Resumen: We evaluated the coenzyme Q10 (CoQ) levels in patients who were diagnosed with mitochondrial oxidative phosphorylation (OXPHOS) and non-OXPHOS disorders (n = 72). Data from the 72 cases in this study revealed that 44.4% of patients showed low CoQ concentrations in either their skeletal muscle or skin fibroblasts. Our findings suggest that secondary CoQ deficiency is a common finding in OXPHOS and non-OXPHOS disorders. We hypothesize that cases of CoQ deficiency associated with OXPHOS defects could be an adaptive mechanism to maintain a balanced OXPHOS, although the mechanisms explaining these deficiencies and the pathophysiological role of secondary CoQ deficiency deserves further investigation. Idioma: Inglés DOI: 10.1016/j.mito.2016.06.007 Año: 2016 Publicado en: MITOCHONDRION 30 (2016), 51-58 ISSN: 1567-7249 Factor impacto JCR: 3.704 (2016) Categ. JCR: GENETICS & HEREDITY rank: 51 / 165 = 0.309 (2016) - Q2 - T1 Categ. JCR: CELL BIOLOGY rank: 82 / 188 = 0.436 (2016) - Q2 - T2 Factor impacto SCIMAGO: 1.852 - Molecular Medicine (Q1) - Cell Biology (Q2) - Molecular Biology (Q2)