DOI: 10.1161/circ.148.suppl_1.17143 ISSN: 0009-7322

Abstract 17143: Lorundrostat for Treatment of Obesity-Related, Aldosterone-Dependent Hypertension - An Endotype-Specific, Targeted Approach to the Treatment of Uncontrolled Hypertension

David Rodman, Borut Cizman
  • Physiology (medical)
  • Cardiology and Cardiovascular Medicine

Hyperaldosteronism manifests as low renin hypertension (HTN) with endothelial dysfunction and vascular fibrosis. In the aging vasculature, these pathological changes may be exacerbated by non-genomic aldosterone signaling via GPER (GPR30), which is not inhibited by mineralocorticoid receptor antagonists (MRA). In trials with healthy subjects and patients with uncontrolled HTN, the novel, highly selective aldosterone synthase inhibitor, lorundrostat, reduced median morning plasma aldosterone concentration (PAC) by approximately 70%. PAC reduction was dose-dependent and associated with a mean placebo-adjusted reduction in systolic blood pressure (BP) of -16.7 mmHg (N=15, p<0.01, 90% CI: -25.5 to -7.9 mmHg) and -12.3 mmHg (N=12, p<0.03, 90% CI: -21.6 to -3.1 mmHg) in subjects with body mass index (BMI)

30 kg/m 2 receiving 50mg or 100mg QD of lorundrostat, respectively. In contrast, in non-obese individuals, BP reductions were modest and not statistically significant. Salutary BP effects of 100mg QD lorundrostat at week 8 were observed in individuals with normal to high renin (N=30, -11.4 ± 2.5 mmHg) and low renin (N=25, -11.9 ± 2.8 mmHg). Linkage between obesity, HTN and increased aldosterone has been suggested by studies in a mouse model of obesity, hyperleptinemia and HTN. In this model, both leptin receptor blockade and lorundrostat restored normal BP. As anticipated, in the Phase 2 trial, mean serum leptin was elevated at baseline in obese (N=103, 37.8 ± 2.4 ng/mL) v. non-obese (N=88, 21.6 ± 1.9 ng/mL, p<0.001) individuals with uncontrolled HTN and could be a useful biomarker to identify lorundrostat-responsive HTN. MRAs are recommended as fourth-line therapy for resistant HTN. However, MRAs can be associated with hormonal side-effects and stimulate excess aldosterone production that may increase non-genomic signaling, endothelial dysfunction and vessel wall remodeling. Lorundrostat has neither of these liabilities and may be an important new antihypertensive. Renin-independent, leptin- and aldosterone-dependent HTN defines a unique endotype in obese hypertensive individuals. Endotype-targeted therapy may allow early identification, intervention and improved BP control in obese individuals.

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