Key result
OMA1 ablation prevents cardiomyocyte death across multiple murine heart failure models.
Heart failure (HF) is a major health and economic burden in developed countries. It has been proposed that the pathogenesis of HF may involve the action of mitochondria. We evaluate three different mouse models of HF: tachycardiomyopathy, HF with preserved left ventricular (LV) ejection fraction (LVEF), and LV myocardial ischemia and hypertrophy. Regardless of whether LVEF is preserved, our results indicate that the three models share common features: an increase in mitochondrial reactive oxygen species followed by ultrastructural alterations in the mitochondrial cristae and loss of mitochondrial integrity that lead to cardiomyocyte death. We show that the ablation of the mitochondrial protease OMA1 averts cardiomyocyte death in all three murine HF models, and thus loss of OMA1 plays a direct role in cardiomyocyte protection. This finding identifies OMA1 as a potential target for preventing the progression of myocardial damage in HF associated with a variety of etiologies.
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Acín‐Pérez et al. (2018) studied Heart failure (murine models). Ablation of the stress protease OMA1 was evaluated on Cardiomyocyte death. Ablation of the mitochondrial protease OMA1 averted cardiomyocyte death in three distinct murine heart failure models, identifying it as a potential therapeutic target.
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