Journal
PLOS ONE
Volume 14, Issue 9, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0222334
Keywords
-
Categories
Funding
- CAPES (PROSUP/2015)
- FAPPIC [UP5113/15]
Ask authors/readers for more resources
Aims We assessed the effects of a short-term exercise training on cardiac function, oxidative stress markers, and type 3 iodothyronine deiodinase (D3) activity in cardiac tissue of spontaneously hypertensive rats (SHR) following experimental myocardial infarction (MI). Methods Twenty-four SHR (aged 3 months) were allocated to 4 groups: sham+sedentary, sham +trained, MI+sedentary and MI+trained. MI was performed by permanent ligation of the coronary artery. Exercise training (treadmill) started 96 hours after MI and lasted for 4 weeks (similar to 60% maximum effort, 4x/week and 40 min/day). Cardiac function (echocardiography), thioredoxin reductase (TRx), total carbonyl levels, among other oxidative stress markers and D3 activity were measured. A Generalized Estimating Equation was used, followed by Bonferroni's test (p< 0.05). Results MI resulted in an increase in left ventricular mass (p = 0.002) with decreased cardiac output (similar to 22.0%, p = 0.047) and decreased ejection fraction (similar to 41%, p = 0.008) as well as an increase in the carbonyl levels (p = 0.001) and D3 activity (similar to 33%, p< 0.001). Exercise training resulted in a decrease in left ventricular mass, restored cardiac output (similar to 34%, p = 0.048) and ejection fraction (similar to 20%, p = 0.040), increased TRx (similar to 85%, p = 0.007) and reduced carbonyl levels (p< 0.001) and D3 activity (p< 0.001). Conclusions Our short-term exercise training helped reverse the effects of MI on cardiac function. These benefits seem to derive from a more efficient antioxidant response and lower D3 activity in cardiac tissue.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available