Abstract
Fluctuations in mitochondrial matrix Ca2+ plays a critical role in matching energy production to cellular demand through direct effects on oxidative phosphorylation and ATP production. Disruption in mitochondrial Ca2+ homeostasis, particularly under pathological conditions such as ischemia or heart failure, can lead to mitochondrial dysfunction, energy deficit, and eventually death of cardiomyocytes. The primary channel regulating acute mitochondrial Ca2+ influx is the mitochondrial Ca2+ uniporter (mtCU), which is regulated by the mitochondrial Ca2+ uptake (MICU) proteins that were examined here.
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