Impairing GPX4 upregulation induced by OXPHOS deficiency through the inhibition of the integrated stress response, by knocking out either the mitochondrial protease OMA1 or its substrate DELE1, aggravates the cardiomyopathy of Cox10-/- mice by decreasing GPX4 to WT levels, thus inducing ferroptosis (Ahola et al., 2022). Here, OMA1 is linked to cardiomyopathy.