García-Corzo 2015 Biochim Biophys Acta
|García-Corzo L, Luna-Sánchez M, Doerrier C, Ortiz F, Escames G, Acuña-Castroviejo D, López LC (2015) Ubiquinol-10 ameliorates mitochondrial encephalopathy associated with CoQ deficiency. Biochim Biophys Acta 1842:893-901.|
Abstract: Coenzyme Q10 (CoQ10) deficiency (mtIM 607426) causes a mitochondrial syndrome with variability in the clinical presentations. Patients with CoQ10 deficiency show inconsistent responses to oral ubiquinone-10 supplementation, with the highest percentage of unsuccessful results in patients with neurological symptoms (encephalopathy, cerebellar ataxia or multisystemic disease). Failure in the ubiquinone-10 treatment may be the result of its poor absorption and bioavailability, which may be improved by using different pharmacological formulations. In a mouse model (Coq9(X/X)) of mitochondrial encephalopathy due to CoQ deficiency, we have evaluated oral supplementation with water-soluble formulations of reduced (ubiquinol-10) and oxidized (ubiquinone-10) forms of CoQ10. Our results show that CoQ10 was increased in all tissues after supplementation with ubiquinone-10 or ubiquinol-10, with the tissue levels of CoQ10 with ubiquinol-10 being higher than with ubiquinone-10. Moreover, only ubiquinol-10 was able to increase the levels of CoQ10 in mitochondria from cerebrum of Coq9(X/X) mice. Consequently, ubiquinol-10 was more efficient than ubiquinone-10 in increasing the animal body weight and CoQ-dependent respiratory chain complex activities, and reducing the vacuolization, astrogliosis and oxidative damage in diencephalon, septum-striatum and, to a lesser extent, in brainstem. These results suggest that water-soluble formulations of ubiquinol-10 may improve the efficacy of CoQ10 therapy in primary and secondary CoQ10 deficiencies, other mitochondrial diseases and neurodegenerative diseases.
• Keywords: Ubiquinol-10; CoQ10 deficiency; Mitochondrial encephalopathy; Mouse model
• O2k-Network Lab: ES Granada Acuna-Castroviejo D
Regulation: Q-junction effect