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Type: Artigo de periódico
Title: Assessment of oxidative status markers and NO bioavailability in hypertensive disorders of pregnancy
Author: Gomes, HF
Palei, ACT
Machado, JSR
da Silva, LM
Montenegro, MF
Jordao, AA
Duarte, G
Tanus-Santos, JE
Cavalli, RC
Sandrim, VC
Abstract: The systemic oxidative status in hypertensives disorders of pregnancy (HDP) and its association with endothelial dysfunction is controversial. In the present study, we evaluated systemic plasma levels of oxidative stress markers (TBARS (thiobarbituric acid-reactive substances) and carbonyl) and total antioxidant status (FRAP (ferric reducing ability of plasma (ferric reducing/ antioxidant power) and reduction of MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide))), as well as assessed the impact these markers have on nitric oxide (NO) status in healthy pregnant (HP, n = 38), gestational hypertensive (GH, n = 33) and preeclamptic pregnant women (PE, n 28). We found similar values of TBARS among all groups, and reduced carbonyl levels in HDP between the PE and GH. Conversely, significant increases in plasma activity of antioxidant status were observed in the GH and PE groups compared to the HP group (using both MTT or FRAP method). Importantly, HDP present significantly lower nitrite levels compared to HP women. In Conclusion, our findings show a compensatory antioxidant mechanism against reactive oxygen species (ROS) generation in HDP, which is not associated with nitrite levels restoration.
Subject: Nitrite
nitric oxide
oxidative stress
gestational hypertension
Country: Inglaterra
Editor: Nature Publishing Group
Rights: fechado
Identifier DOI: 10.1038/jhh.2012.58
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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