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• W2024558731 abstract "<i>Background/Objective:</i> Mitochondrial dysfunction, oxidative stress and protein metabolism impairment are the main molecular events underlying the pathogenesis of Parkinson’s disease (PD). However, only few studies have addressed the changes produced by these phenomena in the blood of PD patients. Our purpose was to compare oxidative stress between newly diagnosed PD patients (ntPD) and PD patients under treatment (tPD). We also analyzed changes in plasma activity of several aminopeptidases (AP) involved in the metabolism of various active peptides.<i>Methods:</i> Plasma lipid peroxide (LPO) and lactate (LAC) concentrations were measured by colorimetric methods, and plasma AP activities were determined by fluorometric assay. <i>Results:</i> LPO and LAC concentrations were significantly elevated in ntPD and tPD patients versus controls, but there were no differences between the PD groups. Alanine-, cystine- and aspartate-AP activities were significantly lower in tPD versus ntPD patients. Nondenaturing electrophoresis and Western blot results confirmed these findings. <i>Conclusions:</i> The plasma LPO and LAC levels were high in both PD groups, indicating that they are elevated at an early stage of PD and are not affected by anti-PD treatment. The higher AP activities in ntPD versus tPD patients suggest that anti-PD treatment may improve protein metabolism while not altering oxidative stress. A therapy directed to reduce oxidative stress and normalize AP activity may be useful in the treatment of PD." @default.
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• W2024558731 date "2010-08-12" @default.
• W2024558731 modified "2023-10-02" @default.
• W2024558731 title "Oxidative Stress and Aminopeptidases in Parkinson’s Disease Patients with and without Treatment" @default.
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• W2024558731 doi "https://doi.org/10.1159/000315404" @default.
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