Coenzyme Q10 (CoQ10) (CoQ10)

Coenzyme Q10 (CoQ10), also known as ubiquinone, is a vital lipophilic molecule located within the inner mitochondrial membrane where it functions as a mobile electron carrier in the electron transport chain (StatPearls, 2023). It facilitates the transfer of electrons from Complex I and Complex II to Complex III, a critical step in the generation of adenosine triphosphate (ATP) through oxidative phosphorylation (PubChem, CID 5281915). Beyond its role in bioenergetics, the CoQ10 pool acts as a potent lipid-soluble antioxidant, protecting mitochondrial membranes and lipoproteins from oxidative damage and playing a key role in the prevention of ferroptosis (Hernandez-Camacho et al., 2018). Deficiencies in the CoQ10 pool, whether primary (genetic) or secondary (due to aging or drugs like statins), are linked to mitochondrial diseases, heart failure, and neurodegenerative disorders (NIH Office of Dietary Supplements, 2020). Therapeutically, the CoQ10 pool is targeted through direct supplementation or synthetic analogs like idebenone to restore respiratory chain function and mitigate oxidative stress (Garrido-Maraver et al., 2014). However, clinical efficacy can be limited by its high hydrophobicity and poor oral bioavailability, leading to the development of mitochondria-targeted formulations like MitoQ (Smith et al., 2012).

Other names

UbiquinoneUbiquinolCoQQ10Vitamin Q10Mitochondrial CoQ10 pool

Restoration of electron flow in the mitochondrial respiratory chain, scavenging of reactive oxygen species (ROS), inhibition of lipid peroxidation, and maintenance of mitochondrial membrane potential.