title: Coenzyme Q10 deficiency and isolated myopathy.
abstract: Three unrelated, sporadic patients with muscle coenzyme Q10 (CoQ10) deficiency presented at 32, 29, and 6 years of age with proximal muscle weakness and elevated serum creatine kinase (CK) and lactate levels, but without myoglobinuria, ataxia, or seizures. Muscle biopsy showed lipid storage myopathy, combined deficiency of respiratory chain complexes I and III, and CoQ10 levels below 50% of normal. Oral high-dose CoQ10 supplementation improved muscle strength dramatically and normalized serum CK.
authors.affiliation: Metabolic Disease Center Munich-Schwabing, Institutes of Clinical Chemistry, Molecular Diagnostics and Mitochondrial Genetics, Academic Hospital Schwabing, Munich, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Horvath
authors.forename: P
authors.initials: P
authors.lastname: Schneiderat
authors.forename: B G H
authors.initials: BG
authors.lastname: Schoser
authors.forename: K
authors.initials: K
authors.lastname: Gempel
authors.forename: E
authors.initials: E
authors.lastname: Neuen-Jacob
authors.forename: H
authors.initials: H
authors.lastname: Plöger
authors.forename: J
authors.initials: J
authors.lastname: Müller-Höcker
authors.forename: D E
authors.initials: DE
authors.lastname: Pongratz
authors.forename: A
authors.initials: A
authors.lastname: Naini
authors.forename: S
authors.initials: S
authors.lastname: DiMauro
authors.forename: H
authors.initials: H
authors.lastname: Lochmüller
mesh_terms: D000328:Adult; D003067:Coenzymes; D003402:Creatine Kinase / Q000097:blood; D036861:Delivery, Obstetric; D018450:Disease Progression; D042967:Electron Transport Complex I / Q000172:deficiency; D014450:Electron Transport Complex III / Q000172:deficiency; D005260:Female; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D050356:Lipid Metabolism; D008297:Male; D008661:Metabolism, Inborn Errors / Q000150:complications*; D018908:Muscle Weakness / Q000209:etiology; D018482:Muscle, Skeletal / Q000201:enzymology* / Q000378:metabolism; D009135:Muscular Diseases / Q000188:drug therapy / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology / Q000503:physiopathology; D014451:Ubiquinone / Q000031:analogs & derivatives* / Q000172:deficiency / Q000627:therapeutic use
chemical_list: D003067:Coenzymes; D014451:Ubiquinone; D019344:Lactic Acid; D003402:Creatine Kinase; D042967:Electron Transport Complex I; D014450:Electron Transport Complex III; C024989:coenzyme Q10