| Literature DB >> 24784706 |
Alexandre Luz de Castro1, Angela Vicente Tavares1, Cristina Campos1, Rafael Oliveira Fernandes1, Rafaela Siqueira1, Adriana Conzatti1, Amanda M Bicca1, Tânia Regina G Fernandes1, Carmem L Sartório1, Paulo Cavalheiro Schenkel2, Adriane Belló-Klein1, Alex Sander da Rosa Araujo3.
Abstract
Reactive oxygen species (ROS) are involved with progression from infarction to heart failure. Studies show that thyroid hormones (TH) present cardioprotective effects. This study aims to evaluate whether TH effects after infarction are associated to redox balance modulation. Male Wistar rats were divided into four groups: Sham-operated (SHAM), infarcted (AMI), sham-operated+TH (SHAMT), and infarcted+TH (AMIT). During 26 days, animals received T3 (2 μg/100g/day) and T4 (8 μg/100g/day) by gavage. Echocardiographic parameters were assessed and heart tissue was collected to biochemical analysis. AMIT rats presented absence of lung congestion, less cardiac dilatation, and normalization in myocardial performance index, compared with AMI. AMI rats presented an increase in hydrogen peroxide levels and in lipid peroxidation and a decrease in GSH/GSSG. TH prevented these alterations in AMIT. In conclusion, TH seem to reduce the levels of ROS, preventing oxidative stress, and improving cardiac function in infarcted rats.Entities:
Keywords: Reactive oxygen species; Redox balance; T3; T4
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Year: 2014 PMID： 24784706 DOI： 10.1016/j.mce.2014.04.010
Source DB: PubMed Journal: Mol Cell Endocrinol ISSN： 0303-7207 Impact factor: 4.102