Mitochondrial calcium uniporter (MCU) is a highly selective channel complex located in the inner mitochondrial membrane.
-MCU facilitates the uptake of calcium (Ca²⁺) into the mitochondrial matrix, a process that is crucial for regulating mitochondrial metabolism, cell signaling, and apoptosis.
-Mitochondrial Ca²⁺ uptake via MCU plays a key role in stimulating metabolic enzymes in the tricarboxylic acid (TCA) cycle, thereby influencing energy production.
-Overexpression of MCU has been linked in some studies to enhanced Ca²⁺ uptake, metabolic changes, and increased tumor cell migration.
-In this context, higher MCU levels (or enhanced activity) have been associated with more aggressive tumor behavior and poorer outcomes, although findings may vary with tumor subtype.
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