Resveratrol Nanoparticle Complex: Potential Therapeutic Applications in Myocardial Ischemia Reperfusion Injury.

Resveratrol (RES) is a natural non-flavonoid polyphenol with cardioprotective activities, antioxidant, antiplatelet, and antiinflammatory. However, its low aqueous solubility, chemical stability, and oral bioavailability, as well as a short circulation half-life greatly limit its clinical applications. To overcome these limitations of RES, we synthesized a methoxy poly(ethylene glycol)-b-oligomerization(D, L-Leucine) (mPEG-b-O(D, L-Leu)) nanoparticle (NP) as the carrier of RES and evaluated the myocardial-protective effectiveness of this RES/NP complex in rat myocardial ischemia-reperfusion injury models. We gauged the characterization of the NP through proton nuclear magnetic resonance spectroscopy, gel permeation chromatography, transmission electron microscope, and Fourier transform infrared spectroscopy and then loaded RES on the nanocarrier by hydrophobic interactions under physiological pH to extend the release time of RES and prolong its circulation half-life. Subsequently, we used rat cardiomyocytes (H9C2 cells) and rat MI/RI model to investigate the relationship between drug composition and myocardial preservation properties. It was found that RES was encapsulated quickly and efficiently, and displayed an effectual loading-capacity and in vitro sustained-release. Anti-MI/RI effect of the RES/NP complex was found satisfactory in rat models in vivo using free RES as the control. This study suggested that NP may prove to be a potent nanocarrier to augment the pharmacotherapy of RES against MI/RI.