Anti-Obesity Effects of Rosa rugosa Thunb. Flower Bud Extracts on Lipid Metabolism Regulation in 3T3-L1 Adipocytes and Sprague Dawley Rats

In modern society, obesity and its associated complications have emerged as serious public health concerns, primarily stemming from sedentary lifestyles and carbohydrate-rich diets. Due to the severe side effects often associated with pharmacological anti-obesity agents, emerging global efforts focus on preventive strategies, e.g., dietary modifications and weight gain-suppressing functional foods. In this context, plant-derived metabolites are extensively investigated for their beneficial anti-obesity effects. In this study, we evaluated how <i>Rosa rugosa</i> Thunb. flower bud extract affects fat metabolism in 3T3-L1 preadipocyte cells. The extract significantly inhibited adipocyte differentiation and intracellular triglyceride accumulation in 3T3-L1 cells, enhanced lipolysis, suppressed lipogenesis, and promoted energy metabolism in differentiated adipocytes. In vivo, it reduced body and organ weights and fat mass in high-fat diet-induced obese rats, along with marked adipocyte size and hepatic lipid accumulation reductions. In the epididymal adipose tissue, the extract similarly enhanced lipolytic activity, suppressed lipogenic enzyme expression, and stimulated energy expenditure. Taken together, our results demonstrate the potential of <i>R. rugosa</i> Thunb. flower bud extract in reducing fat accumulation through lipid metabolism modulation both in cellular and animal models. Further studies are warranted to identify the active constituents and evaluate the safety and efficacy of the extract in clinical applications.