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A parallel increase in placental oxidative stress and antioxidant defenses occurs in pre-gestational type 1 but not gestational diabetes
Authors:J.R. Araú  jo,C. Ramalho,A. Correia-Branco,A. Faria,T. Ferraz,E. Keating,F. Martel
Affiliation:1. Department of Biochemistry (U38-FCT), Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal;2. Department of Obstetrics and Gynaecology, Centro Hospitalar S. João, 4200-319 Porto, Portugal;3. Chemistry Investigation Centre (CIQ), Department of Chemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
Abstract:
We aimed to determine the oxidative stress status in placentas obtained from gestational (GDM) and type 1 (T1D) diabetic pregnancies. Malonaldehyde and protein carbonyls, two biomarkers of oxidative damage, were higher in T1D but not in GDM placentas. Also, higher reduced glutathione and lower oxidized glutathione levels and higher glutathione peroxidase activity were found in T1D but not in GDM placentas. These results suggest that T1D placentas may develop a protective antioxidant mechanism to overcome higher oxidative stress levels.
Keywords:Maternal diabetes   Oxidative stress   Placenta
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