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Cardiovascular response to small molecule APJ activation.

08:00 EDT 24th March 2020 | BioPortfolio

Summary of "Cardiovascular response to small molecule APJ activation."

Heart failure (HF) remains a grievous illness with poor prognosis even with optimal care. The apelin receptor (APJ) counteracts the pressor effect of angiotensin II, attenuates ischemic injury and has the potential to be a novel target to treat HF. Intravenous administration of apelin improves cardiac function acutely in HF patients. However, its short half-life restricts its use to infusion therapy. To identify a longer acting APJ agonist, we conducted a medicinal chemistry campaign leading to the discovery of potent small-molecule APJ agonists with comparable activity to apelin by mimicking the C-terminal portion of apelin-13. Acute infusion increased systolic function and reduced systemic vascular resistance in two rat models of impaired cardiac function. Similar results were obtained in an anesthetized but not a conscious canine HF model. Chronic oral dosing in a rat myocardial infarction model reduced myocardial collagen content and improved diastolic function to a similar extent as losartan, a RAS antagonist standard of care therapy, but lacked additivity with co-administration. Collectively, this work demonstrates the feasibility of developing clinical viable potent small molecule agonists that mimic the endogenous APJ ligand with more favorable drug-like properties and highlight potential limitations for APJ agonism for this indication.

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This article was published in the following journal.

Name: JCI insight
ISSN: 2379-3708
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