Coenzyme Q10 (CoQ10) is an essential component of the mitochondrial electron transfer system and a potent antioxidant. The impact of CoQ10 supplementation on mitochondrial capacities and the muscle proteome is largely unknown. This study determined the effect of CoQ10 supplementation on muscle CoQ10 concentrations, antioxidant balance, the proteome, and mitochondrial respiratory capacities. In a randomized […]

Coenzyme-Q is vital for mitochondrial respiration, but the impact of coenzyme-Q supplementation on equine skeletal muscle mitochondria is unknown. Exercising Thoroughbred horses (8.7±2.2 yr) were used in a cross-over design to test the hypothesis that supplementation of highly bioavailable coenzyme-Q (Nano-Q10, Kentucky Equine Research) would improve mitochondrial metrics in the gluteus medius. Muscle samples collected […]

Horses have one of the highest skeletal muscle oxidative capacities amongst mammals, which, combined with a high glycolytic capacity, could perturb redox status during maximal exercise. We determined the effect of 30 d of oral coenzyme Q10 and N-acetyl cysteine supplementation (NACQ) on muscle glutathione (GSH), cysteine, ROS, and coenzyme Q10 concentrations, and the muscle […]

In the mitochondria, complexes I and III of the electron transport system (ETS) generate reactive oxygen species (ROS) during exercise that are reduced by antioxidants to mitigate oxidative stress. Among these antioxidants are thiol-based antioxidants such as glutathione as well as coenzyme Q10 (CoQ10), which also transports electrons from complex I and II to complex […]