CKD and Muscle Mitochondrial Energetics

Chronic kidney disease (CKD) leads to the retention of uremic solutes that disrupt skeletal muscle function1 leading to reduced physical performance and mobility limitation2. Disruption of muscle mitochondrial energetics in CKD may precede the onset of detectable functional limitations. In particular, reduced coupling of ATP production to oxygen consumption (P/O ratio) within mitochondria of skeletal muscle indicates oxidative stress, impaired metabolism, and reduced exercise efficiency3–6. Comprehensive analysis of skeletal muscle mitochondrial energetics in CKD patients has been limited by lack of precise, real-time, non-invasive techniques.