontiers in Pharmacology, 11 https://doi.org/10.3389/fphar.2020.588669
Abstract
Signaling through the apelin receptor is beneficial for a number of diseases including pulmonary arterial hypertension. The endogenous small peptides, apelin and elabela/toddler, are downregulated in pulmonary arterial hypertension but are not suitable for exogenous administration owing to a lack of bioavailability, proteolytic instability and susceptibility to renal clearance. CMF-019, a small molecule apelin agonist that displays strong bias towards G protein signaling over β-arrestin (∼400 fold), may be more suitable. This study demonstrates that in addition to being a positive inotrope, CMF-019 caused dose-dependent vasodilatation in vivo (50 nmol 4.16 ± 1.18 mmHg, **p < 0.01; 500 nmol 6.62 ± 1.85 mmHg, **p < 0.01), without receptor desensitization. Furthermore, CMF-019 rescues human pulmonary artery endothelial cells from apoptosis induced by tumor necrosis factor α and cycloheximide (5.66 ± 0.97%, **p < 0.01) by approximately 50% of that observable with rhVEGF (11.59 ± 1.85%, **p < 0.01), suggesting it has disease-modifying potential in vitro. CMF-019 displays remarkable bias at the apelin receptor for a small molecule and importantly recapitulates all aspects of the cardiovascular responses to the endogenous ligand, [Pyr1]apelin-13, in vivo. Additionally, it is able to protect human pulmonary artery endothelial cells from apoptosis, suggesting that the beneficial effects observed with apelin agonists extend beyond hemodynamic alleviation and address disease etiology itself. These findings support CMF-019 as a G protein biased small molecule apelin agonist in vitro and in vivo that could form the basis for the design of novel therapeutic agents in chronic diseases, such as, pulmonary arterial hypertension.
Keywords
Pharmacology, apelin, bias, cardiovascular, in vivo, apoptosis, pulmonary artery endothelial cell, G protein coupled receptor
Identifiers
588669
External DOI: https://doi.org/10.3389/fphar.2020.588669
This record's URL: https://www.repository.cam.ac.uk/handle/1810/317120
Rights
Attribution 4.0 International (CC BY 4.0)
Licence URL: https://creativecommons.org/licenses/by/4.0/
Statistics
Total file downloads (since January 2020). For more information on metrics see the
IRUS guide.