Inibizione della calpain-mediate HMGB1 allevia l'inflammazione e la disfunzione cardiaca indotte da cibi ultra-elaborati.

Increased consumption of ultra-processed foods (UPFs) is a risk factor for metabolic disorder-associated heart failure (HF). Here, we demonstrate that UPF-induced calpain-1 aggravated oxidative stress, thereby increasing high mobility group box 1-mediated (HMGB1-mediated) myocardial inflammation, which contributes to cardiac dysfunction. After illustrating the dysregulated inflammatory pathways in human and murine hearts upon metabolic stress, we revealed an increase in calpain-1 alongside profound oxidative stress and inflammation in the failing myocardium. Mechanistically, in neonatal rat cardiomyocytes and human induced pluripotent stem cell-derived cardiomyocytes, HMGB1 was upregulated b