Dronedarone hydrochloride reverses obesity-related metabolic syndrome while preserving skeletal muscle mass
Abstract
ABSTRACT: Obesity-driven metabolic syndrome poses a critical global threat, yet standard therapies like GLP-1 receptor agonists trigger substantial lean mass wasting, with muscle loss accounting for up to 40% of reduced weight. Here we identify a non-canonical metabolic application for dronedarone hydrochloride, an anti-arrhythmic benzofuran derivative. In diet-induced and ob/ob obese mice, short-term dronedarone hydrochloride administration dose-dependently reduces food intake, clears visceral and subcutaneous adiposity, and reverses steatohepatitis. Head-to-head trials show that dronedarone hydrochloride achieves glycemic control and fat clearance non-inferior to semaglutide, tirzepatide, and empagliflozin, but uniquely and completely preserves skeletal muscle mass. Mechanistically, dronedarone hydrochloride operates independently of central hypothalamic appetite-regulating neuropeptides and the peripheral leptin pathway. By decoupling fat reduction from sarcopenia, our findings establish dronedarone hydrochloride as a muscle-sparing therapeutic candidate for metabolic syndrome.
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