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Melatonin protects against ischemic heart failure in rats
Ahmet Özer Şehirli1, Derya Koyun, Şermin Tetik
1Department of Pharmacology, School of Pharmacy, Marmara University, Istanbul, Turkey.
Journal of Pineal Research
|April 5, 2013
Summary
Melatonin supplementation effectively ameliorates (meliorates) ischemic heart failure in rats by reducing oxidative stress and improving cardiac function. This study highlights melatonin as a promising therapeutic agent for heart conditions.
Area of Science:
- Cardiovascular Science
- Pharmacology
- Biochemistry
Background:
- Ischemic injury, driven by sympathetic hyperactivity, is a key factor in heart failure development.
- Melatonin possesses known antiatherogenic, antioxidant, and vasodilatory properties.
- Oxidative stress significantly contributes to the pathogenesis of heart failure.
Purpose of the Study:
- To investigate the protective effects of melatonin against ischemic heart failure (HF).
- To evaluate melatonin's impact on cardiac function and biochemical markers in an experimental HF model.
Main Methods:
- Heart failure was induced in Wistar albino rats via left anterior descending (LAD) coronary artery ligation.
- Rats received either vehicle or melatonin (10 mg/kg) treatment for four weeks.
- Echocardiography, plasma enzyme analysis, cardiac oxidative stress markers, and protein levels (SERCA, caveolin-3) were assessed.
Main Results:
- Vehicle-treated HF rats exhibited decreased cardiac Na+, K+-ATPase and SERCA activities, reduced glutathione (GSH) levels, and lower caveolin-3 expression.
- Elevated plasma lactate dehydrogenase (LDH), creatine kinase (CK), and lysosomal enzyme activities were observed in HF rats.
- Melatonin treatment reversed these detrimental changes, improving cardiac function and reducing oxidative stress markers.
Conclusions:
- Melatonin effectively ameliorates (meliorates) ischemic heart failure in a rat model.
- Melatonin demonstrates potential as a cardioprotective supplement by enhancing antioxidant defense mechanisms against heart failure-induced oxidative stress.
