Researches establish an indispensable role of mitochondrial dysfunction in septic cardiomyopathy. We aimed to investigate the effects of long noncoding RNA (LncRNA) SOX2 overlapping transcript (SOX2OT) on mitochondrial dysfunction in septic cardiomyopathy. We observed an obvious overexpression of SOX2OT in septic hearts and cardiomyocytes. Knockdown of SOX2OT in mice recovered the reduced cardiac function, and improved the mitochondrial membrane potential impaired by lipopolysaccharide (LPS). SOX2OT overexpressed mice showed the opposite situation. In parallel, knockdown of SOX2OT in cardiomyocytes restored the mitochondrial membrane potential, along with reduced mitochondrial reactive oxygen species production induced by LPS, while overexpression of SOX2OT reversed these effects. Mechanistically, SOX2OT could regulate mitochondrial dysfunction in septic cardiomyopathy via SOX2. In general, SOX2OT contributed to mitochondrial dysfunction progression via inhibiting SOX2 expression in septic cardiomyopathy, which may provide a new insight for treatment of septic cardiomyopathy.
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