Protective Effects of Pterostilbene Against Cardiac Oxidative Stressand Dysfunctionin Nicotine-Induced Cardiac Injury Rat Model

Abstract

Prolonged nicotine exposureescalates the onset and development of cardiovascular diseasesin both active and passive smokers via cardiac injury. Pterostilbene, a resveratrol derivative, has been shown to exhibit high anti-inflammatory,antioxidant and antitumor properties. Nevertheless, its role as a cardioprotective agent in a nicotine-induced rat model is still scarce. Therefore, our study was aimed to investigatethe effects of co-administered pterostilbene against nicotine-induced cardiac injury rat model.Twenty-six male Sprague-Dawley rats were randomly allotted and treated with nicotine (0.6 mg/kg)orin-combination with pterostilbene (10 mg/kg) for 28 consecutive days. Non-invasive tail cuff blood pressure measurements were taken atday-0, day-14 and day-28. Rat hearts were harvested at study endpoint and thechanges in cardiac function parameters and oxidative stress markers were evaluated. The findings have shown that pterostilbene co-administration significantly (P<0.05) reduced the blood pressure and ameliorated nicotine-induced cardiac systolic dysfunction by improving the left ventricular developed pressure (LVDP). In addition, pterostilbene also significantly (P <0.05)attenuatedthe thiobarbituric acid reactive substances (TBARS) level, indicative of protection against nicotine-induced cardiac oxidative stress. In summary, our findings suggest that pterostilbene has the potential to be developed as a natural alternative in protecting the cardiac injuryinduced by nicotine. However further studies are warranted to investigate its efficacy and the underlying mechanism in cardioprotection.