Oxidative damage and anti-oxidant defense capacity in Cuban patients with mucopolysaccharidosis
Keywords:
child, mucopolysaccharidosis, oxidative stress, glycosaminoglycans, hereditary disorder.Abstract
Introduction: Mucopolysaccharidosis are caused by the deficiency in lysosomal enzyme activities necessary to degrade the glycosaminoglycans. These syndromes share many clinical characteristics although in variable degrees. Clinical manifestations imply multiple organs systems and some have enzyme replacement treatment. Many investigations deal on the presence of oxidative stress in those who suffer it, but this condition has not still been studied in Cuban patients.Objective: To evaluate parameters of oxidative stress in Cuban patients with mucopolysaccharidosis.
Methods: A cases and controls study which included 7 children with mucopolysaccharidosis types I, II, III and IV (cases) and 21 apparently healthy children, paired by age and sex (control group) was carried out. The plasmatic levels of malondialdehide, advanced products of proteins oxidation, free thiol groups and blood chemistry markers were measured. The intraerythrocytic activities of superoxide dismutase, catalase and that of glutathione peroxidase were quantified. All the used techniques were spectrophotometrical.
Results: The patients showed an increase, both in the calcium levels as in the oxidation of proteins and lipids, in comparison with the control group and the Cuban values reference. There was a decrease in the activity of the enzyme superoxide dismutase and the concentrations of thiols groups. There were no differences for the rest of the measured parameters.
Conclusions: The increase of the oxidative damage and the decrease of the anti-oxidant capacity suggest the presence of oxidative stress in those Cuban patients.
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References
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