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- Title
Pterostilbene improves cardiac function in a rat model of right heart failure through modulation of calcium handling proteins and oxidative stress.
- Authors
Lacerda, Denise; Türck, Patrick; Campos-Carraro, Cristina; Hickmann, Alexandre; Ortiz, Vanessa; Bianchi, Sara; Belló-Klein, Adriane; de Castro, Alexandre Luz; Bassani, Valquiria Linck; Araujo, Alex Sander da Rosa
- Abstract
This study explored the effect of pterostilbene (PTS) complexed with hydroxypropyl-β-cyclodextrin (HPβCD) on right heart function, glutathione and glutaredoxin systems, and the expression of redox-sensitive proteins involved with regulation calcium levels in the experimental model of pulmonary arterial hypertension (PAH) induced by monocrotaline (MCT). After 7 days of PAH induction, rats received daily doses of the PTS:HPβCD complex (corresponding to 25, 50, or 100 mg·kg−1 of PTS) or vehicle (control group, CTR0) (an aqueous solution containing HPβCD; CTR0 and MCT0 (MCT group that did not receive PTS treatment)) via oral administration for 2 weeks. The results showed that the PTS:HPβCD complex increased the content of reduced glutathione and the activity of glutathione-S-transferase and glutaredoxin in the right ventricle (RV) of MCT-treated rats in a dose-dependent manner. Additionally, at higher doses, it also prevented the reduction of stroke volume and cardiac output, prevented myocardial performance index (MPI) increase, reduced lipoperoxidation, reduced total phospholamban, and increased the expression of sarcoplasmic reticulum calcium ATPase in the RV of MCT-treated rats. These results demonstrate that the PTS:HPβCD complex has a dose-dependent antioxidant mechanism that results in improved cardiac function in experimental right heart failure. Our results open a field of possibilities to PTS administration as new therapeutic approach to conventional therapy for right ventricular dysfunction. Novelty Pterostilbene complexed with hydroxypropyl-β-cyclodextrin could be a new therapeutic approach. Pterostilbene complexed with hydroxypropyl-β-cyclodextrin reestablishes redox homeostasis through glutathione metabolism modulation, leading to an improved MPI in pulmonary arterial hypertension-provoked right heart failure.
- Subjects
STROKE prevention; HEART ventricle diseases; ALKALOIDS; ANIMAL experimentation; ANTIOXIDANTS; BIOLOGICAL models; CALCIUM-binding proteins; CARDIAC output; GENE expression; GLUCANS; GLUTATHIONE; RIGHT heart ventricle; HEART failure; HOMEOSTASIS; ORAL drug administration; OXIDOREDUCTASES; POLYPHENOLS; PULMONARY hypertension; RATS; STILBENE; TRANSFERASES; FUNCTIONAL foods; OXIDATIVE stress
- Publication
Applied Physiology, Nutrition & Metabolism, 2020, Vol 45, Issue 9, p987
- ISSN
1715-5312
- Publication type
Article
- DOI
10.1139/apnm-2019-0864