GLP-1受容体作動薬は、肺高血圧症におけるGSK3β-Drp1シグナル伝達の阻害により右室のミトコンドリア機能障害を軽減する
Lin Zhao1, Yanghong Liu2, Ziwei Ou1
1Department of Cardiovascular Medicine, The Third Xiangya Hospital, Central South University, Changsha, 410013, China.
Abstract:
Right ventricular (RV) dysfunction is a critical complication of pulmonary hypertension (PH) with limited treatment strategies. This study evaluated the therapeutic efficacy of the GLP-1 agonist semaglutide on RV dysfunction in rodent PH models, focusing on mitochondrial dynamics and GSK3β-Drp1 signalling. Semaglutide significantly improved RV function, as evidenced by reduced right ventricular systolic pressure (RVSP), hypertrophy index (RV/LV + S), and improved echocardiographic parameters (RVEDA, RVFAC, TAPSE). Histological analysis revealed reduced RV hypertrophy and fibrosis, along with preserved mitochondrial ultrastructure in semaglutide-treated PH animals. Semaglutide restored GSK3β-Drp1 signalling, maintained mitochondrial membrane potential, and decreased mitochondrial fragmentation in primary cardiomyocytes via GLP-1R activation. Modulation of GSK3β expression further confirmed its role in GLP-1's protective effects. These findings collectively suggest that GLP-1 agonists, such as semaglutide, may represent a novel therapeutic strategy for RV dysfunction by targeting mitochondrial pathology and restoring critical signalling pathways like GSK3β-Drp1.
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