Assuntos
Creatina/uso terapêutico , Doença de Leigh/terapia , Ataxia/etiologia , Ataxia/terapia , Pré-Escolar , Creatina/administração & dosagem , Suplementos Nutricionais , Feminino , Insuficiência Cardíaca/etiologia , Insuficiência Cardíaca/terapia , Humanos , Doença de Leigh/complicações , Doença de Leigh/patologia , Imageamento por Ressonância Magnética , Transtornos Respiratórios/etiologia , Transtornos Respiratórios/terapiaRESUMO
The mitochondrial encephalomyopathies are chronic progressive disorders affecting predominantly the neuromuscular system. Symptoms are induced by insufficient energy supply resulting from a deficiency of oxidative phosphorylation. We studied one male and four female patients with genetically proven mitochondrial encephalomyopathy. Their ages ranged from 7 to 19 years (two with Kearns-Sayre syndrome, one patient with neuronal muscle weakness, ataxia, and retinitis pigmentosa syndrome, and two patients with mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes), using a retrospective study method. We studied the effect of creatine supplementation (0.08 g-0.35 g/kg body weight/day; 9 months to 4 years, 10 months) and measured skeletal muscle power analysis (bicycle ergometer). After creatine supplementation all patients demonstrated an increase in their maximum performance (W) (+4% - +30%; mean: +12.1%). These results indicate an improved aerobic oxidative function of mitochondria after creatine administration in patients with mitochondrial encephalomyopathies. Continuous physical exercise was improved to a greater extent than instantaneous activity.